Audit Information |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Audit Information [Abstract] | |
| Auditor Name | Ernst & Young LLP |
| Auditor Location | Boston, Massachusetts |
| Auditor Firm ID | 42 |
CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Available-for-sale debt securities, amortized cost | $ 4,143,163 | $ 4,778,644 |
| Held-to-maturity debt securities, fair value | $ 575,974 | $ 371,724 |
| Common stock, par value (in shares) | $ 0.01 | $ 0.01 |
| Common stock, authorized (in shares) | 1,000,000,000 | 1,000,000,000 |
| Common stock issued (in shares) | 235,646,558 | 213,909,472 |
| Common stock outstanding (in shares) | 235,646,558 | 213,909,472 |
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Statement of Comprehensive Income [Abstract] | |||
| Net income | $ 88,219 | $ 119,561 | $ 232,177 |
| Other comprehensive income, net of tax: | |||
| Net change in fair value of securities available for sale | 324,514 | 368 | 295,913 |
| Net change in fair value of cash flow hedges | 23,480 | 5,101 | 18,588 |
| Net change in other comprehensive income for defined benefit postretirement plans | 8,972 | 18,554 | 339 |
| Total other comprehensive income | 356,966 | 24,023 | 314,840 |
| Total comprehensive income | $ 445,185 | $ 143,584 | $ 547,017 |
CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (Parenthetical) - USD ($) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Jan. 01, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Accounting Standards Update [Extensible Enumeration] | Accounting Standards Update 2022-02 | ||||
| Retained earnings | $ 2,067,327 | $ 2,084,503 | |||
| Deferred income tax (benefit) expense | $ (13,550) | $ 36,059 | $ (18,267) | ||
| Dividends declared (in dollars per share) | $ 0.51 | $ 0.45 | $ 0.41 | ||
| Restricted Stock Awards | Cambridge Bancorp | |||||
| Issuance of restricted stock awards (in shares) | 118,693 | ||||
| Restricted stock award shares, at fair value | $ 1,100 | ||||
| Cumulative effect accounting adjustment | |||||
| Retained earnings | $ 1,100 | ||||
| Deferred income tax (benefit) expense | $ 300 | ||||
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Operating activities | |||||
| Net income (loss) from continuing operations | $ 88,219 | $ 119,561 | $ (62,689) | ||
| Net income from discontinued operations | 0 | 0 | 294,866 | ||
| Net income | 88,219 | 119,561 | 232,177 | ||
| Adjustments to reconcile net income to net cash provided by operating activities | |||||
| Provision for allowance for loan losses | 26,200 | 67,380 | 20,052 | ||
| Depreciation and amortization | 46,942 | 27,030 | 12,295 | ||
| (Accretion) amortization of deferred loan fees and premiums, net | (48,374) | (13,557) | 6,445 | ||
| Deferred income tax (benefit) expense | (13,550) | 36,059 | (18,267) | ||
| (Accretion) amortization of investment security premiums and discounts, net | (7,268) | 4,539 | 6,281 | ||
| Right-of-use asset amortization | 16,584 | 11,277 | 11,348 | ||
| Share-based compensation | 16,906 | 19,269 | 16,047 | ||
| Increase in cash surrender value of bank-owned life insurance | (5,642) | (4,326) | (3,912) | ||
| Loss on sales of securities available for sale, net | 269,638 | 16,798 | 333,170 | ||
| Loss on right-of-use assets, net of gains from modifications | 3,592 | 4,685 | 395 | ||
| Employee Stock Ownership Plan expense | 8,390 | 7,356 | 7,129 | ||
| Net gain on sale of other equity investments | (1,584) | (9,291) | 0 | ||
| Other | (253) | 3,791 | 3,224 | ||
| Loans held for sale: | |||||
| Proceeds from the sales of loans held for sale | 159,543 | 92,904 | 73,829 | ||
| Loans originated for sale, net of repayments | (141,306) | (93,072) | (48,807) | ||
| Change in: | |||||
| Prepaid pension (benefit) expense | (5,259) | (10) | 4,260 | ||
| Other assets | 69,684 | (61,851) | (14,394) | ||
| Other liabilities | (50,042) | 55,294 | 39,035 | ||
| Net cash provided by operating activities - continuing operations | 432,420 | 283,836 | 385,441 | ||
| Net cash used in operating activities - discontinued operations | 0 | 0 | (123,749) | ||
| Net cash provided by operating activities | 432,420 | 283,836 | 261,692 | ||
| Investing activities | |||||
| Proceeds from sales of securities available for sale | 1,635,613 | 1,071,021 | 1,899,724 | ||
| Proceeds from maturities and principal paydowns of securities available for sale | 465,394 | 373,017 | 423,885 | ||
| Purchases of securities available for sale | (1,429,952) | (199,527) | 0 | ||
| Proceeds from maturities and principal paydowns of securities held to maturity | 25,781 | 29,439 | 27,397 | ||
| Purchases of securities held to maturity | (202,373) | 0 | 0 | ||
| Proceeds from sale of Federal Home Loan Bank stock | 42,885 | 30,906 | 286,309 | ||
| Purchases of Federal Home Loan Bank stock | (26,117) | (3,612) | (250,850) | ||
| Contributions to low income housing tax credit investments | (59,349) | (68,555) | (36,939) | ||
| Contributions to other equity investments | (1,698) | (1,005) | (720) | ||
| Distributions from other equity investments | 5,437 | 387 | 362 | ||
| Proceeds from sale of other equity investment | 1,944 | 9,958 | 0 | ||
| Net increase in outstanding loans | (802,374) | (209,088) | (429,268) | ||
| Net cash (paid) acquired in business combination | (1,412) | 24,879 | 0 | ||
| Purchased banking premises and equipment | (19,434) | (13,539) | (8,140) | ||
| Proceeds from sale of bank premises and equipment | 0 | 15,116 | 0 | ||
| Proceeds from life insurance policies | 1,634 | 0 | 0 | ||
| Net cash (used in) provided by investing activities - continuing operations | (364,021) | 1,059,397 | 1,911,760 | ||
| Net cash provided by investing activities - discontinued operations | 0 | 0 | 488,505 | ||
| Net cash (used in) provided by investing activities | (364,021) | 1,059,397 | 2,400,265 | ||
| Financing activities | |||||
| Net increase (decrease) in demand, savings, interest checking, and money market investment deposit accounts | 10,353 | (384,720) | (2,463,133) | ||
| Net (decrease) increase in time deposits | (192,104) | 208,515 | 1,084,655 | ||
| Net decrease in borrowed funds | [1] | (369,344) | (742,059) | (692,276) | |
| Payments for repurchases of common stock | (106,589) | (27,683) | 0 | ||
| Proceeds from the exercise of stock options | 5,113 | 0 | 0 | ||
| Stock issuance costs | (122) | (941) | 0 | ||
| Dividends declared and paid to common shareholders | (105,717) | (82,541) | (66,671) | ||
| Net cash used in financing activities - continuing operations | (758,410) | (1,029,429) | (2,137,425) | ||
| Net cash used in financing activities - discontinued operations | 0 | 0 | (961) | ||
| Net cash used in financing activities | (758,410) | (1,029,429) | (2,138,386) | ||
| Net (decrease) increase in cash, cash equivalents, and restricted cash | (690,011) | 313,804 | 523,571 | ||
| Cash, cash equivalents, and restricted cash at beginning of period | 1,006,880 | 693,076 | 169,505 | ||
| Cash, cash equivalents, and restricted cash at end of period | 316,869 | 1,006,880 | 693,076 | ||
| Cash paid during the period for: | |||||
| Interest paid on deposits and borrowings | 333,260 | 316,128 | 231,765 | ||
| Income taxes (refunded) paid | (2,514) | 18,786 | 65,921 | ||
| Non-cash activities | |||||
| Capital commitments relating to low income housing tax credit projects | 23,796 | 8,963 | 102,001 | ||
| Net increase (decrease) in operating lease right of use assets and operating lease liabilities relating to lease remeasurements/modifications | $ 2,362 | $ 5,492 | $ (3,881) | ||
| |||||
Corporate Structure and Nature of Operations; Basis of Presentation |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Corporate Structure and Nature of Operations; Basis of Presentation | Corporate Structure and Nature of Operations; Basis of Presentation Corporate Structure and Nature of Operations Eastern Bankshares, Inc., a Massachusetts corporation (the “Company”), is a bank holding company. Through its wholly-owned subsidiary, Eastern Bank (the “Bank”), the Company provides a variety of banking services and trust and investment services, through its full-service bank branches, located primarily in eastern Massachusetts, southern and coastal New Hampshire, and Rhode Island. Eastern Insurance Group was a wholly-owned subsidiary of the Bank. On September 19, 2023, the Company and the Bank entered into an asset purchase agreement in which Arthur J. Gallagher & Co. (“Gallagher”) agreed to purchase substantially all of Eastern Insurance Group’s assets for cash consideration and to assume certain liabilities. On October 31, 2023, the Company completed its sale of its insurance agency business to Gallagher. Refer to Note 24, “Discontinued Operations” for further discussion regarding discontinued operations. The activities of the Company are subject to the regulatory supervision of the Board of Governors of the Federal Reserve System (“Federal Reserve”). The activities of the Bank are subject to the regulatory supervision of the Massachusetts Commissioner of Banks, the Federal Deposit Insurance Corporation (“FDIC”) and the Consumer Financial Protection Bureau (“CFPB”). The Company and the activities of the Bank and its subsidiaries are also subject to various Massachusetts, New Hampshire and Rhode Island business, banking and trust-related regulations. Basis of Presentation The Company’s Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States (“GAAP”) as set forth by the Financial Accounting Standards Board (“FASB”) and its Accounting Standards Codification (“ASC”) and Accounting Standards Updates (“ASU”) as well as the rules and interpretive releases of the SEC under the authority of federal securities laws. The Consolidated Financial Statements include the accounts of the Company, its wholly-owned subsidiaries, and entities in which it holds a controlling financial interest through being the primary beneficiary or through holding a majority of the voting interest. All intercompany accounts and transactions have been eliminated in consolidation. Certain previously reported amounts have been reclassified to conform to the current period’s presentation which includes: •reclassification of escrow deposits of borrowers to savings accounts and the related interest expense from interest on borrowings to interest on deposits; •combination of certain credit card income balances previously included in other noninterest income and debit card processing fees into a new financial statement line item titled “card income;” •reclassification of certain mortgage banking income accounts previously included in “(losses) gains on mortgage loans held for sale, net” and in “other noninterest income” to a new financial statement line item titled “mortgage banking income (loss).” •combination of certain non-operating income accounts previously included in other noninterest income into a new financial statement line item titled “other non-operating income;” •combination of certain non-operating expense accounts previously included in other noninterest expense into a new financial statement line item titled “non-operating expenses;” •reclassification of merger and acquisition expenses previously included in salaries and employee benefits, occupancy and equipment, technology and data processing, professional services, marketing, and other operating expenses into a new financial statement line item titled “non-operating expenses;” and •reclassification of proceeds from sales of loans held for investment and loan purchases to “net increase in outstanding loans.”
|
Summary of Significant Accounting Policies |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Accounting Policies [Abstract] | |
| Summary of Significant Accounting Policies | Summary of Significant Accounting Policies Use of Estimates In preparing the Consolidated Financial Statements in conformity with GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheets and income and expenses for the periods reported. Actual results could differ from those estimates based on changing conditions, including economic conditions and future events. Material estimates that are particularly susceptible to change relate to the determination of the allowance for loan losses, valuation and fair value measurements, allowance for credit losses on investment securities, the liabilities for benefit obligations (particularly pensions), the provision for income taxes and impairment of goodwill and other intangible assets. Cash and Cash Equivalents Cash and cash equivalents include cash on hand and amounts due from banks, federal funds sold, and other short-term investments including restricted cash pledged, all of which have an original maturity of 90 days or less. Cash and cash equivalents includes $5.0 million and $30.0 million of restricted cash pledged as collateral at December 31, 2025 and 2024, respectively, which for purposes of the Company’s Consolidated Statements of Cash Flows, is included in cash, cash equivalents and restricted cash. Securities Debt securities are classified at the time of purchase as either “trading,” “available for sale” (“AFS”) or “held to maturity” (“HTM”). Equity securities are measured at fair value with changes in the fair value recognized through net income. Debt securities that are bought and held principally for the purpose of resale in the near term are classified as trading securities and recorded at fair value, with subsequent changes in fair value included in net income. Debt securities that the Company has the positive intent and the ability to hold to maturity are classified as HTM securities and recorded at amortized cost. Debt securities not classified as either trading or HTM are classified as AFS and recorded at fair value, with changes in fair value excluded from net income and reported in other comprehensive income, net of related tax. Amortization of premiums and accretion of discounts are computed using the effective interest rate method. The Company’s AFS securities are carried at fair value. For AFS securities in an unrealized loss position, management will first evaluate whether there is intent to sell a security, or if it is more likely than not that the Company will be required to sell a security prior to anticipated recovery of its amortized cost basis. If either of these criteria are met, the Company will record a write-down of the security’s amortized cost basis to fair value through income. For those AFS securities which do not meet the intent or requirement to sell criteria, management will evaluate whether the decline in fair value is a result of credit related matters or other factors. In performing this assessment, management considers the creditworthiness of the issuer including whether the security is guaranteed by the U.S. federal government or other government agency, the extent to which fair value is less than amortized cost, and changes in credit rating during the period, among other factors. If this assessment indicates the existence of credit losses, an allowance for credit losses will be established, as determined by a discounted cash flow analysis. To the extent the estimated cash flows do not support the amortized cost, the deficiency is considered to be due to credit loss and is recognized in earnings. The Company measures expected credit losses on AFS securities on a collective basis by major security type. Changes in the allowance for credit losses are recorded as a provision for (or reversal of) credit loss expense. Losses are charged against the allowance when the security is determined to be uncollectible, or when either of the aforementioned criteria surrounding intent or requirement to sell have been met. Gains and losses on sales of securities are recognized at the time of sale on the specific-identification basis. Refer to Note 4, “Securities” for additional information regarding the measurement of impairment losses on AFS securities. Allowance for Credit Losses - Held to Maturity Securities The Company measures expected credit losses on HTM securities on a collective basis by major security type which, as of December 31, 2025, included government-sponsored residential, commercial mortgage-backed securities, state and municipal bonds and obligations, and corporate debt bonds. Government-sponsored residential and commercial mortgage-backed securities in the Company’s HTM portfolio are guaranteed by either the U.S. federal government or other government sponsored agencies with a long history of no credit losses. As a result, management has determined that these securities have a zero loss expectation and therefore does not record an allowance for credit losses on these securities. State and municipal bonds and obligations and corporate debt bonds are evaluated periodically to determine if an allowance for credit losses is warranted; however, such securities do not have a history of credit losses. Refer to Note 4, “Securities” for additional information regarding the measurement of credit losses on HTM securities. Loans Loans are reported at their principal amount outstanding, net of deferred loan fees and costs and any unearned discount or unamortized premium for acquired loans. Unearned discount and unamortized premium are accreted and amortized, respectively, to interest and dividend income on a basis that results in level rates of return over the terms of the loans. For originated loans, origination fees and related direct incremental origination costs are offset, and the resulting net amount is deferred and amortized over the life of the related loans using the effective interest method, assuming a certain level of prepayments. When loans are sold or repaid, the unamortized fees and costs are recorded to interest and dividend income. Interest income on loans is accrued based upon the daily principal amount outstanding except for loans on non-accrual status. For acquired loans, interest income is also accrued based upon the daily principal amount outstanding and is adjusted further by the accretion of any discount or amortization of any premium associated with the loan. Non-performing Loans (“NPLs”) Non-accrual Loans Interest accruals are generally discontinued when management has determined that the borrower may be unable to meet contractual obligations and/or when loans are 90 days or more past due. Exceptions may be made if management believes that collateral held by the Company is clearly sufficient and in full satisfaction of both principal and interest. When a loan is placed on non-accrual, all interest previously accrued but not collected is reversed against current period income and amortization of deferred loan fees and costs and unamortized premiums and unearned discounts is discontinued. Interest received on non-accrual loans is either applied against principal or reported as income according to management’s judgment as to the collectability of principal. Non-accrual loans may be returned to an accrual status when principal and interest payments are no longer delinquent, and the risk characteristics of the loan have improved to the extent that there no longer exists a concern as to the collectability of principal and interest. Loans are considered past due based upon the number of days delinquent according to their contractual terms. Non-accrual loans and loans that are more than 90 days past due but still accruing interest are considered NPLs. Loans Individually Assessed for Impairment ASC 326 indicates that a loan should be measured for impairment individually if that loan shares no similar risk characteristics with other loans. For the Company, loans which have been identified as those to be individually assessed for impairment under CECL include loans that do not share similar risk characteristics with other loans in the corresponding reserve segment. Characteristics of loans meeting this definition may include, but are not limited to: •Loans determined to be collateral dependent as defined below; •Loans on non-accrual status; •Loans with a risk rating of 12 under the Company’s risk rating scale, substandard (well-defined weakness) or worse; •Loans to borrowers actively involved in bankruptcy proceedings; and •Loans that have been partially charged-off. Collateral-Dependent Loans Management considers a loan to be collateral-dependent when foreclosure of the underlying collateral is probable. In addition, in accordance with ASC 326, the Company elected to apply the collateral-dependent practical expedient whereby the Company measures expected credit losses using the fair value of the collateral, less any estimated costs to sell, when foreclosure is not probable but repayment of the loan is expected to be provided substantially through the operation or sale of the collateral, and the borrower is experiencing financial difficulty. Modifications of Loans to Borrowers Experiencing Financial Difficulty The Company applies the loan refinancing and restructuring guidance codified in paragraphs 310-20-35-9 through 35-11 of the Accounting Standards Codification to determine whether a modification results in a new loan or a continuation of an existing loan. Modifications to borrowers experiencing financial difficulty include principal forgiveness, interest rate reductions, term extensions, other-than-insignificant payment delays and combinations thereof. Expected losses or recoveries related to loans where modifications have been granted to borrowers experiencing financial difficulty have been included in the Company’s determination of the allowance for loan losses. The Company applies the same credit methodology it uses for similar loans that were not modified. Acquired Loans The Company periodically acquires loans through purchases and business combinations. Acquired loans are evaluated upon acquisition to determine if they are PCD loans which are acquired individual loans (or acquired groups of loans with similar risk characteristics) that, as of the date of acquisition, have experienced a more-than-insignificant deterioration in credit quality since origination, as determined by the Company’s assessment. An acquired loan that is not a PCD loan is evaluated to determine if it is a purchased seasoned loan (“PSL”). All loans acquired in a business combination that are not PCD loans, are assessed to determine if they are PSL’s. PCD loans and PSL’s are recorded at their purchase price plus the allowance for loan losses expected at the time of acquisition, or “gross up” of the amortized cost basis, if any. Changes in the current estimate of the allowance for loan losses subsequent to acquisition from the estimated allowance previously recorded are recognized in the income statement as provision for credit losses or reversal of provision for credit losses in subsequent periods as they arise. Evidence that purchased loans, measured at amortized cost, have more-than-insignificant deterioration in credit quality since origination and, therefore meet the PCD definition, may include past-due status, non-accrual status, risk rating and other standard indicators (i.e., modification due to financial difficulty, charge-offs, bankruptcy). Previous to the Company’s adoption of ASU 2025-08, described further below, a purchased loan that did not qualify as a PCD asset was accounted for similar to the Company’s method of accounting for originated assets, whereby an allowance for loan losses was recognized with a corresponding increase to the income statement provision for loan losses. Allowance for Credit Losses The allowance for credit losses, or “ACL,” is established to provide for the Company’s current estimate of expected lifetime credit losses on loans measured at amortized cost and unfunded lending commitments at the balance sheet date and is established through a provision for credit losses charged to net income. Credit losses are charged directly to the ACL. Subsequent recoveries, if any, are credited to the ACL. Commercial and residential loans are charged-off in the period in which they are deemed uncollectible. Delinquent loans in these product types are subject to ongoing review and analysis to determine if a charge-off in the current period is appropriate. For consumer finance loans, policies and procedures exist that require charge-off consideration upon a certain triggering event depending on the product type. Charge-off triggers include: 120 days delinquent for automobile, home equity, and other consumer loans with the exception of cash reserve loans for which the trigger is 150 days delinquent; death of the borrower; or Chapter 7 bankruptcy. In addition to those events, the charge-off determination includes other loan quality indicators, such as collateral position and adequacy or the presence of other repayment sources. The ACL is evaluated on a regular basis by management. Management uses a methodology to systematically estimate the amount of expected lifetime losses in the portfolio. Expected lifetime losses are estimated on a collective basis for loans sharing similar risk characteristics and are determined using a quantitative model combined with an assessment of certain qualitative factors designed to address forecast risk and model risk inherent in the quantitative model output. For the commercial and industrial, commercial real estate, commercial construction and business banking portfolios, the quantitative model uses a loan rating system which is comprised of management’s determination of a financial asset’s probability of default (“PD”), loss given default (“LGD”) and exposure at default (“EAD”), which are derived from both the Company’s and industry historical loss experience and other factors. For residential real estate, consumer home equity and other consumer portfolios, the Company’s quantitative model uses historical loss experience. The quantitative model estimates expected credit losses using loan level data over the estimated life of the exposure, considering the effect of prepayments. Economic forecasts are incorporated into the estimate over a reasonable and supportable forecast period, beyond which is a reversion to the Company’s and/or industry historical loss average. Management has determined that a reasonable and supportable forecast period of eight quarters, and a straight-line reversion period of four quarters, are appropriate forecast periods for purposes of estimating expected credit losses. As described above, quantitative model results are adjusted for risk factors not considered within the model but which are relevant in estimating the expected credit losses within the loan portfolio. The qualitative risk factors impacting the expected risk of loss within the loan portfolio include the following: •Lending policies and procedures, including underwriting standards and collection, charge-off and recovery practices; •Nature and volume of the portfolio; •Volume and severity of past-due, non-accrual and classified loans; •The value of the underlying collateral for loans that are not collateral dependent; •Concentrations of credit risk; •Model and data limitations; and •Other external factors, such as changes in legal, regulatory or competitive environments. Loans that do not share similar risk characteristics with any pools of assets are subject to individual evaluation and are removed from the collectively assessed pools. For loans that are individually evaluated, the Company uses either a discounted cash flow (“DCF”) approach or, for loans deemed to be collateral dependent or when foreclosure is probable, a fair value of collateral approach. Accrued interest receivable amounts are excluded from balances of loans held at amortized cost and are included within other assets on the Consolidated Balance Sheet. Management has elected not to measure an allowance for credit losses on these amounts as the Company employs a timely write-off policy. Consistent with the Company's policy for non-accrual loans, accrued interest receivable is typically written off when loans reach 90 days past due and are placed on non-accrual status. In the ordinary course of business, the Company enters into commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the reserving method for loans receivable previously described. The reserve for unfunded lending commitments is included in other liabilities in the Consolidated Balance Sheets. Additionally, various regulatory agencies, as an integral part of the Company’s examination process, periodically assess the appropriateness of the allowance for credit losses and may require the Company to increase its allowance for loan losses or recognize further loan charge-offs, in accordance with GAAP. Refer to Note 6, “Loans and Allowance for Credit Losses” for additional information regarding the Company’s measurement of credit losses on loans receivable and off-balance sheet commitments to lend. Loans Held for Sale Mortgage loans held for sale to the secondary market are carried at the lower of cost or estimated market value on an individual loan basis. The Company enters into commitments to fund residential mortgage loans with an offsetting forward commitment to sell them in the secondary markets in order to mitigate interest rate risk. Gains or losses on sales of mortgage loans are recognized in the Consolidated Statements of Income at the time of sale. Interest income is recognized on loans held for sale between the time the loan is funded and the loan is sold. Direct loan origination costs and fees are deferred upon origination and are recognized in the Consolidated Statements of Income on the date of sale. Certain mortgage loans that are originated for sale are accounted for under the fair value option, which is elected at origination, whereby any changes in fair value relating to loans intended for sale are recorded in earnings and are offset by changes in fair value relating to interest rate lock commitments and forward sales commitments. Gains and losses on residential loan sales are recorded in mortgage banking income. Upfront costs and fees related to items for which the fair value option is elected are recognized in earnings as incurred and are not deferred. Mortgage Servicing Rights When mortgage loans are sold with servicing retained, servicing rights are initially recorded at fair value with subsequent changes in fair value recorded in income through mortgage banking income. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. Under the fair value measurement method, the Company measures mortgage servicing rights (“MSRs”) at fair value at each reporting date and reports changes in fair value of servicing assets in earnings in the period in which the changes occur and are included with changes in mortgage servicing rights fair value on the Consolidated Statements of Income. The fair values of servicing rights are subject to significant fluctuations as a result of changes in estimated and actual prepayments speeds and default rates and losses. Servicing fee income, which is reported on the Consolidated Statements of Income within mortgage banking income, is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of outstanding principal; or a fixed amount per loan and are recorded as income when earned. Late fees and ancillary fees related to loan servicing are not material. Other Real Estate Owned OREO consists of properties and other assets acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure. OREO is recorded in other assets in the Consolidated Balance Sheets, on an individual asset basis at the fair value less estimated costs to sell on the date control is obtained. Any write-downs to the cost of the related asset upon transfer to OREO to reflect the asset at fair value less estimated costs to sell is recorded through the allowance for loan losses. The Company relies primarily on third-party valuation information from certified appraisers and values are generally based upon recent appraisals of the underlying collateral, brokers’ opinions based upon recent sales of comparable properties, estimated equipment auction or liquidation values, income capitalization, or a combination of income capitalization and comparable sales. As of December 31, 2025 and 2024, the Company held no OREO. Federal Home Loan Bank Stock The Company, as a member of the Federal Home Loan Bank (“FHLB”) of Boston (“FHLBB”), is required to maintain an investment in capital stock of the FHLB. Based on redemption provisions, the stock has no quoted market value and is carried at cost. Premises and Equipment Land is carried at cost. Buildings, leasehold improvements and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets. Leasehold improvements are amortized over the shorter of the lease terms or the estimated lives of the improvements. Expected lease terms include lease options to the extent that the exercise of such options is reasonably assured. Banking premises and equipment held for sale are carried at the lower of cost or estimated fair value, less estimated costs to sell. Goodwill and Other Intangible Assets Acquisitions of businesses are accounted for using the acquisition method of accounting. Accordingly, the net assets of the companies acquired are recorded at their fair values at the date of acquisition. Goodwill represents the excess of purchase price over the fair value of net assets acquired. Other intangible assets represent acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights, or because the asset is capable of being sold or exchanged either on its own, or in combination with a related contract, asset, or liability. The Company evaluates goodwill for impairment at least annually, as of November 30, or more often if warranted, using a quantitative impairment approach. The quantitative impairment test compares the book value to the fair value of each reporting unit. If the book value exceeds the fair value, an impairment is charged to net income. Management has identified one reporting unit for purposes of testing goodwill for impairment which is referred to as “the banking business.” Other intangible assets, all of which are definite-lived, are stated at cost less accumulated amortization. The Company evaluates other intangible assets for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be fully recovered. The Company considers factors including, but not limited to, changes in legal factors and business climate that could affect the value of the intangible asset. Any impairment losses are charged to net income. The Company amortizes other intangible assets over their respective estimated useful lives. The estimated useful lives of core deposit identifiable intangible assets fall within a range of to seven years and the estimated useful lives of the customer list and trade name intangible assets from the Cambridge Bancorp (“Cambridge”) merger are and five years, respectively. The Company reassesses the useful lives of other intangible assets at least annually, or more frequently based on specific events or changes in circumstances. Retirement Plans The Company provides benefits to its employees and executive officers through various retirement plans, including a defined benefit plan, a defined benefit supplemental executive retirement plan, a defined contribution plan, a benefit equalization plan, and an outside directors’ retainer continuance plan. The Company provides pension benefits for its employees using a noncontributory, qualified defined benefit plan, through membership in the Savings Banks Employees Retirement Association (“SBERA”). The Qualified Defined Benefit Pension Plan (“Defined Benefit Plan”) is a noncontributory, defined benefit plan. The Company’s employees become eligible after attaining age 21 and completing one year of service. Effective November 1, 2020, the Defined Benefit Plan, sponsored by the Company, was amended to convert the plan from a traditional final average earnings plan design to a cash balance plan design. Under the final average earnings plan design, benefits became fully vested after three years of eligible service for individuals employed on or before October 31, 1989. For individuals employed subsequent to October 31, 1989 and who were already in the Defined Benefit Plan as of November 1, 2020, benefits became fully vested after five years of eligible service. Under the cash balance plan design, hypothetical account balances are established for each participant and pension benefits are generally stated as the lump sum amount in that hypothetical account. Contribution credits equal to a percentage of a participant’s annual compensation (if the participant works at least 1,000 hours during the year) and interest credits equal to the greater of the 30-Year Treasury rate for September preceding the current plan year or 3.5% are added to a participant’s account each year. For employees hired prior to November 1, 2020, annual contribution credits generally increase as the participant remains employed with the Company. Employees hired on and after November 1, 2020 receive annual contribution credits equal to 5% of annual compensation, with no future increases. Notwithstanding the preceding sentence, since a cash balance plan is a defined benefit plan, the annual retirement benefit payable at normal retirement (age 65) is an annuity, which is the actuarial equivalent of the participant’s account balance under the cash balance plan design, plus their frozen benefit under the final average earnings plan design. However, under the Defined Benefit Plan, participants may elect, with the consent of their spouses if they are married, to have the benefits distributed as a lump sum rather than an annuity. The lump sum is equal to the sum of the actuarial equivalent of their frozen benefit under the final average earnings plan design, plus their cash balance account. Under the Company’s non-Qualified Benefit Equalization Plan (“BEP”), which is described further below, benefits are generally only payable as a lump sum, which is equal to the sum of the actuarial equivalent of their frozen benefit under the final average earnings plan design, plus their cash balance account. The Company’s annual contribution to the plan is based upon standards established by the Pension Protection Act. The contribution is based on an actuarial method intended to provide not only for benefits attributable to service to date, but also for those expected to be earned in the future. The Company also has an unfunded Defined Benefit Supplemental Executive Retirement Plan (“DB SERP”) that provides certain retired officers with defined pension benefits in excess of qualified plan limits imposed by U.S. federal tax law. The DB SERP has a plan year end of December 31. The Company’s BEP, which is an unfunded plan, provides retirement benefits to certain employees whose retirement benefits under the Defined Benefit Plan are limited per the Internal Revenue Code. The BEP has a plan year end of October 31. Effective November 1, 2020, the BEP, sponsored by the Company, was amended to convert the plan from a traditional final average earnings plan design to a cash balance plan design. The Company also has an unfunded Outside Directors’ Retainer Continuance Plan (“ODRCP”) that provides pension benefits to outside directors who retire from service. The Outside Directors’ Retainer Continuance Plan has a plan year end of December 31. Effective December 31, 2020, the Company closed the ODRCP to new participants and froze benefit accruals for active participants. Defined Benefit Plan assets are invested in various investment funds and held at fair value which generally represents observable market prices. Pension liability is determined based on the actuarial cost method factoring in assumptions such as salary increases, expected retirement date, mortality rate, and employee turnover. The actuarial cost method used to compute the pension liabilities and related expense is the traditional unit credit method. The projected benefit obligation is principally determined based on the present value of the projected benefit distributions at an assumed discount rate (which is the rate at which the projected benefit obligation could be effectively settled as of the measurement date). The discount rate which is utilized is determined using the spot rate approach whereby the individual spot rates on the Financial Times and Stock Exchange (“FTSE”) above-median yield curve are applied to each corresponding year’s projected cash flow used to measure the respective plan’s service cost and interest cost. Periodic pension expense (or income) includes service costs, interest costs based on the assumed discount rate, the expected return on plan assets, if applicable, based on the market value of assets and amortization of actuarial gains and losses. Net periodic benefit cost excluding service cost is included within other noninterest expense in the Consolidated Statements of Income. Service cost for all plans is included in salaries and employee benefits in the Consolidated Statements of Income. The amortization of actuarial gains and losses for the DB SERP and ODRCP is determined using the 10% corridor minimum amortization approach and is taken over the average remaining future service of the plan participants for the ODRCP, and over the average remaining future life expectancy of plan participants for the DB SERP. The amortization of actuarial gains and losses for the Defined Benefit Plan is determined without using the 10% corridor minimum amortization approach and is taken over the average remaining future service of the plan participants. The overfunded or underfunded status of the plans is recorded as an asset or liability on the Consolidated Balance Sheets, with changes in that status recognized through other comprehensive income, net of related taxes. Funded status represents the difference between the projected benefit obligation of the plan and the market value of the plan’s assets. Employee Tax Deferred Incentive Plan The Company has an employee tax deferred incentive plan (“401(k) plan”) under which the Company makes voluntary contributions within certain limitations. All employees who meet specified age and length of service requirements are eligible to participate in the 401(k) plan. The amount contributed by the Company is included in salaries and employee benefits expense. Defined Contribution Supplemental Executive Retirement Plan The Company has a defined contribution supplemental executive retirement plan (“DC SERP”), which allows certain senior officers to earn benefits calculated as a percentage of their compensation. The participant benefits are adjusted based upon a deemed investment performance of measurement funds selected by the participant. These measurement funds are for tracking purposes and are used only to track the performance of a mutual fund, market index, savings instrument, or other designated investment or portfolio of investments. Effective December 31, 2021, the Company closed the DC SERP to new participants and froze benefit accruals for active participants. The total amount due to participants under this plan is included in other liabilities on the Company’s Consolidated Balance Sheets. Deferred Compensation The Company sponsors four plans which allow for elective compensation deferrals by directors, former trustees, and certain senior-level employees. Each plan allows its participants to designate deemed investments for deferred amounts from certain options which include diversified choices, such as exchange traded funds and mutual funds. Portfolios with various risk profiles are available to participants with the approval of the Compensation Committee. The Company purchases and sells investments which track the deemed investment choices, so that it has available funds to meet its payment liabilities. Deferred amounts, adjusted for deemed investment performance, are paid at the time of a participant designated date or event, such as separation from service, death, or disability. The total amounts due to participants under these plans are included in other liabilities on the Company’s Consolidated Balance Sheets. Employee Stock Ownership Plan (“ESOP”) Unallocated ESOP shares are shown as a reduction of equity and are presented in the Consolidated Statements of Shareholders’ Equity as unallocated common stock held by ESOP. Compensation expense for the Company’s ESOP is recorded at an amount equal to the shares committed to be allocated by the ESOP multiplied by the average fair market value of the shares during the year. The Company recognizes compensation expense ratably over the year based upon the Company’s estimate of the number of shares committed to be allocated by the ESOP. When the shares are committed to be released, unallocated common stock held by ESOP is reduced by the cost of the ESOP shares released and the difference between the average fair market value and the cost of the shares committed to be allocated by the ESOP is recorded as an adjustment to additional paid-in capital. The Company’s ESOP is classified as an internally leveraged plan as defined by ASC 718, “Compensation-Stock Compensation.” Accordingly, the loan receivable from the ESOP is not reported as an asset nor is the Company’s guarantee to fund the ESOP reported as a liability on the Company’s Consolidated Balance Sheet. Share-Based Compensation The Company measures share-based compensation on the grant date fair value on a straight-line basis over the vesting period during which an employee is required to provide services in exchange for the award; the requisite service period. The Company uses various pricing models to estimate the fair value of stock awards granted. The Company measures the fair value of the restricted stock using the closing market price of the Company’s common stock on the date of grant. The Company records compensation expense equal to the grant date fair value of the Company’s restricted stock with a corresponding increase in equity. Reductions in compensation expense associated with forfeited awards are accounted for as incurred. Upon vesting, the tax effect of the difference between the fair value of the award and the recorded expense is recognized as a component of income tax expense. Refer to Note 16, “Share-Based Compensation” for additional information regarding the Company’s share-based compensation plan. Variable Interest Entities (“VIE”) and Voting Interest Entities (“VOE”) The Company is involved in the normal course of business with various types of special purpose entities, some of which meet the definition for VIEs and VOEs. VIEs are entities that possess any of the following characteristics: 1) the total equity investment at risk is insufficient to permit the legal entity to finance its activities without additional subordinated financial support from other parties; 2) as a group, the holders of the equity investment at risk lack any of the characteristics of a controlling financial interest; or 3) the equity investors’ voting rights are not proportional to the economics, and substantially all of the activities of the entity either involve or are conducted on behalf of an investor that has disproportionately few voting rights. The Company consolidates entities deemed to be VIEs when it, or a wholly-owned subsidiary, is determined to be the primary beneficiary. The primary beneficiary analysis is a qualitative analysis based on power and economics. An enterprise has a controlling financial interest in a VIE if it has both 1) the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and 2) the obligation to absorb losses of the VIE that potentially could be significant to the VIE or the right to receive benefits from the VIE that potentially could be significant to the VIE. VOEs are entities in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make decisions about the entity’s activities. The Company generally consolidates VOEs when it, or a wholly-owned subsidiary, holds the majority of the voting interest in the VOE. Rabbi Trusts The Company established rabbi trusts to meet its obligations under certain executive non-qualified retirement benefits and deferred compensation plans and to mitigate the expense volatility of the aforementioned retirement plans. The rabbi trusts are considered VIEs as the equity investment at risk is insufficient to permit the trust to finance its activities without additional subordinated financial support from the Company. The Company is considered the primary beneficiary of the rabbi trusts as it has the power to direct the activities of the rabbi trusts that significantly affect the rabbi trust’s economic performance and it has the obligation to absorb losses of the rabbi trusts that could potentially be significant to the rabbi trusts by virtue of its contingent call options on the rabbi trust’s assets in the event of the Company’s bankruptcy. As the primary beneficiary of these VIEs, the Company consolidates the rabbi trust investments. In general, the rabbi trust investments and any earnings received thereon are accumulated, reinvested and used exclusively for trust purposes. These rabbi trust investments consist primarily of cash and cash equivalents, U.S. government agency obligations, equity securities, mutual funds and other exchange-traded funds, and are recorded at fair value in the Company’s Consolidated Balance Sheets. Changes in fair value are recorded in noninterest income in the Consolidated Statements of Income. These rabbi trust assets are included within other assets in the Company’s Consolidated Balance Sheets. Bank Owned Life Insurance The Company holds bank-owned life insurance on the lives of certain participating executives, primarily as a result of mergers and acquisitions. The amount reported as an asset on the Consolidated Balance Sheets is the sum of the cash surrender values reported to the Company by the various insurance carriers. Certain policies are split-dollar life insurance policies whereby the Company recognizes a liability for the postretirement benefit related to the arrangement. This postretirement benefit is included in other liabilities on the Consolidated Balance Sheets. Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are established for the temporary differences between the accounting basis and the tax basis of the Company’s assets and liabilities at enacted tax rates expected to be in effect when the amounts related to such temporary differences are realized or settled. A valuation allowance is established if it is considered more-likely-than-not that all or a portion of the deferred tax assets will not be realized. Interest and penalties paid on the underpayment of income taxes are classified as income tax expense. The Company periodically evaluates the potential uncertainty of its tax positions as to whether it is more-likely than-not its position would be upheld upon examination by the appropriate taxing authority. A tax position that meets the more-likely-than-not recognition threshold is measured to determine the amount of benefit to recognize in the Consolidated Financial Statements. The tax position is measured at the largest amount of benefit that management believes is greater than 50% likely of being realized upon settlement. Low Income Housing Tax Credits and Other Tax Credit Investments As part of its community reinvestment initiatives, the Company primarily invests in qualified affordable housing projects in addition to other tax credit investment projects. The Company receives low-income housing tax credits, investment tax credits, rehabilitation tax credits, solar tax credits and other tax credits as a result of its investments in these limited partnership investments. The Company accounts for its investments in qualified affordable housing projects using the proportional amortization method and amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits allocated to the Company. The amortization of the excess of the carrying amount of the investment over its estimated residual value is included as a component of income tax expense. At investment inception, the Company records a liability for the committed amount of the investment; this liability is reduced as contributions are made. The Company evaluates investments in tax credit investment companies for consolidation based on the variable or voting interest entity guidance, as appropriate. Other tax credit investment projects are accounted for using either the cost method or equity method. Trust Operations The Bank is a full-service trust company that provides a wide range of trust services to customers that includes managing customer investments, safekeeping customer assets, supplying disbursement services, and providing other fiduciary services. Trust assets held in a fiduciary or agency capacity for customers are not included in the accompanying Consolidated Balance Sheets as they are not assets of the Company. The fees charged are variable based on various factors such as the Company’s responsibility, the type of account, and account size. Customers are also charged a base fee which is prorated over a twelve-month period. Fees for additional or special services are generally fixed in nature and are charged as services are rendered. Revenue from administrative and management activities associated with these assets is recognized as performance obligations of underlying agreements are satisfied. Derivative Financial Instruments Derivative instruments are carried at fair value in the Company’s Consolidated Financial Statements. The accounting for changes in the fair value of a derivative instrument is determined by whether it has been designated and qualifies as part of a hedging relationship, and further, by the type of hedging relationship. At the inception of a hedge, the Company documents certain items, including, but not limited to, the following: the relationship between hedging instruments and hedged items, the Company’s risk management objectives, hedging strategies, and the evaluation of hedge transaction effectiveness. Documentation includes linking all derivatives that are designated as hedges to specific assets or liabilities on the balance sheet or to specific forecasted transactions. The Company’s derivative instruments that are designated and qualify for hedge accounting are classified as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows associated with a recognized asset or liability, or a forecasted transaction). As such, changes in the fair value of the designated hedging instrument that is included in the assessment of hedge effectiveness are recorded in other comprehensive income and reclassified into net income in the same period or periods during which the hedged forecasted transaction affects net income. Such reclassifications are presented in the same income statement line item as the net income effect of the hedged item. If the hedging instrument is not highly effective at achieving offsetting cash flows attributable to the revised contractually specified interest rate(s), hedge accounting will be discontinued. At that time, accumulated other comprehensive income would be frozen and amortized, as long as the forecasted transactions are still probable of occurring. If a cash flow hedge is terminated, hedge accounting treatment would be retained, and accumulated other comprehensive income would be frozen and amortized, as long as the forecasted transactions are still probable of occurring. The Company’s derivative instruments not designated as hedging instruments are recorded at fair value and changes in fair value are recognized in other noninterest income. Derivative instruments not designated as hedging instruments include interest rate swaps, foreign exchange contracts offered to commercial customers to assist them in meeting their financing and investing objectives for their risk management purposes, and risk participation agreements entered into as financial guarantees of performance on customer-related interest rate swap derivatives. The interest rate and foreign exchange risks associated with customer interest rate swaps and foreign exchange contracts are mitigated by entering into similar derivatives having offsetting terms with correspondent bank counterparties. All derivative financial instruments eligible for clearing are cleared through the Chicago Mercantile Exchange (“CME”). In accordance with its amended rulebook, CME legally characterizes variation margin payments made to and received from the CME as settlement of derivatives rather than as collateral against derivatives. Fair Value Measurements ASC 820 “Fair Value Measurements and Disclosures” (“ASC 820”) defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date. Market participants are buyers and sellers in the principal market that are independent, knowledgeable, able and willing to transact. ASC 820 also establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements), and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below: Level 1 – Inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 – Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly. Level 3 – Prices or valuations that require unobservable inputs that reflect the Company’s own assumptions that are significant to the fair value measurement. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Leases The Company leases certain office space and equipment under various non-cancelable operating leases, some of which have renewal options to extend lease terms. At lease inception, the Company evaluates the lease terms to determine if the lease should be classified as an operating lease or a finance lease and recognizes a right of use (“ROU”) asset and corresponding lease liability. The Company makes the decision on whether to renew an option to extend a lease by considering various factors. The Company will recognize an adjustment to its ROU asset and lease liability when lease agreements are amended and executed. The discount rate used in determining the present value of lease payments is based on the Company’s incremental borrowing rate for borrowings with terms similar to each lease at commencement date. The Company has lease agreements with lease and non-lease components, which are generally accounted for as a single lease component. The Company has elected the short-term lease recognition exemption for all leases that qualify. Common Share Repurchases Shares repurchased by the Company under the Company’s share repurchase programs have been classified as authorized but unissued shares. The cost of shares repurchased by the Company has been accounted for as a reduction to common stock and additional paid in capital balances. Massachusetts state law calls for repurchased shares to be classified as authorized but unissued shares. U.S. GAAP states that the accounting for share repurchases shall conform to state law where applicable. Earnings Per Share Basic earnings per share represents income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Unallocated ESOP shares are not deemed outstanding for earnings per share calculations. ESOP shares committed to be released are considered to be outstanding for purposes of the earnings per share computation. ESOP shares that have not been legally released, but that relate to employee services rendered during an accounting period (interim or annual) ending before the related debt service payment is made, are considered committed to be released. Diluted earnings per share reflects additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Company relate to outstanding stock awards and are determined using the treasury stock method. Segment Reporting An operating segment is defined as a component of a business for which separate financial information is available that is evaluated regularly by the chief operating decision-maker (“CODM”) in deciding how to allocate resources and evaluate performance. The Company has determined that its CODM is its Executive Chair. The Company has one reportable segment: its banking business, which consists of a full range of banking lending, savings, and small business offerings, and its wealth management and trust operations. Recent Accounting Pronouncements Relevant standards that were recently issued but not yet adopted as of December 31, 2025: In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements–Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative (“ASU 2023-06”). The amendments in this update modify the disclosure or presentation requirements for a variety of topics in the codification. Certain amendments represent clarifications to or technical corrections of the current requirements. The following is a summary of the topics included in the update and which pertain to the Company: 1.Statement of cash flows (Topic 230): Requires an accounting policy disclosure in annual periods of where cash flows associated with derivative instruments and their related gains and loses are presented in the statement of cash flows; 2.Accounting changes and error corrections (Topic 250): Requires that when there has been a change in the reporting entity, the entity disclose any material prior-period adjustment and the effect of the adjustment on retained earnings in interim financial statements; 3.Earnings per share (Topic 260): Requires disclosure of the methods used in the diluted earnings-per-share computation for each dilutive security and clarifies that certain disclosures should be made during interim periods, and amends illustrative guidance to illustrate disclosure of the methods used in the diluted earnings per share computation; 4.Commitments (Topic 440): Requires disclosure of assets mortgaged, pledged, or otherwise subject to lien and the obligations collateralized; and 5.Debt (Topic 470): Requires disclosure of amounts and terms of unused lines of credit and unfunded commitments and the weighted-average interest rate on outstanding short-term borrowings. For public business entities, the amendments in ASU 2023-06 are effective on the date which the SEC’s removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective. If by June 30, 2027, the SEC has not removed the applicable requirement from Regulation and S-X or Regulation S-K, the pending content of the related amendment will be removed from the codification and will not become effective for any entity. Early adoption is not permitted and the amendments are required to be applied on a prospective basis. The Company expects the adoption of this standard will not have a material impact on its Consolidated Financial Statements. In November 2024, the FASB issued ASU 2024-03, Income Statement–Reporting Comprehensive Income–Expense Disaggregation Disclosures (Subtopic 220-40). The amendments in this update require disclosure, in the notes to the financial statements, of specified information about certain costs and expenses. The amendments require that at each interim and annual reporting period an entity: 1.Disclose the amounts of (a) purchases of inventory, (b) employee compensation, (c) depreciation, (d) intangible asset amortization, and (e) depreciation, depletion, and amortization recognized as part of oil and gas-producing activities (or other amounts of depletion expense) included in each relevant expense caption. A relevant expense caption is an expense caption presented on the face of the income statement within continuing operations that contains any of the expense categories listed in (a)–(e). 2.Include certain amounts that are already required to be disclosed under current GAAP in the same disclosure as the other disaggregation requirements. 3.Disclose a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively. 4.Disclose the total amount of selling expenses and, in annual reporting periods, an entity’s definition of selling expenses. For public business entities, the amendments in ASU 2024-03 are effective for annual periods beginning after December 15, 2026 and interim periods beginning after December 15, 2027. Early adoption is permitted. The amendments in this update are to be applied either (1) prospectively to financial statements issued for reporting periods after the effective date of this update or (2) retrospectively to any or all prior periods presented in the financial statements. The Company expects the adoption of this standard will not have a material impact on its Consolidated Financial Statements. In April 2025, the FASB issued ASU 2025-03, Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer of a Variable Interest Entity. The amendments in this update are intended to improve the requirements for identifying the accounting acquirer in Topic 805, Business Combinations. The amendments in this update differ from current generally accepted accounting principles because, for certain transactions, they replace the requirement that the primary beneficiary always is the acquirer with an assessment that requires an entity to consider the factors to determine which entity is the accounting acquirer. The amendments in this update enhance the comparability of financial statements across entities engaging in acquisition transactions effected primarily by exchanging equity interests when the legal acquiree meets the definition of a business. Specifically, under the amendments, acquisition transactions in which the legal acquiree is a variable interest entity will, in more instances, result in the same accounting outcomes as economically similar transactions in which the legal acquiree is a voting interest entity. The amendments in this update do not change the accounting for a transaction determined to be a reverse acquisition or a transaction in which the legal acquirer is not a business and is determined to be the accounting acquiree. For public business entities, the amendments in ASU 2025-03 are effective for annual periods beginning after December 15, 2026 and interim periods within those annual periods. Adoption should be done on a prospective basis. Early adoption is permitted as of the beginning of an interim or annual reporting period. The Company does not expect the adoption of this standard will have a material impact on its Consolidated Financial Statements. In November 2025, the FASB issued ASU 2025-09, Derivatives and Hedging (Topic 815): Hedge Accounting Improvements. The amendments in this update help clarify and refine hedge accounting requirements, including clarifications to documentation and designation in regards to hedge relationships. The update introduces improvements to hedge accounting to better align financial reporting with the economic results of an entity's risk management activities. Early adoption is permitted. For public business entites, the amendments in this update are effective for annual reporting periods beginning after December 15, 2026, and interim periods within those annual reporting periods. The Company does not expect the adoption of this standard to have a material impact on its Consolidated Financial Statements. In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. The amendments in this update clarify interim disclosure requirements and the applicability of Topic 270. The amendments in this update result in a comprehensive list of interim disclosures that are required by GAAP. In developing the list of disclosures required by other Topics, the Board focused on identifying the interim disclosures that are currently required under GAAP. The objective of the amendments is to provide clarity about the current requirements, rather than evaluate whether to expand or reduce interim disclosure requirements. The amendments in this update also include a disclosure principle that requires entities to disclose events since the end of the last annual reporting period that have a material impact on the entity. The intent of the disclosure principle, which is modeled after a previous SEC disclosure requirement, is to help entities determine whether disclosures not specified in Topic 270 should be provided in interim reporting periods. The amendments in this update also clarify the applicability of Topic 270, the types of interim reporting, and the form and content of interim financial statements in accordance with GAAP. For public business entities, the amendments in ASU 2025-11 are effective for interim reporting periods within annual reporting periods beginning after December 15, 2027. Adoption can be applied either prospectively or retrospectively to any or all prior periods presented in the financial statements. Early adoption is permitted. The Company does not expect the adoption of this standard will have a material impact on its Consolidated Financial Statements. Relevant standards that were adopted during the year ended December 31, 2025: In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in this update are intended to improve income tax disclosure requirements, primarily through enhanced disclosures related to the existing requirements to disclose a rate reconciliation, income taxes paid and certain other required disclosures. Specifically, the amendments in this update: 1.Require that a public entity disclose, on an annual basis: (1) specific categories in the rate reconciliation and (2) additional information for reconciling items that meet a quantitative threshold. The update requires disclosure of such reconciling items according to requirements indicated in the update. 2.Require that all entities disclose certain disaggregated information regarding income taxes paid. 3.Require that all entities disclose certain disaggregated information regarding income tax expense. 4.Eliminate the requirement to: (1) disclose the nature and estimate of the range of reasonably possible changes in the unrecognized tax benefits balance in the next 12 months or (2) make a statement that an estimate of the range cannot be made. 5.Remove the requirement to disclose the cumulative amount of each type of temporary difference when a deferred tax liability is not recognized because of exceptions to comprehensive recognition of deferred taxes related to subsidiaries and corporate joint ventures. For public business entities, the amendments in ASU 2023-09 are effective for annual periods beginning after December 15, 2024. Adoption should be done on a prospective basis and retrospective application is permitted. The adoption of this standard did not have a material impact on the Company’s Consolidated Financial Statements. In August 2025, the FASB issued ASU 2025-05, Financial Instrument- Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets. The amendments in this update provide for the following when estimating expected credit losses for current accounts receivable and current contract assets arising from transactions accounted for under Topic 606, Revenue from Contracts with Customers: 1.In developing reasonable and supportable forecasts as part of estimating expected credit losses, all entities may elect a practical expedient that assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. 2.An entity other than a public business entity that elects the practical expedient is permitted to make an accounting policy election to consider collection activity after the balance sheet date when estimating expected credit losses. The adoption of this standard did not have a material impact on the Company’s Consolidated Financial Statements. In November 2025, the FASB issued ASU 2025-08, Financial Instrument- Credit Losses (Topic 326): Purchased Loans. The amendments in this update expand the population of acquired financial assets subject to the gross-up approach in Topic 326, Financial Instrument- Credit Losses. In accordance with the amendments in this update, loans (excluding credit cards) acquired without credit deterioration and deemed “seasoned” (defined below) are purchased seasoned loans and accounted for using the gross-up approach at acquisition. Specifically, after an entity determines that a loan is a non-PCD asset based on its assessment of credit deterioration experienced since origination, the entity should apply the guidance described in the amendments to determine whether the loan is seasoned and, therefore, should be accounted for using the gross-up approach. All non-PCD loans (excluding credit cards) that are acquired in a business combination are deemed seasoned. Other non-PCD loans (excluding credit cards) are seasoned if they were purchased at least 90 days after origination and the acquirer was not involved in the origination of the loans. The Company elected to early-adopt this ASU and applied the amendments to loans acquired in our merger with HarborOne. Refer to Note 3, “Mergers and Acquisitions” within the Notes to the Consolidated Financial Statements included in Part II, Item 8 in this Annual Report on Form 10-K for further information including the initial allowance for loan losses recognized on purchased seasoned loans acquired in the merger.
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Mergers and Acquisitions |
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| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mergers and Acquisitions | Mergers and Acquisitions HarborOne Bancorp, Inc. Merger On November 1, 2025, the Company completed its merger with HarborOne. In accordance with the merger agreement, each share of HarborOne common stock, at the holder’s election, was exchanged for either (i) 0.765 shares of Company common stock and cash in lieu of any fractional share or (ii) $12.00 in cash, which was subject to allocation procedures to ensure that the total number of shares of HarborOne common stock that received the stock consideration represented between 75% and 85% of the total number of shares of HarborOne common stock outstanding immediately prior to the completion of the merger. The transaction qualified as a tax-free reorganization for federal income tax purposes and provided HarborOne shareholders with a tax-free exchange of their shares of HarborOne common stock for Company common stock as the consideration they received in the merger. Immediately following, HarborOne Bank, a wholly owned subsidiary of HarborOne, merged with and into Eastern Bank, with Eastern Bank continuing as the surviving entity. The Company issued 26.9 million shares of its common stock in the merger and paid aggregate cash consideration of $74.6 million. Based upon the closing price of Company common stock on October 31, 2025 of $17.53 per share and cash consideration paid, the transaction is valued at $550.1 million. In addition to increasing its loan and deposit base, the merger enabled the Company to expand its customer base in Rhode Island and its presence in the Greater Boston area. The merger was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. Under this method of accounting, the respective assets acquired and liabilities assumed were recorded at their estimated fair values. The excess of consideration paid over the estimated fair value of the net assets acquired totaled $202.2 million and was recorded as goodwill. The results of HarborOne’s operations were included in the Company’s consolidated financial statements subsequent to the merger date. The calculation of goodwill is subject to change for up to one year after the closing date of the transaction as additional information relative to closing date estimates and uncertainties becomes available, including the filing of the 2025 tax return for HarborOne. As the Company finalizes its analysis of these assets and liabilities, there may be adjustments to the recorded carrying values. The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of merger from HarborOne:
(1)Includes certificates of deposit, at fair value, of $1.4 billion. Fair Value Measurement of Assets Assumed and Liabilities Assumed The methods used to determine the fair value of the assets acquired and liabilities assumed in the HarborOne merger were as follows: Investment Securities The estimated fair values of the available for sale debt securities and held-to-maturity debt securities, primarily comprised of U.S. Government Sponsored Enterprises mortgage-backed securities, U.S. Government Sponsored Enterprises obligations and Small Business Administration (“SBA”) asset-backed securities carried on HarborOne’s balance sheet, was confirmed using actual sales quotations from sales of the securities, as the Company sold substantially all of the acquired securities, with the exception of two corporate bonds, immediately following the closing of the merger. The fair value of the corporate bonds not sold immediately following the closing of the merger, was determined using matrix pricing with observable market inputs. Based upon management’s determination, a fair value adjustment of less than $0.1 million, reflecting a net premium, was recorded on acquired securities and reflects the net unrealized loss position of such securities at the date of merger. Securities acquired that were classified on HarborOne’s balance sheet as held-to-maturity were reclassified as available for sale upon the completion of the merger and prior to sale by the Company, reflecting management’s intent with respect to such securities. Immediately following the completion of the merger, substantially all of the investment securities acquired through its merger with HarborOne were sold. No gain or loss was recognized upon sale as such securities had been recorded by the Company based upon the quoted sale prices in determination of the purchase accounting fair value adjustment. Loans Loans acquired in the HarborOne merger were recorded at fair value, and there was no carryover of the allowance for loan losses. The fair value of the loans acquired from HarborOne was determined using market participant assumptions in estimating the amount and timing of both principal and interest cash flows expected to be collected, as adjusted for an estimate of future credit losses and prepayments, and then applying a market-based discount rate to those cash flows. Management retained a third-party valuation specialist to assist with the determination of fair values of loans acquired, the results of which were reviewed by management. The resulting total fair value mark was estimated to be a discount of $249.4 million, which includes the fair value mark on assumed unfunded loan commitments of $2.9 million. Acquired loans were reviewed to determine if any had experienced a more-than-insignificant deterioration in credit quality since origination. Loans meeting established criteria to indicate more-than-insignificant deterioration were identified as PCD loans. All other acquired loans were determined to be PSL’s. An allowance for loan losses was calculated for the acquired loans using management’s best estimate of projected losses over the remaining life of the loan in accordance with CECL methodology. In connection with the HarborOne merger, the Company recorded an allowance for loan losses on PCD loans and PSL’s of $61.2 million and $42.6 million, respectively, which was added to the amortized cost of loans. The following is a reconciliation of the difference between the purchase price and par value of PCD loans acquired in the merger:
Premises and Equipment The Company acquired 30 branches in the merger as of the date of closing, 14 of which were owned premises. In addition, the Company acquired 16 corporate properties in the merger with HarborOne. The fair value of properties acquired was derived by valuations prepared by an independent third party utilizing a combination of the income approach and the sales comparison approach to value the property as improved. Leases As part of the merger the Company added 30 lease obligations. The Company recorded a $10.5 million right-of-use asset and corresponding lease liability for these lease obligations. Lease assets and liabilities were measured using a methodology to estimate the future rental payments over the remaining lease term with discounting using the Company’s incremental borrowing rate. The lease term was determined for individual leases based on the Company’s assessment of the probability of exercising renewal options. The net effect of any off-market terms in a lease was also discounted and applied to the balance of the lease asset. Core Deposit Intangible The fair value of the core deposit intangible was determined based on a discounted cash flow analysis using a discount rate commensurate with market participants. To calculate cash flows, deposit account servicing costs (net of deposit fee income) and interest expense on deposits were compared to the cost of alternative funding sources available through FHLBB borrowing rates and national brokered CD offering rates. The projected cash flows were developed using projected deposit attrition rates. Management retained a third-party valuation specialist to assist with the determination of projected cash flows, the results of which were reviewed by management. The core deposit intangible totaled $82.8 million and is being amortized on a cash-flow weighted basis over its estimated useful life of 7 years. Goodwill The calculation of goodwill is subject to change for up to one year after the date of merger as additional information relative to the closing date estimates and uncertainties become available. As the Company finalizes its review of the acquired assets and liabilities, certain adjustments to the recorded carrying values may be required. The goodwill will be evaluated annually for impairment. The goodwill is not deductible for tax purposes. Bank Owned Life Insurance (“BOLI”) HarborOne’s BOLI cash surrender value was $98.8 million with no fair value adjustment. Certificates of Deposit The fair value adjustment for certificates of deposit represents a premium from the value of the contractual repayments of fixed-maturity deposits using prevailing market interest rates for similar-term time deposits. The certificate of deposit premium, which was estimated to be $2.7 million, is being amortized into income on a level yield amortization method over the contractual life of the deposits. FHLB Advances The fair value adjustment for FHLB advances represents a premium from the stated interest rates on the advances that are above current market interest rates. The FHLB advances premium, which was estimated to be $2.5 million, is being amortized into income using the effective interest method over the life of the advances. Merger-Related Expenses The Company recorded merger and acquisition expenses of $35.7 million during the year ended December 31, 2025 related to the HarborOne merger. There were no merger and acquisitions related to the HarborOne merger during the year ended December 31, 2024. The following table presents HarborOne-related merger and acquisition costs by expense category, which are included in non-operating expenses on the Consolidated Statements of Income, for the year ended December 31, 2025:
The following table presents certain unaudited pro forma information for the years ended December 31, 2025 and 2024. This unaudited estimated pro forma financial information was calculated as if the merger had occurred as of January 1, 2024. This unaudited pro forma information combines the historical results of HarborOne with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the merger occurred as of the beginning of the year prior to the merger. The unaudited pro forma information does not consider any changes to the provision for loan losses resulting from recording loan assets at fair value, cost savings, or business synergies. As a result, actual amounts would have differed from the unaudited pro forma information presented.
Financial results of HarborOne from the date of merger through December 31, 2025 are not presented as management considers the determination of such amounts to be impracticable. Cambridge Bancorp, Inc. Merger On July 12, 2024, the Company completed its merger with Cambridge. In accordance with the merger agreement, each share of Cambridge common stock was exchanged for 4.956 shares of Company common stock. The transaction qualified as a tax-free reorganization for federal income tax purposes and provided Cambridge shareholders with a tax-free exchange of their shares of Cambridge common stock for Company common stock as the consideration they received in the merger. In connection with the merger, Citadel MS 2023, Inc. (“Merger Sub”), a wholly-owned subsidiary of the Company, merged with and into Cambridge, with Cambridge continuing as the surviving entity. Immediately after the merger, Cambridge merged with and into the Company, with the Company continuing as the surviving entity. Immediately following, Cambridge Trust, a wholly owned subsidiary of Cambridge, merged with and into Eastern Bank, with Eastern Bank continuing as the surviving entity. The Company issued 38.9 million shares of its common stock in the merger. Based upon the closing price of Company common stock on July 12, 2024 of $14.87 per share, the transaction is valued at $580.6 million, which includes cash paid in-lieu of fractional shares and recognition of restricted stock units (“RSU”) and performance share units (“PSU”) service accruals for service accrued by Cambridge personnel prior to the merger. In addition to increasing its loan and deposit base, the merger enabled the Company to expand its wealth management customer base and service offerings, which includes comprehensive investment management, as well as trust administration, estate settlement, and financial planning services. The merger was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. Under this method of accounting, the respective assets acquired and liabilities assumed were recorded at their estimated fair values. The excess of consideration paid over the estimated fair value of the net assets acquired totaled $357.3 million and was recorded as goodwill. The results of Cambridge’s operations were included in the Company’s consolidated financial statements subsequent to the merger date. The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of merger from Cambridge:
(1)Includes certificates of deposit, at fair value, of $418.7 million. (2)The FHLB advances assumed were overnight borrowings which matured immediately following the completion of the merger and therefore were not adjusted to fair value. Fair Value Measurement of Assets Assumed and Liabilities Assumed The methods used to determine the fair value of the assets acquired and liabilities assumed in the Cambridge merger were as follows: Investment Securities The estimated fair values of the available for sale debt securities and held-to-maturity debt securities, primarily comprised of U.S. Government Sponsored Enterprises mortgage-backed securities, U.S. Government Sponsored Enterprises obligations, corporate debt securities, municipal securities, and U.S. Treasury securities carried on Cambridge’s balance sheet, was confirmed using actual sales quotations from sales of the securities, as the Company sold all of the acquired securities immediately following the closing of the merger. Based upon management’s determination, a fair value adjustment of $158.9 million, reflecting a net discount, was recorded on acquired securities and reflects the net unrealized loss position of such securities at the date of merger. Securities acquired that were classified on Cambridge’s balance sheet as held-to-maturity were reclassified as available for sale upon the completion of the merger and prior to sale by the Company, reflecting management’s intent with respect to such securities. Immediately following the completion of the merger, investment securities acquired through its merger with Cambridge paid down or were sold in their entirety. No gain or loss was recognized upon sale as such securities had been recorded by the Company based upon the quoted sale prices in determination of the purchase accounting fair value adjustment. Loans Loans acquired in the Cambridge merger were recorded at fair value, and there was no carryover of the allowance for loan losses. The fair value of the loans acquired from Cambridge was determined using market participant assumptions in estimating the amount and timing of both principal and interest cash flows expected to be collected, as adjusted for an estimate of future credit losses and prepayments, and then applying a market-based discount rate to those cash flows. Management retained a third-party valuation specialist to assist with the determination of fair values of loans acquired, the results of which were reviewed by management. The resulting total fair value mark was estimated to be a discount of $277.0 million. Acquired loans were reviewed to determine if any had experienced a more-than-insignificant deterioration in credit quality since origination. Loans meeting established criteria to indicate more-than-insignificant deterioration were identified as PCD loans, and an allowance for loan losses was calculated using management’s best estimate of projected losses over the remaining life of the loan in accordance with CECL methodology. In connection with the Cambridge merger, the Company recorded an allowance for loan losses on PCD loans of approximately $55.8 million, which was added to the amortized cost of loans. The following is a reconciliation of the difference between the purchase price and par value of PCD loans acquired in the merger:
For loans acquired without evidence of more-than-insignificant deterioration in credit quality since origination, also referred to as non-PCD loans, the Company estimated an allowance for loan losses based on the Company's methodology for determining the allowance under CECL. The resulting allowance on non-PCD loans was $40.9 million, which was recorded through a charge to provision for loan losses on the date of merger. Premises and Equipment The Company acquired 18 branches in the merger as of the date of closing, five of which were owned premises. In addition, the Company acquired two corporate properties in the merger with Cambridge. The fair value of properties acquired was derived by valuations prepared by an independent third party utilizing a combination of the income approach and the sales comparison approach to value the property as improved. Leases As part of the merger the Company added 23 lease obligations. The Company recorded a $25.5 million right-of-use asset and a $32.0 million lease liability for these lease obligations. Lease assets and liabilities were measured using a methodology to estimate the future rental payments over the remaining lease term with discounting using the Company’s incremental borrowing rate. The lease term was determined for individual leases based on the Company’s assessment of the probability of exercising renewal options. The net effect of any off-market terms in a lease was also discounted and applied to the balance of the lease asset. Core Deposit Intangible The fair value of the core deposit intangible was determined based on a discounted cash flow analysis using a discount rate commensurate with market participants. To calculate cash flows, deposit account servicing costs (net of deposit fee income) and interest expense on deposits were compared to the cost of alternative funding sources available through FHLBB borrowing rates and national brokered CD offering rates. The projected cash flows were developed using projected deposit attrition rates. Management retained a third-party valuation specialist to assist with the determination of projected cash flows, the results of which were reviewed by management. The core deposit intangible totaled $115.0 million and is being amortized on a cash-flow weighted basis over its estimated useful life of 7 years. Cambridge Trust Wealth Management Customer List and Trade Name Intangibles The fair value of the Cambridge Trust wealth management customer list intangible (“customer list intangible”) and trade name intangible (“trade name intangible”) were determined based upon discounted cash flow analyses using discount rates commensurate with market participants. The projected cash flows for the customer list intangible were developed using current revenue grown at a constant rate, and projected customer attrition rates were used to allocate those revenues to existing customers. Adjustments were made to the projected cash flows to account for sales and marketing expenses as well as contributory asset charges associated with the customer list. The discounted cash flows for the trade name intangible were developed using current revenue grown at a constant rate, multiplied by a royalty rate determined based on market observations. Management retained a third-party valuation specialist to assist with the determination of the projected cash flows, the results of which were reviewed by management. The estimated fair value of the customer list and trade name intangibles amounted to $25.0 million and $1.2 million, respectively, and are being amortized on a cash-flow weighted basis over their estimated useful lives of 11 years and 5 years, respectively. Goodwill The calculation of goodwill is subject to change for up to one year after the date of merger as additional information relative to the closing date estimates and uncertainties become available. As the Company finalizes its review of the acquired assets and liabilities, certain adjustments to the recorded carrying values may be required. The goodwill will be evaluated annually for impairment. The goodwill is not deductible for tax purposes. Bank Owned Life Insurance (“BOLI”) Cambridge’s BOLI cash surrender value was $35.7 million with no fair value adjustment. Certificates of Deposit The fair value adjustment for certificates of deposit represents a discount from the value of the contractual repayments of fixed-maturity deposits using prevailing market interest rates for similar-term time deposits. The certificate of deposit discount, which was estimated to be $1.6 million, is being amortized into income on a level yield amortization method over the contractual life of the deposits. Merger-Related Expenses The Company recorded merger and acquisition expenses of $36.7 million and $5.5 million during the years ended December 31, 2024 and 2023, respectively, related to the Cambridge merger. These merger and acquisition expenses are included in non-operating expenses within the Consolidated Statements of Income and include the following:
The following table presents certain unaudited pro forma information for the years ended December 31, 2024 and 2023. This unaudited estimated pro forma financial information was calculated as if the merger had occurred as of January 1, 2023. This unaudited pro forma information combines the historical results of Cambridge with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the merger occurred as of the beginning of the year prior to the merger. The unaudited pro forma information does not consider any changes to the provision for loan losses resulting from recording loan assets at fair value, cost savings, or business synergies. As a result, actual amounts would have differed from the unaudited pro forma information presented.
Financial results of Cambridge from the date of merger through year ended December 31, 2024 are not presented as management considers the determination of such amounts to be impracticable.
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| Debt Securities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Securities | Securities Available for Sale Securities The amortized cost, gross unrealized gains and losses, allowance for credit losses (“ACL”) and fair value of AFS securities as of the dates indicated were as follows:
The Company did not record a provision for credit losses on any AFS securities during either the year ended December 31, 2025 or 2024. Accrued interest receivable on AFS securities totaled $11.9 million and $8.9 million as of December 31, 2025 and 2024, respectively, and is included within on the Consolidated Balance Sheets. The Company did not record any write-offs of accrued interest income on AFS securities during either the year ended December 31, 2025 or 2024. No securities held by the Company were delinquent on contractual payments as of December 31, 2025 or 2024, nor were any such securities placed on non-accrual status during the periods then ended. As of December 31, 2025 and 2024, the Company had no investments in obligations of individual states, counties, or municipalities which exceeded 10% of consolidated shareholders’ equity. The following table summarizes gross realized gains and losses from sales of AFS securities for the periods indicated:
Information pertaining to AFS securities with gross unrealized losses as of December 31, 2025 and 2024, for which the Company did not recognize a provision for credit losses under CECL, aggregated by investment category and length of time that individual securities had been in a continuous loss position, is as follows:
As of December 31, 2025, the Company did not intend to sell these investments and has determined based upon available evidence that it is more-likely-than-not that the Company will not be required to sell each security before the expected recovery of its amortized cost basis. As a result, the Company did not recognize an ACL on these investments as of either December 31, 2025 or 2024. The causes of the impairments listed in the tables above by category are as follows as of December 31, 2025 and 2024: •Government-sponsored mortgage-backed securities, U.S. Agency bonds and U.S. Treasury securities – The securities with unrealized losses in these portfolios have contractual terms that generally do not permit the issuer to settle the security at a price less than the current par value of the investment. The decline in market value of these securities is attributable to changes in interest rates and not credit quality. Additionally, these securities are implicitly guaranteed by the U.S. government or one of its agencies. •State and municipal bonds and obligations – The securities with unrealized losses in this portfolio have contractual terms that generally do not permit the issuer to settle the security at a price less than the current par value of the investment. The decline in market value of these securities is attributable to changes in interest rates and not credit quality. Held to Maturity Securities The amortized cost, gross unrealized gains and losses, allowance for credit losses and fair value of HTM securities as of the dates indicated were as follows:
The Company did not record a provision for estimated credit losses on any HTM securities during either the year ended December 31, 2025 or 2024. As of December 31, 2025 and 2024, the accrued interest receivable on HTM securities totaled $3.6 million, and $0.9 million, respectively, and is included within on the Consolidated Balance Sheets. The Company did not record any write-offs of accrued interest receivable on HTM securities during either the year ended December 31, 2025 or 2024. No HTM securities held by the Company were delinquent on contractual payments as of either December 31, 2025 or 2024, nor were any such securities placed on non-accrual status during the periods then ended. Available for Sale and Held to Maturity Securities Contractual Maturity The amortized cost and estimated fair value of AFS and HTM securities by contractual maturities as of December 31, 2025 and 2024 are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties. The scheduled contractual maturities of AFS and HTM securities as of the dates indicated were as follows:
Mortgage-backed securities include investments in securities that are insured or guaranteed by Freddie Mac, Ginnie Mae or Fannie Mae. Mortgage-backed securities are purchased to achieve positive interest rate spread with minimal administrative expense, and to lower the Company’s credit risk. Mortgage-backed securities and callable securities are shown at their contractual maturity dates. However, both are expected to have shorter average lives due to expected prepayments and callable features, respectively. Included in the above maturity tables as of December 31, 2025 and 2024 were $385.5 million and $196.4 million, respectively, of callable securities at fair value. Securities Pledged as Collateral As of December 31, 2025 and 2024, securities with a carrying value of $692.9 million and $687.9 million, respectively, were pledged to secure public deposits and for other purposes required by law. As of December 31, 2025 and 2024, deposits with associated pledged collateral included cash accounts from the Company’s wealth management division (“Cambridge Trust Wealth Management”) and municipal deposit accounts. As of December 31, 2025 and 2024, securities with a carrying value of $0.2 billion and $1.0 billion, respectively, were pledged as collateral to the FHLBB. As of December 31, 2025 and 2024, securities with a carrying value of $414.2 million and $794.8 million, respectively, were pledged as collateral to the Federal Reserve Discount Window (the “Discount Window”).
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Mortgage Banking |
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| Transfers and Servicing [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mortgage Banking | Mortgage Banking The Company sells residential mortgages to government-sponsored entities and other parties. The Company retains no beneficial interests in these loans but may retain the servicing rights of the loans sold. Mortgage loans serviced for others are not included in the accompanying Consolidated Balance Sheets. The risks in MSRs relate primarily to changes in prepayments that generally result from shifts in mortgage interest rates. The unpaid principal balances of mortgage loans serviced for others were $3.3 billion and $228.4 million as of December 31, 2025 and December 31, 2024, respectively. The increase in the unpaid principal balances of mortgage loans serviced for others was due to the acquisition of HarborOne on November 1, 2025. The Company accounts for MSRs acquired in the acquisition of HarborOne at fair value, which amounted to $39.7 million at December 31, 2025, and accounts for its existing MSRs at amortized cost, which amounted to $1.4 million and $2.1 million at December 31, 2025 and 2024, respectively. The Company obtains and reviews valuations from an independent third party to determine the fair value of MSRs. Key assumptions used in the estimation of fair value include prepayment speeds, discount rates, and default rates. At December 31, 2025, the following weighted average assumptions were used in the calculation of fair value of MSRs:
The following summarizes changes to MSRs for the periods indicated:
(1)Includes MSRs acquired in our merger with HarborOne which amounted to $39.7 million as of November 1, 2025. The components of mortgage banking income were as follows for the periods indicated:
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Loans and Allowance for Credit Losses |
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| Receivables [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Loans and Allowance for Credit Losses | Loans and Allowance for Credit Losses Loans The following table provides a summary of the Company’s loan portfolio as of the dates indicated:
(1)The balance of accrued interest receivable excluded from amortized cost and the calculation of the allowance for loan losses amounted to $81.9 million and $66.7 million as of December 31, 2025 and 2024, respectively, and is included within other assets on the Consolidated Balance Sheets. There are no other loan categories that exceed 10% of total loans not already reflected in the preceding table. The Company’s lending activities are conducted principally in the New England area with the exception of its Shared National Credit Program (“SNC Program”) portfolio and certain purchased loans. The Company participates in the SNC Program in an effort to improve its industry and geographical diversification. The SNC Program portfolio is included in the Company’s commercial and industrial, commercial real estate and commercial construction portfolios. The SNC Program portfolio is defined as loan syndications with exposure over $100 million and with three or more lenders participating. Most loans originated by the Company are either collateralized by real estate or other assets or guaranteed by federal and local governmental authorities. The ability and willingness of the single-family residential and consumer borrowers to honor their repayment commitments is generally dependent on the level of overall economic activity within the borrowers’ geographic areas and real estate values. The ability and willingness of commercial real estate, commercial and industrial, and construction loan borrowers to honor their repayment commitments is generally dependent on the health of the real estate economy in the borrowers’ geographic areas and the general economy. Loans Pledged as Collateral The carrying value of loans pledged to secure advances from the FHLBB were $5.0 billion and $2.3 billion at December 31, 2025 and 2024, respectively. The balance of funds borrowed from the FHLBB were $199.6 million and $17.6 million at December 31, 2025 and 2024, respectively. The carrying value of loans pledged to secure advances from the Federal Reserve Bank (“FRB”) was $5.0 billion and $3.1 billion at December 31, 2025 and 2024, respectively. There were no funds borrowed from the FRB outstanding at either December 31, 2025 or 2024. Allowance for Loan Losses The allowance for loan losses is established to provide for management’s estimate of expected lifetime credit losses on loans measured at amortized cost at the balance sheet date through a provision for loan losses charged to net income. Charge-offs, net of recoveries, are charged directly to the allowance for loan losses. Commercial and residential loans are charged-off in the period in which they are deemed uncollectible. Delinquent loans in these product types are subject to ongoing review and analysis to determine if a charge-off in the current period is appropriate. For consumer loans, policies and procedures exist that require charge-off consideration upon a certain triggering event depending on the product type. The following tables summarize the change in the allowance for loan losses by loan category for the periods indicated:
(1)Represents the adjustment needed to reflect the cumulative day one impact pursuant to the Company’s adoption of ASU 2022-02 (i.e., cumulative effect adjustment related to the adoption of ASU 2022-02 as of January 1, 2023). The adjustment represents a $1.1 million decrease to the allowance attributable to the change in accounting methodology for estimating the allowance for loan losses resulting from the Company’s adoption of the standard. The decrease for the year ended December 31, 2025 from 2024 was primarily attributable to the initial provision for allowance for loan losses for acquired non-PCD loans of $40.9 million recorded by the Company in the year ended December 31, 2024 in connection with the Cambridge merger. The Company early-adopted ASU 2025-08 as of December 31, 2025 and applied provisions of the ASU in accounting for loans acquired in connection with the HarborOne merger. Therefore, no initial provision for allowance for loan losses was recorded during the year ended December 31, 2025 on acquired non-PCD loans (also referred to as “purchased seasoned loans”) as the initial allowance was recorded with a corresponding increase to the loan amortized cost balances. Refer to Note 2, “Summary of Significant Accounting Policies” for additional information regarding the Company's adoption of ASU 2025-08. Reserve for Unfunded Commitments Management evaluates the need for a reserve on unfunded lending commitments in a manner consistent with loans held for investment. As of December 31, 2025 and December 31, 2024, the Company’s reserve for unfunded lending commitments was $16.4 million and $13.1 million, respectively, which is recorded within other liabilities in the Company’s Consolidated Balance Sheets. Portfolio Segmentation Management uses a methodology to systematically estimate the amount of expected losses in each segment of loans in the Company’s portfolio. Commercial and industrial business banking, investment commercial real estate, and commercial and industrial loans are evaluated based upon loan-level risk characteristics, historical losses and other factors which form the basis for estimating expected losses. Other portfolios, including owner occupied commercial real estate (which includes business banking owner occupied commercial real estate), commercial construction, residential mortgages, home equity and consumer loans, are analyzed as groups taking into account delinquency ratios, and the Company’s and peer banks’ historical loss experience. For the purposes of estimating the allowance for loan losses, management segregates the loan portfolio into loan categories that share similar risk characteristics such as the purpose of the loan, repayment source, and collateral. These characteristics are considered when determining the appropriate level of the allowance for each category. Some examples of these risk characteristics unique to each loan category include: Commercial Lending Commercial and industrial: The primary risk associated with commercial and industrial loans is the ability of borrowers to achieve business results consistent with those projected at origination. Collateral frequently consists of a first lien position on business assets including, but not limited to, accounts receivable, inventory, aircraft and equipment. The primary repayment source is operating cash flow and, secondarily, the liquidation of assets. Under its lending guidelines, the Company generally requires a corporate or personal guarantee from any entity or individual that holds a material ownership in the borrowing entity when the loan-to-value of a commercial and industrial loan is in excess of a specified threshold. Commercial real estate: Collateral values are established by independent third-party appraisals and evaluations. Primary repayment sources include operating income generated by the real estate, permanent debt refinancing, sale of the real estate and, secondarily, liquidation of the collateral. Under its lending guidelines, the Company generally requires a corporate or personal guarantee from individuals that hold material ownership in the borrowing entity when the loan-to-value of a commercial real estate loan is in excess of a specified threshold. Commercial construction: These loans are generally considered to present a higher degree of risk than other real estate loans and may be affected by a variety of factors, such as adverse changes in interest rates and the borrower’s ability to control costs and adhere to time schedules. Construction loans are underwritten utilizing feasibility studies, independent appraisal reviews, sensitivity analysis of absorption and lease rates and financial analysis of the developers and property owners. Construction loans are generally based upon estimates of costs and value associated with the completed project. Construction loan repayment is substantially dependent on the ability of the borrower to complete the project and obtain permanent financing. Business banking: These loans are typically secured by all business assets or commercial real estate. Business banking originations include traditionally underwritten loans as well as partially automated scored loans. Business banking scored loans are determined by utilizing the Company’s proprietary decision matrix that has a number of quantitative factors including, but not limited to, a guarantor’s credit score, industry risk, and time in business. The Company also engages in Small Business Association (“SBA”) lending. The SBA guarantees reduce the Company’s loss due to default and are considered a credit enhancement to the loan structure. Residential Lending These loans are made to borrowers who demonstrate the ability to repay principal and interest on a monthly basis. Underwriting considerations include, among others, income sources and their reliability, willingness to repay as evidenced by credit repayment history, financial resources (including cash reserves) and the value of the collateral. The Company maintains policy standards for minimum credit score and cash reserves and maximum loan-to-value consistent with a “prime” portfolio. Collateral consists of mortgage liens on 1-4 family residential dwellings. The policy standards applied to loans originated by the Company are the same as those applied to purchased loans. The Company does not originate or purchase sub-prime or other high-risk loans. Residential loans are originated either for sale to investors or retained in the Company’s loan portfolio. Decisions about whether to sell or retain residential loans are made based on the interest rate characteristics, pricing for loans in the secondary mortgage market, competitive factors and the Company’s liquidity and capital needs. Consumer Lending Consumer home equity: Home equity lines of credit are granted for ten years with monthly interest-only repayment requirements. At the end of the ten-year draw period, home equity lines of credit are amortized over the remaining maturity period and monthly payments of principal and interest are required. Home equity loans are term loans that require the monthly payment of principal and interest such that the loan will be fully amortized at maturity. Underwriting considerations are materially consistent with those utilized in residential real estate. Collateral consists of a senior or subordinate lien on owner-occupied residential property. Other consumer: The Company’s policy and underwriting in this category, which is comprised primarily of home improvement, automobile and aircraft loans, include the following factors, among others: income sources and reliability, credit histories, term of repayment, and collateral value, as applicable. These are typically granted on an unsecured basis, with the exception of aircraft and automobile loans. Credit Quality Commercial Lending Credit Quality The credit quality of the Company’s commercial loan portfolio is actively monitored and supported by a comprehensive credit approval process and all large dollar transactions are sent for approval to a committee of seasoned business line and credit professionals. The Company maintains an independent credit risk review function that reports directly to the Risk Management Committee of the Board of Directors. Credits that demonstrate significant deterioration in credit quality are transferred to a specialized group of experienced officers for individual attention. The Company monitors credit quality indicators and utilizes portfolio scorecards to assess the risk of its commercial portfolio. Specifically, the Company utilizes a 15-point credit risk-rating system to manage risk and identify potential problem loans. Under this point system, risk-rating assignments are based upon a number of quantitative and qualitative factors that are under continual review. Factors include cash flow, collateral coverage, liquidity, leverage, position within the industry, internal controls and management, financial reporting, and other considerations. Commercial loan risk ratings are (re)evaluated for each loan at least once-per-year. The risk-rating categories under the credit risk-rating system are defined as follows: 0 Risk Rating- Unrated Certain segments of the portfolios are not rated. These segments include aircraft loans, business banking scored loan products, and other commercial loans managed by exception. Loans within this unrated loan segment are monitored by delinquency status; and for lines of credit greater than $100,000 in exposure, an annual review is conducted which includes the review of the business score and loan and deposit account performance. The Company supplements performance data with current business credit scores for the business banking portfolio on a quarterly basis. Unrated commercial and business banking loans are generally restricted to commercial exposure of less than $1.5 million. Loans included in this category generally are not required to provide regular financial reporting or regular covenant monitoring. For purposes of estimating the allowance for loan losses, unrated loans are considered in the same manner as “Pass” rated loans. Unrated loans are included with “Pass” rated loans for disclosure purposes. 1-10 Risk Rating – Pass Loans with a risk rating of 1-10 are classified as “Pass” and are comprised of loans that range from “substantially risk free” which indicates borrowers of unquestioned credit standing, well-established national companies with a very strong financial condition, and loans fully secured by policy conforming cash levels, through “low pass” which indicates acceptable rated loans that may be experiencing weak cash flow, impending lease rollover or minor liquidity concerns. 11 Risk Rating – Special Mention (Potential Weakness) Loans to borrowers in this category exhibit potential weaknesses or downward trends deserving management’s close attention. While potentially weak, no loss of principal or interest is envisioned. Included in this category are borrowers who are performing as agreed, are weak when compared to industry standards, may be experiencing an interim loss and may be in declining industries. An element of asset quality, financial flexibility or management is below average. The Company does not consider borrowers within this category as new business prospects. Borrowers rated special mention may find it difficult to obtain alternative financing from traditional bank sources. 12 Risk Rating – Substandard (Well-Defined Weakness) Loans with a risk-rating of 12 exhibit well-defined weaknesses that, if not corrected, may jeopardize the orderly liquidation of the debt. A loan is classified as substandard if it is inadequately protected by the repayment capacity of the obligor or by the collateral pledged. Specifically, repayment under market rates and terms, or by the requirements under the existing loan documents, is in jeopardy, but no loss of principal or interest is envisioned. There is a possibility that a partial loss of principal and/or interest will occur in the future if the deficiencies are not corrected. Loss potential, while existing in the aggregate portfolio of substandard assets, does not have to exist in individual assets classified as substandard. Non-accrual is possible, but not mandatory, in this class. 13 Risk Rating – Doubtful (Loss Probable) Loans classified as doubtful have comparable weaknesses as found in the loans classified as substandard, with the added provision that such weaknesses make collection of the debt in full (based on currently existing facts, conditions and values) highly questionable and improbable. Serious problems exist such that a partial loss of principal is likely. The probability of loss exists, but because of reasonably specific pending factors that may work to strengthen the credit, estimated losses are deferred until a more exact status can be determined. Specific reserves will be the amount identified after specific review. Non-accrual is mandatory in this class. 14 Risk Rating – Loss Loans to borrowers in this category are deemed incapable of repayment. Loans to such borrowers are considered uncollectible and of such little value that continuance as active assets of the Company is not warranted. This classification does not mean that the loans have no recovery or salvage value, but rather, it is not practical or desirable to defer writing off these assets even though partial recovery may occur in the future. Loans in this category have a recorded investment of $0 at the time of the downgrade. Residential and Consumer Lending Credit Quality For the Company’s residential and consumer portfolios, the quality of the loan is best indicated by the repayment performance of an individual borrower. Updated appraisals, broker opinions of value and other collateral valuation methods are employed in the residential and consumer portfolios, typically for credits that are deteriorating. Delinquency status is determined using payment performance, while accrual status may be determined using a combination of payment performance, expected borrower viability and collateral value. Delinquent consumer loans are handled by a team of seasoned collection specialists. The following table details the amortized cost balances of the Company’s loan portfolios, presented by credit quality indicator and origination year as of December 31, 2025, and gross charge-offs for the year ended December 31, 2025:
(1)The amounts presented represent the amortized cost as of December 31, 2025 of revolving loans that were converted to term loans during the year ended December 31, 2025. The following table details the amortized cost balances of the Company’s loan portfolios, presented by credit quality indicator and origination year as of December 31, 2024:
(1)The amounts presented represent the amortized cost as of December 31, 2024 of revolving loans that were converted to term loans during the year ended December 31, 2024. Asset Quality The Company manages its loan portfolio with careful monitoring. As a general rule, loans more than 90 days past due with respect to principal and interest are classified as non-accrual loans. Exceptions may be made if management believes that collateral held by the Company is clearly sufficient and in full satisfaction of both principal and interest. The Company may also use discretion regarding other loans over 90 days delinquent if the loan is well secured and in the process of collection. Non-accrual loans and loans that are more than 90 days past due but still accruing interest are considered non-performing loans. Non-accrual loans may be returned to an accrual status when principal and interest payments are no longer delinquent, and the risk characteristics of the loan have improved to the extent that there no longer exists a concern as to the collectability of principal and interest. Loans are considered past due based upon the number of days delinquent according to their contractual terms. A loan is expected to remain on non-accrual status until it becomes current with respect to principal and interest, the loan is liquidated, or the loan is determined to be uncollectible and is charged-off against the allowance for loan losses. The following tables show the age analysis of past due loans as of the dates indicated:
The following table presents information regarding non-accrual loans as of the dates indicated:
(1)The loans on non-accrual status and without an ACL as of both December 31, 2025 and 2024, were primarily comprised of collateral dependent loans for which the fair value of the underlying loan collateral exceeded the loan carrying value. The amount of interest income recognized on non-accrual loans during the year ended December 31, 2025 and 2024 was not significant. As of both December 31, 2025 and 2024, there were no loans greater than 90 days past due and still accruing. It is the Company’s policy to reverse any accrued interest when a loan is put on non-accrual status and, generally, to record any payments received from a borrower related to a loan on non-accrual status as a reduction of the amortized cost basis of the loan. Accrued interest reversed against interest income for the years ended December 31, 2025 and 2024 was not significant. For collateral values for residential mortgage and home equity loans, the Company relies primarily upon third-party valuation information from certified appraisers and values are generally based upon recent appraisals of the underlying collateral, brokers’ opinions based upon recent sales of comparable properties, or estimated auction or liquidation values less estimated costs to sell. As of December 31, 2025 and 2024, the Company had collateral-dependent residential mortgage and home equity loans totaling $4.4 million and $1.1 million, respectively. For collateral-dependent commercial loans, the amount of the allowance for loan losses is individually assessed based upon the fair value of the collateral. Various types of collateral are used, including real estate, inventory, equipment, accounts receivable, securities and cash, among others. For commercial real estate loans, the Company relies primarily upon third-party valuation information from certified appraisers and values are generally based upon recent appraisals of the underlying collateral, brokers’ opinions based upon recent sales of comparable properties, estimated equipment auction or liquidation values, income capitalization, or a combination of income capitalization and comparable sales. As of December 31, 2025 and 2024, the Company had collateral-dependent commercial loans totaling $133.5 million and $107.7 million, respectively. Appraisals for all loan types are obtained at the time of loan origination as part of the loan approval process and are updated at the time of a loan modification and/or refinance and as considered necessary by management for impairment review purposes. In addition, appraisals are updated as required by regulatory pronouncements. As of both December 31, 2025 and 2024, the Company had no residential real estate held in other real estate owned (“OREO”). As of December 31, 2025, there were twelve residential real estate loans, which had an aggregate balance of $3.0 million, collateralized by residential real estate property for which formal foreclosure proceedings were in-process. As of December 31, 2024, there were four residential real estate loans, which had an aggregate balance of $0.4 million, collateralized by residential real estate property for which formal foreclosure proceedings were in-process. As of December 31, 2025, there were four consumer home equity loans, which had an aggregate balance of $0.3 million, collateralized by residential real estate property for which formal foreclosure proceedings were in-process. As of December 31, 2024, there were six consumer home equity loans, which had an aggregate balance of $0.5 million, collateralized by residential real estate property for which formal foreclosure proceedings were in-process. Loan Modifications to Borrowers Experiencing Financial Difficulty The following table shows the amortized cost balance as of dates indicated of loans modified during the years then ended to borrowers experiencing financial difficulty by the type of concession granted:
The following tables describe the financial effect of the modifications made during the periods indicated to borrowers experiencing financial difficulty. Loans that were modified in more than one manner are included in each modification type corresponding to the types of modifications performed:
As of December 31, 2025, loans to borrowers experiencing financial difficulty modified during the year ended December 31, 2025 and which had a payment default during the year ended December 31, 2025 totaled $0.3 million. As of December 31, 2024, loans to borrowers experiencing financial difficulty modified during the year ended December 31, 2024 and which had a payment default during the year ended December 31, 2024 totaled $0.5 million. As of December 31, 2023, no loans to borrowers experiencing financial difficulty modified during the year ended December 31, 2023 had a payment default during the year ended December 31, 2023. Management closely monitors the performance of loans that are modified to borrowers experiencing financial difficulty to understand the effectiveness of its modification efforts. The following tables show the age analysis of past due loans to borrowers experiencing financial difficulty as of the dates indicated that were modified during the 12-month periods then ended:
As of December 31, 2025, there were no additional commitments to lend to borrowers experiencing financial difficulty and which were modified during the year ended December 31, 2025 in the form of principal forgiveness, an interest rate reduction, an other-than-insignificant delay in repayment, or a term extension. As of December 31, 2024, there was one additional commitment to lend amounting to $0.3 million to borrowers experiencing financial difficulty and which were modified during year ended December 31, 2024 in the form of principal forgiveness, an interest rate reduction, an other-than-insignificant delay in repayment, or a term extension. Loan Participations The Company occasionally purchases commercial loan participations, or participates in syndications through the SNC Program. These participations meet the same underwriting, credit and portfolio management standards as the Company’s other loans and are applied against the same criteria to determine the allowance for loan losses as other loans. The following table summarizes the Company’s loan participations:
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| Property, Plant and Equipment [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Premises and Equipment | Premises and Equipment The information presented within this Note excludes discontinued operations with respect to information pertaining to the year ended December 31, 2023. Refer to Note 24, “Discontinued Operations” for further discussion regarding discontinued operations. The following table summarizes the Company’s premises and equipment as of the dates indicated:
The Company recorded depreciation expense related to premises and equipment of $12.8 million, $12.5 million, and $10.5 million during the years ended December 31, 2025, 2024, and 2023, respectively. During the year ended December 31, 2025, one property was transferred to held for sale which had a book value of $0.2 million at the time of transfer. During the year ended December 31, 2024, four properties were transferred to held for sale with an aggregated book value of $17.1 million, one of which is located in Lynn, Massachusetts, housed Company offices and was comprised of an office building and land, and two of which were acquired in the merger with Cambridge. In connection with the transfer of properties to held for sale, the Company recorded an aggregate write-down of $3.0 million, which includes estimated costs to sell. In addition, during the year ended December 31, 2024, the Company sold three properties at an aggregate sale price of $15.1 million, two of which were acquired in the merger with Cambridge and one of which was the previously mentioned property located in Lynn, Massachusetts. In connection with such sales, the Company recorded a net gain on sale of $0.4 million. During the year ended December 31, 2023, no properties were transferred to held for sale and no properties were sold.
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Leases |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases | Leases The Company leases certain office space and equipment under various non-cancelable operating leases. These leases have original terms ranging from 1 year to 24 years. Operating lease liabilities and ROU assets are recognized at the lease commencement date based upon the present value of the future minimum lease payments over the lease term. Operating lease liabilities are recorded within other liabilities and ROU assets are recorded within other assets in the Company’s Consolidated Balance Sheets. The information presented within this Note excludes discontinued operations with regard to information pertaining to the year ended December 31, 2023. Refer to Note 24, “Discontinued Operations” for further discussion regarding discontinued operations. As of the dates indicated, the Company had the following related to operating leases:
Finance leases are not material. Finance lease liabilities are recorded within other liabilities and finance ROU assets are recorded within other assets in the Company’s Consolidated Balance Sheets. The following table is a summary of the Company’s components of net lease cost for the periods indicated:
During the years ended December 31, 2025, 2024, and 2023 the Company made $16.2 million, $16.3 million, and $13.3 million in cash payments for operating and finance leases, respectively. Supplemental balance sheet information related to operating leases as of the dates indicated is as follows:
The following table sets forth the undiscounted cash flows of base rent related to operating leases outstanding as of December 31, 2025 with payments scheduled over the next five years and thereafter, including a reconciliation to the operating lease liability recognized in other liabilities in the Company’s Consolidated Balance Sheets:
Lease Modifications and Terminations: During the year ended December 31, 2025, management determined not to exercise future lease term extension options related to three leases, which had previously been included in its determination of future lease payments, to exercise future lease term extension options related to six leases, which had not previously been included in its determination of future lease payments, and to terminate two leases. Accordingly, the Company remeasured the present value of the future lease payments related to such leases which resulted in a net increase of the lease liabilities and a corresponding net increase of the lease ROU assets of $2.4 million. The Company recorded an impairment charge of $3.5 million related to one lease acquired in connection with the Company’s merger with Cambridge. During the year ended December 31, 2024, management determined not to exercise a future lease term extension option related to one lease, which had previously been included in its determination of future lease payments, to exercise future lease term extension options related to eleven leases, which had not previously been included in its determination of future lease payments, and to terminate eight leases. Accordingly, the Company remeasured the present value of the future lease payments related to such leases which resulted in a net increase of the lease liabilities and a corresponding net increase of the lease ROU assets of $5.5 million. In connection with the lease terminations, the Company recorded an impairment charge of $4.7 million.
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| Leases | Leases The Company leases certain office space and equipment under various non-cancelable operating leases. These leases have original terms ranging from 1 year to 24 years. Operating lease liabilities and ROU assets are recognized at the lease commencement date based upon the present value of the future minimum lease payments over the lease term. Operating lease liabilities are recorded within other liabilities and ROU assets are recorded within other assets in the Company’s Consolidated Balance Sheets. The information presented within this Note excludes discontinued operations with regard to information pertaining to the year ended December 31, 2023. Refer to Note 24, “Discontinued Operations” for further discussion regarding discontinued operations. As of the dates indicated, the Company had the following related to operating leases:
Finance leases are not material. Finance lease liabilities are recorded within other liabilities and finance ROU assets are recorded within other assets in the Company’s Consolidated Balance Sheets. The following table is a summary of the Company’s components of net lease cost for the periods indicated:
During the years ended December 31, 2025, 2024, and 2023 the Company made $16.2 million, $16.3 million, and $13.3 million in cash payments for operating and finance leases, respectively. Supplemental balance sheet information related to operating leases as of the dates indicated is as follows:
The following table sets forth the undiscounted cash flows of base rent related to operating leases outstanding as of December 31, 2025 with payments scheduled over the next five years and thereafter, including a reconciliation to the operating lease liability recognized in other liabilities in the Company’s Consolidated Balance Sheets:
Lease Modifications and Terminations: During the year ended December 31, 2025, management determined not to exercise future lease term extension options related to three leases, which had previously been included in its determination of future lease payments, to exercise future lease term extension options related to six leases, which had not previously been included in its determination of future lease payments, and to terminate two leases. Accordingly, the Company remeasured the present value of the future lease payments related to such leases which resulted in a net increase of the lease liabilities and a corresponding net increase of the lease ROU assets of $2.4 million. The Company recorded an impairment charge of $3.5 million related to one lease acquired in connection with the Company’s merger with Cambridge. During the year ended December 31, 2024, management determined not to exercise a future lease term extension option related to one lease, which had previously been included in its determination of future lease payments, to exercise future lease term extension options related to eleven leases, which had not previously been included in its determination of future lease payments, and to terminate eight leases. Accordingly, the Company remeasured the present value of the future lease payments related to such leases which resulted in a net increase of the lease liabilities and a corresponding net increase of the lease ROU assets of $5.5 million. In connection with the lease terminations, the Company recorded an impairment charge of $4.7 million.
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Goodwill and Other Intangible Assets |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets The table below sets forth the carrying amount of goodwill and other intangible assets, net of accumulated amortization as of the dates indicated below. With regard to the year ended December 31, 2023, the information presented within this Note excludes discontinued operations. Refer to Note 24, “Discontinued Operations” for further discussion regarding discontinued operations.
(1)The increase in goodwill and other intangible assets from December 31, 2024 to December 31, 2025 was due to goodwill and a core deposit intangible recorded during the fourth quarter of 2025 in connection with the HarborOne merger. Refer to Note 3, Mergers and Acquisitions for further information regarding the Company’s merger with HarborOne. The changes in the carrying value of goodwill for the periods indicated were as follows:
The following table sets forth the carrying amount of the Company’s other intangible assets, net of accumulated amortization, as of the dates indicated below:
The Company assesses goodwill for impairment at the reporting unit level on an annual basis or sooner if an event occurs or circumstances change which might indicate that the fair value of a reporting unit is below its carrying amount. The Company has identified and assigned goodwill to one reporting unit - the banking business unit. In accordance with the accounting guidance codified in ASC 350-20, the Company performs a test of goodwill for impairment at least on an annual basis. An assessment is also required to be performed to the extent relevant events and/or circumstances occur which may indicate it is more-likely-than-not that the fair value of a reporting unit is less than its carrying amount. The Company performed its annual assessment for the banking business as of November 30, 2025. The assessment included a comparison of the banking reporting unit’s carrying value of equity to estimated fair value of equity using the market capitalization method of the market approach. The Company evaluated conditions as of the assessment date and how a market participant would evaluate a control premium for the banking reporting unit. The implied control premium was estimated using the discounted cash flow method of the income approach by evaluating the present value of market participant cost savings and synergies. Based upon the assessment, it was determined there was no impairment of the Company’s goodwill as of November 30, 2025. The amortization expense of the Company’s other intangible assets was $34.2 million, $14.6 million, and $1.8 million during the years ended December 31, 2025, 2024, and 2023, respectively. The increase in amortization expense for the year ended December 31, 2025 from 2024 was attributable to amortization expense recorded in the fourth quarter of 2025 related to other intangible assets acquired in connection with the Company’s merger with HarborOne and a full year of amortization expense recorded in the year ended December 31, 2025 related to other intangible assets acquired in connection with the Company’s merger with Cambridge compared to a partial year in the year ended December 31, 2024 (following the completion of the merger in the third quarter of 2024). The weighted average original amortization period and weighted average remaining useful life of the Company’s other intangible assets is 7.5 years and 6.4 years, respectively. Management performs an assessment of the remaining useful lives of the Company’s intangible assets on a quarterly basis to determine if such lives remain appropriate. The estimated amortization expense for the remaining useful life of the Company’s other intangible assets is as follows:
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Deposits |
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| Banking and Thrift, Interest [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deposits | Deposits The following table provides a summary of the Company’s deposits as of the dates indicated:
At December 31, 2025 and 2024, the Company had a balance of $6.5 million and $3.2 million, respectively, in overdrafts. Overdrafts are included in loans in the Consolidated Balance Sheets. The following table summarizes certificates of deposit by maturity at December 31, 2025:
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Borrowed Funds |
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| Federal Home Loan Banks [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Borrowed Funds | Borrowed Funds Borrowed funds were comprised of the following:
Interest expense on borrowed funds was as follows:
A summary of FHLBB advances by maturities were as follows:
At December 31, 2025 and 2024, advances from the FHLBB were secured by stock in the FHLBB, residential real estate loans, and investment securities. At December 31, 2025, the collateral value of residential real estate loans, commercial real estate loans, and securities securing these advances was $3.1 billion, $0.3 billion, and $0.1 billion, respectively. At December 31, 2024, the collateral value of residential real estate loans and securities securing these advances was $1.5 billion and $1.0 billion , respectively. At December 31, 2025 and 2024, the Bank had available and unused borrowing capacity with the FHLBB of approximately $3.0 billion and $2.4 billion, respectively. As a member of the FHLBB, the Company is required to hold FHLBB stock. At December 31, 2025 and 2024, the Company had investments in the FHLBB of $13.8 million and $5.9 million, respectively. At its discretion, the FHLBB may declare dividends on the stock. Included in other noninterest income in the Consolidated Statements of Income are dividends received of $0.5 million, $0.9 million, and $2.0 million during the years ended December 31, 2025, 2024, and 2023, respectively. At December 31, 2025 and 2024, the Company had available and unused borrowing capacity of approximately $3.9 billion and $2.8 billion, respectively, at the Federal Reserve Discount Window. At December 31, 2025 and 2024, loans with collateral value of $3.5 billion and $2.1 billion, respectively, and securities with a collateral value of $400.4 million and $769.4 million, respectively, were pledged to the Discount Window.
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Earnings Per Share ("EPS") |
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share ("EPS") | Earnings Per Share (“EPS”) Basic EPS represents income/(loss) allocable to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common shares (such as stock options) were exercised or converted into additional common shares that would then share in the earnings of the Company. Diluted EPS is computed by dividing net income/(loss) allocable to common shareholders by the weighted-average number of common shares outstanding for the period, plus the effect of potential dilutive common share equivalents computed using the treasury stock method. Shares held by the Employee Stock Ownership Plan (“ESOP”) that have not been allocated to employees in accordance with the terms of the ESOP, referred to as “unallocated ESOP shares,” are not deemed outstanding for earnings per share calculations. The following are the components and results of the Company’s earnings per common share calculations for the periods presented:
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Low Income Housing Tax Credits and Other Tax Credit Investments |
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| Equity Method Investments and Joint Ventures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Low Income Housing Tax Credits and Other Tax Credit Investments | Low Income Housing Tax Credits and Other Tax Credit Investments The Community Reinvestment Act (“CRA”) encourages banks to meet the credit needs of their communities for housing and other purposes, particularly in neighborhoods with low or moderate income. The Company has primarily invested in separate Low Income Housing Tax Credits (“LIHTC”) projects, also referred to as qualified affordable housing projects, which provide the Company with tax credits and operating loss tax benefits over a period of 15 years. The return on these investments is generally generated through tax credits and tax losses. In addition to LIHTC projects, the Company invests in new market tax credit projects that qualify for CRA credits and eligible projects that qualify for renewable energy and historic tax credits. As of December 31, 2025 and 2024, the Company had $225.2 million and $222.7 million, respectively, in tax credit investments that were included in other assets in the Consolidated Balance Sheets. When permissible, the Company accounts for its investments in LIHTC projects and other qualifying investments using the proportional amortization method, under which it amortizes the initial cost of the investment in proportion to the amount of the tax credits and other tax benefits received and recognizes that amortization as a component of income tax expense. The net investment in the housing projects is included in other assets in the Company’s Consolidated Balance Sheets. The Company will continue to use the proportional amortization method on any new qualifying investments. The following table presents the Company’s investments in LIHTC projects using the proportional amortization method as of the dates indicated:
The following table presents additional information related to the Company’s investments in LIHTC projects for the periods indicated:
The Company accounts for certain other investments in renewable energy projects using the equity method of accounting. These investments in renewable energy projects are included in other assets on the Consolidated Balance Sheets and totaled $1.5 million and $1.9 million at December 31, 2025 and 2024, respectively.
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Income Taxes |
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| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Taxes | Income Taxes The information presented within this Note excludes discontinued operations with respect to the year ended December 31, 2023. Refer to Note 24, “Discontinued Operations” for further discussion regarding discontinued operations. The provision for income taxes is comprised of the following components:
A reconciliation of the U.S. federal statutory rate to the Company’s effective income tax rate is detailed below:
(1)The states and local jurisdictions that contribute to the majority (greater than 50%) of the tax effect in this category includes Massachusetts. Significant components of the Company’s deferred tax assets and deferred tax liabilities are presented below:
The Company assesses the realizability of deferred tax assets and whether it is more likely than not that all or a portion of the deferred tax assets will be realized. The Company considers projections of future taxable income during the periods in which deferred tax assets and liabilities are scheduled to reverse. Additionally, in determining the availability of operating loss carrybacks and other tax attributes, both projected future taxable income and tax planning strategies are considered in making this assessment. As a result of a projected taxable loss for the year ended December 31, 2025, the Company believes that a portion of the associated charitable contribution carryforward will expire unutilized and therefore has recorded a valuation allowance for $5.2 million. As of December 31, 2025, management believes it is more likely than not that the Company will realize the remainder of its net deferred tax assets. Management performed an evaluation of the Company’s uncertain tax positions as of December 31, 2025 and determined that no liability was needed for unrecognized tax benefits. Management performed a similar evaluation as of December 31, 2024 and determined that liabilities for unrecognized tax benefits of $1.8 million was needed related to certain state tax positions. The decrease was primarily due to a reversal of $1.8 million recognized during the year ended December 31, 2025. The following table presents a reconciliation of the beginning and ending amount of unrecognized tax benefits for the periods indicated:
The Company recognizes penalties and accrued interest related to unrecognized tax benefits in tax expense. No penalties or interest were accrued as of December 31, 2025. Accrued penalties and interest amounted to $0.5 million at December 31, 2024. During the year ended December 31, 2025, $1.8 million of unrecognized state tax benefits and $0.2 million of interest and penalties reversed upon expiration of the statute of limitations for the tax year to which the reserve was related. The Company had net operating loss carryforwards for federal or state income tax purposes represented by a deferred tax asset of $40.8 million and $23.8 million at December 31, 2025 and 2024, respectively. At December 31, 2025, the Bank’s federal pre-1988 reserve, for which no federal income tax provision has been made, was approximately $20.8 million. Under current federal law, these reserves are subject to recapture into taxable income, should the Company make non-dividend distributions, make distributions in excess of earnings and profits retained, as defined, or cease to maintain a banking type charter. A deferred tax liability is not recognized for the base year amount unless it becomes apparent that those temporary differences will reverse into taxable income in the foreseeable future. No deferred tax liability has been established as these two events are not expected to occur in the foreseeable future. The Company’s primary banking activities are in the states of Massachusetts, New Hampshire and Rhode Island; however, the Company also files additional state corporate income and/or franchise tax returns in states in which the Company has a filing requirement. The methods of filing, and the methods for calculating taxable and apportionable income, vary depending upon the laws of the taxing jurisdiction. The Company is subject to routine audits of its tax returns by the Internal Revenue Service and various state taxing authorities. The Company is no longer subject to federal and state income tax examinations by tax authorities for years before 2022. The Company invests in low-income affordable housing and renewable energy projects which provide the Company with tax benefits, including tax credits, generally over a period of approximately 5-15 years. When permissible, the Company accounts for its investments in Low Income Housing Tax Credit (“LIHTC”) projects using the proportional amortization method, under which it amortizes the initial cost of the investment in proportion to the amount of the tax credits and other tax benefits received and recognizes that amortization as a component of income tax expense. The net investment performance in the housing projects is included in other assets in the Consolidated Balance Sheets. The Company will continue to use the proportional amortization method on any new qualifying LIHTC investments. During the years ended December 31, 2025 and 2024, the Company generated federal tax credits primarily from LIHTC investments of $23.3 million and $16.5 million, respectively. The Company treats the investment tax credits received as a reduction of federal income taxes for the year in which the credit arises using the flow-through method (i.e., the credit flows directly through the statement of income in the year of purchase). For additional information on these investments, refer to Note 13, “Low Income Housing Tax Credits and Other Tax Credit Investments.” The amounts of cash income taxes (refunded) paid by the Company during the year ended December 31, 2025 were as follows:
The amount of cash income taxes paid by the Company during the years ended December 31, 2024 and 2023 was $18.8 million and $65.9 million, respectively.
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Minimum Regulatory Capital Requirements |
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| Banking and Thrift, Interest [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Minimum Regulatory Capital Requirements | Minimum Regulatory Capital Requirements The Company is subject to various regulatory capital requirements administered by federal banking agencies, including U.S. Basel III. Failure to meet minimum capital requirements can initiate certain mandatory, and possibly additional discretionary, actions by regulators that, if undertaken, could have a direct material effect on the Company’s Consolidated Financial Statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company must meet specific capital guidelines that involve quantitative measures of the Company’s assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The Company’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by the regulators to ensure capital adequacy require the Company to maintain minimum capital amounts and ratios. All banking companies are required to have total regulatory capital of at least 8% of risk-weighted assets, common equity Tier 1 capital of at least 4.5% of risk-weighted assets, core capital (“Tier 1”) of at least 6% of risk-weighted assets, and a minimum Tier 1 leverage ratio of 4% of adjusted average assets. As of December 31, 2025 and 2024, the Company was categorized as “well-capitalized” based on the regulatory framework for prompt corrective action. To be categorized as well-capitalized, the Company must maintain (1) a minimum total regulatory capital ratio of 10%; (2) a minimum common equity Tier 1 capital ratio of 6.5%; (3) a minimum Tier 1 capital ratio of 8% and (4) a minimum Tier 1 leverage ratio of 5%. Management believes that the Company met all capital adequacy requirements to which it is subject as of December 31, 2025 and 2024. There have been no conditions or events that management believes would cause a change in the Company’s categorization. The Company’s actual capital amounts and ratios are presented in the following table as of the dates indicated:
The Company is subject to various capital requirements in connection with seller/servicer agreements that have been entered into with secondary market investors. Failure to maintain minimum capital requirements could result in an inability to originate and service loans for the respective investor and, therefore, could have a direct material effect on the Company’s financial statements. Management believes that the Company met all capital requirements in connection with seller/servicer agreements as of December 31, 2025 and 2024.
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Employee Benefits |
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| Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Employee Benefits | Employee Benefits Pension Plans The Company provides pension benefits for its employees using a noncontributory, qualified defined benefit plan, through membership in SBERA. SBERA offers a common and collective trust as the underlying investment structure for pension plans participating in the association. The target allocation mix for the common and collective trust portfolio calls for an equity-based investment deployment range of 49% to 63% of total common and collective trust portfolio assets. The remainder of the common and collective trust’s portfolio is allocated to fixed income securities with a target range of 28% to 42% and other investments, including global asset allocation and hedge funds, from 3% to 12%. The Trustees of SBERA, through SBERA's Investment Committee, select investment managers for the common and collective trust portfolio. A professional investment advisory firm is retained by the Investment Committee to provide allocation analysis and performance measurement, and to assist with manager searches. The overall investment objective is to diversify investments across a spectrum of investment types to limit risks from large market swings. In connection with the Company’s merger with Cambridge, the Company acquired Cambridge’s defined benefit plan. The plan was frozen to new participants in 2011 and the accrual of benefits for all participants in the plan was frozen effective in 2017. At the time of the merger, all participants in the plan were fully vested. The Company assumed a $35.3 million pension benefit obligation from Cambridge following the merger and, effective December 31, 2024, the acquired plan was merged with the Company’s Defined Benefit Plan. All Cambridge employees retained following the merger were credited with prior service, which counted for vesting and eligibility into the Company’s Defined Benefit Plan, but not for benefit accrual. Additionally, all Cambridge employees retained following the merger were eligible to join the Company’s Defined Benefit Plan to the extent that eligibility requirements were satisfied based upon such employees’ prior service with Cambridge. In connection with the sale of its insurance agency business, the Company amended its Defined Benefit Plan to allow for accelerated vesting for any employees of the insurance agency business and several employees of the Bank transitioning to Gallagher who were otherwise not vested in the Defined Benefit Plan at the time of sale. The Company has a BEP to provide retirement benefits to certain employees whose retirement benefits under the Defined Benefit Plan are limited per the Internal Revenue Code. In connection with the sale of its insurance agency business, the Company amended the BEP to allow for accelerated vesting for all employees of the insurance agency business and several employees of the Bank transitioning to Gallagher who were participating in the BEP and were otherwise not vested in the BEP at the time of sale. In addition, the Company amended the vesting criteria for the BEP to align with that of the Defined Benefit Plan, so that all BEP participants have been credited with service vesting in the same manner and vest according to the same three year cliff vesting schedule as provided under the Defined Benefit Plan. The Company has a DB SERP which provides certain retired officers with defined pension benefits in excess of qualified plan limits imposed by U.S. federal tax law. In connection with the Company’s merger with Cambridge, the Company acquired Cambridge’s DB SERP. In 2016, Cambridge’s Board of Directors discontinued the use of DB SERPs for new entrants to Cambridge’s non-qualified retirement programs. Expense for the DB SERPs is recognized over the executive’s service life utilizing the projected unit credit actuarial cost method. All participants of Cambridge’s DB SERP were deemed to be fully vested upon the closing of the merger. The Company has a ODRCP which provides pension benefits to outside directors who retire from service. Effective December 31, 2020, the Company closed the ODRCP to new participants and froze benefit accruals for active participants. Refer to Note 2, Summary of Significant Accounting Policies, for additional discussion of the Company’s pension plans. Obligations and Funded Status The funded status and amounts recognized in the Company’s Consolidated Financial Statements for the Defined Benefit Plan, the BEP, the DB SERP, the ODRCP, and the PHCP are set forth in the following table:
(1)Includes service costs related to employees of the insurance agency business as it relates to the year ended December 31, 2023. Refer to the later discussion within the “Components of Net Periodic Benefit Cost” section within this Note for further discussion. In accordance with the Pension Protection Act, the Company was not required to make any contributions to the Defined Benefit Plan for the plan years beginning November 1, 2024, 2023 and 2022. Accordingly, during the years ended December 31, 2025, 2024, and 2023, there were no contributions to the Defined Benefit Plan and the Company expects to make no contribution during the plan year beginning November 1, 2025. The net actuarial loss of $13.1 million during the year ended December 31, 2025 was primarily attributable to a decrease in the discount rate assumptions used for determining the benefit obligation which was partially offset by higher returns on plan assets than initially expected. The net actuarial gain of $15.3 million during the year ended December 31, 2024 was primarily attributable to an increase in the discount rate assumptions used for determining the benefit obligation and higher returns on plan assets than initially expected. The net actuarial loss of $13.9 million during the year ended December 31, 2023 was primarily attributable to a decrease in the discount rate assumptions used for determining the benefit obligation which was partially offset by higher returns on plan assets than initially expected. Actuarial Assumptions The assumptions used in determining the benefit obligations at December 31, 2025 and 2024 were as follows:
The assumptions used in determining the net periodic benefit cost for the years ended December 31, 2025, 2024, and 2023 were as follows:
In general, the Company has selected its assumptions with respect to the expected long-term rate of return based on prevailing yields on high quality fixed income investments increased by a premium for equity return expectations. To determine the discount rate used in calculating the benefit obligation and the benefit cost for all of its defined benefit plans, the Company uses the spot rate approach whereby the individual spot rates on the FTSE above-median yield curve are applied to each corresponding year’s projected cash flow used to measure the respective plan’s service cost and interest cost. Plan Assets The Company owns a percentage of the SBERA defined benefit common collective trust. Based upon this ownership percentage, plan assets managed by SBERA on behalf of the Company amounted to $583.0 million and $545.2 million at December 31, 2025 and 2024, respectively. Investments held by the common collective trust include Level 1, 2 and 3 assets such as: collective funds, equity securities, mutual funds, hedge funds and short-term investments. The Fair Value Measurements and Disclosures Topic of the FASB ASC stipulates that an asset’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. As such, the Company classifies its interest in the common collective trust as a Level 3 asset. The table below presents a reconciliation of the Company’s interest in the SBERA common collective trust during the years indicated:
Components of Net Periodic Benefit Cost The components of net pension expense for the plans for the periods indicated are as follows:
(1)Includes service costs related to employees of the Company’s insurance agency business for the year ended December 31, 2023. Such service costs were included in net income from discontinued operations as such costs are no longer incurred by the Company following the sale of the insurance agency business in October 2023. All other costs included in the determination of the benefit obligation for the Defined Benefit Plan and the BEP were included in net income from continuing operations as the Bank assumed the related liability upon dissolution of its Eastern Insurance Group subsidiary. Service costs included in net income from discontinued operations and included in the above table were $5.1 million for the year ended December 31, 2023. (2)The pension curtailment gain recognized during the year ended December 31, 2023 was included in discontinued operations. Refer to the below discussion under “Pension Curtailment and Settlement” for further discussion. Except as indicated above as it relates to service costs included in discontinued operations, service costs for the Defined Benefit Plan, the BEP, and the DB SERP are recognized within salaries and employee benefits in the Consolidated Statement of Income. In addition, as indicated above, the pension curtailment gain is also included in discontinued operations within the gain on sale of discontinued operations. The remaining components of net periodic benefit cost are recognized in in the Consolidated Statements of Income. Pension Curtailment and Settlement As discussed in the earlier “Pension Plans” section, during the year ended December 31, 2023 and in connection with the sale of its insurance agency business, the Company remeasured the plan assets and obligations of the Defined Benefit Plan and the obligations of the BEP to determine the resulting curtailment gain or loss. The remeasurement followed the Company’s amendments to to its Defined Benefit Plan and BEP. As a result and in accordance with ASC 715-30, “Compensation-Retirement Benefits - Defined Benefit Plans,” the Company recognized a curtailment gain upon completion of the sale of the insurance agency business associated with the prior service credits attributable to the employees of the insurance agency business, all of which transferred to Gallagher. The Company determined, with assistance from its actuaries, the amount of the resulting non-cash curtailment amount to be a gain of $15.9 million which was included in the gain on sale of the insurance agency business. As a practical expedient, ASC 715, “Compensation–Retirement Benefits,” permits employers to not apply pension plan settlement accounting and to treat settlement transactions as normal benefit payments if the cost of all settlements in the year is less than or equal to the sum of the service cost and interest cost components of net periodic benefit cost. The Company has elected this practical expedient. Benefits expected to be paid The following table summarizes estimated benefits to be paid from the Defined Benefit Plan and BEP for the plan years beginning on November 1, and the DB SERP, the ODRCP, and the PHCP for the plan years beginning January 1:
Employee Tax Deferred Incentive Plan The Company has an employee tax deferred incentive plan, otherwise known as a 401(k) plan, under which the Company makes voluntary contributions within certain limitations. All employees who meet specified age and length of service requirements are eligible to participate in the 401(k) plan. The amount contributed by the Company is included in salaries and employee benefits expense. The amounts contributed to the plan for the years ended December 31, 2025, 2024, and 2023, were $5.6 million, $4.9 million and $5.2 million, respectively. Defined Contribution Supplemental Executive Retirement Plan The Company’s DC SERP, a defined contribution supplemental executive retirement plan, allows certain senior officers to earn benefits calculated as a percentage of their compensation. The participant benefits are adjusted based upon a deemed investment performance of measurement funds selected by the participant. These measurement funds are for tracking purposes and are used only to track the performance of a mutual fund, market index, savings instrument, or other designated investment or portfolio of investments. The Company recorded expense related to the DC SERP of $0.1 million during the year ended December 31, 2025. The Company recognized no expense related to the DC SERP during the year ended December 31, 2024. The Company recorded expense related to the DC SERP of $0.1 million during the year ended December 31, 2023. The total amount due to participants under this plan was included in other liabilities on the Company’s Consolidated Balance Sheets and amounted to $21.3 million and $23.7 million at December 31, 2025 and 2024, respectively. Deferred Compensation Plans The Company sponsors four plans which allow for elective compensation deferrals by directors, former trustees, and certain senior-level employees. Each plan allows its participants to designate deemed investments for deferred amounts from certain options which include diversified choices, such as exchange traded funds and mutual funds. Portfolios with various risk profiles are available to participants with the approval of the Compensation Committee of the Board of Directors. The Company purchases and sells investments which track the deemed investment choices, so that it has available funds to meet its payment liabilities. Deferred amounts, adjusted for deemed investment performance, are paid at the time of a participant designated date or event, such as separation from service, death, or disability. The total amounts due to participants under the plans were included in other liabilities on the Company’s Consolidated Balance Sheets and amounted to $32.9 million and $33.3 million at December 31, 2025 and 2024, respectively. Rabbi Trust Variable Interest Entity The Company established rabbi trusts to meet its obligations under certain executive non-qualified retirement benefits and deferred compensation plans and to mitigate the expense volatility of the aforementioned retirement plans. The rabbi trusts are considered VIEs as the equity investment at risk is insufficient to permit the trusts to finance their activities without additional subordinated financial support from the Company. The Company is considered the primary beneficiary of the rabbi trusts as it has the power to direct the activities of the rabbi trusts that significantly affect the rabbi trusts’ economic performance and it has the obligation to absorb losses of the rabbi trusts that could potentially be significant to the rabbi trusts by virtue of its contingent call options on the rabbi trusts’ assets in the event of the Company’s bankruptcy. As the primary beneficiary of these VIEs, the Company consolidates the rabbi trust investments. In general, the rabbi trust investments and any earnings received thereon are accumulated, reinvested and used exclusively for trust purposes. These rabbi trust investments consist primarily of cash and cash equivalents, U.S. government agency obligations, equity securities, mutual funds and other exchange-traded funds, and are recorded at fair value in other assets in the Company’s Consolidated Balance Sheets. Changes in fair value are recorded in noninterest income. Assets held in rabbi trust accounts by plan type, at fair value, were as follows:
The following tables present the book value, net unrealized gain or loss, and market value of assets held in rabbi trust accounts by asset type:
(1)Equities include mutual funds and other exchange-traded funds. The Company had equity securities held in rabbi trust accounts of $84.2 million and $82.3 million as of December 31, 2025 and 2024, respectively. Included in the equity securities presented in the tables above are exchange-traded mutual funds which had a net asset value of $57.1 million and $54.1 million as of December 31, 2025 and 2024, respectively.
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Share-Based Compensation |
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| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Compensation | Share-Based Compensation Employee Stock Ownership Plan As part of the IPO completed on October 14, 2020, the Company established a tax-qualified Employee Stock Ownership Plan to provide eligible employees the opportunity to own Company shares. The ESOP borrowed $149.4 million from the Company to purchase 14,940,652 common shares during the IPO and in the open market. The loan is payable in annual installments over 30 years at an interest rate equal to the Prime rate as published in the The Wall Street Journal. As the loan is repaid to the Company, shares are released and allocated proportionally to eligible participants on the basis of each participant’s proportional share of compensation relative to the compensation of all participants. The unallocated ESOP shares are pledged as collateral on the loan. The Company accounts for its ESOP in accordance with FASB ASC 718-40, “Compensation – Stock Compensation.” Under this guidance, unreleased shares are deducted from shareholders’ equity as unearned ESOP shares in the accompanying Consolidated Balance Sheets. The Company recognizes compensation expense equal to the fair value of the ESOP shares during the periods in which they are committed to be released. To the extent that the fair value of the Company’s ESOP shares differs from the cost of such shares, the difference is credited or debited to equity. As the loan is internally leveraged, the loan receivable from the ESOP to the Company is not reported as an asset nor is the debt of the ESOP shown as a liability in the Company’s Consolidated Balance Sheets. Dividends on unallocated shares are used to pay the ESOP debt. The following table presents the amount of compensation expense associated with the ESOP and the amount of the loan payments made by the ESOP, including the portions related to principal and interest, for the periods indicated:
The number of shares committed to be released per year is estimated to be 495,313 through 2049 and 392,123 in the year 2050. The following table presents share information held by the ESOP:
Share-Based Compensation Plan On November 29, 2021, the shareholders of the Company approved the Eastern Bankshares, Inc. 2021 Equity Incentive Plan (the “2021 Plan”). The 2021 Plan provides for the issuance of up to 26,146,141 shares of common stock pursuant to grants of restricted stock, restricted stock units (“RSUs”), non-qualified stock options and incentive stock options, any or all of which can be granted with performance-based vesting conditions. Under the 2021 Plan, 7,470,326 shares may be issued as restricted stock or RSUs, including those issued as performance shares and performance share units (“PSUs”), and 18,675,815 shares may be issued upon the exercise of stock options. These shares may be awarded from the Company’s authorized but unissued shares. However, the 2021 Plan permits the grant of additional awards of restricted stock or RSUs above the aforementioned limit, provided that, for each additional share of restricted stock or RSU awarded in excess of such limit, the pool of shares available to be issued upon the exercise of stock options will be reduced by three shares. Pursuant to the terms of the 2021 Plan, each of the Company’s non-employee directors were automatically granted awards of restricted stock on November 30, 2021. Such restricted stock awards vest pro-rata on an annual basis over a five-year period. The maximum term for stock options is ten years. The following table summarizes the share-based compensation awards for the years ended December 31, 2025, 2024 and 2023:
(1)Vesting of PSU awards is contingent upon the Compensation and Human Capital Management Committee of the Board of Director’s certification, after the conclusion of the period indicated from the date of the grant, that the Company has attained a threshold level of certain performance criteria over such period. As of December 31, 2025 and 2024, there were 3,134,086 shares and 3,844,157 shares that remained available for issuance as restricted stock or RSU awards (including those that may be issued as performance shares and PSUs), respectively, and 18,675,815 shares that remained available for issuance upon the exercise of stock options at both dates. As of both December 31, 2025 and 2024, no stock options had been awarded under the 2021 Plan. The following table summarizes the Company’s restricted stock award activity for the periods indicated:
The following table summarizes the Company’s restricted stock unit activity for the periods indicated:
The following table summarizes the Company’s performance stock unit activity for the periods indicated:
Included in vested RSU and PSU shares, as shown in the tables above, are shares withheld for employee payroll taxes. The aggregate number of RSU and PSU shares withheld for payroll taxes during the years ended December 31, 2025, 2024, and 2023, was 401,357, 147,323, and 95,808, respectively. The following table shows share-based compensation expense under the 2021 Plan and the related tax benefit for the periods indicated:
(1)Estimated based upon the Company’s statutory rate for the respective period. As of December 31, 2025 and 2024, there was $20.8 million and $21.4 million, respectively, of total unrecognized compensation expense related to unvested RSAs, RSUs, and PSUs granted and issued under the 2021 Plan, as applicable. As of December 31, 2025, this cost is expected to be recognized over a weighted average remaining period of approximately 1.6 years. As of December 31, 2024, this cost was expected to be recognized over a weighted average remaining period of approximately 1.4 years. Stock Options In connection with the Company’s merger with HarborOne, 728,896 stock options, which were awarded by HarborOne to certain employees and which were fully vested at the time of the merger close, were converted to stock options of the Company. The fair value of each option was estimated on the merger closing date of November 1, 2025 using the Black-Scholes option-pricing model with the portion of fair value related to pre-combination service being included as an adjustment to consideration paid in the merger. The valuation model included the following assumptions: (i) volatility was based upon the Company’s historical volatility; (ii) expected life represented the period of time that the option is expected to be outstanding, taking into account the contractual term and the vesting period; (iii) expected dividend yield was based on the Company’s history and expectation of dividend payouts; (iv) the risk-free rate was based on the U.S. Treasury yield curve in effect at the time of grant for a period equivalent to the weighted average expected life of the option, which was approximately three months. During the fourth quarter of 2025 and following the merger completion, 400,279 options were exercised. As of December 31, 2025, there were 328,617 outstanding options which had an aggregate fair value of $1.5 million. As of December 31, 2025, the weighted average remaining contractual term was 6 months.
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Commitments and Contingencies |
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| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies | Commitments and Contingencies Financial Instruments with Off-Balance Sheet Risk In order to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates, the Company is party to financial instruments with off-balance sheet risk in the normal course of business. These financial instruments include commitments to extend credit, standby letters of credit, and forward commitments to sell loans, all of which involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Balance Sheets. The contract or notional amounts of those instruments reflect the extent of involvement the Company has in each particular class of financial instruments. Substantially all of the Company’s commitments to extend credit, which normally have fixed expiration dates or termination clauses, are contingent upon customers maintaining specific credit standards at the time of loan funding. Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. In the event the customer does not perform in accordance with the terms of agreement with the third party, the Company would be required to fund the commitment. The maximum potential amount of future payments the Company could be required to make is represented by the contractual amount of the commitment. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. For forward loan sale commitments, the contract or notional amount does not represent exposure to credit loss. The Company generally does not sell loans with recourse. The following table summarizes the above financial instruments as of the dates indicated:
Other Contingencies Legal Proceedings The Company has been named a defendant in various legal proceedings arising in the normal course of business. In the opinion of management, based on the advice of legal counsel, the ultimate resolution of these proceedings will not have a material effect on the Company’s Consolidated Financial Statements.
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Derivative Financial Instruments |
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| Summary of Derivative Instruments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Financial Instruments | Derivative Financial Instruments The Company uses derivative financial instruments to manage its interest rate risk resulting from the differences in the amount, timing, and duration of known or expected cash receipts and known or expected cash payments. Additionally, the Company enters into interest rate derivatives and foreign exchange contracts to accommodate the business requirements of its customers (“customer-related positions”) and risk participation agreements entered into as financial guarantees of performance on customer-related interest rate swap derivatives. The Company also enters into residential mortgage loan commitments to fund mortgage loans at specified rates and times in the future and enters into forward sale commitments to sell such residential mortgage loans at specified prices and times in the future, both of which are considered derivative instruments. Following its merger with HarborOne, through which it acquired MSRs that it holds at fair value, the Company enters into interest futures to mitigate the impact of changes in interest rates and interest rate volatility on the fair value of its MSRs. Changes in fair value are reflected in current period earnings in mortgage banking income. The interest rate futures are settled to market on a daily basis. Derivative instruments are carried at fair value in the Company’s Consolidated Financial Statements. The accounting for changes in the fair value of a derivative instrument is dependent upon whether or not the instrument qualifies as a hedge for accounting purposes, and further, by the type of hedging relationship. By using derivatives, the Company is exposed to credit risk to the extent that counterparties to the derivative contracts do not perform as required. Should a counterparty fail to perform under the terms of a derivative contract, the Company’s credit exposure on interest rate swaps is limited to the net positive fair value and accrued interest of all swaps with each counterparty plus any initial margin collateral posted. The Company seeks to minimize counterparty credit risk through credit approvals, limits, monitoring procedures, and obtaining collateral, where appropriate. As such, management believes the risk of incurring credit losses on derivative contracts with those counterparties is remote. The Company’s discounting methodology and interest calculation of cash margin uses the Secured Overnight Financing Rate, or SOFR, for U.S. dollar cleared interest rate swaps. Interest Rate Positions An interest rate swap is an agreement whereby one party agrees to pay a floating rate of interest on a notional principal amount in exchange for receiving a fixed rate of interest on the same notional amount, for a predetermined period of time, from a second party. The amounts relating to the notional principal amount are not actually exchanged. The Company has entered into interest rate swaps in which it pays floating and receives fixed interest in order to manage its interest rate risk exposure to the variability in interest cash flows on certain floating-rate loans. Such interest rate swaps include those which effectively convert the floating rate one-month SOFR or overnight indexed swap rate, or prime rate interest payments received on the loans to a fixed rate and consequently reduce the Company’s exposure to variability in short-term interest rates. For interest rate swaps that are accounted for as cash flow hedges, changes in fair value are included in other comprehensive income and reclassified into net income in the same period or periods during which the hedged forecasted transaction affects net income. The following tables reflect the Company’s derivative positions for interest rate swaps which qualify as cash flow hedges for accounting purposes as of the dates indicated:
(1)The fair value included a net accrued interest payable balance of $0.6 million as of December 31, 2025. In addition, the fair value includes netting adjustments which represent the amounts recorded to convert derivative assets and liabilities cleared through the CME from a gross basis to a net basis in accordance with applicable accounting guidance.
(1)The fair value included a net accrued interest payable balance of $1.6 million as of December 31, 2024. In addition, the fair value includes netting adjustments which represent the amounts recorded to convert derivative assets and liabilities cleared through the CME from a gross basis to a net basis in accordance with applicable accounting guidance. The maximum amount of time over which the Company is currently hedging its exposure to the variability in future cash flows of forecasted transactions related to the receipt of variable interest on existing financial instruments is 1.7 years. The Company expects approximately $5.0 million will be reclassified into interest income, as a reduction of such income, from other comprehensive income related to the Company’s active cash flow hedges in the next 12 months as of December 31, 2025. The reclassification is due to anticipated net payments on the swaps based upon the forward curve as of December 31, 2025. The Company discontinues cash flow hedge accounting if it is probable that the forecasted hedged transactions will not occur in the initially identified time period. At such time, the associated gains and losses deferred in accumulated other comprehensive income (“AOCI”) are reclassified immediately into earnings and any subsequent changes in the fair value of such derivatives are recognized directly in earnings. The following table presents the pre-tax impact of terminated cash flow hedges on AOCI for the periods indicated:
Customer-Related Positions Interest rate swaps offered to commercial customers do not qualify as hedges for accounting purposes. These swaps allow the Company to retain variable rate commercial loans while allowing the commercial customer to synthetically fix the loan rate by entering into a variable-to-fixed rate interest rate swap. The Company believes that its exposure to commercial customer derivatives is limited to non-performance by either the customer or the dealer because these contracts are simultaneously matched at inception with an offsetting transaction. Risk participation agreements are entered into as financial guarantees of performance on interest rate swap derivatives. The purchased (asset) or sold (liability) guarantee allow the Company to participate-out (fee paid) or participate-in (fee received) the risk associated with certain derivative positions executed with the borrower by the lead bank in a customer-related interest rate swap derivative. Foreign exchange contracts consist of those offered to commercial customers and those entered into to hedge the Company’s foreign currency risk associated with a foreign-currency loan. Neither qualifies as a hedge for accounting purposes. These commercial customer derivatives are offset with matching derivatives with correspondent-bank counterparties in order to minimize foreign exchange rate risk to the Company. Exposure with respect to these derivatives is largely limited to non-performance by either the customer or the other counterparty. Neither the Company nor the correspondent-bank counterparty are required to post collateral but each has established foreign-currency transaction limits to manage the exposure risk. The Company requires its customers to post collateral to minimize risk exposure. The following tables present the Company’s customer-related derivative positions as of the dates indicated below for those derivatives not designated as hedging:
The level of interest rate swaps, risk participation agreements and foreign currency exchange contracts at the end of each period noted above was commensurate with the activity throughout those periods. The table below presents the fair value of the Company’s derivative financial instruments, as well as their classification on the Consolidated Balance Sheets for the periods indicated:
The table below presents the net effect of the Company’s derivative financial instruments on the Consolidated Statements of Income as well as the effect of the Company’s derivative financial instruments included in other comprehensive income (“OCI”) as follows:
The Company has agreements with its customer-related interest rate swap derivative counterparties that contain a provision whereby if the Company defaults on any of its indebtedness, including default where repayment of the indebtedness has not been accelerated by the lender, then the Company could also be declared in default on its derivative obligations. The Company also has agreements with certain of its customer-related interest rate swap derivative correspondent-bank counterparties that contain a provision whereby if the Company fails to maintain its status as a well-capitalized institution, then the counterparty could terminate the derivative positions and the Company would be required to settle its obligations under the agreements. The Company’s exposure related to its customer-related interest rate swap derivatives consists of exposure on cleared derivative transactions and exposure on non-cleared derivative transactions. Cleared derivative transactions are with the Chicago Mercantile Exchange, or CME, and exposure is settled to market daily, with additional credit exposure related to initial-margin collateral pledged to CME at trade execution. At December 31, 2025 and 2024, the Company had exposure to CME for settled variation margin in excess of the customer-related and non-customer-related interest rate swap termination values of $0.2 million and $0.1 million, respectively. In addition, at December 31, 2025 and 2024, the Company had posted initial-margin collateral in the form of U.S. Treasury notes amounting to $40.3 million and $88.0 million, respectively, to CME for these derivatives. The U.S. Treasury notes were considered restricted assets and were included in available for sale securities within the Company’s Consolidated Balance Sheets. As of both December 31, 2025 and 2024 there were no customer-related interest rate swap derivatives with credit-risk contingent features in a net liability position. The Company has minimum collateral posting thresholds with its customer-related interest rate swap derivative correspondent-bank counterparties to the extent that the Company has a liability position with the correspondent-bank counterparties. As of both December 31, 2025 and 2024, the Company was not required to post cash collateral for interest rate swaps with correspondent-bank counterparties. If the Company had breached any of these provisions at December 31, 2025 or 2024, it would have been required to settle its obligations under the agreements at the termination value. In addition, the Company had cross-default provisions with its commercial customer loan agreements which provide cross-collateralization with the customer loan collateral. Mortgage Banking Derivatives The Company enters into residential mortgage loan commitments in connection with its consumer mortgage banking activities to fund mortgage loans at specified rates and times in the future. In addition, the Company enters into forward sale commitments to sell such residential mortgage loans at specified prices and times in the future. These commitments are short-term in nature and generally expire in 30 to 60 days. The residential mortgage loan commitments that relate to the origination of mortgage loans that will be held for sale and the related forward sale commitments are considered derivative instruments under ASC Topic 815, “Derivatives and Hedging” and are reported at fair value. Changes in fair value are reported in earnings and included in other non-interest income on the Consolidated Statements of Income. As of December 31, 2025 and 2024, the Company had an outstanding notional balance of residential mortgage loan origination commitments of $37.8 million and $15.7 million, respectively, and forward sale commitments of $35.9 million and $6.4 million, respectively. During the years ended December 31, 2025, 2024 and 2023, net gains/losses recorded by the Company related to the change in fair value of commitments to originate and sell mortgage loans were not significant. In addition, the aggregate fair value of the Company’s mortgage banking derivative asset and liability as of December 31, 2025 was $0.5 million and $0.1 million, respectively. The aggregate fair value of the Company’s mortgage banking derivative asset and liability as of December 31, 2024 was not significant. Mortgage banking derivative assets and liabilities are included in other assets and other liabilities, respectively, on the Consolidated Balance Sheets. Residential mortgages sold are generally sold with servicing rights released. Mortgage banking derivatives do not qualify as hedges for accounting purposes. As of December 31, 2025, the Company had interest rate futures with a notional value of $45.2 million. Such interest rate futures had no fair value recorded on the Company’s Consolidated Balance Sheets as they settle to market daily. The Company did not have any interest rate futures as of December 31, 2024.
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Balance Sheet Offsetting |
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| Offsetting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Balance Sheet Offsetting | Balance Sheet Offsetting Certain financial instruments, including derivatives, may be eligible for offset in the Consolidated Balance Sheets and/or subject to master netting arrangements or similar agreements. The Company’s derivative transactions with upstream financial institution counterparties are generally executed under International Swaps and Derivative Association master agreements which include “right of set-off” provisions. In such cases there is generally a legally enforceable right to offset recognized amounts. However, the Company does not offset fair value amounts recognized for derivative instruments. The Company nets the amount recognized for the right to reclaim cash collateral against the obligation to return cash collateral arising from derivative instruments executed with the same counterparty under a master netting arrangement. Collateral legally required to be maintained at dealer banks by the Company is monitored and adjusted as necessary. As of December 31, 2025 and 2024, it was determined that no additional collateral would have to be posted to immediately settle these instruments. The following tables present the Company’s asset and liability positions that were eligible for offset and the potential effect of netting arrangements on its financial position, as of the dates indicated:
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Fair Value of Assets and Liabilities |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value of Assets and Liabilities | Fair Value of Assets and Liabilities The Company uses fair value measurements to record adjustments to certain assets and liabilities and to determine fair value disclosures. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company’s various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. Fair value is a market-based measure considered from the perspective of a market participant rather than an entity-specific measure. Therefore, even when market assumptions are not readily available, the Company’s own assumptions are set to reflect those that the Company believes market participants would use in pricing the asset or liability at the measurement date. The Company uses prices and inputs that are current as of the measurement date, including during periods of market dislocation. In periods of market dislocation, the observability of prices and inputs may be reduced for many instruments. This condition could cause an instrument to be reclassified from Level 1 to Level 2 or from Level 2 to Level 3. Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no active market exists for a portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment, and therefore cannot be determined with precision. Changes in assumptions could significantly affect these estimates. The following methods and assumptions were used by the Company in estimating fair value disclosures: Cash and Cash Equivalents For these financial instruments, which have original maturities of 90 days or less, their carrying amounts reported in the Consolidated Balance Sheets approximate fair value. Securities Securities consisted of U.S. Treasury securities, U.S. government-sponsored residential and commercial mortgage-backed securities, state and municipal bonds, and corporate bonds as of December 31, 2025. Securities consisted of U.S. Treasury securities, U.S. Agency bonds, U.S. government-sponsored residential and commercial mortgage-backed securities, and state and municipal bonds as of December 31, 2024. AFS securities are recorded at fair value. The Company’s U.S. Treasury securities are traded on active markets and therefore these securities were classified as Level 1. The fair value of U.S. Agency bonds, at December 31, 2024, were evaluated using relevant trade data, benchmark quotes and spreads obtained from publicly available trade data, and generated on a price, yield or spread basis as determined by the observed market data. Therefore, these securities were categorized as Level 2 given the use of observable inputs. The fair value of U.S. government-sponsored residential and commercial mortgage-backed securities were estimated using either a matrix or benchmarks. The inputs used include benchmark yields, reported trades, broker/dealer quotes, and issuer spreads. Therefore, these securities were categorized as Level 2 given the use of observable inputs. The fair value of state and municipal bonds were estimated using a valuation matrix with inputs including observable bond interest rate tables, recent transactions, and yield relationships. Therefore, these securities were categorized as Level 2 given the use of observable inputs. The fair value of corporate bonds was estimated based upon reported trades and quoted market prices. Therefore, these securities were categorized as Level 2 given the use of observable inputs. Fair value was based on the value of one unit without regard to any premium or discount that may result from concentrations of ownership of a financial instrument, possible tax ramifications, or estimated transaction costs. Loans Held for Sale The fair value of loans held for sale, whose carrying amounts approximate fair value, was estimated using the anticipated market price based upon pricing indications provided by investor banks. These assets were classified as Level 2 given the use of observable inputs. Loans The fair value of commercial construction, commercial and industrial lines of credit, and certain other consumer loans was estimated by discounting the contractual cash flows using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. For commercial, commercial real estate, residential real estate, automobile, and consumer home equity loans, fair value was estimated by discounting contractual cash flows adjusted for prepayment estimates using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. Loans are classified as Level 3 since the valuation methodology utilizes significant unobservable inputs. Loans that are deemed to be collateral-dependent, as described in Note 2, “Summary of Significant Accounting Policies” were recorded at the fair value of the underlying collateral. FHLB Stock The fair value of FHLB stock approximates the carrying amount based on the redemption provisions of the FHLB. These assets were classified as Level 2. Rabbi Trust and Deferred Compensation Plan Investments Rabbi trust and deferred compensation plan investments consisted primarily of cash and cash equivalents, U.S. government agency obligations, equity securities, mutual funds and other exchange-traded funds, and were recorded at fair value and included in other assets. The purpose of these investments is to fund certain executive non-qualified retirement benefits and deferred compensation. The fair value of other U.S. government agency obligations were estimated using either a matrix or benchmarks. The inputs used include benchmark yields, reported trades, broker/dealer quotes, and issuer spreads. These securities were categorized as Level 2 given the use of observable inputs. The equity securities, mutual funds and other exchange-traded funds were valued based on quoted prices from the market. The equities, mutual funds and exchange-traded funds traded in an active market were categorized as Level 1 as they were valued based upon quoted prices from the market. Mutual funds at net asset value amounted to $57.1 million and $54.1 million at December 31, 2025 and 2024, respectively. There were no redemption restrictions on these mutual funds at the end of any period presented. Bank-Owned Life Insurance The fair value of bank-owned life insurance was based upon quotations received from bank-owned life insurance dealers. These assets were classified as Level 2 given the use of observable inputs. MSRs MSRs do not trade in an active, open market with readily observable prices. While sales of MSRs do occur, the precise terms and conditions typically are not readily available. Accordingly, the Company estimates the fair value of mortgage servicing rights based on a third-party valuation model that calculates the present value of estimated future net servicing income with certain unobservable inputs such as prepayment speeds and default and loss rates. MSRs were classified as Level 3 given the use of significant unobservable inputs. Deposits The fair value of deposits with no stated maturity, such as noninterest-bearing demand deposits, savings, interest checking accounts, and money market accounts, was equal to their carrying amount. The fair value of time deposits was based on the discounted value of contractual cash flows using current market interest rates. Deposits were classified as Level 2 given the use of observable market inputs. The fair value estimates of deposits do not include the benefit that results from the low-cost funding provided by the deposit liabilities compared to the cost of borrowing funds in the wholesale market (core deposit intangibles). FHLB Advances The fair value of FHLB advances was based on the discounted value of contractual cash flows. The discount rates used are representative of approximate rates currently offered on instruments with similar remaining maturities. FHLB advances were classified as Level 2. Interest Rate Swap Collateral Funds The fair value of interest rate swap collateral funds approximates the carrying amount. Interest rate swap collateral funds were classified as Level 2. Interest Rate Swaps The fair value of interest rate swaps was determined using discounted cash flow analysis on the expected cash flows of the interest rate swaps. This analysis reflects the contractual terms of the interest rate swaps, including the period of maturity, and uses observable market-based inputs, including interest rate curves and implied volatility. In addition, for customer-related interest rate swaps, the analysis reflects a credit valuation adjustment to reflect the Company’s own non-performance risk and the respective counterparty’s non-performance risk in the fair value measurements. The majority of inputs used to value the Company’s interest rate swaps fall within Level 2 of the fair value hierarchy, but the credit valuation adjustments associated with the interest rate swaps utilize Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by the Company and its counterparties. However, at December 31, 2025 and 2024, the impact of the Level 3 inputs on the overall valuation of the interest rate swaps was deemed insignificant to the overall valuation. As a result, the interest rate swaps were categorized as Level 2 within the fair value hierarchy. Risk Participations The fair value of risk participations was determined based upon the total expected exposure of the derivative which considers the present value of cash flows discounted using market-based inputs and were therefore categorized as Level 2 within the fair value hierarchy. The fair value also included a credit valuation adjustment which evaluates the credit risk of its counterparties by considering factors such as the likelihood of default by the counterparties, its net exposures, the remaining contractual life, as well as the amount of collateral securing the position. The change in value of derivative assets and liabilities attributable to credit risk was not significant during the reported periods. Foreign Currency Forward Contracts The fair values of foreign currency forward contracts were based upon the remaining expiration period of the contracts and bid quotations received from foreign exchange contract dealers and were categorized as Level 2 within the fair value hierarchy. Mortgage Derivatives The fair value of mortgage derivatives was determined based upon current market prices for similar assets in the secondary market and, therefore, are classified as Level 2 within the fair value hierarchy. Fair Value of Assets and Liabilities Measured on a Recurring Basis The following tables present the balances of assets and liabilities measured at fair value on a recurring basis as of December 31, 2025 and 2024:
(1)Refer to Note 5, “Mortgage Banking” for further discussion regarding valuation inputs.
There were no transfers to or from Level 1, 2 and 3 during the years ended December 31, 2025 and 2024. The Company held no assets or liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) as of December 31, 2024. Fair Value of Assets and Liabilities Measured on a Nonrecurring Basis The Company may also be required, from time to time, to measure certain other assets on a nonrecurring basis in accordance with generally accepted accounting principles. The following tables summarize the fair value of assets and liabilities measured at fair value on a nonrecurring basis, as of December 31, 2025 and 2024.
For the valuation of the collateral-dependent loans, the Company relies primarily on third-party valuation information from certified appraisers, and values are generally based upon recent appraisals of the underlying collateral, brokers’ opinions based upon recent sales of comparable properties, estimated equipment auction or liquidation values, income capitalization, or a combination of income capitalization and comparable sales. Depending on the type of underlying collateral, valuations may be adjusted by management for qualitative factors such as economic factors and estimated liquidation expenses. The range of these possible adjustments may vary. Disclosures about Fair Value of Financial Instruments The estimated fair values and related carrying amounts for assets and liabilities for which fair value is only disclosed are shown below as of the dates indicated:
This summary excludes certain financial assets and liabilities for which the carrying value approximates fair value. For financial assets, these may include cash and due from banks, federal funds sold and short-term investments. For financial liabilities, these may include federal funds purchased. These instruments would all be considered to be classified as Level 1 within the fair value hierarchy. Also excluded from the summary are financial instruments measured at fair value on a recurring and nonrecurring basis, as previously described.
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| Revenue from Contracts with Customers | Revenue from Contracts with Customers Revenue from contracts with customers within the scope of ASC 606, Revenue from Contracts with Customers (Topic 606) (“ASC 606”) is recognized when control of goods or services is transferred to the customer, in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods and services. The Company considers the terms of the contract and all relevant facts and circumstances when applying this guidance. The Company measures revenue and timing of recognition by applying the following five steps: 1.Identify the contract(s) with the customers. 2.Identify the performance obligations. 3.Determine the transaction price. 4.Allocate the transaction price to the performance obligations. 5.Recognize revenue when (or as) the entity satisfies a performance obligation. The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties are identified, payment terms are identified, the contract has commercial substance and collectability of consideration is probable. The information presented within this Note excludes discontinued operations with respect to the year ended December 31, 2023. Refer to Note 24, “Discontinued Operations” for further discussion regarding discontinued operations. Performance obligations The Company’s performance obligations are generally satisfied either at a point in time or over time, as services are rendered. Unsatisfied performance obligations at the report date are not material to the Company’s Consolidated Financial Statements. A portion of the Company’s noninterest (loss) income is derived from contracts with customers within the scope of ASC 606. The Company has disaggregated such revenues by type of service, as presented in the table below. These categories reflect how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors.
Additional information related to each of the revenue streams is further noted below. Investment Advisory Fees The Company offers investment management and trust services to individuals, institutions, small businesses and charitable institutions. Each investment management product is governed by its own contract along with a separate identifiable fee schedule unique to that product. The Company also offers additional services, such as estate settlement, financial planning, tax services, and other special services quoted at the customer’s request. The asset management and/or custody fees are primarily based upon a percentage of the monthly valuation of the principal assets in the customer’s account. Customers are also charged a base fee which is prorated over a twelve-month period. Fees for additional or special services are generally fixed in nature and are charged as services are rendered. All revenue is recognized in correlation to the monthly management fee determinations or as transactional services are provided. Investment advisory fees earned but not yet received amounted to $6.3 million and $5.7 million as of December 31, 2025 and December 31, 2024, respectively. Deposit Service Charges The Company offers various deposit account products to its customers governed by specific deposit agreements applicable to either personal customers or business customers. These agreements identify the general conditions and obligations of both parties and include standard information regarding deposit account-related fees. Deposit account services include providing access to deposit accounts as well as access to the various deposit transactional services of the Company. These transactional services are primarily those that are identified in the standard fee schedule, and include, but are not limited to, services such as overdraft protection, wire transfer, and check collection. The Company may charge monthly fixed service fees associated with the customer having access to the deposit account as well as separate fixed fees associated with and at the time specific transactions are entered into by the customer. As such, the Company considers that its performance obligations are fulfilled when customers are provided deposit account access or when the requested deposit transaction is completed. Cash management services are a subset of the deposit service charges revenue stream. These services include automated clearing house, or ACH, transaction processing, positive pay, lockbox, and remote deposit services. These services are also governed by separate agreements entered into by the customer. The fee arrangement for these services is structured as a fixed fee per transaction which may be offset by earnings credits. An earnings credit is a discount that a customer receives based upon the investable balance in the applicable covered deposit account(s) for a given month. Earnings credits are only good for the given month. That is, if cash management fees for a given month are less than the month’s earnings credit, the remainder of the credit does not carry over to the following month. Cash management fees are recognized as revenue in the month that the services are provided. Cash management fees earned but not yet received amounted to $1.6 million at both December 31, 2025 and 2024, and were included in other assets on the Consolidated Balance Sheets. Card Income The Company provides debit cards to its customers which are authorized and settled through various card payment networks, and in exchange, the Company earns revenue as determined by each payment network’s interchange program. Regardless of the network that is utilized to authorize and settle the payment, the merchant that provides the product or service to the debit card holder is ultimately responsible for the interchange payment to the Company. Debit card processing fees are recognized as card transactions are settled within each network. In addition, the Company receives income for credit card referrals from third party credit card providers, which it offers to its customers. Card income fees earned but not yet received amounted to $1.1 million and $1.2 million, as of December 31, 2025 and 2024, respectively, and were included in other assets on the Consolidated Balance Sheets. Other Noninterest Income The Company earns various types of other noninterest income that have been aggregated into one general revenue stream in the table noted above. Noninterest income in-scope of ASC 606 includes, but is not limited to, the following types of revenue with customers: safe deposit rent, ATM surcharge fees and customer checkbook fees. Individually, these sources of noninterest income are not material.
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Other Comprehensive Income |
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| Statement of Other Comprehensive Income [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Comprehensive Income | Other Comprehensive Income The following tables present a reconciliation of the changes in the components of other comprehensive income (loss) for the dates indicated including the amount of income tax (expense) benefit allocated to each component of other comprehensive income (loss):
The following table illustrates the changes in the balances of each component of accumulated other comprehensive income (loss), net of tax:
The following table illustrates the significant amounts reclassified out of each component of accumulated other comprehensive (loss)/income, net of tax:
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Discontinued Operations |
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| Discontinued Operations | Discontinued Operations On September 19, 2023, the Company announced that it had entered into an asset purchase agreement (“the agreement”) with Arthur J. Gallagher & Co. (“Gallagher”) to sell substantially all of the assets of its insurance agency business for a gross purchase price of $515.0 million. The agreement also provided for the assumption of certain liabilities of the insurance agency business by Gallagher. Management made the decision to sell certain assets of its insurance agency business to recognize the valuation premium of the business, while allowing the Company to focus on growth and strategic initiatives of its core banking business. In September 2023, following the approval of the sale by the Company’s board of directors, the Company reclassified substantially all of the assets and certain liabilities of its insurance agency business as held for sale in connection with a planned disposition of the business. A business is classified as held for sale when management, having the authority to approve the action, commits to a plan to sell the business, the sale is probable to occur during the next 12 months at a price that is reasonable in relation to its current fair value, and certain other criteria are met. In accordance with ASC 205, Presentation of Financial Statements, the Company classifies operations as discontinued when they meet all the criteria to be classified as held for sale and when the sale represents a strategic shift that will have a major impact on the Company’s financial condition and results of operations. On October 31, 2023, the Company completed the sale of its insurance agency business for net cash consideration at closing of $498.1 million, subject to customary post-closing working capital adjustments. The net cash proceeds at closing included the gross purchase price pursuant to the agreement of $515.0 million and an estimated working capital adjustment of $4.2 million, which were reduced by transaction expenses of $17.0 million and the settlement of certain obligations of the Company primarily related to employee post-retirement liabilities that originated prior to closing of $4.1 million. In addition, the Company transferred $7.4 million in fiduciary cash to Gallagher upon closing which is included in the determination of the gain on sale as of December 31, 2023 but was not included in the amount of net cash consideration of $498.1 million. In connection with the sale, the Company recognized a gain on sale of $408.6 million, which was subject to certain post-closing adjustments during the 120 day post-closing settlement period which ended on February 28, 2024. The amount of the post-closing settlement was not material. In addition, the Company recognized indirect noninterest expenses associated with the sale of approximately $22.3 million. The following presents operating results of the discontinued insurance agency business for the periods indicated:
(1)Represents net income from discontinued operations that is presented in the Consolidated Statements of Income. Certain income and expense amounts were excluded from discontinued operations as they relate to assets and liabilities which were not assumed by Gallagher. The following is a summary of such items and the corresponding income tax effect for the periods indicated:
(1)Includes income on Company-owned life insurance policies which were not disposed of and were transferred into the Bank upon dissolution of Eastern Insurance Group. (2)Includes expenses associated with certain employee post-retirement benefit plan expenses. (3)Includes depreciation expense associated with buildings and related improvements and ROU asset amortization related to one lease which were not disposed of and were transferred to the Bank as of January 1, 2024. (4)Includes intercompany expenses and other credits associated with the Defined Benefit Plan and the BEP. Components of net periodic benefit cost associated with the Defined Benefit Plan and the BEP included in other noninterest expense above were a net credit for the periods presented. Continuing Involvement Pursuant to the agreement, the Company agreed to provide certain transitional services to Gallagher for up to six months following the closing of the sale. Such services included certain information and technology support and human resources support. The Company was compensated for such services on a monthly basis, and the total compensation over the six month period plus reimbursement of amounts paid by the Company in connection with its performance of the transitional services was not material. Leases During the year ended December 31, 2023, upon reclassification of the above assets and liabilities to assets and liabilities of discontinued operations, the Company re-assessed the ROU assets of certain leases, which were assumed by Gallagher upon closing, and made the decision to abandon certain leases which were not assumed by Gallagher and for which Eastern Insurance Group was the lessee. The Company retained one lease for which Eastern Insurance Group was lessee at the time of closing. Following the sale, the lease was partially sublet to Gallagher and Eastern Insurance Group’s obligation was transferred to the Bank upon dissolution of Eastern Insurance Group. As of December 31, 2023, the ROU asset and lease liability for such lease was $0.5 million and $0.3 million, respectively. During the year ended December 31, 2023, the Company remeasured the present value of the future lease payments related to each lease for which Eastern Insurance Group was the lessee which resulted in a net reduction of the lease liabilities and a corresponding net reduction of the lease ROU assets of $6.4 million. The Company recorded an impairment charge of $2.0 million related to leases which were terminated early following the closing of the asset sale. The impairment charge was included in net income from discontinued operations for the year ended December 31, 2023. Revenue Recognition - Insurance Commissions The Company acted as an agent in offering property, casualty, and life and health insurance to both commercial and consumer customers though Eastern Insurance Group. The Company also earned additional commissions from the insurers based upon meeting certain criteria, such as premium levels, growth rates, new business volume and loss experience. The Company recognized commission revenues when earned based upon the effective date of the policy or when services were rendered. Certain revenues were deferred to reflect delivery of services over the contract period. Upon the transfer of Eastern Insurance Group’s assets to Gallagher, which occurred on October 31, 2023, the Company ceased to offer insurance products and services and thus no longer receives insurance-related commissions and revenues. The Company earned a fixed commission rate on the sales of these products and services. Commissions were earned on the contract effective date and generally were based upon a percentage of premiums for insurance coverage. Commission rates depended upon a large number of factors, including the type of risk being placed, the particular underwriting enterprise’s demand, the expected loss experience of the particular risk coverage, and historical benchmarks surrounding the level of effort necessary for the Company to place and service the insurance contract. The vast majority of the Company’s services and revenues were associated with the placement of an insurance contract. The Company also earned profit-sharing revenues, also referred to as contingency revenue, from the insurers with whom the Company placed business. These profit-sharing revenues were performance bonuses from the insurers based upon certain performance metrics such as floors on written premiums, loss rates, and growth rates. These amounts were in excess of the commission revenues discussed above, and not all business placed with underwriting enterprises was eligible for contingent revenues. Contingent revenues were variable and generally based upon the Company’s expectation of the ultimate profit-sharing revenue amounts to be earned and varied from period to period. The Company’s contracts were generally calendar year contracts whereby revenues from underwriting enterprises were received in the calendar year following placement, generally the first and second quarters, after verification of the performance indicators outlined in the contracts. Accordingly, during each reporting period, management made its best estimate of the amounts that had been earned using historical averages and other factors to project revenues. The Company based its estimates each period on a contract-by-contract basis. As estimates could have changed significantly from period to period, the Company did not recognize this revenue until it had concluded that, based upon all the facts and information available, it was probable that a significant revenue reversal would not occur in a future period.
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| Condensed Financial Information Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Parent Company Financial Statements | Parent Company Financial Statements Condensed financial information relative to Eastern Bankshares Inc.’s (“the parent company”) balance sheets at December 31, 2025 and 2024 and the related statements of income and cash flows for the years ended December 31, 2025, 2024 and 2023 are presented below. The statement of shareholders’ equity is not presented below as the parent company’s shareholders’ equity is that of the consolidated Company.
(1)Includes $195.0 million and $185.0 million that is eliminated in consolidation as of December 31, 2025 and 2024, respectively.
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Related Parties |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Related Party Transactions [Abstract] | |
| Related Parties | Related Parties The Company has, and expects to have in the future, related party transactions in the ordinary course of business. The transactions include, but are not limited to, lending activities and deposit services with directors and executive officers of the Company and their affiliates. Based on the Company’s assessment, such transactions are consistent with prudent banking practices and are within applicable banking regulations. During the years ended December 31, 2025, 2024 and 2023, no such transactions involved amounts in excess of 5% of the Company’s total shareholders’ equity.
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Segment Reporting |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Segment Reporting [Abstract] | |
| Segment Reporting | Segment Reporting An operating segment is defined as a component of a business for which separate financial information is available that is evaluated regularly by the CODM in deciding how to allocate resources and evaluate performance. The Company has determined that its CODM is its Executive Chair. The Company has one reportable segment: its banking business, which consists of a full range of banking lending, savings, and small business offerings, and its wealth management and trust operations. The CODM makes operating and resource allocation decisions based upon the results of the Company’s core banking business. The core banking business, which is comprised of the commercial group, consumer group, and wealth management components, is managed by the Company’s Executive Chair and resource allocation decisions are made by the CODM as a single operating segment rather than at the individual component level. Each of these components are conducted and financed through banking activities and operations. The core banking business activities are interrelated and viewed by management as a single operating segment. The accounting policies of the banking business segment are the same as those described in the summary of significant accounting policies in Note 2, “Summary of Significant Accounting Policies.” The CODM assesses performance of the banking business segment and decides how to allocate resources based upon net income that is reported on the Consolidated Statements of Income as net income. The measure of segment assets is reported on the Consolidated Balance Sheets as total assets. The CODM uses net income to evaluate income generated from segment assets in deciding whether to reinvest profits into the banking business segment or into other parts of the Company, such as for acquisitions, to pay dividends, or to repurchase outstanding shares. Net income is used to monitor budget versus actual results. The CODM also uses net income in competitive analysis by benchmarking to the Company’s competitors. The competitive analysis along with the monitoring of budgeted versus actual results are used in assessing performance of the segment and in establishing management’s compensation. The Company does not have intra-entity sales. The CODM uses consolidated profit and loss measures which are presented on the Company’s Consolidated Statements of Income. Therefore, refer to the Consolidated Statements of Income for quantitative information regarding the banking business segment operating results. The segment operating results include certain other segment items which are included in other noninterest expense within the Consolidated Statements of Income. Significant expense items included in the other noninterest expense line include operational losses, which are primarily comprised of debit card and bad check losses, liability insurance expense, and other loan expenses, which are primarily comprised of legal collection fees and certain origination and servicing-related expenses. The CODM reviews such amounts as a whole in their review of segment operating results.
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Insider Trading Arrangements |
3 Months Ended |
|---|---|
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Dec. 31, 2025
shares
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| Trading Arrangements, by Individual | |
| Non-Rule 10b5-1 Arrangement Adopted | false |
| Rule 10b5-1 Arrangement Terminated | false |
| Non-Rule 10b5-1 Arrangement Terminated | false |
| Luis A. Borgen [Member] | |
| Trading Arrangements, by Individual | |
| Material Terms of Trading Arrangement | Director Luis A. Borgen adopted a trading arrangement intended to satisfy the affirmative defense conditions of the SEC’s Rule 10b5-1(c) on November 27, 2024. Mr. Borgen’s plan provided for the sale of up to 13,696 shares of Company common stock beginning on May 13, 2025 and expired by its terms on December 31, 2025.
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| Name | Luis A. Borgen |
| Title | Director |
| Rule 10b5-1 Arrangement Adopted | true |
| Adoption Date | November 27, 2024 |
| Expiration Date | December 31, 2025 |
| Arrangement Duration | 232 days |
| Aggregate Available | 13,696 |
Insider Trading Policies and Procedures |
12 Months Ended |
|---|---|
Mar. 31, 2024 | |
| Insider Trading Policies and Procedures [Line Items] | |
| Insider Trading Policies and Procedures Adopted | true |
Cybersecurity Risk Management and Strategy Disclosure |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Cybersecurity Risk Management, Strategy, and Governance [Line Items] | |
| Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] | We embrace a “defense in depth” approach to assess, identify, and manage cybersecurity threats. A defense in depth approach seeks to implement multiple layers of defenses in order to reduce the risk that a single process or control failure might result in a material incident. We utilize a risk management framework to assess, manage, and report on material risks and threats. In light of the importance of cybersecurity matters, we have developed as part of this framework a risk domain specific to cybersecurity matters, including specifying applicable risk tolerances and metrics. The Executive Vice President, Chief Information Officer (CIO), who has served in information technology leadership roles with the Company since 2007 and has over 20 years of experience with matters related to cybersecurity, including as an executive leader and consultant, and Executive Vice President, Enterprise Risk Management (EVP, ERM), who has served in risk management leadership roles for the Company since 2015, have oversight over information technology and enterprise risk management matters, respectively, and receive monthly reports on cyber-related metrics and activities from their teams. In addition, we have implemented escalation procedures and protocols, including an incident response team that includes key members of executive management to manage and coordinate responses to potentially significant cybersecurity incidents. Third party vendors are utilized to help validate our security posture and controls, and we have developed a third party vendor management program to assess and monitor risks arising from third party vendor systems. |
| Cybersecurity Risk Management Processes Integrated [Flag] | true |
| Cybersecurity Risk Management Processes Integrated [Text Block] | We embrace a “defense in depth” approach to assess, identify, and manage cybersecurity threats. A defense in depth approach seeks to implement multiple layers of defenses in order to reduce the risk that a single process or control failure might result in a material incident. We utilize a risk management framework to assess, manage, and report on material risks and threats. In light of the importance of cybersecurity matters, we have developed as part of this framework a risk domain specific to cybersecurity matters, including specifying applicable risk tolerances and metrics. |
| Cybersecurity Risk Management Third Party Engaged [Flag] | true |
| Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] | true |
| Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] | false |
| Cybersecurity Risk Board of Directors Oversight [Text Block] | The Risk Management Committee of our Board of Directors has responsibility for oversight of the design, implementation, and operation of our enterprise risk management framework, including review and approval of risk management policies and review of our monitoring of risk, the effectiveness of its risk management processes, and material changes in risk. As part of this enterprise risk management oversight, our management team and subject matter experts provide quarterly reporting on our cybersecurity risk domain to the Risk Management Committee. The Risk Management Committee in turn reports on significant enterprise risk management issues to the Board of Directors. |
| Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] | The Risk Management Committee of our Board of Directors has responsibility for oversight of the design, implementation, and operation of our enterprise risk management framework, including review and approval of risk management policies and review of our monitoring of risk, the effectiveness of its risk management processes, and material changes in risk. As part of this enterprise risk management oversight, our management team and subject matter experts provide quarterly reporting on our cybersecurity risk domain to the Risk Management Committee. |
| Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] | The Risk Management Committee of our Board of Directors has responsibility for oversight of the design, implementation, and operation of our enterprise risk management framework, including review and approval of risk management policies and review of our monitoring of risk, the effectiveness of its risk management processes, and material changes in risk. As part of this enterprise risk management oversight, our management team and subject matter experts provide quarterly reporting on our cybersecurity risk domain to the Risk Management Committee. The Risk Management Committee in turn reports on significant enterprise risk management issues to the Board of Directors. |
| Cybersecurity Risk Role of Management [Text Block] | The Executive Vice President, Chief Information Officer (CIO), who has served in information technology leadership roles with the Company since 2007 and has over 20 years of experience with matters related to cybersecurity, including as an executive leader and consultant, and Executive Vice President, Enterprise Risk Management (EVP, ERM), who has served in risk management leadership roles for the Company since 2015, have oversight over information technology and enterprise risk management matters, respectively, and receive monthly reports on cyber-related metrics and activities from their teams. In addition, we have implemented escalation procedures and protocols, including an incident response team that includes key members of executive management to manage and coordinate responses to potentially significant cybersecurity incidents. |
| Cybersecurity Risk Management Positions or Committees Responsible [Flag] | true |
| Cybersecurity Risk Management Positions or Committees Responsible [Text Block] | The Executive Vice President, Chief Information Officer (CIO), who has served in information technology leadership roles with the Company since 2007 and has over 20 years of experience with matters related to cybersecurity, including as an executive leader and consultant, and Executive Vice President, Enterprise Risk Management (EVP, ERM), who has served in risk management leadership roles for the Company since 2015, have oversight over information technology and enterprise risk management matters, respectively, and receive monthly reports on cyber-related metrics and activities from their teams. |
| Cybersecurity Risk Management Expertise of Management Responsible [Text Block] | The Executive Vice President, Chief Information Officer (CIO), who has served in information technology leadership roles with the Company since 2007 and has over 20 years of experience with matters related to cybersecurity, including as an executive leader and consultant, and Executive Vice President, Enterprise Risk Management (EVP, ERM), who has served in risk management leadership roles for the Company since 2015, have oversight over information technology and enterprise risk management matters, respectively, and receive monthly reports on cyber-related metrics and activities from their teams. |
| Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] | The Risk Management Committee in turn reports on significant enterprise risk management issues to the Board of Directors. |
| Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] | true |
Summary of Significant Accounting Policies (Policies) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Accounting Policies [Abstract] | |
| Basis of Presentation | Basis of Presentation The Company’s Consolidated Financial Statements have been prepared in conformity with accounting principles generally accepted in the United States (“GAAP”) as set forth by the Financial Accounting Standards Board (“FASB”) and its Accounting Standards Codification (“ASC”) and Accounting Standards Updates (“ASU”) as well as the rules and interpretive releases of the SEC under the authority of federal securities laws. The Consolidated Financial Statements include the accounts of the Company, its wholly-owned subsidiaries, and entities in which it holds a controlling financial interest through being the primary beneficiary or through holding a majority of the voting interest. All intercompany accounts and transactions have been eliminated in consolidation. Certain previously reported amounts have been reclassified to conform to the current period’s presentation which includes: •reclassification of escrow deposits of borrowers to savings accounts and the related interest expense from interest on borrowings to interest on deposits; •combination of certain credit card income balances previously included in other noninterest income and debit card processing fees into a new financial statement line item titled “card income;” •reclassification of certain mortgage banking income accounts previously included in “(losses) gains on mortgage loans held for sale, net” and in “other noninterest income” to a new financial statement line item titled “mortgage banking income (loss).” •combination of certain non-operating income accounts previously included in other noninterest income into a new financial statement line item titled “other non-operating income;” •combination of certain non-operating expense accounts previously included in other noninterest expense into a new financial statement line item titled “non-operating expenses;” •reclassification of merger and acquisition expenses previously included in salaries and employee benefits, occupancy and equipment, technology and data processing, professional services, marketing, and other operating expenses into a new financial statement line item titled “non-operating expenses;” and •reclassification of proceeds from sales of loans held for investment and loan purchases to “net increase in outstanding loans.”
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| Use of Estimates | Use of Estimates In preparing the Consolidated Financial Statements in conformity with GAAP, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheets and income and expenses for the periods reported. Actual results could differ from those estimates based on changing conditions, including economic conditions and future events. Material estimates that are particularly susceptible to change relate to the determination of the allowance for loan losses, valuation and fair value measurements, allowance for credit losses on investment securities, the liabilities for benefit obligations (particularly pensions), the provision for income taxes and impairment of goodwill and other intangible assets.
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| Cash and Cash Equivalents | Cash and Cash Equivalents Cash and cash equivalents include cash on hand and amounts due from banks, federal funds sold, and other short-term investments including restricted cash pledged, all of which have an original maturity of 90 days or less.
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| Securities | Securities Debt securities are classified at the time of purchase as either “trading,” “available for sale” (“AFS”) or “held to maturity” (“HTM”). Equity securities are measured at fair value with changes in the fair value recognized through net income. Debt securities that are bought and held principally for the purpose of resale in the near term are classified as trading securities and recorded at fair value, with subsequent changes in fair value included in net income. Debt securities that the Company has the positive intent and the ability to hold to maturity are classified as HTM securities and recorded at amortized cost. Debt securities not classified as either trading or HTM are classified as AFS and recorded at fair value, with changes in fair value excluded from net income and reported in other comprehensive income, net of related tax. Amortization of premiums and accretion of discounts are computed using the effective interest rate method. The Company’s AFS securities are carried at fair value. For AFS securities in an unrealized loss position, management will first evaluate whether there is intent to sell a security, or if it is more likely than not that the Company will be required to sell a security prior to anticipated recovery of its amortized cost basis. If either of these criteria are met, the Company will record a write-down of the security’s amortized cost basis to fair value through income. For those AFS securities which do not meet the intent or requirement to sell criteria, management will evaluate whether the decline in fair value is a result of credit related matters or other factors. In performing this assessment, management considers the creditworthiness of the issuer including whether the security is guaranteed by the U.S. federal government or other government agency, the extent to which fair value is less than amortized cost, and changes in credit rating during the period, among other factors. If this assessment indicates the existence of credit losses, an allowance for credit losses will be established, as determined by a discounted cash flow analysis. To the extent the estimated cash flows do not support the amortized cost, the deficiency is considered to be due to credit loss and is recognized in earnings. The Company measures expected credit losses on AFS securities on a collective basis by major security type. Changes in the allowance for credit losses are recorded as a provision for (or reversal of) credit loss expense. Losses are charged against the allowance when the security is determined to be uncollectible, or when either of the aforementioned criteria surrounding intent or requirement to sell have been met. Gains and losses on sales of securities are recognized at the time of sale on the specific-identification basis.
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| Allowance for Credit Losses - Held to Maturity Securities, Loans Individually Assessed for Impairment, Collateral-Dependent Loans, Modifications of Loans to Borrowers Experiencing Financial Difficulty and Acquired Loans | Allowance for Credit Losses - Held to Maturity Securities The Company measures expected credit losses on HTM securities on a collective basis by major security type which, as of December 31, 2025, included government-sponsored residential, commercial mortgage-backed securities, state and municipal bonds and obligations, and corporate debt bonds. Government-sponsored residential and commercial mortgage-backed securities in the Company’s HTM portfolio are guaranteed by either the U.S. federal government or other government sponsored agencies with a long history of no credit losses. As a result, management has determined that these securities have a zero loss expectation and therefore does not record an allowance for credit losses on these securities. State and municipal bonds and obligations and corporate debt bonds are evaluated periodically to determine if an allowance for credit losses is warranted; however, such securities do not have a history of credit losses. Loans Individually Assessed for Impairment ASC 326 indicates that a loan should be measured for impairment individually if that loan shares no similar risk characteristics with other loans. For the Company, loans which have been identified as those to be individually assessed for impairment under CECL include loans that do not share similar risk characteristics with other loans in the corresponding reserve segment. Characteristics of loans meeting this definition may include, but are not limited to: •Loans determined to be collateral dependent as defined below; •Loans on non-accrual status; •Loans with a risk rating of 12 under the Company’s risk rating scale, substandard (well-defined weakness) or worse; •Loans to borrowers actively involved in bankruptcy proceedings; and •Loans that have been partially charged-off. Collateral-Dependent Loans Management considers a loan to be collateral-dependent when foreclosure of the underlying collateral is probable. In addition, in accordance with ASC 326, the Company elected to apply the collateral-dependent practical expedient whereby the Company measures expected credit losses using the fair value of the collateral, less any estimated costs to sell, when foreclosure is not probable but repayment of the loan is expected to be provided substantially through the operation or sale of the collateral, and the borrower is experiencing financial difficulty. Modifications of Loans to Borrowers Experiencing Financial Difficulty The Company applies the loan refinancing and restructuring guidance codified in paragraphs 310-20-35-9 through 35-11 of the Accounting Standards Codification to determine whether a modification results in a new loan or a continuation of an existing loan. Modifications to borrowers experiencing financial difficulty include principal forgiveness, interest rate reductions, term extensions, other-than-insignificant payment delays and combinations thereof. Expected losses or recoveries related to loans where modifications have been granted to borrowers experiencing financial difficulty have been included in the Company’s determination of the allowance for loan losses. The Company applies the same credit methodology it uses for similar loans that were not modified. Acquired Loans The Company periodically acquires loans through purchases and business combinations. Acquired loans are evaluated upon acquisition to determine if they are PCD loans which are acquired individual loans (or acquired groups of loans with similar risk characteristics) that, as of the date of acquisition, have experienced a more-than-insignificant deterioration in credit quality since origination, as determined by the Company’s assessment. An acquired loan that is not a PCD loan is evaluated to determine if it is a purchased seasoned loan (“PSL”). All loans acquired in a business combination that are not PCD loans, are assessed to determine if they are PSL’s. PCD loans and PSL’s are recorded at their purchase price plus the allowance for loan losses expected at the time of acquisition, or “gross up” of the amortized cost basis, if any. Changes in the current estimate of the allowance for loan losses subsequent to acquisition from the estimated allowance previously recorded are recognized in the income statement as provision for credit losses or reversal of provision for credit losses in subsequent periods as they arise. Evidence that purchased loans, measured at amortized cost, have more-than-insignificant deterioration in credit quality since origination and, therefore meet the PCD definition, may include past-due status, non-accrual status, risk rating and other standard indicators (i.e., modification due to financial difficulty, charge-offs, bankruptcy). Previous to the Company’s adoption of ASU 2025-08, described further below, a purchased loan that did not qualify as a PCD asset was accounted for similar to the Company’s method of accounting for originated assets, whereby an allowance for loan losses was recognized with a corresponding increase to the income statement provision for loan losses. Allowance for Credit Losses The allowance for credit losses, or “ACL,” is established to provide for the Company’s current estimate of expected lifetime credit losses on loans measured at amortized cost and unfunded lending commitments at the balance sheet date and is established through a provision for credit losses charged to net income. Credit losses are charged directly to the ACL. Subsequent recoveries, if any, are credited to the ACL. Commercial and residential loans are charged-off in the period in which they are deemed uncollectible. Delinquent loans in these product types are subject to ongoing review and analysis to determine if a charge-off in the current period is appropriate. For consumer finance loans, policies and procedures exist that require charge-off consideration upon a certain triggering event depending on the product type. Charge-off triggers include: 120 days delinquent for automobile, home equity, and other consumer loans with the exception of cash reserve loans for which the trigger is 150 days delinquent; death of the borrower; or Chapter 7 bankruptcy. In addition to those events, the charge-off determination includes other loan quality indicators, such as collateral position and adequacy or the presence of other repayment sources. The ACL is evaluated on a regular basis by management. Management uses a methodology to systematically estimate the amount of expected lifetime losses in the portfolio. Expected lifetime losses are estimated on a collective basis for loans sharing similar risk characteristics and are determined using a quantitative model combined with an assessment of certain qualitative factors designed to address forecast risk and model risk inherent in the quantitative model output. For the commercial and industrial, commercial real estate, commercial construction and business banking portfolios, the quantitative model uses a loan rating system which is comprised of management’s determination of a financial asset’s probability of default (“PD”), loss given default (“LGD”) and exposure at default (“EAD”), which are derived from both the Company’s and industry historical loss experience and other factors. For residential real estate, consumer home equity and other consumer portfolios, the Company’s quantitative model uses historical loss experience. The quantitative model estimates expected credit losses using loan level data over the estimated life of the exposure, considering the effect of prepayments. Economic forecasts are incorporated into the estimate over a reasonable and supportable forecast period, beyond which is a reversion to the Company’s and/or industry historical loss average. Management has determined that a reasonable and supportable forecast period of eight quarters, and a straight-line reversion period of four quarters, are appropriate forecast periods for purposes of estimating expected credit losses. As described above, quantitative model results are adjusted for risk factors not considered within the model but which are relevant in estimating the expected credit losses within the loan portfolio. The qualitative risk factors impacting the expected risk of loss within the loan portfolio include the following: •Lending policies and procedures, including underwriting standards and collection, charge-off and recovery practices; •Nature and volume of the portfolio; •Volume and severity of past-due, non-accrual and classified loans; •The value of the underlying collateral for loans that are not collateral dependent; •Concentrations of credit risk; •Model and data limitations; and •Other external factors, such as changes in legal, regulatory or competitive environments. Loans that do not share similar risk characteristics with any pools of assets are subject to individual evaluation and are removed from the collectively assessed pools. For loans that are individually evaluated, the Company uses either a discounted cash flow (“DCF”) approach or, for loans deemed to be collateral dependent or when foreclosure is probable, a fair value of collateral approach. Accrued interest receivable amounts are excluded from balances of loans held at amortized cost and are included within other assets on the Consolidated Balance Sheet. Management has elected not to measure an allowance for credit losses on these amounts as the Company employs a timely write-off policy. Consistent with the Company's policy for non-accrual loans, accrued interest receivable is typically written off when loans reach 90 days past due and are placed on non-accrual status. In the ordinary course of business, the Company enters into commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the reserving method for loans receivable previously described. The reserve for unfunded lending commitments is included in other liabilities in the Consolidated Balance Sheets. Additionally, various regulatory agencies, as an integral part of the Company’s examination process, periodically assess the appropriateness of the allowance for credit losses and may require the Company to increase its allowance for loan losses or recognize further loan charge-offs, in accordance with GAAP. Refer to Note 6, “Loans and Allowance for Credit Losses” for additional information regarding the Company’s measurement of credit losses on loans receivable and off-balance sheet commitments to lend.
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| Loans | Loans Loans are reported at their principal amount outstanding, net of deferred loan fees and costs and any unearned discount or unamortized premium for acquired loans. Unearned discount and unamortized premium are accreted and amortized, respectively, to interest and dividend income on a basis that results in level rates of return over the terms of the loans. For originated loans, origination fees and related direct incremental origination costs are offset, and the resulting net amount is deferred and amortized over the life of the related loans using the effective interest method, assuming a certain level of prepayments. When loans are sold or repaid, the unamortized fees and costs are recorded to interest and dividend income. Interest income on loans is accrued based upon the daily principal amount outstanding except for loans on non-accrual status. For acquired loans, interest income is also accrued based upon the daily principal amount outstanding and is adjusted further by the accretion of any discount or amortization of any premium associated with the loan.
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| Non-accrual Loans | Non-accrual Loans Interest accruals are generally discontinued when management has determined that the borrower may be unable to meet contractual obligations and/or when loans are 90 days or more past due. Exceptions may be made if management believes that collateral held by the Company is clearly sufficient and in full satisfaction of both principal and interest. When a loan is placed on non-accrual, all interest previously accrued but not collected is reversed against current period income and amortization of deferred loan fees and costs and unamortized premiums and unearned discounts is discontinued. Interest received on non-accrual loans is either applied against principal or reported as income according to management’s judgment as to the collectability of principal. Non-accrual loans may be returned to an accrual status when principal and interest payments are no longer delinquent, and the risk characteristics of the loan have improved to the extent that there no longer exists a concern as to the collectability of principal and interest. Loans are considered past due based upon the number of days delinquent according to their contractual terms. Non-accrual loans and loans that are more than 90 days past due but still accruing interest are considered NPLs.
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| Loans Held for Sale and Mortgage Servicing Rights | Loans Held for Sale Mortgage loans held for sale to the secondary market are carried at the lower of cost or estimated market value on an individual loan basis. The Company enters into commitments to fund residential mortgage loans with an offsetting forward commitment to sell them in the secondary markets in order to mitigate interest rate risk. Gains or losses on sales of mortgage loans are recognized in the Consolidated Statements of Income at the time of sale. Interest income is recognized on loans held for sale between the time the loan is funded and the loan is sold. Direct loan origination costs and fees are deferred upon origination and are recognized in the Consolidated Statements of Income on the date of sale. Certain mortgage loans that are originated for sale are accounted for under the fair value option, which is elected at origination, whereby any changes in fair value relating to loans intended for sale are recorded in earnings and are offset by changes in fair value relating to interest rate lock commitments and forward sales commitments. Gains and losses on residential loan sales are recorded in mortgage banking income. Upfront costs and fees related to items for which the fair value option is elected are recognized in earnings as incurred and are not deferred. Mortgage Servicing Rights When mortgage loans are sold with servicing retained, servicing rights are initially recorded at fair value with subsequent changes in fair value recorded in income through mortgage banking income. Fair value is based on market prices for comparable mortgage servicing contracts, when available, or alternatively, is based on a valuation model that calculates the present value of estimated future net servicing income. Under the fair value measurement method, the Company measures mortgage servicing rights (“MSRs”) at fair value at each reporting date and reports changes in fair value of servicing assets in earnings in the period in which the changes occur and are included with changes in mortgage servicing rights fair value on the Consolidated Statements of Income. The fair values of servicing rights are subject to significant fluctuations as a result of changes in estimated and actual prepayments speeds and default rates and losses. Servicing fee income, which is reported on the Consolidated Statements of Income within mortgage banking income, is recorded for fees earned for servicing loans. The fees are based on a contractual percentage of outstanding principal; or a fixed amount per loan and are recorded as income when earned. Late fees and ancillary fees related to loan servicing are not material.
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| Other Real Estate Owned | Other Real Estate Owned OREO consists of properties and other assets acquired through foreclosure proceedings or acceptance of a deed in lieu of foreclosure. OREO is recorded in other assets in the Consolidated Balance Sheets, on an individual asset basis at the fair value less estimated costs to sell on the date control is obtained. Any write-downs to the cost of the related asset upon transfer to OREO to reflect the asset at fair value less estimated costs to sell is recorded through the allowance for loan losses. The Company relies primarily on third-party valuation information from certified appraisers and values are generally based upon recent appraisals of the underlying collateral, brokers’ opinions based upon recent sales of comparable properties, estimated equipment auction or liquidation values, income capitalization, or a combination of income capitalization and comparable sales.
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| Federal Home Loan Bank Stock | Federal Home Loan Bank Stock The Company, as a member of the Federal Home Loan Bank (“FHLB”) of Boston (“FHLBB”), is required to maintain an investment in capital stock of the FHLB. Based on redemption provisions, the stock has no quoted market value and is carried at cost.
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| Premises and Equipment | Premises and Equipment Land is carried at cost. Buildings, leasehold improvements and equipment are stated at cost less accumulated depreciation and amortization. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets. Leasehold improvements are amortized over the shorter of the lease terms or the estimated lives of the improvements. Expected lease terms include lease options to the extent that the exercise of such options is reasonably assured. Banking premises and equipment held for sale are carried at the lower of cost or estimated fair value, less estimated costs to sell.
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| Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets Acquisitions of businesses are accounted for using the acquisition method of accounting. Accordingly, the net assets of the companies acquired are recorded at their fair values at the date of acquisition. Goodwill represents the excess of purchase price over the fair value of net assets acquired. Other intangible assets represent acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or other legal rights, or because the asset is capable of being sold or exchanged either on its own, or in combination with a related contract, asset, or liability. The Company evaluates goodwill for impairment at least annually, as of November 30, or more often if warranted, using a quantitative impairment approach. The quantitative impairment test compares the book value to the fair value of each reporting unit. If the book value exceeds the fair value, an impairment is charged to net income. Management has identified one reporting unit for purposes of testing goodwill for impairment which is referred to as “the banking business.” Other intangible assets, all of which are definite-lived, are stated at cost less accumulated amortization. The Company evaluates other intangible assets for impairment whenever events or changes in circumstances indicate that the carrying value of the asset may not be fully recovered. The Company considers factors including, but not limited to, changes in legal factors and business climate that could affect the value of the intangible asset. Any impairment losses are charged to net income. The Company amortizes other intangible assets over their respective estimated useful lives. The estimated useful lives of core deposit identifiable intangible assets fall within a range of to seven years and the estimated useful lives of the customer list and trade name intangible assets from the Cambridge Bancorp (“Cambridge”) merger are and five years, respectively. The Company reassesses the useful lives of other intangible assets at least annually, or more frequently based on specific events or changes in circumstances.
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| Retirement Plans, Employee Tax Deferred Incentive Plan, Defined Contribution Supplemental Executive Retirement Plan, and Deferred Compensation | Retirement Plans The Company provides benefits to its employees and executive officers through various retirement plans, including a defined benefit plan, a defined benefit supplemental executive retirement plan, a defined contribution plan, a benefit equalization plan, and an outside directors’ retainer continuance plan. The Company provides pension benefits for its employees using a noncontributory, qualified defined benefit plan, through membership in the Savings Banks Employees Retirement Association (“SBERA”). The Qualified Defined Benefit Pension Plan (“Defined Benefit Plan”) is a noncontributory, defined benefit plan. The Company’s employees become eligible after attaining age 21 and completing one year of service. Effective November 1, 2020, the Defined Benefit Plan, sponsored by the Company, was amended to convert the plan from a traditional final average earnings plan design to a cash balance plan design. Under the final average earnings plan design, benefits became fully vested after three years of eligible service for individuals employed on or before October 31, 1989. For individuals employed subsequent to October 31, 1989 and who were already in the Defined Benefit Plan as of November 1, 2020, benefits became fully vested after five years of eligible service. Under the cash balance plan design, hypothetical account balances are established for each participant and pension benefits are generally stated as the lump sum amount in that hypothetical account. Contribution credits equal to a percentage of a participant’s annual compensation (if the participant works at least 1,000 hours during the year) and interest credits equal to the greater of the 30-Year Treasury rate for September preceding the current plan year or 3.5% are added to a participant’s account each year. For employees hired prior to November 1, 2020, annual contribution credits generally increase as the participant remains employed with the Company. Employees hired on and after November 1, 2020 receive annual contribution credits equal to 5% of annual compensation, with no future increases. Notwithstanding the preceding sentence, since a cash balance plan is a defined benefit plan, the annual retirement benefit payable at normal retirement (age 65) is an annuity, which is the actuarial equivalent of the participant’s account balance under the cash balance plan design, plus their frozen benefit under the final average earnings plan design. However, under the Defined Benefit Plan, participants may elect, with the consent of their spouses if they are married, to have the benefits distributed as a lump sum rather than an annuity. The lump sum is equal to the sum of the actuarial equivalent of their frozen benefit under the final average earnings plan design, plus their cash balance account. Under the Company’s non-Qualified Benefit Equalization Plan (“BEP”), which is described further below, benefits are generally only payable as a lump sum, which is equal to the sum of the actuarial equivalent of their frozen benefit under the final average earnings plan design, plus their cash balance account. The Company’s annual contribution to the plan is based upon standards established by the Pension Protection Act. The contribution is based on an actuarial method intended to provide not only for benefits attributable to service to date, but also for those expected to be earned in the future. The Company also has an unfunded Defined Benefit Supplemental Executive Retirement Plan (“DB SERP”) that provides certain retired officers with defined pension benefits in excess of qualified plan limits imposed by U.S. federal tax law. The DB SERP has a plan year end of December 31. The Company’s BEP, which is an unfunded plan, provides retirement benefits to certain employees whose retirement benefits under the Defined Benefit Plan are limited per the Internal Revenue Code. The BEP has a plan year end of October 31. Effective November 1, 2020, the BEP, sponsored by the Company, was amended to convert the plan from a traditional final average earnings plan design to a cash balance plan design. The Company also has an unfunded Outside Directors’ Retainer Continuance Plan (“ODRCP”) that provides pension benefits to outside directors who retire from service. The Outside Directors’ Retainer Continuance Plan has a plan year end of December 31. Effective December 31, 2020, the Company closed the ODRCP to new participants and froze benefit accruals for active participants. Defined Benefit Plan assets are invested in various investment funds and held at fair value which generally represents observable market prices. Pension liability is determined based on the actuarial cost method factoring in assumptions such as salary increases, expected retirement date, mortality rate, and employee turnover. The actuarial cost method used to compute the pension liabilities and related expense is the traditional unit credit method. The projected benefit obligation is principally determined based on the present value of the projected benefit distributions at an assumed discount rate (which is the rate at which the projected benefit obligation could be effectively settled as of the measurement date). The discount rate which is utilized is determined using the spot rate approach whereby the individual spot rates on the Financial Times and Stock Exchange (“FTSE”) above-median yield curve are applied to each corresponding year’s projected cash flow used to measure the respective plan’s service cost and interest cost. Periodic pension expense (or income) includes service costs, interest costs based on the assumed discount rate, the expected return on plan assets, if applicable, based on the market value of assets and amortization of actuarial gains and losses. Net periodic benefit cost excluding service cost is included within other noninterest expense in the Consolidated Statements of Income. Service cost for all plans is included in salaries and employee benefits in the Consolidated Statements of Income. The amortization of actuarial gains and losses for the DB SERP and ODRCP is determined using the 10% corridor minimum amortization approach and is taken over the average remaining future service of the plan participants for the ODRCP, and over the average remaining future life expectancy of plan participants for the DB SERP. The amortization of actuarial gains and losses for the Defined Benefit Plan is determined without using the 10% corridor minimum amortization approach and is taken over the average remaining future service of the plan participants. The overfunded or underfunded status of the plans is recorded as an asset or liability on the Consolidated Balance Sheets, with changes in that status recognized through other comprehensive income, net of related taxes. Funded status represents the difference between the projected benefit obligation of the plan and the market value of the plan’s assets. Employee Tax Deferred Incentive Plan The Company has an employee tax deferred incentive plan (“401(k) plan”) under which the Company makes voluntary contributions within certain limitations. All employees who meet specified age and length of service requirements are eligible to participate in the 401(k) plan. The amount contributed by the Company is included in salaries and employee benefits expense. Defined Contribution Supplemental Executive Retirement Plan The Company has a defined contribution supplemental executive retirement plan (“DC SERP”), which allows certain senior officers to earn benefits calculated as a percentage of their compensation. The participant benefits are adjusted based upon a deemed investment performance of measurement funds selected by the participant. These measurement funds are for tracking purposes and are used only to track the performance of a mutual fund, market index, savings instrument, or other designated investment or portfolio of investments. Effective December 31, 2021, the Company closed the DC SERP to new participants and froze benefit accruals for active participants. The total amount due to participants under this plan is included in other liabilities on the Company’s Consolidated Balance Sheets. Deferred Compensation The Company sponsors four plans which allow for elective compensation deferrals by directors, former trustees, and certain senior-level employees. Each plan allows its participants to designate deemed investments for deferred amounts from certain options which include diversified choices, such as exchange traded funds and mutual funds. Portfolios with various risk profiles are available to participants with the approval of the Compensation Committee. The Company purchases and sells investments which track the deemed investment choices, so that it has available funds to meet its payment liabilities. Deferred amounts, adjusted for deemed investment performance, are paid at the time of a participant designated date or event, such as separation from service, death, or disability. The total amounts due to participants under these plans are included in other liabilities on the Company’s Consolidated Balance Sheets.
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| Employee Stock Ownership Plan ("ESOP") | Employee Stock Ownership Plan (“ESOP”) Unallocated ESOP shares are shown as a reduction of equity and are presented in the Consolidated Statements of Shareholders’ Equity as unallocated common stock held by ESOP. Compensation expense for the Company’s ESOP is recorded at an amount equal to the shares committed to be allocated by the ESOP multiplied by the average fair market value of the shares during the year. The Company recognizes compensation expense ratably over the year based upon the Company’s estimate of the number of shares committed to be allocated by the ESOP. When the shares are committed to be released, unallocated common stock held by ESOP is reduced by the cost of the ESOP shares released and the difference between the average fair market value and the cost of the shares committed to be allocated by the ESOP is recorded as an adjustment to additional paid-in capital. The Company’s ESOP is classified as an internally leveraged plan as defined by ASC 718, “Compensation-Stock Compensation.” Accordingly, the loan receivable from the ESOP is not reported as an asset nor is the Company’s guarantee to fund the ESOP reported as a liability on the Company’s Consolidated Balance Sheet.
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| Share-Based Compensation | Share-Based Compensation The Company measures share-based compensation on the grant date fair value on a straight-line basis over the vesting period during which an employee is required to provide services in exchange for the award; the requisite service period. The Company uses various pricing models to estimate the fair value of stock awards granted. The Company measures the fair value of the restricted stock using the closing market price of the Company’s common stock on the date of grant. The Company records compensation expense equal to the grant date fair value of the Company’s restricted stock with a corresponding increase in equity. Reductions in compensation expense associated with forfeited awards are accounted for as incurred. Upon vesting, the tax effect of the difference between the fair value of the award and the recorded expense is recognized as a component of income tax expense. Refer to Note 16, “Share-Based Compensation” for additional information regarding the Company’s share-based compensation plan.
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| Variable Interest Entities ("VIE") and Voting Interest Entities ("VOE"), Rabbi Trust | Variable Interest Entities (“VIE”) and Voting Interest Entities (“VOE”) The Company is involved in the normal course of business with various types of special purpose entities, some of which meet the definition for VIEs and VOEs. VIEs are entities that possess any of the following characteristics: 1) the total equity investment at risk is insufficient to permit the legal entity to finance its activities without additional subordinated financial support from other parties; 2) as a group, the holders of the equity investment at risk lack any of the characteristics of a controlling financial interest; or 3) the equity investors’ voting rights are not proportional to the economics, and substantially all of the activities of the entity either involve or are conducted on behalf of an investor that has disproportionately few voting rights. The Company consolidates entities deemed to be VIEs when it, or a wholly-owned subsidiary, is determined to be the primary beneficiary. The primary beneficiary analysis is a qualitative analysis based on power and economics. An enterprise has a controlling financial interest in a VIE if it has both 1) the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance and 2) the obligation to absorb losses of the VIE that potentially could be significant to the VIE or the right to receive benefits from the VIE that potentially could be significant to the VIE. VOEs are entities in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make decisions about the entity’s activities. The Company generally consolidates VOEs when it, or a wholly-owned subsidiary, holds the majority of the voting interest in the VOE. Rabbi Trusts The Company established rabbi trusts to meet its obligations under certain executive non-qualified retirement benefits and deferred compensation plans and to mitigate the expense volatility of the aforementioned retirement plans. The rabbi trusts are considered VIEs as the equity investment at risk is insufficient to permit the trust to finance its activities without additional subordinated financial support from the Company. The Company is considered the primary beneficiary of the rabbi trusts as it has the power to direct the activities of the rabbi trusts that significantly affect the rabbi trust’s economic performance and it has the obligation to absorb losses of the rabbi trusts that could potentially be significant to the rabbi trusts by virtue of its contingent call options on the rabbi trust’s assets in the event of the Company’s bankruptcy. As the primary beneficiary of these VIEs, the Company consolidates the rabbi trust investments. In general, the rabbi trust investments and any earnings received thereon are accumulated, reinvested and used exclusively for trust purposes. These rabbi trust investments consist primarily of cash and cash equivalents, U.S. government agency obligations, equity securities, mutual funds and other exchange-traded funds, and are recorded at fair value in the Company’s Consolidated Balance Sheets. Changes in fair value are recorded in noninterest income in the Consolidated Statements of Income. These rabbi trust assets are included within other assets in the Company’s Consolidated Balance Sheets.
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| Bank Owned Life Insurance | Bank Owned Life Insurance The Company holds bank-owned life insurance on the lives of certain participating executives, primarily as a result of mergers and acquisitions. The amount reported as an asset on the Consolidated Balance Sheets is the sum of the cash surrender values reported to the Company by the various insurance carriers. Certain policies are split-dollar life insurance policies whereby the Company recognizes a liability for the postretirement benefit related to the arrangement. This postretirement benefit is included in other liabilities on the Consolidated Balance Sheets.
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| Income Taxes | Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are established for the temporary differences between the accounting basis and the tax basis of the Company’s assets and liabilities at enacted tax rates expected to be in effect when the amounts related to such temporary differences are realized or settled. A valuation allowance is established if it is considered more-likely-than-not that all or a portion of the deferred tax assets will not be realized. Interest and penalties paid on the underpayment of income taxes are classified as income tax expense. The Company periodically evaluates the potential uncertainty of its tax positions as to whether it is more-likely than-not its position would be upheld upon examination by the appropriate taxing authority. A tax position that meets the more-likely-than-not recognition threshold is measured to determine the amount of benefit to recognize in the Consolidated Financial Statements. The tax position is measured at the largest amount of benefit that management believes is greater than 50% likely of being realized upon settlement.
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| Low Income Housing Tax Credits and Other Tax Credit Investments | Low Income Housing Tax Credits and Other Tax Credit Investments As part of its community reinvestment initiatives, the Company primarily invests in qualified affordable housing projects in addition to other tax credit investment projects. The Company receives low-income housing tax credits, investment tax credits, rehabilitation tax credits, solar tax credits and other tax credits as a result of its investments in these limited partnership investments. The Company accounts for its investments in qualified affordable housing projects using the proportional amortization method and amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits allocated to the Company. The amortization of the excess of the carrying amount of the investment over its estimated residual value is included as a component of income tax expense. At investment inception, the Company records a liability for the committed amount of the investment; this liability is reduced as contributions are made. The Company evaluates investments in tax credit investment companies for consolidation based on the variable or voting interest entity guidance, as appropriate. Other tax credit investment projects are accounted for using either the cost method or equity method.
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| Trust Operations | Trust Operations The Bank is a full-service trust company that provides a wide range of trust services to customers that includes managing customer investments, safekeeping customer assets, supplying disbursement services, and providing other fiduciary services. Trust assets held in a fiduciary or agency capacity for customers are not included in the accompanying Consolidated Balance Sheets as they are not assets of the Company. The fees charged are variable based on various factors such as the Company’s responsibility, the type of account, and account size. Customers are also charged a base fee which is prorated over a twelve-month period. Fees for additional or special services are generally fixed in nature and are charged as services are rendered. Revenue from administrative and management activities associated with these assets is recognized as performance obligations of underlying agreements are satisfied.
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| Derivative Financial Instruments | Derivative Financial Instruments Derivative instruments are carried at fair value in the Company’s Consolidated Financial Statements. The accounting for changes in the fair value of a derivative instrument is determined by whether it has been designated and qualifies as part of a hedging relationship, and further, by the type of hedging relationship. At the inception of a hedge, the Company documents certain items, including, but not limited to, the following: the relationship between hedging instruments and hedged items, the Company’s risk management objectives, hedging strategies, and the evaluation of hedge transaction effectiveness. Documentation includes linking all derivatives that are designated as hedges to specific assets or liabilities on the balance sheet or to specific forecasted transactions. The Company’s derivative instruments that are designated and qualify for hedge accounting are classified as cash flow hedges (i.e., hedging the exposure to variability in expected future cash flows associated with a recognized asset or liability, or a forecasted transaction). As such, changes in the fair value of the designated hedging instrument that is included in the assessment of hedge effectiveness are recorded in other comprehensive income and reclassified into net income in the same period or periods during which the hedged forecasted transaction affects net income. Such reclassifications are presented in the same income statement line item as the net income effect of the hedged item. If the hedging instrument is not highly effective at achieving offsetting cash flows attributable to the revised contractually specified interest rate(s), hedge accounting will be discontinued. At that time, accumulated other comprehensive income would be frozen and amortized, as long as the forecasted transactions are still probable of occurring. If a cash flow hedge is terminated, hedge accounting treatment would be retained, and accumulated other comprehensive income would be frozen and amortized, as long as the forecasted transactions are still probable of occurring. The Company’s derivative instruments not designated as hedging instruments are recorded at fair value and changes in fair value are recognized in other noninterest income. Derivative instruments not designated as hedging instruments include interest rate swaps, foreign exchange contracts offered to commercial customers to assist them in meeting their financing and investing objectives for their risk management purposes, and risk participation agreements entered into as financial guarantees of performance on customer-related interest rate swap derivatives. The interest rate and foreign exchange risks associated with customer interest rate swaps and foreign exchange contracts are mitigated by entering into similar derivatives having offsetting terms with correspondent bank counterparties. All derivative financial instruments eligible for clearing are cleared through the Chicago Mercantile Exchange (“CME”). In accordance with its amended rulebook, CME legally characterizes variation margin payments made to and received from the CME as settlement of derivatives rather than as collateral against derivatives.
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| Fair Value Measurements | Fair Value Measurements ASC 820 “Fair Value Measurements and Disclosures” (“ASC 820”) defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants on the measurement date. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market. An orderly transaction is a transaction that assumes exposure to the market for a period prior to the measurement date. Market participants are buyers and sellers in the principal market that are independent, knowledgeable, able and willing to transact. ASC 820 also establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements), and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below: Level 1 – Inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 – Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly. Level 3 – Prices or valuations that require unobservable inputs that reflect the Company’s own assumptions that are significant to the fair value measurement. To the extent that valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.
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| Leases | Leases The Company leases certain office space and equipment under various non-cancelable operating leases, some of which have renewal options to extend lease terms. At lease inception, the Company evaluates the lease terms to determine if the lease should be classified as an operating lease or a finance lease and recognizes a right of use (“ROU”) asset and corresponding lease liability. The Company makes the decision on whether to renew an option to extend a lease by considering various factors. The Company will recognize an adjustment to its ROU asset and lease liability when lease agreements are amended and executed. The discount rate used in determining the present value of lease payments is based on the Company’s incremental borrowing rate for borrowings with terms similar to each lease at commencement date. The Company has lease agreements with lease and non-lease components, which are generally accounted for as a single lease component. The Company has elected the short-term lease recognition exemption for all leases that qualify.
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| Common Share Repurchases | Common Share Repurchases Shares repurchased by the Company under the Company’s share repurchase programs have been classified as authorized but unissued shares. The cost of shares repurchased by the Company has been accounted for as a reduction to common stock and additional paid in capital balances. Massachusetts state law calls for repurchased shares to be classified as authorized but unissued shares. U.S. GAAP states that the accounting for share repurchases shall conform to state law where applicable.
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| Earnings Per Share | Earnings Per Share Basic earnings per share represents income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Unallocated ESOP shares are not deemed outstanding for earnings per share calculations. ESOP shares committed to be released are considered to be outstanding for purposes of the earnings per share computation. ESOP shares that have not been legally released, but that relate to employee services rendered during an accounting period (interim or annual) ending before the related debt service payment is made, are considered committed to be released. Diluted earnings per share reflects additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Company relate to outstanding stock awards and are determined using the treasury stock method.
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| Segment Reporting | Segment Reporting An operating segment is defined as a component of a business for which separate financial information is available that is evaluated regularly by the chief operating decision-maker (“CODM”) in deciding how to allocate resources and evaluate performance. The Company has determined that its CODM is its Executive Chair. The Company has one reportable segment: its banking business, which consists of a full range of banking lending, savings, and small business offerings, and its wealth management and trust operations.
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| Recent Accounting Pronouncements | Recent Accounting Pronouncements Relevant standards that were recently issued but not yet adopted as of December 31, 2025: In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements–Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative (“ASU 2023-06”). The amendments in this update modify the disclosure or presentation requirements for a variety of topics in the codification. Certain amendments represent clarifications to or technical corrections of the current requirements. The following is a summary of the topics included in the update and which pertain to the Company: 1.Statement of cash flows (Topic 230): Requires an accounting policy disclosure in annual periods of where cash flows associated with derivative instruments and their related gains and loses are presented in the statement of cash flows; 2.Accounting changes and error corrections (Topic 250): Requires that when there has been a change in the reporting entity, the entity disclose any material prior-period adjustment and the effect of the adjustment on retained earnings in interim financial statements; 3.Earnings per share (Topic 260): Requires disclosure of the methods used in the diluted earnings-per-share computation for each dilutive security and clarifies that certain disclosures should be made during interim periods, and amends illustrative guidance to illustrate disclosure of the methods used in the diluted earnings per share computation; 4.Commitments (Topic 440): Requires disclosure of assets mortgaged, pledged, or otherwise subject to lien and the obligations collateralized; and 5.Debt (Topic 470): Requires disclosure of amounts and terms of unused lines of credit and unfunded commitments and the weighted-average interest rate on outstanding short-term borrowings. For public business entities, the amendments in ASU 2023-06 are effective on the date which the SEC’s removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective. If by June 30, 2027, the SEC has not removed the applicable requirement from Regulation and S-X or Regulation S-K, the pending content of the related amendment will be removed from the codification and will not become effective for any entity. Early adoption is not permitted and the amendments are required to be applied on a prospective basis. The Company expects the adoption of this standard will not have a material impact on its Consolidated Financial Statements. In November 2024, the FASB issued ASU 2024-03, Income Statement–Reporting Comprehensive Income–Expense Disaggregation Disclosures (Subtopic 220-40). The amendments in this update require disclosure, in the notes to the financial statements, of specified information about certain costs and expenses. The amendments require that at each interim and annual reporting period an entity: 1.Disclose the amounts of (a) purchases of inventory, (b) employee compensation, (c) depreciation, (d) intangible asset amortization, and (e) depreciation, depletion, and amortization recognized as part of oil and gas-producing activities (or other amounts of depletion expense) included in each relevant expense caption. A relevant expense caption is an expense caption presented on the face of the income statement within continuing operations that contains any of the expense categories listed in (a)–(e). 2.Include certain amounts that are already required to be disclosed under current GAAP in the same disclosure as the other disaggregation requirements. 3.Disclose a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated quantitatively. 4.Disclose the total amount of selling expenses and, in annual reporting periods, an entity’s definition of selling expenses. For public business entities, the amendments in ASU 2024-03 are effective for annual periods beginning after December 15, 2026 and interim periods beginning after December 15, 2027. Early adoption is permitted. The amendments in this update are to be applied either (1) prospectively to financial statements issued for reporting periods after the effective date of this update or (2) retrospectively to any or all prior periods presented in the financial statements. The Company expects the adoption of this standard will not have a material impact on its Consolidated Financial Statements. In April 2025, the FASB issued ASU 2025-03, Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer of a Variable Interest Entity. The amendments in this update are intended to improve the requirements for identifying the accounting acquirer in Topic 805, Business Combinations. The amendments in this update differ from current generally accepted accounting principles because, for certain transactions, they replace the requirement that the primary beneficiary always is the acquirer with an assessment that requires an entity to consider the factors to determine which entity is the accounting acquirer. The amendments in this update enhance the comparability of financial statements across entities engaging in acquisition transactions effected primarily by exchanging equity interests when the legal acquiree meets the definition of a business. Specifically, under the amendments, acquisition transactions in which the legal acquiree is a variable interest entity will, in more instances, result in the same accounting outcomes as economically similar transactions in which the legal acquiree is a voting interest entity. The amendments in this update do not change the accounting for a transaction determined to be a reverse acquisition or a transaction in which the legal acquirer is not a business and is determined to be the accounting acquiree. For public business entities, the amendments in ASU 2025-03 are effective for annual periods beginning after December 15, 2026 and interim periods within those annual periods. Adoption should be done on a prospective basis. Early adoption is permitted as of the beginning of an interim or annual reporting period. The Company does not expect the adoption of this standard will have a material impact on its Consolidated Financial Statements. In November 2025, the FASB issued ASU 2025-09, Derivatives and Hedging (Topic 815): Hedge Accounting Improvements. The amendments in this update help clarify and refine hedge accounting requirements, including clarifications to documentation and designation in regards to hedge relationships. The update introduces improvements to hedge accounting to better align financial reporting with the economic results of an entity's risk management activities. Early adoption is permitted. For public business entites, the amendments in this update are effective for annual reporting periods beginning after December 15, 2026, and interim periods within those annual reporting periods. The Company does not expect the adoption of this standard to have a material impact on its Consolidated Financial Statements. In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements. The amendments in this update clarify interim disclosure requirements and the applicability of Topic 270. The amendments in this update result in a comprehensive list of interim disclosures that are required by GAAP. In developing the list of disclosures required by other Topics, the Board focused on identifying the interim disclosures that are currently required under GAAP. The objective of the amendments is to provide clarity about the current requirements, rather than evaluate whether to expand or reduce interim disclosure requirements. The amendments in this update also include a disclosure principle that requires entities to disclose events since the end of the last annual reporting period that have a material impact on the entity. The intent of the disclosure principle, which is modeled after a previous SEC disclosure requirement, is to help entities determine whether disclosures not specified in Topic 270 should be provided in interim reporting periods. The amendments in this update also clarify the applicability of Topic 270, the types of interim reporting, and the form and content of interim financial statements in accordance with GAAP. For public business entities, the amendments in ASU 2025-11 are effective for interim reporting periods within annual reporting periods beginning after December 15, 2027. Adoption can be applied either prospectively or retrospectively to any or all prior periods presented in the financial statements. Early adoption is permitted. The Company does not expect the adoption of this standard will have a material impact on its Consolidated Financial Statements. Relevant standards that were adopted during the year ended December 31, 2025: In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The amendments in this update are intended to improve income tax disclosure requirements, primarily through enhanced disclosures related to the existing requirements to disclose a rate reconciliation, income taxes paid and certain other required disclosures. Specifically, the amendments in this update: 1.Require that a public entity disclose, on an annual basis: (1) specific categories in the rate reconciliation and (2) additional information for reconciling items that meet a quantitative threshold. The update requires disclosure of such reconciling items according to requirements indicated in the update. 2.Require that all entities disclose certain disaggregated information regarding income taxes paid. 3.Require that all entities disclose certain disaggregated information regarding income tax expense. 4.Eliminate the requirement to: (1) disclose the nature and estimate of the range of reasonably possible changes in the unrecognized tax benefits balance in the next 12 months or (2) make a statement that an estimate of the range cannot be made. 5.Remove the requirement to disclose the cumulative amount of each type of temporary difference when a deferred tax liability is not recognized because of exceptions to comprehensive recognition of deferred taxes related to subsidiaries and corporate joint ventures. For public business entities, the amendments in ASU 2023-09 are effective for annual periods beginning after December 15, 2024. Adoption should be done on a prospective basis and retrospective application is permitted. The adoption of this standard did not have a material impact on the Company’s Consolidated Financial Statements. In August 2025, the FASB issued ASU 2025-05, Financial Instrument- Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets. The amendments in this update provide for the following when estimating expected credit losses for current accounts receivable and current contract assets arising from transactions accounted for under Topic 606, Revenue from Contracts with Customers: 1.In developing reasonable and supportable forecasts as part of estimating expected credit losses, all entities may elect a practical expedient that assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. 2.An entity other than a public business entity that elects the practical expedient is permitted to make an accounting policy election to consider collection activity after the balance sheet date when estimating expected credit losses. The adoption of this standard did not have a material impact on the Company’s Consolidated Financial Statements. In November 2025, the FASB issued ASU 2025-08, Financial Instrument- Credit Losses (Topic 326): Purchased Loans. The amendments in this update expand the population of acquired financial assets subject to the gross-up approach in Topic 326, Financial Instrument- Credit Losses. In accordance with the amendments in this update, loans (excluding credit cards) acquired without credit deterioration and deemed “seasoned” (defined below) are purchased seasoned loans and accounted for using the gross-up approach at acquisition. Specifically, after an entity determines that a loan is a non-PCD asset based on its assessment of credit deterioration experienced since origination, the entity should apply the guidance described in the amendments to determine whether the loan is seasoned and, therefore, should be accounted for using the gross-up approach. All non-PCD loans (excluding credit cards) that are acquired in a business combination are deemed seasoned. Other non-PCD loans (excluding credit cards) are seasoned if they were purchased at least 90 days after origination and the acquirer was not involved in the origination of the loans. The Company elected to early-adopt this ASU and applied the amendments to loans acquired in our merger with HarborOne. Refer to Note 3, “Mergers and Acquisitions” within the Notes to the Consolidated Financial Statements included in Part II, Item 8 in this Annual Report on Form 10-K for further information including the initial allowance for loan losses recognized on purchased seasoned loans acquired in the merger.
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Mergers and Acquisitions (Tables) |
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| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination, Recognized Asset Acquired and Liability Assumed | The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of merger from HarborOne:
(1)Includes certificates of deposit, at fair value, of $1.4 billion. The following table summarizes the estimated fair values of the assets acquired and the liabilities assumed at the date of merger from Cambridge:
(1)Includes certificates of deposit, at fair value, of $418.7 million. (2)The FHLB advances assumed were overnight borrowings which matured immediately following the completion of the merger and therefore were not adjusted to fair value.
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| Schedule of Difference Between the Purchase Price and Par Value of PCD Loans | The following is a reconciliation of the difference between the purchase price and par value of PCD loans acquired in the merger:
The following is a reconciliation of the difference between the purchase price and par value of PCD loans acquired in the merger:
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| Schedule of Merger and Acquisition Expenses | The following table presents HarborOne-related merger and acquisition costs by expense category, which are included in non-operating expenses on the Consolidated Statements of Income, for the year ended December 31, 2025:
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| Schedule of Business Acquisition, Pro Forma Information | The following table presents certain unaudited pro forma information for the years ended December 31, 2025 and 2024. This unaudited estimated pro forma financial information was calculated as if the merger had occurred as of January 1, 2024. This unaudited pro forma information combines the historical results of HarborOne with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the merger occurred as of the beginning of the year prior to the merger. The unaudited pro forma information does not consider any changes to the provision for loan losses resulting from recording loan assets at fair value, cost savings, or business synergies. As a result, actual amounts would have differed from the unaudited pro forma information presented.
The following table presents certain unaudited pro forma information for the years ended December 31, 2024 and 2023. This unaudited estimated pro forma financial information was calculated as if the merger had occurred as of January 1, 2023. This unaudited pro forma information combines the historical results of Cambridge with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the merger occurred as of the beginning of the year prior to the merger. The unaudited pro forma information does not consider any changes to the provision for loan losses resulting from recording loan assets at fair value, cost savings, or business synergies. As a result, actual amounts would have differed from the unaudited pro forma information presented.
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Securities (Tables) |
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| Debt Securities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Debt Securities, Available-for-Sale | The amortized cost, gross unrealized gains and losses, allowance for credit losses (“ACL”) and fair value of AFS securities as of the dates indicated were as follows:
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| Schedule of Realized Gain (Loss) | The following table summarizes gross realized gains and losses from sales of AFS securities for the periods indicated:
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| Schedule of Government-Sponsored Residential Mortgage-Backed Securities with Gross Unrealized Losses | Information pertaining to AFS securities with gross unrealized losses as of December 31, 2025 and 2024, for which the Company did not recognize a provision for credit losses under CECL, aggregated by investment category and length of time that individual securities had been in a continuous loss position, is as follows:
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| Schedule of Debt Securities, Held-to-Maturity | The amortized cost, gross unrealized gains and losses, allowance for credit losses and fair value of HTM securities as of the dates indicated were as follows:
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| Schedule of Fair Value of Available for Sale Securities by Contractual Maturities | The scheduled contractual maturities of AFS and HTM securities as of the dates indicated were as follows:
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Mortgage Banking (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Transfers and Servicing [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Weighted Average Assumptions Used in the Calculation of Fair Value of MSRs | At December 31, 2025, the following weighted average assumptions were used in the calculation of fair value of MSRs:
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| Schedule of Changes to MSRs | The following summarizes changes to MSRs for the periods indicated:
(1)Includes MSRs acquired in our merger with HarborOne which amounted to $39.7 million as of November 1, 2025.
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| Schedule of Components of Mortgage Banking Income | The components of mortgage banking income were as follows for the periods indicated:
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Loans and Allowance for Credit Losses (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Receivables [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Accounts, Notes, Loans and Financing Receivable | The following table provides a summary of the Company’s loan portfolio as of the dates indicated:
(1)The balance of accrued interest receivable excluded from amortized cost and the calculation of the allowance for loan losses amounted to $81.9 million and $66.7 million as of December 31, 2025 and 2024, respectively, and is included within other assets on the Consolidated Balance Sheets.
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| Schedule of Financing Receivable, Allowance for Credit Loss | The following tables summarize the change in the allowance for loan losses by loan category for the periods indicated:
(1)Represents the adjustment needed to reflect the cumulative day one impact pursuant to the Company’s adoption of ASU 2022-02 (i.e., cumulative effect adjustment related to the adoption of ASU 2022-02 as of January 1, 2023). The adjustment represents a $1.1 million decrease to the allowance attributable to the change in accounting methodology for estimating the allowance for loan losses resulting from the Company’s adoption of the standard.
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| Schedule of Details the Internal Risk-rating Categories for the Company's Commercial and Industrial, Commercial Real Estate, Commercial Construction and Business Banking Portfolios | The following table details the amortized cost balances of the Company’s loan portfolios, presented by credit quality indicator and origination year as of December 31, 2025, and gross charge-offs for the year ended December 31, 2025:
(1)The amounts presented represent the amortized cost as of December 31, 2025 of revolving loans that were converted to term loans during the year ended December 31, 2025. The following table details the amortized cost balances of the Company’s loan portfolios, presented by credit quality indicator and origination year as of December 31, 2024:
(1)The amounts presented represent the amortized cost as of December 31, 2024 of revolving loans that were converted to term loans during the year ended December 31, 2024.
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| Schedule of Age Analysis of Past Due Loans | The following tables show the age analysis of past due loans as of the dates indicated:
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| Schedule of Pertaining to the Breakdown of the Company's Nonaccrual Loans | The following table presents information regarding non-accrual loans as of the dates indicated:
(1)The loans on non-accrual status and without an ACL as of both December 31, 2025 and 2024, were primarily comprised of collateral dependent loans for which the fair value of the underlying loan collateral exceeded the loan carrying value.
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| Schedule of the Modifications Which Occurred During the Periods and the Change in the Recorded Investment Subsequent to the Modifications Occurring | The following table shows the amortized cost balance as of dates indicated of loans modified during the years then ended to borrowers experiencing financial difficulty by the type of concession granted:
The following tables describe the financial effect of the modifications made during the periods indicated to borrowers experiencing financial difficulty. Loans that were modified in more than one manner are included in each modification type corresponding to the types of modifications performed:
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| Schedule of the Age Analysis of Past Due Loans to Borrowers Experiencing Financial Difficulty | The following tables show the age analysis of past due loans to borrowers experiencing financial difficulty as of the dates indicated that were modified during the 12-month periods then ended:
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| Schedule of Participating Mortgage Loans | The following table summarizes the Company’s loan participations:
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Premises and Equipment (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Premises and Equipment | The following table summarizes the Company’s premises and equipment as of the dates indicated:
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Leases (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Lease Cost | As of the dates indicated, the Company had the following related to operating leases:
The following table is a summary of the Company’s components of net lease cost for the periods indicated:
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| Schedule of Operating Lease Balance Sheet Information | Supplemental balance sheet information related to operating leases as of the dates indicated is as follows:
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| Schedule of Future Minimum Lease Payments | The following table sets forth the undiscounted cash flows of base rent related to operating leases outstanding as of December 31, 2025 with payments scheduled over the next five years and thereafter, including a reconciliation to the operating lease liability recognized in other liabilities in the Company’s Consolidated Balance Sheets:
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Goodwill and Other Intangible Assets (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Goodwill and Other Intangible Assets | The table below sets forth the carrying amount of goodwill and other intangible assets, net of accumulated amortization as of the dates indicated below. With regard to the year ended December 31, 2023, the information presented within this Note excludes discontinued operations. Refer to Note 24, “Discontinued Operations” for further discussion regarding discontinued operations.
(1)The increase in goodwill and other intangible assets from December 31, 2024 to December 31, 2025 was due to goodwill and a core deposit intangible recorded during the fourth quarter of 2025 in connection with the HarborOne merger. Refer to Note 3, Mergers and Acquisitions for further information regarding the Company’s merger with HarborOne.
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| Schedule of Goodwill Carrying Value | The changes in the carrying value of goodwill for the periods indicated were as follows:
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| Schedule of Carrying Amount and Accumulated Amortization of Other Intangible Assets | The following table sets forth the carrying amount of the Company’s other intangible assets, net of accumulated amortization, as of the dates indicated below:
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| Schedule of Amortization Expense | The estimated amortization expense for the remaining useful life of the Company’s other intangible assets is as follows:
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Deposits (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Banking and Thrift, Interest [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of the Company’s Deposits | The following table provides a summary of the Company’s deposits as of the dates indicated:
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| Schedule of Certificate of Deposits Maturities | The following table summarizes certificates of deposit by maturity at December 31, 2025:
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Borrowed Funds (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Federal Home Loan Banks [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Federal Home Loan Bank, Advances | Borrowed funds were comprised of the following:
Interest expense on borrowed funds was as follows:
A summary of FHLBB advances by maturities were as follows:
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Earnings Per Share ("EPS") (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Earnings Per Share, Basic and Diluted | The following are the components and results of the Company’s earnings per common share calculations for the periods presented:
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Low Income Housing Tax Credits and Other Tax Credit Investments (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity Method Investments and Joint Ventures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of the Company's Investments in Low Income Housing Projects Accounted for Using the Proportional Amortization Method | The following table presents the Company’s investments in LIHTC projects using the proportional amortization method as of the dates indicated:
The following table presents additional information related to the Company’s investments in LIHTC projects for the periods indicated:
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Income Taxes (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Company's Tax Provision and Applicable Tax Rates | The provision for income taxes is comprised of the following components:
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| Schedule of Effective Income Tax Rate Reconciliation | A reconciliation of the U.S. federal statutory rate to the Company’s effective income tax rate is detailed below:
(1)The states and local jurisdictions that contribute to the majority (greater than 50%) of the tax effect in this category includes Massachusetts.
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| Schedule of Deferred Tax Assets and Liabilities | Significant components of the Company’s deferred tax assets and deferred tax liabilities are presented below:
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| Schedule of Unrecognized Tax Benefits Roll Forward | The following table presents a reconciliation of the beginning and ending amount of unrecognized tax benefits for the periods indicated:
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| Schedule of Income Taxes (Refunded) Paid | The amounts of cash income taxes (refunded) paid by the Company during the year ended December 31, 2025 were as follows:
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Minimum Regulatory Capital Requirements (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Banking and Thrift, Interest [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations | The Company’s actual capital amounts and ratios are presented in the following table as of the dates indicated:
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Employee Benefits (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Defined Benefit Plan, Plan with Projected Benefit Obligation in Excess of Plan Assets | The funded status and amounts recognized in the Company’s Consolidated Financial Statements for the Defined Benefit Plan, the BEP, the DB SERP, the ODRCP, and the PHCP are set forth in the following table:
(1)Includes service costs related to employees of the insurance agency business as it relates to the year ended December 31, 2023. Refer to the later discussion within the “Components of Net Periodic Benefit Cost” section within this Note for further discussion.
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| Schedule of Defined Benefit Plan, Assumptions | The assumptions used in determining the benefit obligations at December 31, 2025 and 2024 were as follows:
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| Schedule of Net Benefit Costs | The assumptions used in determining the net periodic benefit cost for the years ended December 31, 2025, 2024, and 2023 were as follows:
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| Schedule of Reconciliation of Interest in SBERA Common Collective | The table below presents a reconciliation of the Company’s interest in the SBERA common collective trust during the years indicated:
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| Schedule of Components of Net Pension Expense | The components of net pension expense for the plans for the periods indicated are as follows:
(1)Includes service costs related to employees of the Company’s insurance agency business for the year ended December 31, 2023. Such service costs were included in net income from discontinued operations as such costs are no longer incurred by the Company following the sale of the insurance agency business in October 2023. All other costs included in the determination of the benefit obligation for the Defined Benefit Plan and the BEP were included in net income from continuing operations as the Bank assumed the related liability upon dissolution of its Eastern Insurance Group subsidiary. Service costs included in net income from discontinued operations and included in the above table were $5.1 million for the year ended December 31, 2023. (2)The pension curtailment gain recognized during the year ended December 31, 2023 was included in discontinued operations. Refer to the below discussion under “Pension Curtailment and Settlement” for further discussion.
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| Schedule of Expected Benefit Payments | The following table summarizes estimated benefits to be paid from the Defined Benefit Plan and BEP for the plan years beginning on November 1, and the DB SERP, the ODRCP, and the PHCP for the plan years beginning January 1:
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| Schedule of Assets Held in Rabbi Trust | Assets held in rabbi trust accounts by plan type, at fair value, were as follows:
The following tables present the book value, net unrealized gain or loss, and market value of assets held in rabbi trust accounts by asset type:
(1)Equities include mutual funds and other exchange-traded funds.
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Share-Based Compensation (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Employee Stock Ownership Plan (ESOP) | The following table presents the amount of compensation expense associated with the ESOP and the amount of the loan payments made by the ESOP, including the portions related to principal and interest, for the periods indicated:
The following table presents share information held by the ESOP:
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| Summary of Share-Based Compensation Awards | The following table summarizes the share-based compensation awards for the years ended December 31, 2025, 2024 and 2023:
(1)Vesting of PSU awards is contingent upon the Compensation and Human Capital Management Committee of the Board of Director’s certification, after the conclusion of the period indicated from the date of the grant, that the Company has attained a threshold level of certain performance criteria over such period.
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| Schedule of Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity | The following table summarizes the Company’s restricted stock award activity for the periods indicated:
The following table summarizes the Company’s restricted stock unit activity for the periods indicated:
The following table summarizes the Company’s performance stock unit activity for the periods indicated:
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| Schedule of Share-based Compensation Expense Under the 2021 Plan and the Related Tax Benefit | The following table shows share-based compensation expense under the 2021 Plan and the related tax benefit for the periods indicated:
(1)Estimated based upon the Company’s statutory rate for the respective period.
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Commitments and Contingencies (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Financial Instruments as of the Dates Indicated | The following table summarizes the above financial instruments as of the dates indicated:
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Derivative Financial Instruments (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Derivative Instruments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Interest Rate Derivatives | The following tables reflect the Company’s derivative positions for interest rate swaps which qualify as cash flow hedges for accounting purposes as of the dates indicated:
(1)The fair value included a net accrued interest payable balance of $0.6 million as of December 31, 2025. In addition, the fair value includes netting adjustments which represent the amounts recorded to convert derivative assets and liabilities cleared through the CME from a gross basis to a net basis in accordance with applicable accounting guidance.
(1)The fair value included a net accrued interest payable balance of $1.6 million as of December 31, 2024. In addition, the fair value includes netting adjustments which represent the amounts recorded to convert derivative assets and liabilities cleared through the CME from a gross basis to a net basis in accordance with applicable accounting guidance.
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| Schedule of Pre-tax Impact of Terminated Cash Flow Hedged on AOCI | The following table presents the pre-tax impact of terminated cash flow hedges on AOCI for the periods indicated:
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| Schedule of Derivatives Not Designated as Hedging Instruments | The following tables present the Company’s customer-related derivative positions as of the dates indicated below for those derivatives not designated as hedging:
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| Schedule of Derivative Financial Instruments | The table below presents the fair value of the Company’s derivative financial instruments, as well as their classification on the Consolidated Balance Sheets for the periods indicated:
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| Schedule of Derivative Financial Instruments On The Consolidated Income Statements | The table below presents the net effect of the Company’s derivative financial instruments on the Consolidated Statements of Income as well as the effect of the Company’s derivative financial instruments included in other comprehensive income (“OCI”) as follows:
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Balance Sheet Offsetting (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Offsetting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Offsetting Assets | The following tables present the Company’s asset and liability positions that were eligible for offset and the potential effect of netting arrangements on its financial position, as of the dates indicated:
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| Schedule of Offsetting Liabilities | The following tables present the Company’s asset and liability positions that were eligible for offset and the potential effect of netting arrangements on its financial position, as of the dates indicated:
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Fair Value of Assets and Liabilities (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of The Balances Of Assets And Liabilities Measured At Fair Value On A Recurring Basis | The following tables present the balances of assets and liabilities measured at fair value on a recurring basis as of December 31, 2025 and 2024:
(1)Refer to Note 5, “Mortgage Banking” for further discussion regarding valuation inputs.
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| Schedule of The Fair Value Of Assets And Liabilities Measured At Fair Value On A Nonrecurring Basis | The following tables summarize the fair value of assets and liabilities measured at fair value on a nonrecurring basis, as of December 31, 2025 and 2024.
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| Schedule of Fair Value of Financial Instruments | The estimated fair values and related carrying amounts for assets and liabilities for which fair value is only disclosed are shown below as of the dates indicated:
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Revenue from Contracts with Customers (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from Contract with Customer [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Revenue from External Customers by Products and Services | A portion of the Company’s noninterest (loss) income is derived from contracts with customers within the scope of ASC 606. The Company has disaggregated such revenues by type of service, as presented in the table below. These categories reflect how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors.
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Other Comprehensive Income (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of Other Comprehensive Income [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Comprehensive Income (Loss) | The following tables present a reconciliation of the changes in the components of other comprehensive income (loss) for the dates indicated including the amount of income tax (expense) benefit allocated to each component of other comprehensive income (loss):
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| Schedule of Accumulated Other Comprehensive Income (Loss) | The following table illustrates the changes in the balances of each component of accumulated other comprehensive income (loss), net of tax:
The following table illustrates the significant amounts reclassified out of each component of accumulated other comprehensive (loss)/income, net of tax:
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Discontinued Operations (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Discontinued Operations and Disposal Groups [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of the Operating Results of the Discontinued Insurance Agency Business | The following presents operating results of the discontinued insurance agency business for the periods indicated:
(1)Represents net income from discontinued operations that is presented in the Consolidated Statements of Income. The following is a summary of such items and the corresponding income tax effect for the periods indicated:
(1)Includes income on Company-owned life insurance policies which were not disposed of and were transferred into the Bank upon dissolution of Eastern Insurance Group. (2)Includes expenses associated with certain employee post-retirement benefit plan expenses. (3)Includes depreciation expense associated with buildings and related improvements and ROU asset amortization related to one lease which were not disposed of and were transferred to the Bank as of January 1, 2024. (4)Includes intercompany expenses and other credits associated with the Defined Benefit Plan and the BEP. Components of net periodic benefit cost associated with the Defined Benefit Plan and the BEP included in other noninterest expense above were a net credit for the periods presented.
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Parent Company Financial Statements (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Condensed Financial Information Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Condensed Balance Sheet |
(1)Includes $195.0 million and $185.0 million that is eliminated in consolidation as of December 31, 2025 and 2024, respectively.
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| Schedule of Condensed Income Statement |
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| Schedule of Condensed Cash Flow Statement |
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Summary of Significant Accounting Policies (Details) |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2025
USD ($)
reporting_unit
h
plan
segment
|
Dec. 31, 2024
USD ($)
|
Nov. 01, 2020 |
Oct. 31, 2020 |
|
| Finite-Lived Intangible Assets [Line Items] | ||||
| Restricted cash | $ 5,000,000.0 | $ 30,000,000.0 | ||
| Other real estate | $ 0 | $ 0 | ||
| Number of reporting units | reporting_unit | 1 | |||
| Weighted average useful life | 7 years 6 months | |||
| Defined benefit plan, age requirement | 21 years | |||
| Defined benefit plan, service requirement | 1 year | |||
| Defined benefit plan, service requirement for full vesting for individuals employed on or before October 21, 1989 | 3 years | |||
| Defined benefit plan, service requirement for full vesting for individuals employed subsequent to October 31, 1989 | 5 years | |||
| Number of deferred compensation plans | plan | 4 | |||
| Number of reportable segments | segment | 1 | |||
| Pension Plan | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Contribution credits rate | 4.80% | 4.60% | ||
| Qualified Plan | Pension Plan | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Defined benefit plan, minimum working hours for eligibility | h | 1,000 | |||
| Defined benefit plan, treasury rate, term | 30 years | |||
| Contribution credits rate | 3.50% | |||
| Defined benefit plan, normal retirement age | 65 years | |||
| Nonqualified Plan | Pension Plan | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Contribution credits rate | 5.00% | |||
| Core deposit intangibles | Minimum | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Weighted average useful life | 5 years | |||
| Core deposit intangibles | Maximum | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Weighted average useful life | 7 years | |||
| Customer list intangible | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Weighted average useful life | 11 years | |||
| Trade name intangible | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Weighted average useful life | 5 years |
Mergers and Acquisitions - Narrative (Details) |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
|
Nov. 01, 2025
USD ($)
lease_obligation
branch
premises
property
$ / shares
shares
|
Oct. 31, 2025
USD ($)
$ / shares
|
Jul. 12, 2024
USD ($)
premises
property
branch
lease_obligation
$ / shares
shares
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2022
USD ($)
|
|
| Business Combination [Line Items] | |||||||
| Goodwill | $ 1,117,148,000 | $ 914,957,000 | $ 557,635,000 | ||||
| Initial reserve on PCD loans at merger | 61,170,000 | 55,830,000 | |||||
| Initial reserve on PSL’s at merger | 42,560,000 | ||||||
| Allowance for loan losses | 331,841,000 | 228,952,000 | 148,993,000 | $ 142,211,000 | |||
| Unfunded Loan Commitment | |||||||
| Business Combination [Line Items] | |||||||
| Allowance for loan losses | 16,400,000 | 13,100,000 | |||||
| HarborOne Bancorp, Inc. | |||||||
| Business Combination [Line Items] | |||||||
| Common stock exchanged (in shares) | shares | 0.765 | ||||||
| Common stock exchanged (in dollars per share) | $ / shares | $ 12.00 | ||||||
| Issuance of restricted stock awards (in shares) | shares | 26,900,000 | ||||||
| Aggregate cash amount | $ 74,600,000 | ||||||
| Common stock, par value (in dollars per share) | $ / shares | $ 17.53 | ||||||
| Common stock | $ 550,100,000 | ||||||
| Goodwill | 202,191,000 | ||||||
| Investment securities premium (discount) acquired | 100,000 | ||||||
| Gain (loss) on sale of investments | 0 | ||||||
| Fair value estimated discount | 249,400,000 | ||||||
| Initial reserve on PCD loans at merger | 61,171,000 | ||||||
| Initial reserve on PSL’s at merger | $ 42,600,000 | ||||||
| Number of branches acquired | branch | 30 | ||||||
| Number of owned premises | premises | 14 | ||||||
| Number of corporate properties acquired | property | 16 | ||||||
| Number of lease obligations | lease_obligation | 30 | ||||||
| Right-of-use asset acquired | $ 10,500,000 | ||||||
| Intangible assets | 82,760,000 | ||||||
| Bank owned life insurance | 98,777,000 | ||||||
| Certificate of deposit discount (premium) | (2,700,000) | ||||||
| FHLB advances premium | 2,500,000 | ||||||
| Acquisition-related and professional fee costs | $ 35,688,000 | 0 | |||||
| HarborOne Bancorp, Inc. | Unfunded Loan Commitment | |||||||
| Business Combination [Line Items] | |||||||
| Fair value estimated discount | $ 2,900,000 | ||||||
| HarborOne Bancorp, Inc. | Minimum | |||||||
| Business Combination [Line Items] | |||||||
| Percentage of maximum stock consideration | 75.00% | ||||||
| HarborOne Bancorp, Inc. | Maximum | |||||||
| Business Combination [Line Items] | |||||||
| Percentage of maximum stock consideration | 85.00% | ||||||
| HarborOne Bancorp, Inc. | Core deposit intangibles | |||||||
| Business Combination [Line Items] | |||||||
| Intangible assets | $ 82,800,000 | ||||||
| Weighted average useful life acquired | 7 years | ||||||
| Cambridge Bancorp | |||||||
| Business Combination [Line Items] | |||||||
| Common stock exchanged (in shares) | shares | 4.956 | ||||||
| Issuance of restricted stock awards (in shares) | shares | 38,900,000 | ||||||
| Common stock, par value (in dollars per share) | $ / shares | $ 14.87 | ||||||
| Common stock | $ 580,600,000 | ||||||
| Goodwill | 357,322,000 | ||||||
| Investment securities premium (discount) acquired | (158,900,000) | ||||||
| Gain (loss) on sale of investments | 0 | ||||||
| Fair value estimated discount | 277,000,000.0 | ||||||
| Initial reserve on PCD loans at merger | $ 55,830,000 | ||||||
| Number of branches acquired | branch | 18 | ||||||
| Number of owned premises | premises | 5 | ||||||
| Number of corporate properties acquired | property | 2 | ||||||
| Number of lease obligations | lease_obligation | 23 | ||||||
| Right-of-use asset acquired | $ 25,500,000 | ||||||
| Intangible assets | 141,200,000 | ||||||
| Bank owned life insurance | 35,676,000 | ||||||
| Certificate of deposit discount (premium) | 1,600,000 | ||||||
| Acquisition-related and professional fee costs | $ 36,664,000 | $ 5,495,000 | |||||
| Allowance for loan losses | 40,900,000 | ||||||
| Lease liability acquired | 32,000,000.0 | ||||||
| Business acquisition, goodwill, expected tax deductible amount | 0 | ||||||
| Cambridge Bancorp | Core deposit intangibles | |||||||
| Business Combination [Line Items] | |||||||
| Intangible assets | $ 115,000,000.0 | ||||||
| Weighted average useful life acquired | 7 years | ||||||
| Cambridge Bancorp | Customer list intangible | |||||||
| Business Combination [Line Items] | |||||||
| Intangible assets | $ 25,000,000.0 | ||||||
| Weighted average useful life acquired | 11 years | ||||||
| Cambridge Bancorp | Trade name intangible | |||||||
| Business Combination [Line Items] | |||||||
| Intangible assets | $ 1,200,000 | ||||||
| Weighted average useful life acquired | 5 years | ||||||
Mergers and Acquisitions - Schedule of Estimated Fair Values of the Assets Acquired and the Liabilities Assumed (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Nov. 01, 2025 |
Dec. 31, 2024 |
Jul. 12, 2024 |
Dec. 31, 2023 |
|---|---|---|---|---|---|
| Assets | |||||
| Goodwill | $ 1,117,148 | $ 914,957 | $ 557,635 | ||
| HarborOne Bancorp, Inc. | |||||
| Assets | |||||
| Cash and cash equivalents | $ 73,234 | ||||
| Investment securities | 300,194 | ||||
| Loans held for sale | 30,905 | ||||
| Loans | 4,490,540 | ||||
| Allowance for loan losses | (103,730) | ||||
| FHLB stock | 24,741 | ||||
| Premises and equipment | 48,951 | ||||
| Bank owned life insurance | 98,777 | ||||
| Goodwill | 202,191 | ||||
| Intangible assets | 82,760 | ||||
| Deferred income taxes, net | 82,213 | ||||
| Prepaid expense | 5,058 | ||||
| Other assets | 131,075 | ||||
| Total assets acquired | 5,466,909 | ||||
| Liabilities | |||||
| Deposits | 4,333,162 | ||||
| FHLB advances | 518,103 | ||||
| Other liabilities | 65,532 | ||||
| Total liabilities assumed | 4,916,797 | ||||
| Purchase price | 550,112 | ||||
| Fair value of time deposits | $ 1,400,000 | ||||
| Cambridge Bancorp | |||||
| Assets | |||||
| Cash and cash equivalents | $ 24,885 | ||||
| Investment securities | 883,021 | ||||
| Loans | 3,650,600 | ||||
| Allowance for loan losses | (55,830) | ||||
| FHLB stock | 27,255 | ||||
| Premises and equipment | 23,417 | ||||
| Bank owned life insurance | 35,676 | ||||
| Goodwill | 357,322 | ||||
| Intangible assets | 141,200 | ||||
| Deferred income taxes, net | 107,989 | ||||
| Other assets | 134,608 | ||||
| Total assets acquired | 5,330,143 | ||||
| Liabilities | |||||
| Deposits | 3,877,350 | ||||
| FHLB advances | 782,000 | ||||
| Other liabilities | 90,200 | ||||
| Total liabilities assumed | 4,749,550 | ||||
| Purchase price | 580,593 | ||||
| Fair value of time deposits | $ 418,700 |
Mergers and Acquisitions - Schedule of Difference Between the Purchase Price and Par Value of the Assets Acquired (Details) - USD ($) $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
Nov. 01, 2025 |
Jul. 12, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Business Combination [Line Items] | ||||
| Allowance for loan losses on PCD loans | $ (61,170) | $ (55,830) | ||
| HarborOne Bancorp, Inc. | ||||
| Business Combination [Line Items] | ||||
| Gross amortized cost basis | $ 567,614 | |||
| Allowance for loan losses on PCD loans | (61,171) | |||
| Interest and liquidity discount | (52,986) | |||
| Purchase price of PCD loans (at fair value) | $ 453,457 | |||
| Cambridge Bancorp | ||||
| Business Combination [Line Items] | ||||
| Gross amortized cost basis | $ 356,148 | |||
| Allowance for loan losses on PCD loans | (55,830) | |||
| Interest and liquidity discount | (26,019) | |||
| Purchase price of PCD loans (at fair value) | $ 274,299 | |||
Mergers and Acquisitions - Schedule of Merger-Related Expenses (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| HarborOne Bancorp, Inc. | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | $ 35,688,000 | $ 0 | |
| Cambridge Bancorp | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 36,664,000 | $ 5,495,000 | |
| Salaries and employee benefits | HarborOne Bancorp, Inc. | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 14,214,000 | ||
| Salaries and employee benefits | Cambridge Bancorp | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 14,719,000 | 5,000 | |
| Occupancy and equipment | HarborOne Bancorp, Inc. | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 3,012,000 | ||
| Occupancy and equipment | Cambridge Bancorp | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 4,583,000 | 2,000 | |
| Technology and data processing | HarborOne Bancorp, Inc. | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 1,626,000 | ||
| Technology and data processing | Cambridge Bancorp | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 4,919,000 | 1,357,000 | |
| Professional services | HarborOne Bancorp, Inc. | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 10,210,000 | ||
| Professional services | Cambridge Bancorp | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 7,320,000 | 4,080,000 | |
| Marketing | HarborOne Bancorp, Inc. | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 513,000 | ||
| Marketing | Cambridge Bancorp | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | 70,000 | 0 | |
| Other non-operating expenses | HarborOne Bancorp, Inc. | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | $ 6,113,000 | ||
| Other non-operating expenses | Cambridge Bancorp | |||
| Business Combination [Line Items] | |||
| Acquisition-related and professional fee costs | $ 5,053,000 | $ 51,000 | |
Mergers and Acquisitions - Schedule of Pro Forma Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| HarborOne Bancorp, Inc. | |||
| Business Combination [Line Items] | |||
| Net interest income | $ 972,044 | $ 789,460 | |
| Net income (loss) | $ 140,816 | 148,673 | |
| Cambridge Bancorp | |||
| Business Combination [Line Items] | |||
| Net interest income | 681,467 | $ 722,380 | |
| Net income (loss) | $ 126,158 | $ (4,342) | |
Securities - Schedule of Debt Securities (Details) - USD ($) |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized Cost | $ 4,143,163,000 | $ 4,778,644,000 |
| Unrealized Gains | 29,609,000 | 0 |
| Unrealized Losses | (347,203,000) | (757,046,000) |
| Allowance for Credit Losses | 0 | 0 |
| Fair Value | 3,825,569,000 | 4,021,598,000 |
| Government-sponsored residential mortgage-backed securities | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized Cost | 2,753,311,000 | 3,099,328,000 |
| Unrealized Gains | 19,846,000 | 0 |
| Unrealized Losses | (239,848,000) | (537,433,000) |
| Allowance for Credit Losses | 0 | 0 |
| Fair Value | 2,533,309,000 | 2,561,895,000 |
| Government-sponsored commercial mortgage-backed securities | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized Cost | 1,148,394,000 | 1,362,519,000 |
| Unrealized Gains | 9,388,000 | 0 |
| Unrealized Losses | (97,451,000) | (201,408,000) |
| Allowance for Credit Losses | 0 | 0 |
| Fair Value | 1,060,331,000 | 1,161,111,000 |
| U.S. Agency bonds | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized Cost | 19,608,000 | |
| Unrealized Gains | 0 | |
| Unrealized Losses | (1,936,000) | |
| Allowance for Credit Losses | 0 | |
| Fair Value | 17,672,000 | |
| U.S. Treasury securities | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized Cost | 50,030,000 | 99,784,000 |
| Unrealized Gains | 320,000 | 0 |
| Unrealized Losses | 0 | (2,165,000) |
| Allowance for Credit Losses | 0 | 0 |
| Fair Value | 50,350,000 | 97,619,000 |
| State and municipal bonds and obligations | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Amortized Cost | 191,428,000 | 197,405,000 |
| Unrealized Gains | 55,000 | 0 |
| Unrealized Losses | (9,904,000) | (14,104,000) |
| Allowance for Credit Losses | 0 | 0 |
| Fair Value | $ 181,579,000 | $ 183,301,000 |
Securities - Narrative (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Debt Securities, Available-for-sale [Line Items] | ||
| Debt securities, available-for-sale, allowance for credit loss, excluding accrued interest | $ 0 | $ 0 |
| Debt securities, available-for-sale, accrued interest, after allowance for credit loss | $ 11,900,000 | $ 8,900,000 |
| Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets |
| Debt securities, available-for-sale, accrued interest writeoff | $ 0 | $ 0 |
| Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest | 0 | 0 |
| Debt securities, held-to-maturity, accrued interest, after allowance for credit loss | $ 3,600,000 | $ 900,000 |
| Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets |
| Debt securities, held-to-maturity, accrued interest, writeoff | $ 0 | $ 0 |
| Debt securities, available-for-sale and held-to-maturity, fair value | 4,401,543,000 | 4,393,322,000 |
| Federal Home Loan Bank of Boston | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Deposit liabilities, collateral issued, financial instruments | 200,000,000 | 1,000,000,000.0 |
| Other Purposes Required By Law | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Deposit liabilities, collateral issued, financial instruments | 692,900,000 | 687,900,000 |
| Federal Reserve Discount Window | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Deposit liabilities, collateral issued, financial instruments | 414,200,000 | 794,800,000 |
| Callable Securities | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Debt securities, available-for-sale and held-to-maturity, fair value | $ 385,500,000 | $ 196,400,000 |
Securities - Schedule of Realized Gain (Loss) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Debt Securities [Abstract] | |||
| Gross realized gains from sales of AFS securities | $ 0 | $ 0 | $ 0 |
| Gross realized losses from sales of AFS securities | (269,638) | (16,798) | (333,170) |
| Net losses from sales of AFS securities | $ (269,638) | $ (16,798) | $ (333,170) |
Securities - Schedule of Government-Sponsored Residential Mortgage-Backed Securities with Gross Unrealized Losses (Details $ in Thousands |
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
|---|---|---|
| Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] | ||
| Number of holdings | 639 | 756 |
| Gross Unrealized Losses | ||
| Less than 12 Months | $ 325 | $ 855 |
| 12 Months or Longer | 346,878 | 756,191 |
| Total | 347,203 | 757,046 |
| Fair Value | ||
| Less than 12 Months | 78,231 | 218,888 |
| 12 Months or Longer | 2,277,277 | 3,802,710 |
| Total | $ 2,355,508 | $ 4,021,598 |
| Government-sponsored residential mortgage-backed securities | ||
| Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] | ||
| Number of holdings | 292 | 324 |
| Gross Unrealized Losses | ||
| Less than 12 Months | $ 317 | $ 9 |
| 12 Months or Longer | 239,531 | 537,424 |
| Total | 239,848 | 537,433 |
| Fair Value | ||
| Less than 12 Months | 74,415 | 113,326 |
| 12 Months or Longer | 1,511,918 | 2,448,569 |
| Total | $ 1,586,333 | $ 2,561,895 |
| Government-sponsored commercial mortgage-backed securities | ||
| Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] | ||
| Number of holdings | 148 | 187 |
| Gross Unrealized Losses | ||
| Less than 12 Months | $ 0 | $ 27 |
| 12 Months or Longer | 97,451 | 201,381 |
| Total | 97,451 | 201,408 |
| Fair Value | ||
| Less than 12 Months | 0 | 86,201 |
| 12 Months or Longer | 608,386 | 1,074,910 |
| Total | $ 608,386 | $ 1,161,111 |
| U.S. Agency bonds | ||
| Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] | ||
| Number of holdings | 1 | |
| Gross Unrealized Losses | ||
| Less than 12 Months | $ 0 | |
| 12 Months or Longer | 1,936 | |
| Total | 1,936 | |
| Fair Value | ||
| Less than 12 Months | 0 | |
| 12 Months or Longer | 17,672 | |
| Total | $ 17,672 | |
| U.S. Treasury securities | ||
| Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] | ||
| Number of holdings | 6 | |
| Gross Unrealized Losses | ||
| Less than 12 Months | $ 0 | |
| 12 Months or Longer | 2,165 | |
| Total | 2,165 | |
| Fair Value | ||
| Less than 12 Months | 0 | |
| 12 Months or Longer | 97,619 | |
| Total | $ 97,619 | |
| State and municipal bonds and obligations | ||
| Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] | ||
| Number of holdings | 199 | 238 |
| Gross Unrealized Losses | ||
| Less than 12 Months | $ 8 | $ 819 |
| 12 Months or Longer | 9,896 | 13,285 |
| Total | 9,904 | 14,104 |
| Fair Value | ||
| Less than 12 Months | 3,816 | 19,361 |
| 12 Months or Longer | 156,973 | 163,940 |
| Total | $ 160,789 | $ 183,301 |
Securities - Schedule of Debt Securities, Held-to-Maturity (Details) - USD ($) |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Schedule of Held-to-Maturity Securities [Line Items] | ||
| Amortized Cost | $ 599,557,000 | $ 420,715,000 |
| Unrealized Gains | 4,012,000 | 0 |
| Unrealized Losses | (27,595,000) | (48,991,000) |
| Allowance for Credit Losses | 0 | 0 |
| Fair Value | 575,974,000 | 371,724,000 |
| Government-sponsored residential mortgage-backed securities | ||
| Schedule of Held-to-Maturity Securities [Line Items] | ||
| Amortized Cost | 210,142,000 | 231,709,000 |
| Unrealized Gains | 0 | 0 |
| Unrealized Losses | (15,595,000) | (29,438,000) |
| Allowance for Credit Losses | 0 | 0 |
| Fair Value | 194,547,000 | 202,271,000 |
| Government-sponsored commercial mortgage-backed securities | ||
| Schedule of Held-to-Maturity Securities [Line Items] | ||
| Amortized Cost | 185,185,000 | 189,006,000 |
| Unrealized Gains | 0 | 0 |
| Unrealized Losses | (11,601,000) | (19,553,000) |
| Allowance for Credit Losses | 0 | 0 |
| Fair Value | 173,584,000 | $ 169,453,000 |
| State and municipal bonds and obligations | ||
| Schedule of Held-to-Maturity Securities [Line Items] | ||
| Amortized Cost | 167,346,000 | |
| Unrealized Gains | 2,914,000 | |
| Unrealized Losses | (399,000) | |
| Allowance for Credit Losses | 0 | |
| Fair Value | 169,861,000 | |
| Corporate debt bonds | ||
| Schedule of Held-to-Maturity Securities [Line Items] | ||
| Amortized Cost | 36,884,000 | |
| Unrealized Gains | 1,098,000 | |
| Unrealized Losses | 0 | |
| Allowance for Credit Losses | 0 | |
| Fair Value | $ 37,982,000 |
Securities - Schedule of Fair Value of Available for Sale Securities by Contractual Maturities (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| AFS securities | ||
| Due in one year or less, Amortized Cost | $ 68,259 | $ 55,876 |
| Due in one year or less, Fair value | 68,386 | 55,593 |
| Due after one year to five years, Amortized Cost | 647,426 | 560,992 |
| Due after one year to five years, Fair value | 650,113 | 522,979 |
| Due after five to ten years, Amortized Cost | 123,396 | 335,084 |
| Due after five to ten years, Fair value | 117,130 | 296,864 |
| Due after ten years, Amortized Cost | 3,304,082 | 3,826,692 |
| Due after ten years, Fair value | 2,989,940 | 3,146,162 |
| Amortized Cost | 4,143,163 | 4,778,644 |
| Fair Value | 3,825,569 | 4,021,598 |
| HTM securities | ||
| Due in one year or less, Amortized Cost | 0 | 0 |
| Due in one year or less, Fair value | 0 | 0 |
| Due after one year to five years, Amortized Cost | 131,313 | 133,168 |
| Due after one year to five years, Fair value | 125,047 | 121,471 |
| Due after five to ten years, Amortized Cost | 90,756 | 55,838 |
| Due after five to ten years, Fair value | 86,519 | 47,982 |
| Due after ten years, Amortized Cost | 377,488 | 231,709 |
| Due after ten years, Fair value | 364,408 | 202,271 |
| Amortized Cost | 599,557 | 420,715 |
| Fair Value | 575,974 | 371,724 |
| Total | ||
| Due in one year or less, Amortized Cost | 68,259 | 55,876 |
| Due in one year or less, Fair value | 68,386 | 55,593 |
| Due after one year to five years, Amortized Cost | 778,739 | 694,160 |
| Due after one year to five years, Fair value | 775,160 | 644,450 |
| Due after five to ten years, Amortized Cost | 214,152 | 390,922 |
| Due after five to ten years, Fair value | 203,649 | 344,846 |
| Due after ten years, Amortized Cost | 3,681,570 | 4,058,401 |
| Due after ten years, Fair value | 3,354,348 | 3,348,433 |
| Amortized Cost | 4,742,720 | 5,199,359 |
| Fair Value | 4,401,543 | 4,393,322 |
| Government-sponsored residential mortgage-backed securities | ||
| AFS securities | ||
| Due in one year or less, Amortized Cost | 661 | 561 |
| Due in one year or less, Fair value | 657 | 557 |
| Due after one year to five years, Amortized Cost | 10,753 | 21,535 |
| Due after one year to five years, Fair value | 10,602 | 20,940 |
| Due after five to ten years, Amortized Cost | 22,179 | 13,212 |
| Due after five to ten years, Fair value | 21,006 | 12,268 |
| Due after ten years, Amortized Cost | 2,719,718 | 3,064,020 |
| Due after ten years, Fair value | 2,501,044 | 2,528,130 |
| Amortized Cost | 2,753,311 | 3,099,328 |
| Fair Value | 2,533,309 | 2,561,895 |
| HTM securities | ||
| Due in one year or less, Amortized Cost | 0 | 0 |
| Due in one year or less, Fair value | 0 | 0 |
| Due after one year to five years, Amortized Cost | 0 | 0 |
| Due after one year to five years, Fair value | 0 | 0 |
| Due after five to ten years, Amortized Cost | 0 | 0 |
| Due after five to ten years, Fair value | 0 | 0 |
| Due after ten years, Amortized Cost | 210,142 | 231,709 |
| Due after ten years, Fair value | 194,547 | 202,271 |
| Amortized Cost | 210,142 | 231,709 |
| Fair Value | 194,547 | 202,271 |
| Government-sponsored commercial mortgage-backed securities | ||
| AFS securities | ||
| Due in one year or less, Amortized Cost | 10,528 | 0 |
| Due in one year or less, Fair value | 10,368 | 0 |
| Due after one year to five years, Amortized Cost | 601,026 | 436,515 |
| Due after one year to five years, Fair value | 604,330 | 404,181 |
| Due after five to ten years, Amortized Cost | 48,278 | 270,546 |
| Due after five to ten years, Fair value | 43,673 | 235,853 |
| Due after ten years, Amortized Cost | 488,562 | 655,458 |
| Due after ten years, Fair value | 401,960 | 521,077 |
| Amortized Cost | 1,148,394 | 1,362,519 |
| Fair Value | 1,060,331 | 1,161,111 |
| HTM securities | ||
| Due in one year or less, Amortized Cost | 0 | 0 |
| Due in one year or less, Fair value | 0 | 0 |
| Due after one year to five years, Amortized Cost | 130,301 | 133,168 |
| Due after one year to five years, Fair value | 124,033 | 121,471 |
| Due after five to ten years, Amortized Cost | 54,884 | 55,838 |
| Due after five to ten years, Fair value | 49,551 | 47,982 |
| Due after ten years, Amortized Cost | 0 | 0 |
| Due after ten years, Fair value | 0 | 0 |
| Amortized Cost | 185,185 | 189,006 |
| Fair Value | 173,584 | 169,453 |
| U.S. Agency bonds | ||
| AFS securities | ||
| Due in one year or less, Amortized Cost | 0 | |
| Due in one year or less, Fair value | 0 | |
| Due after one year to five years, Amortized Cost | 19,608 | |
| Due after one year to five years, Fair value | 17,672 | |
| Due after five to ten years, Amortized Cost | 0 | |
| Due after five to ten years, Fair value | 0 | |
| Due after ten years, Amortized Cost | 0 | |
| Due after ten years, Fair value | 0 | |
| Amortized Cost | 19,608 | |
| Fair Value | 17,672 | |
| U.S. Treasury securities | ||
| AFS securities | ||
| Due in one year or less, Amortized Cost | 50,030 | 49,947 |
| Due in one year or less, Fair value | 50,350 | 49,717 |
| Due after one year to five years, Amortized Cost | 0 | 49,837 |
| Due after one year to five years, Fair value | 0 | 47,902 |
| Due after five to ten years, Amortized Cost | 0 | 0 |
| Due after five to ten years, Fair value | 0 | 0 |
| Due after ten years, Amortized Cost | 0 | 0 |
| Due after ten years, Fair value | 0 | 0 |
| Amortized Cost | 50,030 | 99,784 |
| Fair Value | 50,350 | 97,619 |
| State and municipal bonds and obligations | ||
| AFS securities | ||
| Due in one year or less, Amortized Cost | 7,040 | 5,368 |
| Due in one year or less, Fair value | 7,011 | 5,319 |
| Due after one year to five years, Amortized Cost | 35,647 | 33,497 |
| Due after one year to five years, Fair value | 35,181 | 32,284 |
| Due after five to ten years, Amortized Cost | 52,939 | 51,326 |
| Due after five to ten years, Fair value | 52,451 | 48,743 |
| Due after ten years, Amortized Cost | 95,802 | 107,214 |
| Due after ten years, Fair value | 86,936 | 96,955 |
| Amortized Cost | 191,428 | 197,405 |
| Fair Value | 181,579 | $ 183,301 |
| HTM securities | ||
| Due in one year or less, Amortized Cost | 0 | |
| Due in one year or less, Fair value | 0 | |
| Due after one year to five years, Amortized Cost | 0 | |
| Due after one year to five years, Fair value | 0 | |
| Due after five to ten years, Amortized Cost | 0 | |
| Due after five to ten years, Fair value | 0 | |
| Due after ten years, Amortized Cost | 167,346 | |
| Due after ten years, Fair value | 169,861 | |
| Amortized Cost | 167,346 | |
| Fair Value | 169,861 | |
| Corporate debt bonds | ||
| HTM securities | ||
| Due in one year or less, Amortized Cost | 0 | |
| Due in one year or less, Fair value | 0 | |
| Due after one year to five years, Amortized Cost | 1,012 | |
| Due after one year to five years, Fair value | 1,014 | |
| Due after five to ten years, Amortized Cost | 35,872 | |
| Due after five to ten years, Fair value | 36,968 | |
| Due after ten years, Amortized Cost | 0 | |
| Due after ten years, Fair value | 0 | |
| Amortized Cost | 36,884 | |
| Fair Value | $ 37,982 |
Mortgage Banking - Narrative (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Nov. 01, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Assets that Continue to be Recognized, Securitized or Asset-Backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items] | |||
| Unpaid principal balances of mortgage loans serviced | $ 3,300.0 | $ 228.4 | |
| Amortized cost, fair value | $ 1.4 | $ 2.1 | |
| HarborOne Bancorp, Inc. | |||
| Assets that Continue to be Recognized, Securitized or Asset-Backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items] | |||
| Mortgage servicing rights acquired | $ 39.7 |
Mortgage Banking - Schedule of Weighted Average Assumptions Used in the Calculation of Fair Value of MSRs (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Transfers and Servicing [Abstract] | |
| Prepayment speed | 7.84% |
| Discount rate | 9.86% |
| Default rate | 1.88% |
Mortgage Banking - Schedule of Changes to MSRs (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Nov. 01, 2025 |
|
| Servicing Asset at Fair Value, Amount [Roll Forward] | |||
| Beginning balance | $ 2,076 | $ 0 | |
| Additions | 39,820 | 2,422 | |
| Changes in fair value due to: | |||
| Reductions from loan paydowns off during the period | (682) | 0 | |
| Changes in valuation inputs or assumptions | 187 | 0 | |
| Amortization | (692) | (346) | |
| Ending balance | $ 40,709 | $ 2,076 | |
| HarborOne Bancorp, Inc. | |||
| Changes in fair value due to: | |||
| MSRs acquired | $ 39,700 | ||
Mortgage Banking - Schedule of Components of Mortgage Banking Income (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Transfers and Servicing [Abstract] | |||
| Servicing fees | $ 1,934 | $ 420 | $ 209 |
| Gain on sale of mortgage loans | 2,131 | (961) | (478) |
| Change in MSR fair value and amortization expense | (1,188) | 0 | 0 |
| Other | 0 | (346) | 0 |
| Total mortgage banking income | $ 2,877 | $ (887) | $ (269) |
Loans and Allowance for Credit Losses - Summary of Company's Loan Portfolio as of the Dates Indicated (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|---|---|
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||||
| Gross loans before unearned discounts and deferred fees, net | $ 23,574,496 | $ 18,079,084 | ||
| Allowance for loan losses | (331,841) | (228,952) | $ (148,993) | $ (142,211) |
| Unearned discounts and deferred fees, net | (489,431) | (300,730) | ||
| Net loans | 22,753,224 | 17,549,402 | ||
| Financing receivable, accrued interest, before allowance for credit loss | 81,900 | 66,700 | ||
| Commercial Portfolio Segment | Commercial and industrial | ||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||||
| Gross loans before unearned discounts and deferred fees, net | 4,324,615 | 3,296,068 | ||
| Allowance for loan losses | (65,768) | (41,090) | (26,959) | (26,859) |
| Commercial Portfolio Segment | Commercial real estate | ||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||||
| Gross loans before unearned discounts and deferred fees, net | 9,529,071 | 7,119,523 | ||
| Allowance for loan losses | (164,376) | (116,175) | (65,475) | (54,730) |
| Commercial Portfolio Segment | Commercial construction | ||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||||
| Gross loans before unearned discounts and deferred fees, net | 567,597 | 494,842 | ||
| Allowance for loan losses | (21,058) | (8,462) | (6,666) | (7,085) |
| Commercial Portfolio Segment | Business banking | ||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||||
| Gross loans before unearned discounts and deferred fees, net | 1,603,489 | 1,448,176 | ||
| Allowance for loan losses | (22,921) | (19,899) | (14,913) | (16,189) |
| Residential Portfolio Segment | Residential real estate | ||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||||
| Gross loans before unearned discounts and deferred fees, net | 5,516,114 | 4,063,659 | ||
| Allowance for loan losses | (44,177) | (32,291) | (25,954) | (28,129) |
| Consumer Portfolio Segment | Consumer home equity | ||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||||
| Gross loans before unearned discounts and deferred fees, net | 1,758,099 | 1,385,394 | ||
| Allowance for loan losses | (9,171) | (7,472) | (5,595) | (6,454) |
| Consumer Portfolio Segment | Other Consumer | ||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||||
| Gross loans before unearned discounts and deferred fees, net | 275,511 | 271,422 | ||
| Allowance for loan losses | $ (4,370) | $ (3,563) | $ (3,431) | $ (2,765) |
Loans and Allowance for Credit Losses - Narrative (Details) |
12 Months Ended | ||||
|---|---|---|---|---|---|
|
Dec. 31, 2025
USD ($)
loan
|
Dec. 31, 2024
USD ($)
commitment
loan
|
Dec. 31, 2023
USD ($)
|
Jul. 12, 2024
USD ($)
|
Dec. 31, 2022
USD ($)
|
|
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Loan syndications, amount | $ 100,000,000 | ||||
| Financing receivable, excluding accrued interest, after allowance for credit loss | 22,753,224,000 | $ 17,549,402,000 | |||
| FHLB advances | 199,617,000 | 17,589,000 | |||
| Debt, long-term and short-term, combined amount | 214,938,000 | 66,179,000 | |||
| Financing receivable, allowance for credit loss, excluding accrued interest | $ 331,841,000 | 228,952,000 | $ 148,993,000 | $ 142,211,000 | |
| Maximum number of days required for special mention | 90 days | ||||
| Loans modified during the prior 12 months which had subsequently defaulted | $ 300,000 | 500,000 | 0 | ||
| Financing receivable, modified, commitment to lend | 0 | $ 300,000 | |||
| Number of additional commitments to lend | commitment | 1 | ||||
| Cambridge Bancorp | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Initial provision for allowance for loan losses for acquired non-PCD loans | $ 40,900,000 | ||||
| Financing receivable, allowance for credit loss, excluding accrued interest | $ 40,900,000 | ||||
| Commercial Portfolio Segment | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Financing receivable, collateral dependent loans | 133,500,000 | 107,700,000 | |||
| Residential Portfolio Segment | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Financing receivable, collateral dependent loans | 4,400,000 | 1,100,000 | |||
| Unrated | Minimum | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Lines of credit, exposure | 100,000 | ||||
| Unfunded Loan Commitment | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Financing receivable, allowance for credit loss, excluding accrued interest | 16,400,000 | 13,100,000 | |||
| Business banking | Commercial Portfolio Segment | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Financing receivable, allowance for credit loss, excluding accrued interest | 22,921,000 | 19,899,000 | 14,913,000 | 16,189,000 | |
| Business banking | Line of Credit | Unrated | Commercial Portfolio Segment | Maximum | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Lines of credit, exposure | 1,500,000 | ||||
| Residential real estate | Residential Portfolio Segment | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Financing receivable, allowance for credit loss, excluding accrued interest | $ 44,177,000 | $ 32,291,000 | 25,954,000 | 28,129,000 | |
| Number of loans in process of foreclosure | loan | 12 | 4 | |||
| Mortgage loans in process of foreclosure, amount | $ 3,000,000.0 | $ 400,000 | |||
| Consumer home equity | Consumer Portfolio Segment | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Financing receivable, allowance for credit loss, excluding accrued interest | $ 9,171,000 | $ 7,472,000 | $ 5,595,000 | $ 6,454,000 | |
| Number of loans in process of foreclosure | loan | 4 | 6 | |||
| Mortgage loans in process of foreclosure, amount | $ 300,000 | $ 500,000 | |||
| Federal Home Loan Bank Advances | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| FHLB advances | 199,600,000 | 17,600,000 | |||
| Federal Reserve Bank Advances | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Debt, long-term and short-term, combined amount | 0 | 0 | |||
| Asset Pledged as Collateral | Federal Home Loan Bank Advances | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Financing receivable, excluding accrued interest, after allowance for credit loss | 5,000,000,000.0 | 2,300,000,000 | |||
| Asset Pledged as Collateral | Federal Reserve Bank Advances | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Financing receivable, excluding accrued interest, after allowance for credit loss | $ 5,000,000,000.0 | $ 3,100,000,000 | |||
Loans and Allowance for Credit Losses - Schedule of Changes in Allowance for Loan Losses by Loan Category (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | $ 228,952 | $ 148,993 | $ 142,211 |
| Initial reserve on PCD loans at merger | 61,170 | 55,830 | |
| Initial reserve on PSL’s at merger | 42,560 | ||
| Charge-offs | (34,291) | (47,757) | (15,092) |
| Recoveries | 7,250 | 4,506 | 2,965 |
| Provision (release) | 26,200 | 67,380 | 20,052 |
| Ending balance | 331,841 | 228,952 | 148,993 |
| Allowance for loan losses | 331,841 | 228,952 | 148,993 |
| Cumulative effect accounting adjustment | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | (1,143) | ||
| Allowance for loan losses | |||
| Cumulative effect accounting adjustment | Accounting Standards Update 2022-02 | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 1,100 | ||
| Allowance for loan losses | |||
| Commercial Portfolio Segment | Commercial and industrial | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 41,090 | 26,959 | 26,859 |
| Initial reserve on PCD loans at merger | 7,397 | 6,589 | |
| Initial reserve on PSL’s at merger | 5,096 | ||
| Charge-offs | (10,041) | (40) | (13) |
| Recoveries | 136 | 99 | 296 |
| Provision (release) | 22,090 | 7,483 | (230) |
| Ending balance | 65,768 | 41,090 | 26,959 |
| Allowance for loan losses | 65,768 | 41,090 | 26,959 |
| Commercial Portfolio Segment | Commercial and industrial | Cumulative effect accounting adjustment | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 47 | ||
| Allowance for loan losses | |||
| Commercial Portfolio Segment | Commercial real estate | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 116,175 | 65,475 | 54,730 |
| Initial reserve on PCD loans at merger | 42,196 | 45,656 | |
| Initial reserve on PSL’s at merger | 19,238 | ||
| Charge-offs | (18,818) | (42,556) | (8,008) |
| Recoveries | 3,215 | 2,207 | 198 |
| Provision (release) | 2,370 | 45,393 | 18,555 |
| Ending balance | 164,376 | 116,175 | 65,475 |
| Allowance for loan losses | 164,376 | 116,175 | 65,475 |
| Commercial Portfolio Segment | Commercial real estate | Cumulative effect accounting adjustment | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 0 | ||
| Allowance for loan losses | |||
| Commercial Portfolio Segment | Commercial construction | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 8,462 | 6,666 | 7,085 |
| Initial reserve on PCD loans at merger | 10,014 | 26 | |
| Initial reserve on PSL’s at merger | 814 | ||
| Charge-offs | 0 | 0 | 0 |
| Recoveries | 1,242 | 0 | 0 |
| Provision (release) | 526 | 1,770 | (419) |
| Ending balance | 21,058 | 8,462 | 6,666 |
| Allowance for loan losses | 21,058 | 8,462 | 6,666 |
| Commercial Portfolio Segment | Commercial construction | Cumulative effect accounting adjustment | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 0 | ||
| Allowance for loan losses | |||
| Commercial Portfolio Segment | Business banking | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 19,899 | 14,913 | 16,189 |
| Initial reserve on PCD loans at merger | 43 | 581 | |
| Initial reserve on PSL’s at merger | 3,079 | ||
| Charge-offs | (2,970) | (2,498) | (4,645) |
| Recoveries | 1,648 | 1,189 | 1,867 |
| Provision (release) | 1,222 | 5,714 | 1,642 |
| Ending balance | 22,921 | 19,899 | 14,913 |
| Allowance for loan losses | 22,921 | 19,899 | 14,913 |
| Commercial Portfolio Segment | Business banking | Cumulative effect accounting adjustment | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | (140) | ||
| Allowance for loan losses | |||
| Residential Portfolio Segment | Residential real estate | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 32,291 | 25,954 | 28,129 |
| Initial reserve on PCD loans at merger | 1,472 | 2,919 | |
| Initial reserve on PSL’s at merger | 12,300 | ||
| Charge-offs | (105) | (28) | 0 |
| Recoveries | 146 | 205 | 97 |
| Provision (release) | (1,927) | 3,241 | (1,423) |
| Ending balance | 44,177 | 32,291 | 25,954 |
| Allowance for loan losses | 44,177 | 32,291 | 25,954 |
| Residential Portfolio Segment | Residential real estate | Cumulative effect accounting adjustment | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | (849) | ||
| Allowance for loan losses | |||
| Consumer Portfolio Segment | Consumer home equity | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 7,472 | 5,595 | 6,454 |
| Initial reserve on PCD loans at merger | 35 | 40 | |
| Initial reserve on PSL’s at merger | 1,775 | ||
| Charge-offs | (124) | (59) | (7) |
| Recoveries | 39 | 136 | 41 |
| Provision (release) | (26) | 1,760 | (692) |
| Ending balance | 9,171 | 7,472 | 5,595 |
| Allowance for loan losses | 9,171 | 7,472 | 5,595 |
| Consumer Portfolio Segment | Consumer home equity | Cumulative effect accounting adjustment | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | (201) | ||
| Allowance for loan losses | |||
| Consumer Portfolio Segment | Other Consumer | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | 3,563 | 3,431 | 2,765 |
| Initial reserve on PCD loans at merger | 13 | 19 | |
| Initial reserve on PSL’s at merger | 258 | ||
| Charge-offs | (2,233) | (2,576) | (2,419) |
| Recoveries | 824 | 670 | 466 |
| Provision (release) | 1,945 | 2,019 | 2,619 |
| Ending balance | 4,370 | 3,563 | 3,431 |
| Allowance for loan losses | $ 4,370 | $ 3,563 | 3,431 |
| Consumer Portfolio Segment | Other Consumer | Cumulative effect accounting adjustment | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Beginning balance | $ 0 | ||
| Allowance for loan losses | |||
Loans and Allowance for Credit Losses - Schedule of Internal Risk-rating Categories (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | $ 2,254,178 | $ 1,481,079 | |
| Fiscal year before current fiscal year | 1,373,566 | 1,887,458 | |
| Two years before current fiscal year | 1,591,820 | 3,630,977 | |
| Three years before current fiscal year | 3,350,316 | 2,680,516 | |
| Four years before current fiscal year | 2,476,097 | 1,802,701 | |
| Prior | 9,533,360 | 4,269,764 | |
| Revolving Loans | 2,474,558 | 1,967,952 | |
| Revolving Loans Converted to Term Loans | 31,170 | 57,907 | |
| Total | 23,085,065 | 17,778,354 | |
| Current period gross charge-offs | |||
| Total | 34,291 | 47,757 | $ 15,092 |
| Commercial Portfolio Segment | Commercial and industrial | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 803,273 | 378,771 | |
| Fiscal year before current fiscal year | 267,620 | 412,949 | |
| Two years before current fiscal year | 291,144 | 449,118 | |
| Three years before current fiscal year | 377,934 | 335,468 | |
| Four years before current fiscal year | 328,637 | 343,216 | |
| Prior | 1,367,238 | 751,752 | |
| Revolving Loans | 859,691 | 571,283 | |
| Revolving Loans Converted to Term Loans | 165 | 24,018 | |
| Total | 4,295,702 | 3,266,575 | |
| Current period gross charge-offs | |||
| 2025 | 21 | ||
| 2024 | 0 | ||
| 2023 | 5,004 | ||
| 2022 | 1,487 | ||
| 2021 | 0 | ||
| Prior | 3,529 | ||
| Revolving Loans | 0 | ||
| Revolving Loans Converted to Term Loans | 0 | ||
| Total | 10,041 | 40 | 13 |
| Commercial Portfolio Segment | Commercial and industrial | Pass | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 802,325 | 358,054 | |
| Fiscal year before current fiscal year | 254,247 | 365,372 | |
| Two years before current fiscal year | 252,140 | 407,129 | |
| Three years before current fiscal year | 356,748 | 310,250 | |
| Four years before current fiscal year | 324,957 | 341,049 | |
| Prior | 1,343,323 | 745,815 | |
| Revolving Loans | 792,359 | 522,236 | |
| Revolving Loans Converted to Term Loans | 165 | 22,800 | |
| Total | 4,126,264 | 3,072,705 | |
| Commercial Portfolio Segment | Commercial and industrial | Special Mention | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 948 | 19,721 | |
| Fiscal year before current fiscal year | 2,399 | 25,719 | |
| Two years before current fiscal year | 6,716 | 5,963 | |
| Three years before current fiscal year | 133 | 24,199 | |
| Four years before current fiscal year | 1,314 | 43 | |
| Prior | 2,795 | 4,563 | |
| Revolving Loans | 12,990 | 26,522 | |
| Revolving Loans Converted to Term Loans | 0 | 508 | |
| Total | 27,295 | 107,238 | |
| Commercial Portfolio Segment | Commercial and industrial | Substandard | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 996 | |
| Fiscal year before current fiscal year | 10,974 | 21,858 | |
| Two years before current fiscal year | 22,660 | 30,731 | |
| Three years before current fiscal year | 21,053 | 1,019 | |
| Four years before current fiscal year | 2,366 | 2,124 | |
| Prior | 20,071 | 1,366 | |
| Revolving Loans | 53,495 | 22,525 | |
| Revolving Loans Converted to Term Loans | 0 | 710 | |
| Total | 130,619 | 81,329 | |
| Commercial Portfolio Segment | Commercial and industrial | Doubtful | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 9,628 | 5,295 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 1,049 | 8 | |
| Revolving Loans | 847 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 11,524 | 5,303 | |
| Commercial Portfolio Segment | Commercial and industrial | Loss | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 0 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 0 | 0 | |
| Commercial Portfolio Segment | Commercial real estate | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 794,973 | 544,100 | |
| Fiscal year before current fiscal year | 556,222 | 683,960 | |
| Two years before current fiscal year | 713,193 | 1,784,643 | |
| Three years before current fiscal year | 1,786,829 | 1,052,679 | |
| Four years before current fiscal year | 963,220 | 736,054 | |
| Prior | 4,494,167 | 2,146,409 | |
| Revolving Loans | 103,010 | 85,638 | |
| Revolving Loans Converted to Term Loans | 2,747 | 10,595 | |
| Total | 9,414,361 | 7,044,078 | |
| Current period gross charge-offs | |||
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 10,011 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| Prior | 8,807 | ||
| Revolving Loans | 0 | ||
| Revolving Loans Converted to Term Loans | 0 | ||
| Total | 18,818 | 42,556 | 8,008 |
| Commercial Portfolio Segment | Commercial real estate | Pass | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 794,973 | 531,193 | |
| Fiscal year before current fiscal year | 555,357 | 575,929 | |
| Two years before current fiscal year | 636,603 | 1,740,688 | |
| Three years before current fiscal year | 1,728,805 | 1,020,015 | |
| Four years before current fiscal year | 934,685 | 722,669 | |
| Prior | 4,095,072 | 1,988,069 | |
| Revolving Loans | 102,016 | 82,661 | |
| Revolving Loans Converted to Term Loans | 2,747 | 10,595 | |
| Total | 8,850,258 | 6,671,819 | |
| Commercial Portfolio Segment | Commercial real estate | Special Mention | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 9,457 | |
| Fiscal year before current fiscal year | 865 | 45,188 | |
| Two years before current fiscal year | 14,847 | 26,551 | |
| Three years before current fiscal year | 9,297 | 14,613 | |
| Four years before current fiscal year | 15,127 | 8,855 | |
| Prior | 183,933 | 35,952 | |
| Revolving Loans | 994 | 2,976 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 225,063 | 143,592 | |
| Commercial Portfolio Segment | Commercial real estate | Substandard | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 45,762 | |
| Two years before current fiscal year | 44,397 | 17,404 | |
| Three years before current fiscal year | 48,727 | 18,051 | |
| Four years before current fiscal year | 13,408 | 293 | |
| Prior | 127,105 | 44,713 | |
| Revolving Loans | 0 | 1 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 233,637 | 126,224 | |
| Commercial Portfolio Segment | Commercial real estate | Doubtful | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 3,450 | |
| Fiscal year before current fiscal year | 0 | 17,081 | |
| Two years before current fiscal year | 17,346 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 4,237 | |
| Prior | 88,057 | 77,675 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 105,403 | 102,443 | |
| Commercial Portfolio Segment | Commercial real estate | Loss | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 0 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 0 | 0 | |
| Commercial Portfolio Segment | Commercial construction | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 131,169 | 97,208 | |
| Fiscal year before current fiscal year | 163,330 | 229,600 | |
| Two years before current fiscal year | 103,355 | 132,389 | |
| Three years before current fiscal year | 33,515 | 16,836 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 122,966 | 0 | |
| Revolving Loans | 9,150 | 15,616 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 563,485 | 491,649 | |
| Current period gross charge-offs | |||
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| Prior | 0 | ||
| Revolving Loans | 0 | ||
| Revolving Loans Converted to Term Loans | 0 | ||
| Total | 0 | 0 | 0 |
| Commercial Portfolio Segment | Commercial construction | Pass | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 131,169 | 96,423 | |
| Fiscal year before current fiscal year | 162,907 | 228,979 | |
| Two years before current fiscal year | 103,355 | 132,389 | |
| Three years before current fiscal year | 33,515 | 16,836 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 96,282 | 0 | |
| Revolving Loans | 8,117 | 15,616 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 535,345 | 490,243 | |
| Commercial Portfolio Segment | Commercial construction | Special Mention | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 423 | 621 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 4,671 | 0 | |
| Revolving Loans | 1,033 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 6,127 | 621 | |
| Commercial Portfolio Segment | Commercial construction | Substandard | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 785 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 5,646 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 5,646 | 785 | |
| Commercial Portfolio Segment | Commercial construction | Doubtful | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 16,367 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 16,367 | 0 | |
| Commercial Portfolio Segment | Commercial construction | Loss | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 0 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 0 | 0 | |
| Commercial Portfolio Segment | Business banking | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 157,387 | 173,957 | |
| Fiscal year before current fiscal year | 158,492 | 142,211 | |
| Two years before current fiscal year | 123,602 | 182,203 | |
| Three years before current fiscal year | 156,777 | 211,691 | |
| Four years before current fiscal year | 189,388 | 157,882 | |
| Prior | 686,718 | 457,503 | |
| Revolving Loans | 114,793 | 103,439 | |
| Revolving Loans Converted to Term Loans | 6,537 | 6,317 | |
| Total | 1,593,694 | 1,435,203 | |
| Current period gross charge-offs | |||
| 2025 | 87 | ||
| 2024 | 76 | ||
| 2023 | 365 | ||
| 2022 | 900 | ||
| 2021 | 13 | ||
| Prior | 827 | ||
| Revolving Loans | 0 | ||
| Revolving Loans Converted to Term Loans | 702 | ||
| Total | 2,970 | 2,498 | 4,645 |
| Commercial Portfolio Segment | Business banking | Pass | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 155,862 | 173,110 | |
| Fiscal year before current fiscal year | 150,079 | 141,000 | |
| Two years before current fiscal year | 118,407 | 178,696 | |
| Three years before current fiscal year | 152,857 | 208,835 | |
| Four years before current fiscal year | 183,299 | 156,366 | |
| Prior | 678,747 | 441,532 | |
| Revolving Loans | 114,235 | 103,222 | |
| Revolving Loans Converted to Term Loans | 5,762 | 5,040 | |
| Total | 1,559,248 | 1,407,801 | |
| Commercial Portfolio Segment | Business banking | Special Mention | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 533 | |
| Fiscal year before current fiscal year | 5,505 | 60 | |
| Two years before current fiscal year | 1,444 | 1,409 | |
| Three years before current fiscal year | 820 | 1,929 | |
| Four years before current fiscal year | 4,453 | 0 | |
| Prior | 3,298 | 6,203 | |
| Revolving Loans | 165 | 20 | |
| Revolving Loans Converted to Term Loans | 264 | 262 | |
| Total | 15,949 | 10,416 | |
| Commercial Portfolio Segment | Business banking | Substandard | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 1,525 | 314 | |
| Fiscal year before current fiscal year | 2,908 | 1,102 | |
| Two years before current fiscal year | 3,353 | 1,000 | |
| Three years before current fiscal year | 2,748 | 911 | |
| Four years before current fiscal year | 1,612 | 1,516 | |
| Prior | 4,652 | 9,402 | |
| Revolving Loans | 197 | 197 | |
| Revolving Loans Converted to Term Loans | 493 | 297 | |
| Total | 17,488 | 14,739 | |
| Commercial Portfolio Segment | Business banking | Doubtful | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 49 | |
| Two years before current fiscal year | 398 | 1,098 | |
| Three years before current fiscal year | 352 | 16 | |
| Four years before current fiscal year | 24 | 0 | |
| Prior | 21 | 366 | |
| Revolving Loans | 196 | 0 | |
| Revolving Loans Converted to Term Loans | 18 | 718 | |
| Total | 1,009 | 2,247 | |
| Commercial Portfolio Segment | Business banking | Loss | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 0 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 0 | 0 | |
| Residential Portfolio Segment | Residential real estate | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 319,611 | 215,072 | |
| Fiscal year before current fiscal year | 173,793 | 323,500 | |
| Two years before current fiscal year | 287,862 | 981,032 | |
| Three years before current fiscal year | 913,683 | 1,038,826 | |
| Four years before current fiscal year | 977,449 | 552,771 | |
| Prior | 2,559,782 | 817,181 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 5,232,180 | 3,928,382 | |
| Current period gross charge-offs | |||
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| Prior | 105 | ||
| Revolving Loans | 0 | ||
| Revolving Loans Converted to Term Loans | 0 | ||
| Total | 105 | 28 | 0 |
| Residential Portfolio Segment | Residential real estate | Current and accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 318,744 | 213,244 | |
| Fiscal year before current fiscal year | 172,248 | 321,097 | |
| Two years before current fiscal year | 285,881 | 970,831 | |
| Three years before current fiscal year | 903,422 | 1,032,297 | |
| Four years before current fiscal year | 970,914 | 548,987 | |
| Prior | 2,526,376 | 800,995 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 5,177,585 | 3,887,451 | |
| Residential Portfolio Segment | Residential real estate | 30-89 days past due and accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 683 | 944 | |
| Fiscal year before current fiscal year | 1,545 | 2,300 | |
| Two years before current fiscal year | 1,525 | 6,480 | |
| Three years before current fiscal year | 5,277 | 5,437 | |
| Four years before current fiscal year | 4,587 | 3,209 | |
| Prior | 21,759 | 9,606 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 35,376 | 27,976 | |
| Residential Portfolio Segment | Residential real estate | Loans 90 days or more past due and still accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 0 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 0 | 0 | |
| Residential Portfolio Segment | Residential real estate | Non-accrual | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 184 | 884 | |
| Fiscal year before current fiscal year | 0 | 103 | |
| Two years before current fiscal year | 456 | 3,721 | |
| Three years before current fiscal year | 4,984 | 1,092 | |
| Four years before current fiscal year | 1,948 | 575 | |
| Prior | 11,647 | 6,580 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 19,219 | 12,955 | |
| Consumer Portfolio Segment | Consumer home equity | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 5,351 | 10,425 | |
| Fiscal year before current fiscal year | 10,894 | 32,911 | |
| Two years before current fiscal year | 24,969 | 74,549 | |
| Three years before current fiscal year | 62,438 | 7,954 | |
| Four years before current fiscal year | 6,374 | 4,293 | |
| Prior | 277,253 | 79,355 | |
| Revolving Loans | 1,345,018 | 1,158,883 | |
| Revolving Loans Converted to Term Loans | 21,313 | 16,918 | |
| Total | 1,753,610 | 1,385,288 | |
| Current period gross charge-offs | |||
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| Prior | 35 | ||
| Revolving Loans | 89 | ||
| Revolving Loans Converted to Term Loans | 0 | ||
| Total | 124 | 59 | 7 |
| Consumer Portfolio Segment | Consumer home equity | Current and accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 5,351 | 10,425 | |
| Fiscal year before current fiscal year | 10,836 | 32,573 | |
| Two years before current fiscal year | 24,830 | 74,385 | |
| Three years before current fiscal year | 62,321 | 7,954 | |
| Four years before current fiscal year | 6,374 | 4,293 | |
| Prior | 273,840 | 76,953 | |
| Revolving Loans | 1,332,194 | 1,143,767 | |
| Revolving Loans Converted to Term Loans | 20,341 | 15,629 | |
| Total | 1,736,087 | 1,365,979 | |
| Consumer Portfolio Segment | Consumer home equity | 30-89 days past due and accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 58 | 275 | |
| Two years before current fiscal year | 44 | 103 | |
| Three years before current fiscal year | 117 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 2,287 | 1,179 | |
| Revolving Loans | 8,269 | 6,965 | |
| Revolving Loans Converted to Term Loans | 655 | 574 | |
| Total | 11,430 | 9,096 | |
| Consumer Portfolio Segment | Consumer home equity | Loans 90 days or more past due and still accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 0 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 0 | 0 | |
| Consumer Portfolio Segment | Consumer home equity | Non-accrual | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 63 | |
| Two years before current fiscal year | 95 | 61 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 1,126 | 1,223 | |
| Revolving Loans | 4,555 | 8,151 | |
| Revolving Loans Converted to Term Loans | 317 | 715 | |
| Total | 6,093 | 10,213 | |
| Consumer Portfolio Segment | Other Consumer | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 42,414 | 61,546 | |
| Fiscal year before current fiscal year | 43,215 | 62,327 | |
| Two years before current fiscal year | 47,695 | 27,043 | |
| Three years before current fiscal year | 19,140 | 17,062 | |
| Four years before current fiscal year | 11,029 | 8,485 | |
| Prior | 25,236 | 17,564 | |
| Revolving Loans | 42,896 | 33,093 | |
| Revolving Loans Converted to Term Loans | 408 | 59 | |
| Total | 232,033 | 227,179 | |
| Current period gross charge-offs | |||
| 2025 | 1,230 | ||
| 2024 | 202 | ||
| 2023 | 205 | ||
| 2022 | 200 | ||
| 2021 | 128 | ||
| Prior | 122 | ||
| Revolving Loans | 146 | ||
| Revolving Loans Converted to Term Loans | 0 | ||
| Total | 2,233 | 2,576 | $ 2,419 |
| Consumer Portfolio Segment | Other Consumer | Current and accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 42,364 | 61,430 | |
| Fiscal year before current fiscal year | 43,128 | 62,170 | |
| Two years before current fiscal year | 47,634 | 26,869 | |
| Three years before current fiscal year | 19,063 | 16,970 | |
| Four years before current fiscal year | 11,003 | 8,453 | |
| Prior | 25,128 | 16,914 | |
| Revolving Loans | 42,750 | 32,914 | |
| Revolving Loans Converted to Term Loans | 117 | 19 | |
| Total | 231,187 | 225,739 | |
| Consumer Portfolio Segment | Other Consumer | 30-89 days past due and accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 2 | 116 | |
| Fiscal year before current fiscal year | 83 | 146 | |
| Two years before current fiscal year | 48 | 143 | |
| Three years before current fiscal year | 48 | 75 | |
| Four years before current fiscal year | 26 | 25 | |
| Prior | 95 | 646 | |
| Revolving Loans | 62 | 135 | |
| Revolving Loans Converted to Term Loans | 30 | 15 | |
| Total | 394 | 1,301 | |
| Consumer Portfolio Segment | Other Consumer | Loans 90 days or more past due and still accruing | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 0 | 0 | |
| Fiscal year before current fiscal year | 0 | 0 | |
| Two years before current fiscal year | 0 | 0 | |
| Three years before current fiscal year | 0 | 0 | |
| Four years before current fiscal year | 0 | 0 | |
| Prior | 0 | 0 | |
| Revolving Loans | 0 | 0 | |
| Revolving Loans Converted to Term Loans | 0 | 0 | |
| Total | 0 | 0 | |
| Consumer Portfolio Segment | Other Consumer | Non-accrual | |||
| Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract] | |||
| Current fiscal year | 48 | 0 | |
| Fiscal year before current fiscal year | 4 | 11 | |
| Two years before current fiscal year | 13 | 31 | |
| Three years before current fiscal year | 29 | 17 | |
| Four years before current fiscal year | 0 | 7 | |
| Prior | 13 | 4 | |
| Revolving Loans | 84 | 44 | |
| Revolving Loans Converted to Term Loans | 261 | 25 | |
| Total | $ 452 | $ 139 | |
Loans and Allowance for Credit Losses - Schedule of Shows the Age Analysis of Past Due Loans (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Financing Receivable, Past Due [Line Items] | ||
| Total | $ 23,085,065 | $ 17,778,354 |
| Total Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 130,116 | 110,000 |
| 30-59 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 64,739 | 60,210 |
| 60-89 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 17,304 | 17,350 |
| 90 or More Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 48,073 | 32,440 |
| Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 22,954,949 | 17,668,354 |
| Commercial Portfolio Segment | Commercial and industrial | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 4,295,702 | 3,266,575 |
| Commercial Portfolio Segment | Commercial and industrial | Total Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 7,123 | 118 |
| Commercial Portfolio Segment | Commercial and industrial | 30-59 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 5,368 | 28 |
| Commercial Portfolio Segment | Commercial and industrial | 60-89 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 164 | 0 |
| Commercial Portfolio Segment | Commercial and industrial | 90 or More Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 1,591 | 90 |
| Commercial Portfolio Segment | Commercial and industrial | Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 4,288,579 | 3,266,457 |
| Commercial Portfolio Segment | Commercial real estate | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 9,414,361 | 7,044,078 |
| Commercial Portfolio Segment | Commercial real estate | Total Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 21,160 | 32,693 |
| Commercial Portfolio Segment | Commercial real estate | 30-59 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 5,992 | 17,081 |
| Commercial Portfolio Segment | Commercial real estate | 60-89 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 994 | 6,432 |
| Commercial Portfolio Segment | Commercial real estate | 90 or More Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 14,174 | 9,180 |
| Commercial Portfolio Segment | Commercial real estate | Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 9,393,201 | 7,011,385 |
| Commercial Portfolio Segment | Commercial construction | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 563,485 | 491,649 |
| Commercial Portfolio Segment | Commercial construction | Total Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 1,033 | 0 |
| Commercial Portfolio Segment | Commercial construction | 30-59 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 0 | 0 |
| Commercial Portfolio Segment | Commercial construction | 60-89 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 0 | 0 |
| Commercial Portfolio Segment | Commercial construction | 90 or More Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 1,033 | 0 |
| Commercial Portfolio Segment | Commercial construction | Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 562,452 | 491,649 |
| Commercial Portfolio Segment | Business banking | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 1,593,694 | 1,435,203 |
| Commercial Portfolio Segment | Business banking | Total Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 29,197 | 17,111 |
| Commercial Portfolio Segment | Business banking | 30-59 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 16,673 | 13,680 |
| Commercial Portfolio Segment | Business banking | 60-89 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 3,530 | 1,605 |
| Commercial Portfolio Segment | Business banking | 90 or More Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 8,994 | 1,826 |
| Commercial Portfolio Segment | Business banking | Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 1,564,497 | 1,418,092 |
| Residential Portfolio Segment | Residential real estate | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 5,232,180 | 3,928,382 |
| Residential Portfolio Segment | Residential real estate | Total Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 53,397 | 40,770 |
| Residential Portfolio Segment | Residential real estate | 30-59 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 26,493 | 21,037 |
| Residential Portfolio Segment | Residential real estate | 60-89 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 10,361 | 6,947 |
| Residential Portfolio Segment | Residential real estate | 90 or More Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 16,543 | 12,786 |
| Residential Portfolio Segment | Residential real estate | Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 5,178,783 | 3,887,612 |
| Consumer Portfolio Segment | Consumer home equity | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 1,753,610 | 1,385,288 |
| Consumer Portfolio Segment | Consumer home equity | Total Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 17,391 | 17,898 |
| Consumer Portfolio Segment | Consumer home equity | 30-59 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 9,929 | 7,254 |
| Consumer Portfolio Segment | Consumer home equity | 60-89 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 2,141 | 2,195 |
| Consumer Portfolio Segment | Consumer home equity | 90 or More Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 5,321 | 8,449 |
| Consumer Portfolio Segment | Consumer home equity | Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 1,736,219 | 1,367,390 |
| Consumer Portfolio Segment | Other Consumer | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 232,033 | 227,179 |
| Consumer Portfolio Segment | Other Consumer | Total Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 815 | 1,410 |
| Consumer Portfolio Segment | Other Consumer | 30-59 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 284 | 1,130 |
| Consumer Portfolio Segment | Other Consumer | 60-89 Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 114 | 171 |
| Consumer Portfolio Segment | Other Consumer | 90 or More Days Past Due | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | 417 | 109 |
| Consumer Portfolio Segment | Other Consumer | Current | ||
| Financing Receivable, Past Due [Line Items] | ||
| Total | $ 231,218 | $ 225,769 |
Loans and Allowance for Credit Losses - Schedule of Non-Accrual Loans (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Financing Receivable, Past Due [Line Items] | ||
| Non-Accrual Loans With ACL | $ 133,303 | $ 123,256 |
| Non-Accrual Loans Without ACL | 39,036 | 12,564 |
| Total Non-Accrual Loans | 172,339 | 135,820 |
| Commercial Portfolio Segment | Commercial and industrial | ||
| Financing Receivable, Past Due [Line Items] | ||
| Non-Accrual Loans With ACL | 8,810 | 5,395 |
| Non-Accrual Loans Without ACL | 3,284 | 8 |
| Total Non-Accrual Loans | 12,094 | 5,403 |
| Commercial Portfolio Segment | Commercial real estate | ||
| Financing Receivable, Past Due [Line Items] | ||
| Non-Accrual Loans With ACL | 70,010 | 90,003 |
| Non-Accrual Loans Without ACL | 35,402 | 12,555 |
| Total Non-Accrual Loans | 105,412 | 102,558 |
| Commercial Portfolio Segment | Commercial construction | ||
| Financing Receivable, Past Due [Line Items] | ||
| Non-Accrual Loans With ACL | 17,400 | 0 |
| Non-Accrual Loans Without ACL | 0 | 0 |
| Total Non-Accrual Loans | 17,400 | 0 |
| Commercial Portfolio Segment | Business banking | ||
| Financing Receivable, Past Due [Line Items] | ||
| Non-Accrual Loans With ACL | 11,319 | 4,551 |
| Non-Accrual Loans Without ACL | 350 | 1 |
| Total Non-Accrual Loans | 11,669 | 4,552 |
| Residential Portfolio Segment | Residential real estate | ||
| Financing Receivable, Past Due [Line Items] | ||
| Non-Accrual Loans With ACL | 19,219 | 12,955 |
| Non-Accrual Loans Without ACL | 0 | 0 |
| Total Non-Accrual Loans | 19,219 | 12,955 |
| Consumer Portfolio Segment | Consumer home equity | ||
| Financing Receivable, Past Due [Line Items] | ||
| Non-Accrual Loans With ACL | 6,093 | 10,213 |
| Non-Accrual Loans Without ACL | 0 | 0 |
| Total Non-Accrual Loans | 6,093 | 10,213 |
| Consumer Portfolio Segment | Other Consumer | ||
| Financing Receivable, Past Due [Line Items] | ||
| Non-Accrual Loans With ACL | 452 | 139 |
| Non-Accrual Loans Without ACL | 0 | 0 |
| Total Non-Accrual Loans | $ 452 | $ 139 |
Loans and Allowance for Credit Losses - Schedule of Loan Modifications to Borrowers Experiencing Financial Difficulty (Details) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2025
USD ($)
payment
|
Dec. 31, 2024
USD ($)
payment
|
Dec. 31, 2023
USD ($)
payment
|
|
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 67,135 | $ 30,702 | $ 19,363 |
| % of Total Portfolio | 0.29% | 0.17% | 0.14% |
| Total Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 2,127 | $ 734 | $ 1,044 |
| 30-59 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 614 | 121 | 417 |
| 60-89 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 642 | 223 | 227 |
| 90 or More Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 871 | 390 | 400 |
| Current | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 65,008 | 29,968 | 18,319 |
| Interest Rate Reduction | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 6,760 | $ 1,259 | $ 2,227 |
| % of Total Portfolio | 0.03% | 0.01% | 0.02% |
| Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 3,631 | $ 14,404 | $ 4,308 |
| % of Total Portfolio | 0.02% | 0.08% | 0.03% |
| Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 46,999 | $ 7,804 | $ 274 |
| % of Total Portfolio | 0.20% | 0.04% | 0.00% |
| Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 387 | $ 11,304 |
| % of Total Portfolio | 0.00% | 0.00% | 0.08% |
| Combination - Interest Rate Reduction & Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 49 | $ 116 | $ 774 |
| % of Total Portfolio | 0.00% | 0.00% | 0.01% |
| Combination - Term Extension & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 9,696 | $ 6,692 | $ 164 |
| % of Total Portfolio | 0.04% | 0.04% | 0.00% |
| Combination - Interest Rate Reduction, Term Extension & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 40 | $ 312 |
| % of Total Portfolio | 0.00% | 0.00% | 0.00% |
| Commercial Portfolio Segment | Commercial and industrial | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 1,000 | $ 0 | $ 0 |
| % of Total Portfolio | 0.02% | 0.00% | 0.00% |
| Term Extension | 4 months | ||
| Commercial Portfolio Segment | Commercial and industrial | Total Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | ||
| Commercial Portfolio Segment | Commercial and industrial | 30-59 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 0 | ||
| Commercial Portfolio Segment | Commercial and industrial | 60-89 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 0 | ||
| Commercial Portfolio Segment | Commercial and industrial | 90 or More Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 0 | ||
| Commercial Portfolio Segment | Commercial and industrial | Current | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 1,000 | ||
| Commercial Portfolio Segment | Commercial and industrial | Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 1,000 | $ 0 | $ 0 |
| % of Total Portfolio | 0.02% | 0.00% | 0.00% |
| Commercial Portfolio Segment | Commercial real estate | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 59,807 | $ 25,740 | $ 10,615 |
| % of Total Portfolio | 0.64% | 0.37% | 0.19% |
| Other-than-Insignificant Delay in Repayment | payment | 12 | 6 | |
| Term Extension | 1 year 4 months 24 days | 2 years 3 months 18 days | |
| Interest-only period | 9 months | ||
| Commercial Portfolio Segment | Commercial real estate | Total Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 0 | $ 0 |
| Commercial Portfolio Segment | Commercial real estate | 30-59 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 0 | 0 | 0 |
| Commercial Portfolio Segment | Commercial real estate | 60-89 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 0 | 0 | 0 |
| Commercial Portfolio Segment | Commercial real estate | 90 or More Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 0 | 0 | 0 |
| Commercial Portfolio Segment | Commercial real estate | Current | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 59,807 | 25,740 | $ 10,615 |
| Commercial Portfolio Segment | Commercial real estate | Maximum | |||
| Financing Receivable, Modified [Line Items] | |||
| Interest Rate Reduction | 6.70% | 7.40% | |
| Commercial Portfolio Segment | Commercial real estate | Minimum | |||
| Financing Receivable, Modified [Line Items] | |||
| Interest Rate Reduction | 4.60% | 3.40% | |
| Commercial Portfolio Segment | Commercial real estate | Interest Rate Reduction | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 5,951 | $ 0 | $ 0 |
| % of Total Portfolio | 0.06% | 0.00% | 0.00% |
| Commercial Portfolio Segment | Commercial real estate | Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 11,453 | $ 0 |
| % of Total Portfolio | 0.00% | 0.16% | 0.00% |
| Commercial Portfolio Segment | Commercial real estate | Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 44,790 | $ 7,595 | $ 0 |
| % of Total Portfolio | 0.48% | 0.11% | 0.00% |
| Commercial Portfolio Segment | Commercial real estate | Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 0 | $ 10,615 |
| % of Total Portfolio | 0.00% | 0.00% | 0.19% |
| Commercial Portfolio Segment | Commercial real estate | Combination - Term Extension & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 9,066 | $ 6,692 | $ 0 |
| % of Total Portfolio | 0.10% | 0.10% | 0.00% |
| Commercial Portfolio Segment | Business banking | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 4,209 | $ 803 | $ 1,188 |
| % of Total Portfolio | 0.26% | 0.06% | 0.11% |
| Other-than-Insignificant Delay in Repayment | payment | 7 | 6 | 4 |
| Term Extension | 6 months | 2 years 3 months 18 days | 4 years 3 months 18 days |
| Commercial Portfolio Segment | Business banking | Total Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 986 | $ 0 | $ 0 |
| Commercial Portfolio Segment | Business banking | 30-59 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 99 | 0 | 0 |
| Commercial Portfolio Segment | Business banking | 60-89 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 348 | 0 | 0 |
| Commercial Portfolio Segment | Business banking | 90 or More Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 539 | 0 | 0 |
| Commercial Portfolio Segment | Business banking | Current | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 3,223 | $ 803 | $ 1,188 |
| Commercial Portfolio Segment | Business banking | Maximum | |||
| Financing Receivable, Modified [Line Items] | |||
| Interest Rate Reduction | 10.60% | 9.50% | 9.80% |
| Commercial Portfolio Segment | Business banking | Minimum | |||
| Financing Receivable, Modified [Line Items] | |||
| Interest Rate Reduction | 7.40% | 5.20% | 7.60% |
| Commercial Portfolio Segment | Business banking | Interest Rate Reduction | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 423 | $ 390 | $ 43 |
| % of Total Portfolio | 0.03% | 0.03% | 0.00% |
| Commercial Portfolio Segment | Business banking | Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 1,898 | $ 244 | $ 20 |
| % of Total Portfolio | 0.12% | 0.02% | 0.00% |
| Commercial Portfolio Segment | Business banking | Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 1,209 | $ 18 | $ 274 |
| % of Total Portfolio | 0.08% | 0.00% | 0.03% |
| Commercial Portfolio Segment | Business banking | Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 0 | $ 86 |
| % of Total Portfolio | 0.00% | 0.00% | 0.01% |
| Commercial Portfolio Segment | Business banking | Combination - Interest Rate Reduction & Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 49 | $ 116 | $ 561 |
| % of Total Portfolio | 0.00% | 0.01% | 0.05% |
| Commercial Portfolio Segment | Business banking | Combination - Term Extension & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 630 | $ 0 | $ 24 |
| % of Total Portfolio | 0.04% | 0.00% | 0.00% |
| Commercial Portfolio Segment | Business banking | Combination - Interest Rate Reduction, Term Extension & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 35 | $ 180 |
| % of Total Portfolio | 0.00% | 0.00% | 0.02% |
| Residential Portfolio Segment | Residential real estate | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 1,404 | $ 1,509 | $ 3,806 |
| % of Total Portfolio | 0.03% | 0.04% | 0.15% |
| Other-than-Insignificant Delay in Repayment | payment | 7 | 6 | 7 |
| Term Extension | 2 years | 23 years 8 months 12 days | |
| Residential Portfolio Segment | Residential real estate | Total Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 692 | $ 116 | $ 593 |
| Residential Portfolio Segment | Residential real estate | 30-59 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 360 | 116 | 366 |
| Residential Portfolio Segment | Residential real estate | 60-89 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 0 | 0 | 227 |
| Residential Portfolio Segment | Residential real estate | 90 or More Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 332 | 0 | 0 |
| Residential Portfolio Segment | Residential real estate | Current | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 712 | 1,393 | $ 3,213 |
| Residential Portfolio Segment | Residential real estate | Maximum | |||
| Financing Receivable, Modified [Line Items] | |||
| Interest Rate Reduction | 7.30% | 5.40% | |
| Residential Portfolio Segment | Residential real estate | Minimum | |||
| Financing Receivable, Modified [Line Items] | |||
| Interest Rate Reduction | 4.50% | 3.60% | |
| Residential Portfolio Segment | Residential real estate | Interest Rate Reduction | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 120 | $ 0 | $ 301 |
| % of Total Portfolio | 0.00% | 0.00% | 0.01% |
| Residential Portfolio Segment | Residential real estate | Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 1,284 | $ 1,320 | $ 3,284 |
| % of Total Portfolio | 0.02% | 0.03% | 0.13% |
| Residential Portfolio Segment | Residential real estate | Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 189 | $ 0 |
| % of Total Portfolio | 0.00% | 0.00% | 0.00% |
| Residential Portfolio Segment | Residential real estate | Combination - Term Extension & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 0 | $ 140 |
| % of Total Portfolio | 0.00% | 0.00% | 0.01% |
| Residential Portfolio Segment | Residential real estate | Combination - Interest Rate Reduction, Term Extension & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 0 | $ 81 |
| % of Total Portfolio | 0.00% | 0.00% | 0.00% |
| Consumer Portfolio Segment | Consumer home equity | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 715 | $ 2,650 | $ 3,754 |
| % of Total Portfolio | 0.04% | 0.19% | 0.31% |
| Other-than-Insignificant Delay in Repayment | payment | 4 | 11 | 8 |
| Term Extension | 7 years 4 months 24 days | 16 years 9 months 18 days | |
| Consumer Portfolio Segment | Consumer home equity | Total Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 449 | $ 618 | $ 451 |
| Consumer Portfolio Segment | Consumer home equity | 30-59 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 155 | 5 | 51 |
| Consumer Portfolio Segment | Consumer home equity | 60-89 Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 294 | 223 | 0 |
| Consumer Portfolio Segment | Consumer home equity | 90 or More Days Past Due | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | 0 | 390 | 400 |
| Consumer Portfolio Segment | Consumer home equity | Current | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 266 | $ 2,032 | $ 3,303 |
| Consumer Portfolio Segment | Consumer home equity | Maximum | |||
| Financing Receivable, Modified [Line Items] | |||
| Interest Rate Reduction | 7.00% | 8.10% | 7.50% |
| Consumer Portfolio Segment | Consumer home equity | Minimum | |||
| Financing Receivable, Modified [Line Items] | |||
| Interest Rate Reduction | 4.50% | 4.70% | 4.50% |
| Consumer Portfolio Segment | Consumer home equity | Interest Rate Reduction | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 266 | $ 869 | $ 1,883 |
| % of Total Portfolio | 0.02% | 0.06% | 0.16% |
| Consumer Portfolio Segment | Consumer home equity | Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 449 | $ 1,387 | $ 1,004 |
| % of Total Portfolio | 0.03% | 0.10% | 0.08% |
| Consumer Portfolio Segment | Consumer home equity | Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 2 | $ 0 |
| % of Total Portfolio | 0.00% | 0.00% | 0.00% |
| Consumer Portfolio Segment | Consumer home equity | Combination - Interest Rate Reduction & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 387 | $ 603 |
| % of Total Portfolio | 0.00% | 0.03% | 0.05% |
| Consumer Portfolio Segment | Consumer home equity | Combination - Interest Rate Reduction & Term Extension | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 0 | $ 213 |
| % of Total Portfolio | 0.00% | 0.00% | 0.02% |
| Consumer Portfolio Segment | Consumer home equity | Combination - Interest Rate Reduction, Term Extension & Other-than-Insignificant Delay in Repayment | |||
| Financing Receivable, Modified [Line Items] | |||
| Amortized Cost Balance | $ 0 | $ 5 | $ 51 |
| % of Total Portfolio | 0.00% | 0.00% | 0.00% |
Loans and Allowance for Credit Losses - Schedule of Participating Mortgage Loans (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Balance | $ 3,306,370 | $ 2,136,457 |
| Non-performing Loan Rate (%) | 1.68% | 1.71% |
| Gross Charge-offs | $ 10,301 | $ 10,290 |
| Commercial Portfolio Segment | Commercial and industrial | ||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Balance | $ 1,504,012 | $ 1,031,237 |
| Non-performing Loan Rate (%) | 0.64% | 0.00% |
| Gross Charge-offs | $ 5,004 | $ 0 |
| Commercial Portfolio Segment | Commercial real estate | ||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Balance | $ 1,611,130 | $ 944,371 |
| Non-performing Loan Rate (%) | 1.84% | 3.87% |
| Gross Charge-offs | $ 5,282 | $ 10,290 |
| Commercial Portfolio Segment | Commercial construction | ||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Balance | $ 190,156 | $ 159,237 |
| Non-performing Loan Rate (%) | 8.61% | 0.00% |
| Gross Charge-offs | $ 0 | $ 0 |
| Commercial Portfolio Segment | Business banking | ||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Balance | $ 1,072 | $ 1,612 |
| Non-performing Loan Rate (%) | 0.00% | 0.00% |
| Gross Charge-offs | $ 15 | $ 0 |
Premises and Equipment - Schedule of Premises and Equipment (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Total cost | $ 226,500 | $ 152,369 |
| Accumulated depreciation | (108,278) | (87,816) |
| Premises and equipment used in operations, net | 118,222 | 64,553 |
| Premises and equipment held for sale | 1,762 | 2,088 |
| Premises and equipment held for sale | 119,984 | 66,641 |
| Land | ||
| Property, Plant and Equipment [Line Items] | ||
| Total cost | 29,214 | 13,133 |
| Buildings | ||
| Property, Plant and Equipment [Line Items] | ||
| Total cost | $ 92,192 | 52,205 |
| Buildings | Minimum | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated Useful Life | 5 years | |
| Buildings | Maximum | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated Useful Life | 30 years | |
| Equipment | ||
| Property, Plant and Equipment [Line Items] | ||
| Total cost | $ 51,541 | 42,769 |
| Equipment | Minimum | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated Useful Life | 3 years | |
| Equipment | Maximum | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated Useful Life | 5 years | |
| Leasehold improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Total cost | $ 53,553 | $ 44,262 |
| Leasehold improvements | Minimum | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated Useful Life | 5 years | |
| Leasehold improvements | Maximum | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated Useful Life | 25 years |
Premises and Equipment - Narrative (Details) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2025
USD ($)
property
|
Dec. 31, 2024
USD ($)
property
|
Dec. 31, 2023
USD ($)
property
|
|
| Property, Plant and Equipment [Line Items] | |||
| Depreciation | $ | $ 12,800 | $ 12,500 | $ 10,500 |
| Number of properties transferred to held for sale | 1 | 4 | 0 |
| Aggregate book value of premises held for sale | $ | $ 200 | $ 17,100 | |
| Properties transferred to held for sale, write-down, amount | $ | $ 3,000 | ||
| Number of properties sold | 3 | 0 | |
| Proceeds from sale of bank premises and equipment | $ | $ 0 | $ 15,116 | $ 0 |
| Gain (loss) on disposition of property plant equipment | $ | $ 400 | ||
| Land and Building | |||
| Property, Plant and Equipment [Line Items] | |||
| Number of properties transferred to held for sale | 1 | ||
| Number of properties sold | 1 | ||
| Cambridge Bancorp | |||
| Property, Plant and Equipment [Line Items] | |||
| Number of properties transferred to held for sale | 2 | ||
| Number of properties sold | 2 | ||
Leases - Narrative (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2025
USD ($)
extension
lease
|
Dec. 31, 2024
USD ($)
extension
lease
|
Dec. 31, 2023
USD ($)
|
|
| Disclosure of Leases [Line Items] | |||
| Payment of leases | $ 16.2 | $ 16.3 | $ 13.3 |
| Number of lease extensions not exercised | extension | 3 | 1 | |
| Number of lease extensions exercised | extension | 6 | 11 | |
| Number of leases terminated | lease | 2 | 8 | |
| Net increase in operating lease right of use assets and operating lease liabilities relating to lease remeasurements | $ 2.4 | $ 5.5 | |
| Impairment charge | $ 3.5 | $ 4.7 | |
| Number of leases impaired | lease | 1 | ||
| Minimum | |||
| Disclosure of Leases [Line Items] | |||
| Operating lease remaining lease term | 1 year | ||
| Maximum | |||
| Disclosure of Leases [Line Items] | |||
| Operating lease remaining lease term | 24 years | ||
Leases - Summary of Information Relating to Operating Leases (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Leases [Abstract] | ||
| Right-of-use assets | $ 74,094 | $ 68,393 |
| Lease liabilities | $ 97,896 | $ 81,901 |
| Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets |
| Operating Lease, Liability, Statement of Financial Position [Extensible List] | Other liabilities | Other liabilities |
Leases - Summary of Net Lease Cost (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Leases [Abstract] | |||
| Operating lease cost | $ 19,831 | $ 13,295 | $ 12,439 |
| Finance lease cost | 474 | 468 | 338 |
| Variable lease cost | 3,156 | 3,017 | 2,766 |
| Total lease cost | $ 23,461 | $ 16,780 | $ 15,543 |
Leases - Schedule of Supplemental Balance Sheet Information Related to Operating Leases (Details) |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Leases [Abstract] | ||
| Weighted-average remaining lease term (in years) | 7 years 10 months 6 days | 7 years 6 months 14 days |
| Weighted-average discount rate | 4.35% | 4.08% |
Leases - Schedule of Future Minimum Lease Payments (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Leases [Abstract] | ||
| 2026 | $ 16,876 | |
| 2027 | 16,700 | |
| 2028 | 16,102 | |
| 2029 | 14,034 | |
| 2030 | 12,503 | |
| Thereafter | 41,327 | |
| Total minimum lease payments | 117,542 | |
| Less: amount representing interest | 19,646 | |
| Present value of future minimum lease payments | $ 97,896 | $ 81,901 |
Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Balances not subject to amortization | |||
| Goodwill | $ 1,117,148 | $ 914,957 | $ 557,635 |
| Balances subject to amortization | |||
| Total balances subject to amortization | 183,782 | 135,201 | |
| Total goodwill and other intangible assets | 1,300,930 | 1,050,158 | |
| Core deposit intangibles | |||
| Balances subject to amortization | |||
| Total balances subject to amortization | 164,280 | 111,296 | |
| Customer list intangible | |||
| Balances subject to amortization | |||
| Total balances subject to amortization | 18,711 | 22,841 | |
| Trade name intangible | |||
| Balances subject to amortization | |||
| Total balances subject to amortization | $ 791 | $ 1,064 |
Goodwill and Other Intangible Assets - Schedule of Goodwill Carrying Value (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Goodwill [Roll Forward] | ||
| Balance at beginning of year | $ 914,957 | $ 557,635 |
| Goodwill recorded during the year | 202,191 | 357,322 |
| Balance at end of year | $ 1,117,148 | $ 914,957 |
Goodwill and Other Intangible Assets - Schedule of Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | $ 235,593 | $ 152,833 |
| Accumulated Amortization | (51,811) | (17,632) |
| Total amortization expense | 183,782 | 135,201 |
| Core deposit intangibles | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 209,393 | 126,633 |
| Accumulated Amortization | (45,113) | (15,337) |
| Total amortization expense | 164,280 | 111,296 |
| Customer list intangible | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 25,000 | 25,000 |
| Accumulated Amortization | (6,289) | (2,159) |
| Total amortization expense | 18,711 | 22,841 |
| Trade name intangible | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Carrying Amount | 1,200 | 1,200 |
| Accumulated Amortization | (409) | (136) |
| Total amortization expense | $ 791 | $ 1,064 |
Goodwill and Other Intangible Assets - Narrative (Details) |
12 Months Ended | |||
|---|---|---|---|---|
|
Nov. 30, 2025
USD ($)
|
Dec. 31, 2025
USD ($)
reporting_unit
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||||
| Number of reporting units | reporting_unit | 1 | |||
| Goodwill impairment | $ 0 | |||
| Amortization of intangible assets | $ 34,179,000 | $ 14,569,000 | $ 1,804,000 | |
| Weighted average useful life | 7 years 6 months | |||
| Remaining useful life of intangible | 6 years 4 months 24 days | |||
Goodwill and Other Intangible Assets - Schedule of Amortization Expense (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Goodwill and Intangible Assets Disclosure [Abstract] | ||
| 2026 | $ 46,614 | |
| 2027 | 36,855 | |
| 2028 | 31,186 | |
| 2029 | 24,953 | |
| 2030 | 21,251 | |
| Thereafter | 22,923 | |
| Total amortization expense | $ 183,782 | $ 135,201 |
Deposits - Schedule of the Company’s Deposits (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Banking and Thrift, Interest [Abstract] | ||
| Demand | $ 6,341,205 | $ 5,992,082 |
| Interest checking accounts | 4,727,219 | 4,606,250 |
| Savings accounts | 2,010,028 | 1,648,323 |
| Money market investment | 7,885,707 | 5,736,362 |
| Certificates of deposit | 4,506,592 | 3,336,323 |
| Total deposits | $ 25,470,751 | $ 21,319,340 |
Deposits - Narrative (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Banking and Thrift, Interest [Abstract] | ||
| Bank overdrafts | $ 6.5 | $ 3.2 |
| Time deposits equal to or grater than $250,000 | $ 1,400.0 | $ 1,100.0 |
Deposits - Schedule of the Certificates of Deposits by Maturity (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Balance | ||
| 2026 | $ 4,445,189 | |
| 2027 | 48,861 | |
| 2028 | 5,765 | |
| 2029 | 4,225 | |
| 2030 | 2,530 | |
| Thereafter | 22 | |
| Total certificates of deposit | $ 4,506,592 | $ 3,336,323 |
| Percentage of Total | ||
| 2026 | 98.60% | |
| 2027 | 1.10% | |
| 2028 | 0.10% | |
| 2029 | 0.10% | |
| 2030 | 0.10% | |
| Thereafter | 0.00% | |
| Total certificates of deposit | 100.00% |
Borrowed Funds - Schedule of Borrowed Funds (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Federal Home Loan Banks [Abstract] | ||
| Interest rate swap collateral funds | $ 15,321 | $ 48,590 |
| FHLB advances | 199,617 | 17,589 |
| Total borrowed funds | $ 214,938 | $ 66,179 |
Borrowed Funds - Schedule of Interest Expense on Borrowed Funds (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Federal Home Loan Bank, Advances [Line Items] | |||
| Total interest expense on borrowed funds | $ 3,245 | $ 1,766 | $ 19,969 |
| Federal Home Loan Bank advances | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Total interest expense on borrowed funds | 2,141 | 553 | 19,247 |
| Interest rate swap collateral funds | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Total interest expense on borrowed funds | $ 1,104 | $ 1,213 | $ 722 |
Borrowed Funds - Schedule of FHLB of Boston Advances (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Amount | ||
| Total Federal Home Loan Bank advances | $ 199,617 | $ 17,589 |
| Federal Home Loan Bank of Boston | ||
| Amount | ||
| Within one year | 46,531 | 2,515 |
| Over one year to three years | 128,602 | 2,148 |
| Over three years to five years | 14,242 | 2,833 |
| Over five years | 10,242 | 10,093 |
| Total Federal Home Loan Bank advances | $ 199,617 | $ 17,589 |
| Weighted Average Interest Rate | ||
| Within one year | 4.39% | 0.67% |
| Over one year to three years | 4.03% | 1.82% |
| Over three years to five years | 2.78% | 0.56% |
| Over five years | 1.47% | 1.34% |
| Total Federal Home Loan Bank advances | 3.89% | 1.18% |
Borrowed Funds - Narrative (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Federal Home Loan Bank, Advances [Line Items] | |||
| Federal Home Loan Bank stock, at cost | $ 13,838 | $ 5,865 | |
| Dividends received from investment in FHLB of Boston | 500 | 900 | $ 2,000 |
| Federal Reserve Discount Window | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Carrying value of securities pledged as collateral | 414,200 | 794,800 | |
| Federal Reserve Discount Window | Loans Receivable | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Carrying value of securities pledged as collateral | 3,500,000 | 2,100,000 | |
| Federal Reserve Discount Window | Debt Securities | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Carrying value of securities pledged as collateral | 400,400 | 769,400 | |
| Federal Home Loan Bank of Boston | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Federal Home Loan Bank stock, at cost | 13,800 | 5,900 | |
| Carrying value of securities pledged as collateral | 200,000 | 1,000,000 | |
| Federal Home Loan Bank of Boston | Federal Home Loan Bank Advances | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Federal Home Loan Bank, available and unused borrowing capacity | 3,000,000 | 2,400,000 | |
| Federal Home Loan Bank of Boston | Federal Home Loan Bank Advances | Residential Portfolio Segment | Residential real estate | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Federal Home Loan Bank, advances secured by mortgage-backed securities | 3,100,000 | 1,500,000 | |
| Federal Home Loan Bank of Boston | Federal Home Loan Bank Advances | Commercial Portfolio Segment | Commercial real estate | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Federal Home Loan Bank, advances secured by mortgage-backed securities | 300,000 | ||
| Federal Home Loan Bank of Boston | Federal Home Loan Bank Advances | Collateralized Mortgage-Backed Securities | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Federal Home Loan Bank, advances secured by mortgage-backed securities | 100,000 | 1,000,000 | |
| Federal Reserve Bank Advances | |||
| Federal Home Loan Bank, Advances [Line Items] | |||
| Federal Reserve Discount Window, available and unused borrowing capacity | $ 3,900,000 | $ 2,800,000 | |
Earnings Per Share ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Earnings Per Share [Abstract] | |||
| Net income (loss) from continuing operations | $ 88,219 | $ 119,561 | $ (62,689) |
| Net income from discontinued operations | 0 | 0 | 294,866 |
| Net income | $ 88,219 | $ 119,561 | $ 232,177 |
| Average number of common shares outstanding (in shares) | 215,703,702 | 194,154,984 | 175,814,954 |
| Less: Average unallocated ESOP shares (in shares) | (12,529,051) | (13,028,664) | (13,521,934) |
| Average number of common shares outstanding used to calculate basic earnings per common share (in shares) | 203,174,651 | 181,126,320 | 162,293,020 |
| Common stock equivalents (in shares) | 1,160,999 | 1,054,753 | 110,077 |
| Average number of common shares outstanding used to calculate diluted earnings per common share (in shares) | 204,335,650 | 182,181,073 | 162,403,097 |
| Basic earnings per share | |||
| Basic earnings (loss) per share from continuing operations (in dollars per share) | $ 0.43 | $ 0.66 | $ (0.39) |
| Basic earnings per share from discontinued operations (in dollars per share) | 0 | 0 | 1.82 |
| Basic earnings per share (in dollars per share) | 0.43 | 0.66 | 1.43 |
| Diluted earnings per share | |||
| Diluted earnings (loss) per share from continuing operations (in dollars per share) | 0.43 | 0.66 | (0.39) |
| Diluted earnings per share from discontinued operations (in dollars per share) | 0 | 0 | 1.82 |
| Diluted earnings per share (in dollars per share) | $ 0.43 | $ 0.66 | $ 1.43 |
Low Income Housing Tax Credits and Other Tax Credit Investments - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Investments In Affordable Housing Projects [Line Items] | ||
| Tax credit investments | $ 225.2 | $ 222.7 |
| Renewable Energy Program | ||
| Investments In Affordable Housing Projects [Line Items] | ||
| Equity investments | $ 1.5 | $ 1.9 |
| Low income housing tax credit and other tax credit investments | ||
| Investments In Affordable Housing Projects [Line Items] | ||
| Tax credit period of benefits | 15 years | |
| Operating loss tax benefits period | 15 years | |
Low Income Housing Tax Credits and Other Tax Credit Investments - Schedule of the Company's Investments in Low Income Housing Projects Accounted for Using the Proportional Amortization Method (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Equity Method Investments and Joint Ventures [Abstract] | |||
| Current recorded investment included in other assets | $ 223,698 | $ 220,845 | |
| Commitments to fund qualified affordable housing projects included in recorded investment noted above | 54,263 | 89,801 | |
| Tax credits and other tax benefits recognized | 29,798 | 20,750 | $ 11,624 |
| Amortization expense included in income tax expense | $ 23,746 | $ 16,452 | $ 9,577 |
| Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets | |
| Investment Program Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag | Tax credits and other tax benefits recognized | Tax credits and other tax benefits recognized | Tax credits and other tax benefits recognized |
| Investment Program Proportional Amortization Method Elected Income Tax Credit And Other Income Tax Benefit Before Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag | Tax credits and other tax benefits recognized | Tax credits and other tax benefits recognized | Tax credits and other tax benefits recognized |
| Investment Program, Proportional Amortization Method, Applied, Amortization Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] | Income tax expense (benefit) | Income tax expense (benefit) | Income tax expense (benefit) |
| Investment Program Proportional Amortization Method Applied Income Tax Credit And Other Tax Benefit Amortization Statement Of Cash Flows Extensible Enumeration Not Disclosed Flag | Amortization expense included in income tax expense | Amortization expense included in income tax expense | Amortization expense included in income tax expense |
Income Taxes - Schedule of Components of Income Tax Provisions (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Current tax expense (benefit): | |||
| Federal | $ 25,022 | $ 2,088 | $ (39,710) |
| State | (185) | (1,942) | (5,332) |
| Total current tax expense (benefit) | 24,837 | 146 | (45,042) |
| Deferred tax expense (benefit): | |||
| Federal | (17,709) | 19,204 | 1,219 |
| State | 4,159 | 16,855 | (19,486) |
| Total deferred tax (benefit) expense | (13,550) | 36,059 | (18,267) |
| Total income tax expense (benefit) | $ 11,287 | $ 36,205 | $ (63,309) |
Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Effective Income Tax Rate Reconciliation, Amount [Abstract] | |||
| Income tax expense (benefit) at statutory rate | $ 20,896 | $ 32,711 | $ (26,458) |
| State income tax, net of federal tax benefit | 4,703 | 13,783 | (17,313) |
| Changes in unrecognized tax benefits | (1,564) | (2,002) | (2,293) |
| Changes in valuation allowance | 2,088 | 2,781 | 0 |
| Tax credits | (4,373) | (3,459) | (1,617) |
| Tax-exempt income | (16,260) | (14,911) | (14,161) |
| Other nontaxable or nondeductible items | 5,742 | 5,459 | 3,031 |
| Other, net | 55 | 1,843 | (4,498) |
| Total income tax expense (benefit) | $ 11,287 | $ 36,205 | $ (63,309) |
| Effective Income Tax Rate Reconciliation, Percent [Abstract] | |||
| Income tax expense (benefit) at statutory rate | 21.00% | 21.00% | 21.00% |
| State income tax, net of federal tax benefit | 4.73% | 8.85% | 13.74% |
| Changes in unrecognized tax benefits | (1.57%) | (1.29%) | 1.82% |
| Changes in valuation allowance | 2.10% | 1.79% | 0.00% |
| Tax credits | (4.39%) | (2.22%) | 1.28% |
| Tax-exempt income | (16.34%) | (9.57%) | 11.24% |
| Other nontaxable or nondeductible items | 5.77% | 3.50% | (2.41%) |
| Other, net | 0.06% | 1.18% | 3.57% |
| Actual income tax expense (benefit) | 11.34% | 23.24% | 50.25% |
Income Taxes - Schedule of Components of Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Deferred tax assets: | ||
| Unrealized loss on available for sale securities | $ 79,433 | $ 194,324 |
| Allowance for loan losses | 96,165 | 69,531 |
| Cash flow hedges | 1,359 | 10,347 |
| Leases | 27,317 | 22,946 |
| Charitable contribution limitation carryover | 5,213 | 5,214 |
| Investment losses | 4,740 | 5,843 |
| Accrued expenses | 13,799 | 9,952 |
| Fixed assets | 0 | 659 |
| Loan basis difference fair value adjustments | 126,832 | 75,301 |
| Loss carryovers | 45,315 | 23,844 |
| Tax credits | 34,372 | 276 |
| Other | 1,968 | 1,195 |
| Total deferred tax assets before valuation allowance | 436,513 | 419,432 |
| Valuation allowance | (5,213) | (2,781) |
| Total deferred tax assets net of valuation allowance | 431,300 | 416,651 |
| Deferred tax liabilities: | ||
| Amortization of intangibles | 58,008 | 44,736 |
| Lease obligation | 20,739 | 19,199 |
| Partnerships | 4,366 | 3,417 |
| Trading securities | 6,997 | 5,203 |
| Employee benefits | 16,029 | 11,102 |
| Fixed assets | 1,700 | 0 |
| Mortgage servicing rights | 11,240 | 575 |
| Other | 2,258 | 291 |
| Total deferred tax liabilities | 121,337 | 84,523 |
| Net deferred income tax assets | $ 309,963 | $ 332,128 |
Income Taxes - Narrative (Details) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Income Tax Examination [Line Items] | ||||
| Valuation allowance | $ 5,213,000 | $ 2,781,000 | ||
| Unrecognized tax benefits | 0 | 1,564,000 | $ 3,503,000 | $ 5,782,000 |
| Unrecognized tax benefits, income tax penalties and interest accrued | 0 | 500,000 | ||
| Reductions as a result of a lapse of the applicable statute of limitations | 1,564,000 | 1,939,000 | 2,279,000 | |
| Tax interest and penalties, reduction resulting from lapse of applicable statute of limitations | 200,000 | |||
| Net operating loss carryforwards | 40,800,000 | 23,800,000 | ||
| Federal pre-1988 reserve with no tax provision | 20,800,000 | |||
| Tax credits and other tax benefits recognized | 29,798,000 | 20,750,000 | 11,624,000 | |
| Income taxes paid | (2,514,000) | 18,786,000 | $ 65,921,000 | |
| State | ||||
| Income Tax Examination [Line Items] | ||||
| Unrecognized tax benefits | 1,800,000 | |||
| Release of uncertain tax positions | 1,800,000 | |||
| Reductions as a result of a lapse of the applicable statute of limitations | 1,800,000 | |||
| UNITED STATES | ||||
| Income Tax Examination [Line Items] | ||||
| Tax credits and other tax benefits recognized | $ 23,300,000 | $ 16,500,000 | ||
Income Taxes - Schedule of Unrecognized Tax Benefits Roll Forward (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Unrecognized Tax Benefits [Roll Forward] | |||
| Beginning | $ 1,564,000 | $ 3,503,000 | $ 5,782,000 |
| Additions based on tax positions related to the current year | 0 | 0 | 0 |
| Additions for tax positions of prior years | 0 | 0 | 0 |
| Reductions related to settlements with taxing authorities | 0 | 0 | 0 |
| Reductions as a result of a lapse of the applicable statute of limitations | (1,564,000) | (1,939,000) | (2,279,000) |
| Ending | $ 0 | $ 1,564,000 | $ 3,503,000 |
Income Taxes - Schedule of Income Taxes (Refunded) Paid (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Income Tax Paid, by Individual Jurisdiction [Line Items] | |||
| Federal | $ (2,415) | ||
| Total | (2,514) | $ 18,786 | $ 65,921 |
| Massachusetts | |||
| Income Tax Paid, by Individual Jurisdiction [Line Items] | |||
| State | 125 | ||
| New Hampshire | |||
| Income Tax Paid, by Individual Jurisdiction [Line Items] | |||
| State | (1,080) | ||
| Rhode Island | |||
| Income Tax Paid, by Individual Jurisdiction [Line Items] | |||
| State | 600 | ||
| Other | |||
| Income Tax Paid, by Individual Jurisdiction [Line Items] | |||
| State | $ 256 | ||
Minimum Regulatory Capital Requirements (Details) $ in Thousands |
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
|---|---|---|
| Total regulatory capital (to risk-weighted assets) | ||
| Actual, Amount | $ 3,551,277 | $ 3,363,799 |
| Actual, Ratio | 0.1432 | 0.1678 |
| For Capital Adequacy, Amount | $ 1,983,731 | $ 1,603,864 |
| For Capital Adequacy, Ratio | 0.080 | 0.080 |
| To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount | $ 2,479,663 | $ 2,004,930 |
| To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.100 | 0.100 |
| Common equity Tier 1 capital (to risk-weighted assets) | ||
| Actual, Amount | $ 3,271,487 | $ 3,152,907 |
| Actual, Ratio | 0.1319 | 0.1573 |
| For Capital Adequacy, Amount | $ 1,115,849 | $ 902,174 |
| For Capital Adequacy, Ratio | 0.045 | 0.045 |
| To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,611,781 | $ 1,303,140 |
| To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.065 | 0.065 |
| Tier 1 capital (to risk-weighted assets) | ||
| Actual, Amount | $ 3,271,487 | $ 3,152,907 |
| Actual, Ratio | 0.1319 | 0.1573 |
| For Capital Adequacy, Amount | $ 1,487,798 | $ 1,202,898 |
| For Capital Adequacy, Ratio | 0.060 | 0.060 |
| To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,983,731 | $ 1,603,864 |
| To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.080 | 0.080 |
| Tier 1 capital (to average assets) leverage | ||
| Actual, Amount | $ 3,271,487 | $ 3,152,907 |
| Actual, Ratio | 0.1165 | 0.1243 |
| For Capital Adequacy, Amount | $ 1,123,283 | $ 1,014,319 |
| For Capital Adequacy, Ratio | 0.040 | 0.040 |
| To Be Well-Capitalized Under Prompt Corrective Action Provisions, Amount | $ 1,404,104 | $ 1,267,899 |
| To Be Well-Capitalized Under Prompt Corrective Action Provisions, Ratio | 0.050 | 0.050 |
Employee Benefits - Narrative (Details) |
12 Months Ended | ||||
|---|---|---|---|---|---|
|
Dec. 31, 2025
USD ($)
plan
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
Jul. 12, 2024
USD ($)
|
Dec. 31, 2022
USD ($)
|
|
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Discretionary employer contribution to the defined benefit plan | $ 0 | $ 0 | $ 0 | ||
| Defined benefit plan, expected future employer contributions, current fiscal year | $ 0 | ||||
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Non-operating expenses | Non-operating expenses | Non-operating expenses | ||
| Curtailment | $ 0 | $ 0 | $ 15,908,000 | ||
| Discretionary contributions for the defined contribution plan | 5,600,000 | 4,900,000 | 5,200,000 | ||
| Defined contribution liability | $ 21,300,000 | 23,700,000 | |||
| Number of deferred compensation plans | plan | 4 | ||||
| Deferred compensation plans, liabilities | $ 32,900,000 | 33,300,000 | |||
| Cambridge Bancorp | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Benefit obligation | $ 35,300,000 | ||||
| Asset Management Arrangement | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Benefit obligation | 582,986,000 | 545,222,000 | 468,364,000 | ||
| Actuarial gain (loss) | 69,691,000 | 48,629,000 | |||
| Equity Securities | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Rabbi trust investments | 84,200,000 | 82,300,000 | |||
| Fair value, net asset (liability) | $ 57,100,000 | 54,100,000 | |||
| Defined Benefit Plan, Equity Securities | Minimum | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Plan asset, target allocation percentages | 49.00% | ||||
| Defined Benefit Plan, Equity Securities | Maximum | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Plan asset, target allocation percentages | 63.00% | ||||
| Fixed income | Minimum | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Plan asset, target allocation percentages | 28.00% | ||||
| Fixed income | Maximum | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Plan asset, target allocation percentages | 42.00% | ||||
| Hedge Funds | Minimum | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Plan asset, target allocation percentages | 3.00% | ||||
| Hedge Funds | Maximum | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Plan asset, target allocation percentages | 12.00% | ||||
| Pension Plan | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Benefit obligation | $ 452,553,000 | 434,337,000 | 399,364,000 | $ 362,530,000 | |
| Actuarial gain (loss) | $ (13,095,000) | 15,280,000 | (13,943,000) | ||
| Pension Plan | BEP | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Defined benefit plan, service requirement for full vesting | 3 years | ||||
| Supplemental Employee Retirement Plan | DC SERP | |||||
| Defined Benefit Plan, Plan Assets, Category [Line Items] | |||||
| Defined contribution expense | $ 100,000 | $ 0 | $ 100,000 | ||
Employee Benefits - Schedule of Obligations and Funded Status (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Change in benefit obligation: | |||
| Service cost | $ 22,932 | $ 22,470 | $ 24,474 |
| Interest cost | 22,140 | 19,601 | 17,559 |
| Pension Plan | |||
| Change in benefit obligation: | |||
| Benefit obligation at beginning of the year | 434,337 | 399,364 | 362,530 |
| Service cost | 22,932 | 22,470 | 24,474 |
| Interest cost | 22,140 | 19,601 | 17,559 |
| Amendments | 0 | 0 | 1,351 |
| Actuarial loss (gain) | 13,095 | (15,280) | 13,943 |
| Acquisitions | 0 | 42,952 | 0 |
| Benefits paid | (39,951) | (34,770) | (20,493) |
| Benefit obligation at end of the year | 452,553 | 434,337 | 399,364 |
| Change in plan assets: | |||
| Fair value of plan assets at beginning of year | 545,222 | 468,364 | 419,366 |
| Actual return on plan assets | 69,691 | 48,629 | 63,811 |
| Acquisitions | 0 | 56,201 | 0 |
| Employer contribution | 8,024 | 6,798 | 5,680 |
| Benefits paid | (39,951) | (34,770) | (20,493) |
| Fair value of plan assets at end of year | 582,986 | 545,222 | 468,364 |
| Overfunded status | 130,433 | 110,885 | 69,000 |
| Reconciliation of funding status: | |||
| Past service credit | 60,184 | 70,137 | 80,090 |
| Unrecognized net loss | (11,734) | (34,088) | (69,697) |
| Prepaid benefit cost | 81,983 | 74,836 | 58,607 |
| Accumulated benefit obligation | 452,553 | 434,337 | 399,364 |
| Amounts recognized in accumulated other comprehensive income (“AOCI”), net of tax: | |||
| Unrecognized past service credit | 43,566 | 50,304 | 57,501 |
| Unrecognized net loss | (8,494) | (24,288) | (50,039) |
| Net amount | $ 35,072 | $ 26,016 | $ 7,462 |
Employee Benefits - Schedule of Actuarial Assumptions (Details) |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Pension Plan | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 5.37% | 5.55% |
| Rate of increase in compensation levels | 5.00% | 4.50% |
| Interest rate credit for determining projected cash balance | 4.80% | 4.60% |
| Pension Plan | BEP | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 4.97% | 5.36% |
| Rate of increase in compensation levels | 5.00% | 4.50% |
| Interest rate credit for determining projected cash balance | 4.80% | 4.60% |
| Pension Plan | ODRCP | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 5.00% | 5.44% |
| Rate of increase in compensation levels | 0.00% | 0.00% |
| Interest rate credit for determining projected cash balance | 0.00% | 0.00% |
| Supplemental Employee Retirement Plan | DB SERP | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Discount rate | 5.23% | 5.51% |
| Rate of increase in compensation levels | 0.00% | 0.00% |
| Interest rate credit for determining projected cash balance | 0.00% | 0.00% |
Employee Benefits - Schedule of Assumptions Used to Determine Net Periodic Benefit (Details) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Pension Plan | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Discount rate - benefit cost | 5.55% | 4.99% | 5.18% |
| Rate of compensation increase | 4.50% | 4.50% | 4.50% |
| Expected rate of return on plan assets | 7.25% | 7.50% | 7.50% |
| Interest rate credit for determining projected cash balance | 4.60% | 4.47% | 3.55% |
| Pension Plan | BEP | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Discount rate - benefit cost | 5.36% | 4.89% | 5.07% |
| Rate of compensation increase | 4.50% | 4.50% | 4.50% |
| Interest rate credit for determining projected cash balance | 4.60% | 4.47% | 3.55% |
| Pension Plan | ODRCP | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Discount rate - benefit cost | 5.44% | 4.91% | 5.13% |
| Supplemental Employee Retirement Plan | DB SERP | |||
| Defined Benefit Plan Disclosure [Line Items] | |||
| Discount rate - benefit cost | 5.51% | 4.96% | 5.18% |
Employee Benefits - Schedule of Reconciliation of Interest SBERA Common Collective (Details) - Asset Management Arrangement - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Change in benefit obligation: | ||
| Benefit obligation at beginning of the year | $ 545,222 | $ 468,364 |
| Net realized and unrealized gains | 69,691 | 48,629 |
| Contributions | 0 | 0 |
| Benefits paid | (31,927) | (27,972) |
| Acquisition | 0 | 56,201 |
| Benefit obligation at end of the year | $ 582,986 | $ 545,222 |
Employee Benefits - Schedule of Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Components of net periodic benefit cost: | |||
| Service cost | $ 22,932 | $ 22,470 | $ 24,474 |
| Interest cost | 22,140 | 19,601 | 17,559 |
| Expected return on plan assets | (37,980) | (35,368) | (30,127) |
| Past service credit | (9,953) | (9,953) | (11,560) |
| Recognized net actuarial loss | 3,920 | 7,098 | 9,563 |
| Curtailment | 0 | 0 | (15,908) |
| Settlement | 0 | (29) | 0 |
| Net periodic benefit cost | $ 1,059 | $ 3,819 | (5,999) |
| Discontinued Operations, Held-for-Sale | Insurance Agency Business | |||
| Components of net periodic benefit cost: | |||
| Service cost | $ 5,100 | ||
Employee Benefits - Schedule of Benefits Expected to be Paid (Details) - Pension Plan $ in Thousands |
Dec. 31, 2025
USD ($)
|
|---|---|
| Defined Benefit Plan Disclosure [Line Items] | |
| 2026 | $ 58,073 |
| 2027 | 38,326 |
| 2028 | 41,709 |
| 2029 | 41,523 |
| 2030 | 42,064 |
| In aggregate for 2031-2035 | $ 215,338 |
Employee Benefits- Schedule of Assets Held in Rabbi Trust (Details) - Primary Beneficiary - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Defined Benefit Plan Disclosure [Line Items] | ||
| Rabbi trust investments | $ 106,534 | $ 98,981 |
| Deferred compensation plans | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Rabbi trust investments | 35,619 | 31,611 |
| Supplemental Employee Retirement Plan | DB SERP | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Rabbi trust investments | 14,126 | 14,100 |
| Supplemental Employee Retirement Plan | DC SERP | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Rabbi trust investments | 21,850 | 24,227 |
| Pension Plan | BEP | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Rabbi trust investments | 32,218 | 26,418 |
| Pension Plan | ODRCP | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Rabbi trust investments | $ 2,721 | $ 2,625 |
Employee Benefits - Schedule of Asset Held In Rabbi Trust By Plan Type (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Primary Beneficiary | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Book Value | $ 81,193 | $ 80,196 |
| Unrealized Gain/(Loss) | 25,341 | 18,785 |
| Fair Value | 106,534 | 98,981 |
| Cash and cash equivalents | Primary Beneficiary | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Book Value | 10,495 | 9,109 |
| Fair Value | 10,495 | 9,109 |
| Equities | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Fair Value | 84,200 | 82,300 |
| Equities | Primary Beneficiary | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Book Value | 58,801 | 63,107 |
| Unrealized Gain/(Loss) | 25,440 | 19,229 |
| Fair Value | 84,241 | 82,336 |
| Fixed income | Primary Beneficiary | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Book Value | 11,897 | 7,980 |
| Unrealized Gain/(Loss) | (99) | (444) |
| Fair Value | $ 11,798 | $ 7,536 |
Share-Based Compensation - Narrative (Details) - USD ($) $ in Millions |
1 Months Ended | 3 Months Ended | 12 Months Ended | 37 Months Ended | 49 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Nov. 01, 2025 |
Nov. 29, 2021 |
Oct. 14, 2020 |
May 31, 2025 |
Mar. 31, 2025 |
Sep. 30, 2024 |
May 31, 2024 |
Mar. 31, 2024 |
May 31, 2023 |
Mar. 31, 2023 |
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2024 |
Dec. 31, 2025 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Amount borrowed under ESOP | $ 149.4 | |||||||||||||||
| Total shares (in shares) | 14,940,652 | 14,730,081 | 14,730,081 | 14,776,579 | 14,776,579 | 14,730,081 | ||||||||||
| ESOP loan term | 30 years | |||||||||||||||
| Shares committed to be released (in shares) | 103,190 | 103,190 | 103,078 | 103,078 | 103,190 | |||||||||||
| Exercised option (in shares) | 400,279 | |||||||||||||||
| Outstanding options (in shares) | 328,617 | 328,617 | 328,617 | |||||||||||||
| Aggregate fair value | $ 1.5 | $ 1.5 | $ 1.5 | |||||||||||||
| Weighted average remaining contractual term (in years) | 6 months | |||||||||||||||
| HarborOne Bancorp, Inc. | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Options granted in period (in shares) | 728,896 | |||||||||||||||
| Annual amount from 2022 through 2049 | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Shares committed to be released (in shares) | 495,313 | 495,313 | 495,313 | |||||||||||||
| Annual amount for 2050 | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Shares committed to be released (in shares) | 392,123 | 392,123 | 392,123 | |||||||||||||
| Eastern Bankshares, Inc. 2021 Equity Incentive Plan | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Number of shares authorized (in shares) | 26,146,141 | |||||||||||||||
| Reduction of shares available to be issued upon exercise of stock options with each additional restricted stock grant | 3 | |||||||||||||||
| Options granted in period (in shares) | 0 | 0 | ||||||||||||||
| Share-based payment arrangement, shares withheld for tax withholding obligation (in shares) | 401,357 | 147,323 | 95,808 | |||||||||||||
| Unrecognized compensation expense related to unvested awards | $ 20.8 | $ 20.8 | $ 21.4 | $ 21.4 | $ 20.8 | |||||||||||
| Period for recognition for unrecognized compensation expense related to unvested awards | 1 year 7 months 6 days | 1 year 4 months 24 days | ||||||||||||||
| Eastern Bankshares, Inc. 2021 Equity Incentive Plan | Restricted Stock Units | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Number of shares authorized (in shares) | 7,470,326 | |||||||||||||||
| Award vesting period (in years) | 3 years | 3 years | 3 years | 3 years | ||||||||||||
| Number of shares available for grant (in shares) | 3,134,086 | 3,134,086 | 3,844,157 | 3,844,157 | 3,134,086 | |||||||||||
| Eastern Bankshares, Inc. 2021 Equity Incentive Plan | Share-based Payment Arrangement, Option | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Number of shares authorized (in shares) | 18,675,815 | |||||||||||||||
| Award expiration period | 10 years | |||||||||||||||
| Number of shares available for grant (in shares) | 18,675,815 | 18,675,815 | 18,675,815 | 18,675,815 | 18,675,815 | |||||||||||
| Eastern Bankshares, Inc. 2021 Equity Incentive Plan | Restricted Stock Awards | ||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Award vesting period (in years) | 5 years | 1 year | 1 year | 1 year | ||||||||||||
Share-Based Compensation - Schedule of Compensation Expense Associated With the ESOP (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Share-Based Payment Arrangement [Abstract] | |||
| Compensation expense | $ 8,390 | $ 7,356 | $ 7,129 |
| Interest | 10,628 | 11,543 | 9,374 |
| Principal | 1,800 | 1,523 | 2,914 |
| Total loan payment | $ 12,428 | $ 13,066 | $ 12,288 |
Share-Based Compensation - Schedule of Share Information Held by the ESOP (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Oct. 14, 2020 |
|---|---|---|---|
| Share-Based Payment Arrangement [Abstract] | |||
| Allocated shares (in shares) | 2,347,249 | 1,889,114 | |
| Shares committed to be released (in shares) | 103,190 | 103,078 | |
| Unallocated shares (suspense shares) (in shares) | 12,279,642 | 12,784,387 | |
| Total shares (in shares) | 14,730,081 | 14,776,579 | 14,940,652 |
| Fair value of unallocated shares | $ 226,314 | $ 220,531 |
Share-Based Compensation - Schedule of Share-Based Compensation awards (Details) - Eastern Bankshares, Inc. 2021 Equity Incentive Plan - shares |
1 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Nov. 29, 2021 |
May 31, 2025 |
Mar. 31, 2025 |
Sep. 30, 2024 |
May 31, 2024 |
Mar. 31, 2024 |
May 31, 2023 |
Mar. 31, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Restricted Stock Awards | ||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Grants in period (in shares) | 54,326 | 56,352 | 47,820 | 54,236 | 56,352 | |||||
| Award vesting period (in years) | 5 years | 1 year | 1 year | 1 year | ||||||
| Restricted Stock Units | ||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Grants in period (in shares) | 630,493 | 146,178 | 416,276 | 318,577 | 630,493 | 562,454 | ||||
| Award vesting period (in years) | 3 years | 3 years | 3 years | 3 years | ||||||
| Performance Stock Units | ||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||
| Grants in period (in shares) | 339,503 | 67,350 | 234,091 | 108,984 | 339,503 | 301,441 | ||||
| Award vesting period (in years) | 2 years 9 months 18 days | 2 years 3 months 18 days | 2 years 9 months 18 days | 3 years | ||||||
Share-Based Compensation - Schedule of Share-based Payment Arrangement, Restricted Stock, Restricted Stock Unit, and Performance Stock Unit, Activity (Details) - Eastern Bankshares, Inc. 2021 Equity Incentive Plan - $ / shares |
1 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
May 31, 2025 |
Mar. 31, 2025 |
Sep. 30, 2024 |
May 31, 2024 |
Mar. 31, 2024 |
May 31, 2023 |
Mar. 31, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Restricted Stock Awards | |||||||||
| Number of Shares | |||||||||
| Non-vested stock at beginning of year (in shares) | 316,945 | 420,400 | |||||||
| Granted (in shares) | 54,326 | 56,352 | 47,820 | 54,236 | 56,352 | ||||
| Vested (in shares) | (173,230) | (275,474) | |||||||
| Forfeited (in shares) | (2,983) | (3,026) | |||||||
| Converted in connection with merger (in shares) | 0 | 118,693 | |||||||
| Non-vested stock at end of year (in shares) | 194,968 | 316,945 | |||||||
| Weighted-Average Grant Price Per Share | |||||||||
| Non-vested stock at beginning of year (in dollars per share) | $ 18.02 | $ 19.15 | |||||||
| Granted (in dollars per share) | 15.58 | 13.84 | |||||||
| Vested (in dollars per share) | 17.61 | 16.27 | |||||||
| Forfeited (in dollars per share) | 14.87 | 14.87 | |||||||
| Converted in connection with merger (in dollars per share) | 0 | 14.87 | |||||||
| Non-vested stock at end of year (in dollars per share) | $ 17.75 | $ 18.02 | |||||||
| Restricted Stock Units | |||||||||
| Number of Shares | |||||||||
| Non-vested stock at beginning of year (in shares) | 1,356,522 | 952,001 | |||||||
| Granted (in shares) | 630,493 | 146,178 | 416,276 | 318,577 | 630,493 | 562,454 | |||
| Vested (in shares) | (636,413) | (372,179) | |||||||
| Forfeited (in shares) | (24,620) | (22,520) | |||||||
| Converted in connection with merger (in shares) | 0 | 236,766 | |||||||
| Non-vested stock at end of year (in shares) | 1,325,982 | 1,356,522 | |||||||
| Weighted-Average Grant Price Per Share | |||||||||
| Non-vested stock at beginning of year (in dollars per share) | $ 16.55 | $ 19.46 | |||||||
| Granted (in dollars per share) | 17.73 | 13.83 | |||||||
| Vested (in dollars per share) | 17.09 | 18.62 | |||||||
| Forfeited (in dollars per share) | 15.42 | 13.20 | |||||||
| Converted in connection with merger (in dollars per share) | 0 | 14.87 | |||||||
| Non-vested stock at end of year (in dollars per share) | $ 16.87 | $ 16.55 | |||||||
| Performance Stock Units | |||||||||
| Number of Shares | |||||||||
| Non-vested stock at beginning of year (in shares) | 969,739 | 633,034 | |||||||
| Granted (in shares) | 339,503 | 67,350 | 234,091 | 108,984 | 339,503 | 301,441 | |||
| Vested (in shares) | (408,629) | (76,353) | |||||||
| Forfeited (in shares) | (282,698) | 0 | |||||||
| Converted in connection with merger (in shares) | 0 | 111,617 | |||||||
| Non-vested stock at end of year (in shares) | 617,915 | 969,739 | |||||||
| Weighted-Average Grant Price Per Share | |||||||||
| Non-vested stock at beginning of year (in dollars per share) | $ 16.63 | $ 19.40 | |||||||
| Granted (in dollars per share) | 18.79 | 10.82 | |||||||
| Vested (in dollars per share) | 20.96 | 14.87 | |||||||
| Forfeited (in dollars per share) | 20.57 | 0 | |||||||
| Converted in connection with merger (in dollars per share) | 0 | 14.87 | |||||||
| Non-vested stock at end of year (in dollars per share) | $ 13.15 | $ 16.63 | |||||||
Share-Based Compensation - Schedule of Share-based Compensation Expense Under the 2021 Plan and the Related Tax Benefit (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Share-based compensation expense | $ 16,906 | $ 19,269 | $ 16,047 |
| Eastern Bankshares, Inc. 2021 Equity Incentive Plan | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Share-based compensation expense | 16,900 | 19,300 | 16,500 |
| Related tax benefit | $ 4,700 | $ 5,300 | $ 4,700 |
Commitments and Contingencies (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Commitments to extend credit | ||
| Disclosure Of Financial Instruments Indicated [Line Items] | ||
| Contractual obligation | $ 7,302,751 | $ 6,660,149 |
| Standby letters of credit | ||
| Disclosure Of Financial Instruments Indicated [Line Items] | ||
| Contractual obligation | 83,605 | 83,122 |
| Forward commitments to sell loans | ||
| Disclosure Of Financial Instruments Indicated [Line Items] | ||
| Contractual obligation | $ 35,861 | $ 6,374 |
Derivative Financial Instruments - Schedule of Interest Rate Derivatives (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Disclosure Of Customer Related Derivatives Not Designated As Hedging [Line Items] | ||
| Notional Amount | $ 1,937,500 | $ 2,400,000 |
| Fair Value | 6 | 220 |
| Interest rate swaps | Designated as Hedging Instrument | ||
| Disclosure Of Customer Related Derivatives Not Designated As Hedging [Line Items] | ||
| Notional Amount | $ 1,937,500 | $ 2,400,000 |
| Weighted Average Maturity | 1 year 6 months 29 days | 2 years 6 months 25 days |
| Current Rate Paid | 3.77% | 4.51% |
| Receive Fixed Swap Rate | 3.03% | 3.02% |
| Fair Value | $ 6 | $ 220 |
| Accrued interest payable | $ 600 | $ 1,600 |
Derivative Financial Instruments - Narrative (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Derivative [Line Items] | ||
| Maximum length of time hedged in cash flow hedge | 1 year 8 months 12 days | |
| Credit exposure to settled variation margin in excess of customer related interest rate swap | $ 200,000 | $ 100,000 |
| Derivative, notional amount | 1,937,500,000 | 2,400,000,000 |
| Derivative asset | 55,048,000 | 59,807,000 |
| Derivative liability | 74,719,000 | 99,583,000 |
| Active Cash Flow Hedges | ||
| Derivative [Line Items] | ||
| Interest rate swap cash flow hedges amount expected to reclassified from other comprehensive income to income statement in the next twelve months (less than for amounts related to terminated cash flow hedges) | 5,000,000.0 | |
| Loan Origination Commitments | ||
| Derivative [Line Items] | ||
| Derivative, notional amount | 37,800,000 | 15,700,000 |
| Derivative asset | 500,000 | 0 |
| Derivative liability | 100,000 | 0 |
| Forward Contracts | ||
| Derivative [Line Items] | ||
| Derivative, notional amount | 35,900,000 | 6,400,000 |
| Interest Rate Futures | ||
| Derivative [Line Items] | ||
| Derivative, notional amount | 45,200,000 | 0 |
| Cleared Derivative Transaction | ||
| Derivative [Line Items] | ||
| Additional collateral posted | 40,300,000 | 88,000,000.0 |
| Non Cleared Derivative Transactions | Customer Related Interest Rate Swap Derivatives | ||
| Derivative [Line Items] | ||
| Additional collateral posted | 0 | 0 |
| Fair value of interest rate swap liabilities that are net in a net liability position | $ 0 | $ 0 |
Derivative Financial Instruments - Schedule of Pre-tax Impact of Terminated Cash Flow Hedges on AOCI (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| AOCI Attributable to Parent, Before Tax [Roll Forward] | |||
| Beginning balance | $ 3,611,967 | $ 2,974,855 | $ 2,471,790 |
| Unrealized gains on terminated hedges arising during the period | 0 | 0 | 0 |
| Reclassification adjustments for amortization of unrealized (gains) into net interest income | $ 0 | $ 0 | $ (46) |
| OCI, Cash Flow Hedge, Reclassification for Discontinuance, Statement of Income or Comprehensive Income [Extensible Enumeration] | Interest Income (Expense), Operating | Interest Income (Expense), Operating | Interest Income (Expense), Operating |
| Ending balance | $ 4,340,553 | $ 3,611,967 | $ 2,974,855 |
| Accumulated Gain (Loss), Net, Terminated Cash Flow Hedge, Parent | |||
| AOCI Attributable to Parent, Before Tax [Roll Forward] | |||
| Beginning balance | 0 | 0 | 46 |
| Ending balance | $ 0 | $ 0 | $ 0 |
Derivative Financial Instruments - Schedule of Customer-Related Derivative Positions (Details) $ in Thousands |
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
|---|---|---|
| Disclosure Of Customer Related Derivatives Not Designated As Hedging [Line Items] | ||
| Total Notional | $ 1,937,500 | $ 2,400,000 |
| Interest rate swaps | Not Designated as Hedging Instrument | ||
| Disclosure Of Customer Related Derivatives Not Designated As Hedging [Line Items] | ||
| Number of Positions | 628 | 494 |
| Total Notional | $ 4,666,737 | $ 3,308,037 |
| Risk participation agreements | Not Designated as Hedging Instrument | ||
| Disclosure Of Customer Related Derivatives Not Designated As Hedging [Line Items] | ||
| Number of Positions | 169 | 125 |
| Total Notional | $ 632,464 | $ 503,803 |
| Matched commercial customer book | Not Designated as Hedging Instrument | ||
| Disclosure Of Customer Related Derivatives Not Designated As Hedging [Line Items] | ||
| Number of Positions | 124 | 226 |
| Total Notional | $ 85,353 | $ 98,429 |
| Foreign currency loan | Not Designated as Hedging Instrument | ||
| Disclosure Of Customer Related Derivatives Not Designated As Hedging [Line Items] | ||
| Number of Positions | 3 | 8 |
| Total Notional | $ 3,152 | $ 5,835 |
Derivative Financial Instruments - Schedule of Classification On The Balance Sheet For The Periods Indicated (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Asset Derivatives | ||
| Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Other assets | Other assets |
| Total | $ 55,048 | $ 59,807 |
| Liability Derivatives | ||
| Derivative Liability, Statement of Financial Position [Extensible Enumeration] | Other liabilities | Other liabilities |
| Total | $ 74,719 | $ 99,583 |
| Asset Derivatives | ||
| Asset Derivatives | ||
| Derivatives designated as hedging instruments, assets, at fair value | 30 | 225 |
| Derivatives not designated as hedging instruments, Interest rate swaps, Other assets | 54,561 | 57,526 |
| Derivatives not designated as hedging instruments, Other assets | 55,018 | 59,582 |
| Asset Derivatives | Risk participation agreements | ||
| Asset Derivatives | ||
| Derivatives not designated as hedging instruments, Other assets | 10 | 4 |
| Asset Derivatives | Foreign currency exchange contracts — matched customer book | ||
| Asset Derivatives | ||
| Derivatives not designated as hedging instruments, Other assets | 434 | 1,990 |
| Asset Derivatives | Foreign currency exchange contracts — foreign currency loan | ||
| Asset Derivatives | ||
| Derivatives not designated as hedging instruments, Other assets | 13 | 62 |
| Liability Derivatives | ||
| Liability Derivatives | ||
| Derivatives designated as hedging instruments, liabilities, at fair value | 24 | 5 |
| Derivative not designated as hedging instruments, Interest rate swaps, Other liabilities | 74,358 | 97,594 |
| Derivatives not designated as hedging instruments, Other liabilities | 74,695 | 99,578 |
| Liability Derivatives | Risk participation agreements | ||
| Liability Derivatives | ||
| Derivatives not designated as hedging instruments, Other liabilities | 7 | 4 |
| Liability Derivatives | Foreign currency exchange contracts — matched customer book | ||
| Liability Derivatives | ||
| Derivatives not designated as hedging instruments, Other liabilities | 330 | 1,980 |
| Liability Derivatives | Foreign currency exchange contracts — foreign currency loan | ||
| Liability Derivatives | ||
| Derivatives not designated as hedging instruments, Other liabilities | $ 0 | $ 0 |
Derivative Financial Instruments - Schedule of Company's Derivative Financial Instruments Included in OCI (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain (loss) in OCI on derivatives | $ 3,765 | $ (45,096) | $ (24,855) |
| Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness test) | 0 | 0 | 0 |
| Gain (loss) recognized in other income for foreign currency exchange contracts: | (287) | 764 | (178) |
| Interest Rate Futures | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| (Loss) gain recognized in interest rate swap income | 9 | 0 | 0 |
| Interest Income | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Loss reclassified from OCI into interest income (effective portion) | (28,671) | (52,151) | (48,795) |
| Interest Income | Net Investment Hedging | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness test) | 0 | 0 | 0 |
| Interest Income | Interest rate swaps | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| (Loss) gain recognized in interest rate swap income | (344) | 638 | (274) |
| Interest Income | Risk participation agreements | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| (Loss) gain recognized in interest rate swap income | 3 | (45) | 97 |
| Other Income | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain recognized in income on derivatives (ineffective portion and amount excluded from effectiveness test) | 0 | 0 | 0 |
| Other Income | Foreign currency exchange contracts — matched customer book | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain (loss) recognized in other income for foreign currency exchange contracts: | 94 | (78) | 95 |
| Other Income | Foreign currency exchange contracts — foreign currency loan | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gain (loss) recognized in other income for foreign currency exchange contracts: | $ (49) | $ 249 | $ (96) |
Balance Sheet Offsetting (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Customer-related positions | ||
| Derivative Assets | ||
| Gross Amounts Recognized | $ 55,048 | $ 59,807 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 55,048 | 59,807 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 19,067 | 3,368 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | (15,323) | (48,590) |
| Net Amount | 20,658 | 7,849 |
| Derivative Liabilities | ||
| Gross Amounts Recognized | 74,719 | 99,583 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 74,719 | 99,583 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 19,067 | 3,368 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 24 | 135 |
| Net Amount | 55,628 | 96,080 |
| Interest rate swaps | ||
| Derivative Assets | ||
| Gross Amounts Recognized | 30 | 225 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 30 | 225 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 0 | 0 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 0 | 0 |
| Net Amount | 30 | 225 |
| Derivative Liabilities | ||
| Gross Amounts Recognized | 24 | 5 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 24 | 5 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 0 | 0 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 24 | 5 |
| Net Amount | 0 | 0 |
| Interest rate swaps | Customer-related positions | ||
| Derivative Assets | ||
| Gross Amounts Recognized | 54,561 | 57,526 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 54,561 | 57,526 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 19,067 | 3,368 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | (15,321) | (48,590) |
| Net Amount | 20,173 | 5,568 |
| Derivative Liabilities | ||
| Gross Amounts Recognized | 74,358 | 97,594 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 74,358 | 97,594 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 19,067 | 3,368 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 0 | 130 |
| Net Amount | 55,291 | 94,096 |
| Risk participation agreements | Customer-related positions | ||
| Derivative Assets | ||
| Gross Amounts Recognized | 10 | 4 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 10 | 4 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 0 | 0 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 0 | 0 |
| Net Amount | 10 | 4 |
| Derivative Liabilities | ||
| Gross Amounts Recognized | 7 | 4 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 7 | 4 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 0 | 0 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 0 | 0 |
| Net Amount | 7 | 4 |
| Foreign currency exchange contracts — matched customer book | Customer-related positions | ||
| Derivative Assets | ||
| Gross Amounts Recognized | 434 | 1,990 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 434 | 1,990 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 0 | 0 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | (2) | 0 |
| Net Amount | 432 | 1,990 |
| Derivative Liabilities | ||
| Gross Amounts Recognized | 330 | 1,980 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 330 | 1,980 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 0 | 0 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 0 | 0 |
| Net Amount | 330 | 1,980 |
| Foreign currency exchange contracts — foreign currency loan | Customer-related positions | ||
| Derivative Assets | ||
| Gross Amounts Recognized | 13 | 62 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | |
| Net Amounts Presented in the Statement of Financial Position | 13 | 62 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 0 | |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 0 | |
| Net Amount | 13 | 62 |
| Derivative Liabilities | ||
| Gross Amounts Recognized | 0 | 0 |
| Gross Amounts Offset in the Statement of Financial Position | 0 | 0 |
| Net Amounts Presented in the Statement of Financial Position | 0 | 0 |
| Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments | 0 | 0 |
| Gross Amounts Not Offset in the Statement of Financial Position, Collateral Pledged (Received) | 0 | 0 |
| Net Amount | $ 0 | $ 0 |
Fair Value of Assets and Liabilities - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Maximum | Reported Value Measurement | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Financial instruments original maturity | 90 days | |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Investment in mutual funds | $ 57.1 | $ 54.1 |
Fair Value of Assets and Liabilities - Schedule of The Balances Of Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Assets | |||
| Securities available for sale | $ 3,825,569 | $ 4,021,598 | |
| Mortgage servicing rights | 40,709 | 2,076 | $ 0 |
| Derivative asset | 55,048 | 59,807 | |
| Liabilities | |||
| Derivative liability | 74,719 | 99,583 | |
| Government-sponsored residential mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 2,533,309 | 2,561,895 | |
| Government-sponsored commercial mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 1,060,331 | 1,161,111 | |
| U.S. Agency bonds | |||
| Assets | |||
| Securities available for sale | 17,672 | ||
| U.S. Treasury securities | |||
| Assets | |||
| Securities available for sale | 50,350 | 97,619 | |
| Fair Value, Recurring | |||
| Assets | |||
| Rabbi trust investments | 106,534 | 98,981 | |
| Deferred compensation plan investments | 2,384 | 2,439 | |
| Loans held for sale | 22,761 | 372 | |
| Mortgage servicing rights | 40,709 | ||
| Total | 4,053,463 | 4,183,230 | |
| Liabilities | |||
| Total | 74,819 | 99,624 | |
| Fair Value, Recurring | Risk participation agreements | |||
| Assets | |||
| Derivative asset | 10 | 4 | |
| Liabilities | |||
| Derivative liability | 7 | 4 | |
| Fair Value, Recurring | Foreign currency exchange contracts — matched customer book | |||
| Assets | |||
| Derivative asset | 434 | 1,990 | |
| Liabilities | |||
| Derivative liability | 330 | 1,980 | |
| Fair Value, Recurring | Foreign currency exchange contracts — foreign currency loan | |||
| Assets | |||
| Derivative asset | 13 | 62 | |
| Liabilities | |||
| Derivative liability | 0 | ||
| Fair Value, Recurring | Mortgage derivatives | |||
| Assets | |||
| Derivative asset | 458 | 33 | |
| Liabilities | |||
| Derivative liability | 100 | 41 | |
| Fair Value, Recurring | Designated as Hedging Instrument | Interest rate swaps | |||
| Assets | |||
| Derivative asset | 30 | 225 | |
| Liabilities | |||
| Derivative liability | 24 | 5 | |
| Fair Value, Recurring | Not Designated as Hedging Instrument | Interest rate swaps | |||
| Assets | |||
| Derivative asset | 54,561 | 57,526 | |
| Liabilities | |||
| Derivative liability | 74,358 | 97,594 | |
| Fair Value, Recurring | Government-sponsored residential mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 2,533,309 | 2,561,895 | |
| Fair Value, Recurring | Government-sponsored commercial mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 1,060,331 | 1,161,111 | |
| Fair Value, Recurring | U.S. Agency bonds | |||
| Assets | |||
| Securities available for sale | 17,672 | ||
| Fair Value, Recurring | U.S. Treasury securities | |||
| Assets | |||
| Securities available for sale | 50,350 | 97,619 | |
| Fair Value, Recurring | State and municipal bonds and obligations | |||
| Assets | |||
| Securities available for sale | 181,579 | 183,301 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | |||
| Assets | |||
| Rabbi trust investments | 94,736 | 91,445 | |
| Deferred compensation plan investments | 2,384 | 2,439 | |
| Loans held for sale | 0 | ||
| Mortgage servicing rights | 0 | ||
| Total | 147,470 | 191,503 | |
| Liabilities | |||
| Total | 0 | 0 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Risk participation agreements | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign currency exchange contracts — matched customer book | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign currency exchange contracts — foreign currency loan | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | ||
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage derivatives | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Designated as Hedging Instrument | Interest rate swaps | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Not Designated as Hedging Instrument | Interest rate swaps | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Government-sponsored residential mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 0 | 0 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Government-sponsored commercial mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 0 | ||
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Agency bonds | |||
| Assets | |||
| Securities available for sale | 0 | ||
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities | |||
| Assets | |||
| Securities available for sale | 50,350 | 97,619 | |
| Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | State and municipal bonds and obligations | |||
| Assets | |||
| Securities available for sale | 0 | 0 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | |||
| Assets | |||
| Rabbi trust investments | 11,798 | 7,536 | |
| Deferred compensation plan investments | 0 | 0 | |
| Loans held for sale | 22,761 | 372 | |
| Mortgage servicing rights | 0 | ||
| Total | 3,865,284 | 3,991,727 | |
| Liabilities | |||
| Total | 74,819 | 99,624 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Risk participation agreements | |||
| Assets | |||
| Derivative asset | 10 | 4 | |
| Liabilities | |||
| Derivative liability | 7 | 4 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency exchange contracts — matched customer book | |||
| Assets | |||
| Derivative asset | 434 | 1,990 | |
| Liabilities | |||
| Derivative liability | 330 | 1,980 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Foreign currency exchange contracts — foreign currency loan | |||
| Assets | |||
| Derivative asset | 13 | 62 | |
| Liabilities | |||
| Derivative liability | 0 | ||
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage derivatives | |||
| Assets | |||
| Derivative asset | 458 | 33 | |
| Liabilities | |||
| Derivative liability | 100 | 41 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Designated as Hedging Instrument | Interest rate swaps | |||
| Assets | |||
| Derivative asset | 30 | 225 | |
| Liabilities | |||
| Derivative liability | 24 | 5 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Not Designated as Hedging Instrument | Interest rate swaps | |||
| Assets | |||
| Derivative asset | 54,561 | 57,526 | |
| Liabilities | |||
| Derivative liability | 74,358 | 97,594 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Government-sponsored residential mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 2,533,309 | 2,561,895 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | Government-sponsored commercial mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 1,060,331 | 1,161,111 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Agency bonds | |||
| Assets | |||
| Securities available for sale | 17,672 | ||
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities | |||
| Assets | |||
| Securities available for sale | 0 | 0 | |
| Fair Value, Recurring | Significant Other Observable Inputs (Level 2) | State and municipal bonds and obligations | |||
| Assets | |||
| Securities available for sale | 181,579 | 183,301 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | |||
| Assets | |||
| Rabbi trust investments | 0 | 0 | |
| Deferred compensation plan investments | 0 | 0 | |
| Loans held for sale | 0 | 0 | |
| Mortgage servicing rights | 40,709 | ||
| Total | 40,709 | 0 | |
| Liabilities | |||
| Total | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Risk participation agreements | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Foreign currency exchange contracts — matched customer book | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Foreign currency exchange contracts — foreign currency loan | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | ||
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Mortgage derivatives | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Designated as Hedging Instrument | Interest rate swaps | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Not Designated as Hedging Instrument | Interest rate swaps | |||
| Assets | |||
| Derivative asset | 0 | 0 | |
| Liabilities | |||
| Derivative liability | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Government-sponsored residential mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Government-sponsored commercial mortgage-backed securities | |||
| Assets | |||
| Securities available for sale | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Agency bonds | |||
| Assets | |||
| Securities available for sale | 0 | ||
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury securities | |||
| Assets | |||
| Securities available for sale | 0 | 0 | |
| Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | State and municipal bonds and obligations | |||
| Assets | |||
| Securities available for sale | $ 0 | $ 0 |
Fair Value of Assets and Liabilities - Schedule of The Fair Value Of Assets And Liabilities Measured At Fair Value On A Nonrecurring Basis (Details) - Fair Value, Nonrecurring - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Individually assessed collateral-dependent loans whose fair value is based upon appraisals | $ 96,022 | $ 79,156 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Individually assessed collateral-dependent loans whose fair value is based upon appraisals | 0 | 0 |
| Significant Other Observable Inputs (Level 2) | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Individually assessed collateral-dependent loans whose fair value is based upon appraisals | 0 | 0 |
| Significant Unobservable Inputs (Level 3) | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Individually assessed collateral-dependent loans whose fair value is based upon appraisals | $ 96,022 | $ 79,156 |
Fair Value of Assets and Liabilities - Schedule of Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | $ 599,557 | $ 420,715 |
| Loans, net of allowance for loan losses | 22,753,224 | 17,549,402 |
| FHLB stock | 13,838 | 5,865 |
| Bank-owned life insurance | 307,836 | 204,704 |
| Deposits | 25,470,751 | 21,319,340 |
| FHLB advances | 199,617 | 17,589 |
| Interest rate swap collateral funds | 15,321 | 48,590 |
| Government-sponsored residential mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 210,142 | 231,709 |
| Government-sponsored commercial mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 185,185 | 189,006 |
| State and municipal bonds and obligations | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 167,346 | |
| Corporate debt bonds | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 36,884 | |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Loans, net of allowance for loan losses | 0 | 0 |
| FHLB stock | 0 | 0 |
| Bank-owned life insurance | 0 | 0 |
| Deposits | 0 | 0 |
| FHLB advances | 0 | 0 |
| Interest rate swap collateral funds | 0 | 0 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | Government-sponsored residential mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 0 | 0 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | Government-sponsored commercial mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 0 | 0 |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | State and municipal bonds and obligations | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 0 | |
| Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt bonds | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 0 | |
| Significant Other Observable Inputs (Level 2) | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Loans, net of allowance for loan losses | 0 | 0 |
| FHLB stock | 13,838 | 5,865 |
| Bank-owned life insurance | 307,836 | 204,704 |
| Deposits | 25,469,630 | 21,315,556 |
| FHLB advances | 196,450 | 15,310 |
| Interest rate swap collateral funds | 15,321 | 48,590 |
| Significant Other Observable Inputs (Level 2) | Government-sponsored residential mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 194,547 | 202,271 |
| Significant Other Observable Inputs (Level 2) | Government-sponsored commercial mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 173,584 | 169,453 |
| Significant Other Observable Inputs (Level 2) | State and municipal bonds and obligations | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 169,861 | |
| Significant Other Observable Inputs (Level 2) | Corporate debt bonds | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 37,982 | |
| Significant Unobservable Inputs (Level 3) | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Loans, net of allowance for loan losses | 22,365,428 | 17,126,716 |
| FHLB stock | 0 | 0 |
| Bank-owned life insurance | 0 | 0 |
| Deposits | 0 | 0 |
| FHLB advances | 0 | 0 |
| Interest rate swap collateral funds | 0 | 0 |
| Significant Unobservable Inputs (Level 3) | Government-sponsored residential mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 0 | 0 |
| Significant Unobservable Inputs (Level 3) | Government-sponsored commercial mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 0 | 0 |
| Significant Unobservable Inputs (Level 3) | State and municipal bonds and obligations | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 0 | |
| Significant Unobservable Inputs (Level 3) | Corporate debt bonds | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 0 | |
| Carrying Value | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Loans, net of allowance for loan losses | 22,753,224 | 17,549,402 |
| FHLB stock | 13,838 | 5,865 |
| Bank-owned life insurance | 307,836 | 204,704 |
| Deposits | 25,470,751 | 21,319,340 |
| FHLB advances | 199,617 | 17,589 |
| Interest rate swap collateral funds | 15,321 | 48,590 |
| Carrying Value | Government-sponsored residential mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 210,142 | 231,709 |
| Carrying Value | Government-sponsored commercial mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 185,185 | 189,006 |
| Carrying Value | State and municipal bonds and obligations | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 167,346 | |
| Carrying Value | Corporate debt bonds | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 36,884 | |
| Fair Value | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Loans, net of allowance for loan losses | 22,365,428 | 17,126,716 |
| FHLB stock | 13,838 | 5,865 |
| Bank-owned life insurance | 307,836 | 204,704 |
| Deposits | 25,469,630 | 21,315,556 |
| FHLB advances | 196,450 | 15,310 |
| Interest rate swap collateral funds | 15,321 | 48,590 |
| Fair Value | Government-sponsored residential mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 194,547 | 202,271 |
| Fair Value | Government-sponsored commercial mortgage-backed securities | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 173,584 | $ 169,453 |
| Fair Value | State and municipal bonds and obligations | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | 169,861 | |
| Fair Value | Corporate debt bonds | ||
| Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] | ||
| Held to maturity securities: | $ 37,982 |
Revenue from Contracts with Customers - Schedule of Revenue from External Customers by Products and Services (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Revenue from External Customer [Line Items] | |||
| Total noninterest income in-scope of ASC 606 | $ 134,091 | $ 112,619 | $ 76,866 |
| Total noninterest (loss) income out-of-scope of ASC 606 | (240,027) | 11,298 | (314,619) |
| Total noninterest (loss) income | (105,936) | 123,917 | (237,753) |
| Investment advisory fees | |||
| Revenue from External Customer [Line Items] | |||
| Total noninterest income in-scope of ASC 606 | 69,921 | 46,126 | 24,264 |
| Service charges on deposit accounts | |||
| Revenue from External Customer [Line Items] | |||
| Total noninterest income in-scope of ASC 606 | 35,035 | 32,004 | 28,631 |
| Card income | |||
| Revenue from External Customer [Line Items] | |||
| Total noninterest income in-scope of ASC 606 | 18,260 | 16,612 | 15,777 |
| Other non-interest income | |||
| Revenue from External Customer [Line Items] | |||
| Total noninterest income in-scope of ASC 606 | $ 10,875 | $ 17,877 | $ 8,194 |
Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Investment advisory fees | ||
| Disaggregation of Revenue [Line Items] | ||
| Fess earned but not yet received | $ 6.3 | $ 5.7 |
| Service charges on deposit accounts | ||
| Disaggregation of Revenue [Line Items] | ||
| Fess earned but not yet received | 1.6 | 1.6 |
| Card income | ||
| Disaggregation of Revenue [Line Items] | ||
| Fess earned but not yet received | $ 1.1 | $ 1.2 |
Other Comprehensive Income - Schedule of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Total other comprehensive income (loss) | $ 484,282 | $ 30,054 | $ 404,700 |
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Total other comprehensive income (loss) | (127,316) | (6,031) | (89,860) |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | 144,393 | (23,742) | 33,908 |
| Less: reclassification adjustments | (212,573) | (47,765) | (280,932) |
| Total other comprehensive income | 356,966 | 24,023 | 314,840 |
| Change in fair value of securities available for sale | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | 169,814 | (19,461) | 47,104 |
| Less: reclassification adjustments | (269,638) | (16,798) | (333,170) |
| Total other comprehensive income (loss) | 439,452 | (2,663) | 380,274 |
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Before reclassifications | (41,511) | 7,684 | (9,731) |
| Less: reclassification adjustments | 73,427 | 4,653 | 74,630 |
| Total other comprehensive income (loss) | (114,938) | 3,031 | (84,361) |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | 128,303 | (11,777) | 37,373 |
| Less: reclassification adjustments | (196,211) | (12,145) | (258,540) |
| Total other comprehensive income | 324,514 | 368 | 295,913 |
| Unrealized losses on cash flow hedges: | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | 3,765 | (45,096) | (24,855) |
| Less: reclassification adjustments | (28,671) | (52,151) | (48,795) |
| Total other comprehensive income (loss) | 32,436 | 7,055 | 23,940 |
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Before reclassifications | (1,014) | 12,492 | 8,165 |
| Less: reclassification adjustments | 7,942 | 14,446 | 13,517 |
| Total other comprehensive income (loss) | (8,956) | (1,954) | (5,352) |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | 2,751 | (32,604) | (16,690) |
| Less: reclassification adjustments | (20,729) | (37,705) | (35,278) |
| Total other comprehensive income | 23,480 | 5,101 | 18,588 |
| Defined Benefit Pension Plans | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Total other comprehensive income (loss) | 12,394 | 25,662 | 486 |
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Total other comprehensive income (loss) | (3,422) | (7,108) | (147) |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | 13,339 | 20,639 | 13,225 |
| Less: reclassification adjustments | 4,367 | 2,085 | 12,886 |
| Total other comprehensive income | 8,972 | 18,554 | 339 |
| Change in actuarial net loss | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | 18,427 | 28,546 | 19,742 |
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Before reclassifications | (5,088) | (7,907) | (5,547) |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | 13,339 | 20,639 | 14,195 |
| BEP and Defined Benefit Plan amendments - accelerated vesting | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | (1,351) | ||
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Before reclassifications | 381 | ||
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Before reclassifications | (970) | ||
| Less: amortization of actuarial net loss | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Less: reclassification adjustments | (3,920) | (7,098) | (9,563) |
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Less: reclassification adjustments | 1,082 | 1,966 | 2,693 |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Less: reclassification adjustments | (2,838) | (5,132) | (6,870) |
| Less: Defined Benefit Plan settlement gain | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Less: reclassification adjustments | 29 | ||
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Less: reclassification adjustments | (8) | ||
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Less: reclassification adjustments | 21 | ||
| Less: BEP and Defined Benefit Plan curtailment gain | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Less: reclassification adjustments | 15,908 | ||
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Less: reclassification adjustments | (4,490) | ||
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Less: reclassification adjustments | 11,418 | ||
| Less: accretion of prior service credit | |||
| Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] | |||
| Less: reclassification adjustments | 9,953 | 9,953 | 11,560 |
| Other Comprehensive Income (Loss), Tax [Abstract] | |||
| Less: reclassification adjustments | (2,748) | (2,757) | (3,222) |
| Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] | |||
| Less: reclassification adjustments | $ 7,205 | $ 7,196 | $ 8,338 |
Other Comprehensive Income - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||
| Beginning balance | $ 3,611,967 | $ 2,974,855 | $ 2,471,790 |
| Other comprehensive income (loss) before reclassifications | 144,393 | (23,742) | 33,908 |
| Less: Amounts reclassified from accumulated other comprehensive (loss) income | (212,573) | (47,765) | (280,932) |
| Net current-period other comprehensive income | 356,966 | 24,023 | 314,840 |
| Ending balance | 4,340,553 | 3,611,967 | 2,974,855 |
| Total | |||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||
| Beginning balance | (584,329) | (608,352) | (923,192) |
| Net current-period other comprehensive income | 356,966 | 24,023 | 314,840 |
| Ending balance | (227,363) | (584,329) | (608,352) |
| Unrealized (Losses) and Gains on Available for Sale Securities | |||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||
| Beginning balance | (583,875) | (584,243) | (880,156) |
| Other comprehensive income (loss) before reclassifications | 128,303 | (11,777) | 37,373 |
| Less: Amounts reclassified from accumulated other comprehensive (loss) income | (196,211) | (12,145) | (258,540) |
| Net current-period other comprehensive income | 324,514 | 368 | 295,913 |
| Ending balance | (259,361) | (583,875) | (584,243) |
| Unrealized (Losses) and Gains on Cash Flow Hedges | |||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||
| Beginning balance | (26,470) | (31,571) | (50,159) |
| Other comprehensive income (loss) before reclassifications | 2,751 | (32,604) | (16,690) |
| Less: Amounts reclassified from accumulated other comprehensive (loss) income | (20,729) | (37,705) | (35,278) |
| Net current-period other comprehensive income | 23,480 | 5,101 | 18,588 |
| Ending balance | (2,990) | (26,470) | (31,571) |
| Defined Benefit Pension Plans | |||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | |||
| Beginning balance | 26,016 | 7,462 | 7,123 |
| Other comprehensive income (loss) before reclassifications | 13,339 | 20,639 | 13,225 |
| Less: Amounts reclassified from accumulated other comprehensive (loss) income | 4,367 | 2,085 | 12,886 |
| Net current-period other comprehensive income | 8,972 | 18,554 | 339 |
| Ending balance | $ 34,988 | $ 26,016 | $ 7,462 |
Other Comprehensive Income - Schedule of Reclassified Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Losses on sales of securities available for sale, net | $ 269,638 | $ 16,798 | $ 333,170 |
| Tax benefit | (11,287) | (36,205) | 63,309 |
| Net income from discontinued operations | 0 | 0 | (294,866) |
| Net of tax | (88,219) | (119,561) | (232,177) |
| Reclassification out of Accumulated Other Comprehensive Income | |||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Net of tax | (212,573) | (47,765) | (280,932) |
| Unrealized losses on available-for-sale securities | Reclassification out of Accumulated Other Comprehensive Income | |||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Losses on sales of securities available for sale, net | (269,638) | (16,798) | (333,170) |
| Total before tax | (269,638) | (16,798) | (333,170) |
| Tax benefit | 73,427 | 4,653 | 74,630 |
| Net of tax | (196,211) | (12,145) | (258,540) |
| Unrealized (losses) gains on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income | |||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Total before tax | (28,671) | (52,151) | (48,795) |
| Tax benefit | 7,942 | 14,446 | 13,517 |
| Interest income | (28,671) | (52,151) | (48,795) |
| Net of tax | (20,729) | (37,705) | (35,278) |
| Amortization of defined benefit pension items | Reclassification out of Accumulated Other Comprehensive Income | |||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Net periodic pension cost - see Note 16 | (3,920) | (7,069) | (9,563) |
| BEP and Defined Benefit Plan curtailment gain | Reclassification out of Accumulated Other Comprehensive Income | |||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Net income from discontinued operations | 0 | 0 | 15,908 |
| Accretion of prior service credit | Reclassification out of Accumulated Other Comprehensive Income | |||
| Accumulated Other Comprehensive Income (Loss) [Line Items] | |||
| Total before tax | 6,033 | 2,884 | 17,905 |
| Tax benefit | (1,666) | (799) | (5,019) |
| Net periodic pension cost - see Note 16 | 9,953 | 9,953 | 11,560 |
| Net of tax | $ 4,367 | $ 2,085 | $ 12,886 |
Discontinued Operations - Narrative (Details) - USD ($) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Oct. 31, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Sep. 19, 2023 |
|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
| Noninterest expense | $ 596,943 | $ 508,368 | $ 418,602 | ||
| Net reduction of the lease ROU assets | (2,400) | (5,500) | |||
| Impairment charge | $ 3,500 | $ 4,700 | |||
| Discontinued Operations, Held-for-Sale | Insurance Agency Business | |||||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
| Gross cash consideration | $ 515,000 | ||||
| Net cash consideration | $ 498,100 | ||||
| Working capital adjustment | 4,200 | ||||
| Transaction expenses | 17,000 | ||||
| Post-retirement liabilities | 4,100 | ||||
| Fiduciary cash transferred | 7,400 | ||||
| Gain (loss) on disposition of assets | 408,600 | ||||
| Noninterest expense | $ 22,300 | ||||
| Net reduction of the lease ROU assets | 6,400 | ||||
| Impairment charge | 2,000 | ||||
| Disposal Group, Not Discontinued Operations, Transferrable Upon Sale to Entity | Insurance Agency Business | |||||
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||||
| Transitional services period | 6 months | ||||
| ROU lease asset | 500 | ||||
| Lease liability | $ 300 | ||||
Discontinued Operations - Schedule of the Operating Results of the Discontinued Insurance Agency Business (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Noninterest expense: | |||
| Income from discontinued operations, net of taxes | $ 0 | $ 0 | $ 294,866 |
| Discontinued Operations, Held-for-Sale | Insurance Agency Business | |||
| Noninterest income: | |||
| Insurance commissions | 93,997 | ||
| Miscellaneous income and fees | 67 | ||
| Total noninterest income | 94,064 | ||
| Noninterest expense: | |||
| Salaries and employee benefits | 76,109 | ||
| Occupancy and equipment | 4,420 | ||
| Technology and data processing | 3,577 | ||
| Professional services | 1,176 | ||
| Marketing expenses | 179 | ||
| Amortization of intangible assets | 2,002 | ||
| Other | 5,304 | ||
| Total noninterest expense | 92,767 | ||
| Income from discontinued operations before income tax expense | 1,297 | ||
| Gain on sale of discontinued operations before income tax expense | 408,629 | ||
| Total gain on discontinued operations before income tax expense | 409,926 | ||
| Income tax benefit | 115,060 | ||
| Income from discontinued operations, net of taxes | 294,866 | ||
| Disposal Group, Not Discontinued Operations, Transferrable Upon Sale to Entity | Insurance Agency Business | |||
| Noninterest income: | |||
| Income from investments held in rabbi trusts | 697 | ||
| Miscellaneous income and fees | 60 | ||
| Total noninterest income | 757 | ||
| Noninterest expense: | |||
| Salaries and employee benefits | 721 | ||
| Occupancy and equipment | 433 | ||
| Other | 1,608 | ||
| Total noninterest expense | 2,762 | ||
| Total gain on discontinued operations before income tax expense | (2,005) | ||
| Income tax benefit | (564) | ||
| Income from discontinued operations, net of taxes | $ (1,441) | ||
Parent Company Financial Statements - Schedule of Balance Sheets (Details) - USD ($) $ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|---|---|---|---|---|
| Assets | ||||
| Goodwill and other intangibles, net | $ 1,300,930 | $ 1,050,158 | ||
| Deferred income taxes, net | 309,963 | 332,128 | ||
| Other assets | 756,396 | 667,473 | ||
| Total assets | 30,586,856 | 25,557,880 | ||
| Liabilities [Abstract] | ||||
| Other liabilities | 560,614 | 560,394 | ||
| Total liabilities | 26,246,303 | 21,945,913 | ||
| Shareholders’ equity | ||||
| Total shareholders’ equity | 4,340,553 | 3,611,967 | $ 2,974,855 | $ 2,471,790 |
| Total liabilities and shareholders’ equity | 30,586,856 | 25,557,880 | ||
| Parent Company | ||||
| Assets | ||||
| Cash and cash equivalents | 196,678 | 186,589 | ||
| Goodwill and other intangibles, net | 744 | 744 | ||
| Deferred income taxes, net | 2,479 | 2,455 | ||
| Investment in subsidiaries | 4,143,227 | 3,418,356 | ||
| Other assets | 6,958 | 5,246 | ||
| Total assets | 4,350,086 | 3,613,390 | ||
| Liabilities [Abstract] | ||||
| Other liabilities | 9,532 | 1,423 | ||
| Total liabilities | 9,532 | 1,423 | ||
| Shareholders’ equity | ||||
| Total shareholders’ equity | 4,340,554 | 3,611,967 | ||
| Total liabilities and shareholders’ equity | 4,350,086 | 3,613,390 | ||
| Other/Eliminations | ||||
| Assets | ||||
| Cash and cash equivalents | $ 195,000 | $ 185,000 |
Parent Company Financial Statements - Schedule of Income Statement (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Expenses | |||
| Professional services | $ 14,641 | $ 12,753 | $ 13,305 |
| Total noninterest expense | 596,943 | 508,368 | 418,602 |
| Income tax (benefit) expense | 11,287 | 36,205 | (63,309) |
| Net income | 88,219 | 119,561 | 232,177 |
| Parent | |||
| Income | |||
| Interest income | 125 | 142 | 130 |
| Other | 1,693 | 9,291 | 0 |
| Total income | 1,818 | 9,433 | 130 |
| Expenses | |||
| Professional services | 2,454 | 5,877 | 4,937 |
| Other | 19,310 | 4,170 | 3,706 |
| Total noninterest expense | 21,764 | 10,047 | 8,643 |
| Loss before income taxes and equity in undistributed income of subsidiaries | (19,946) | (614) | (8,513) |
| Income tax (benefit) expense | (4,379) | 973 | (1,773) |
| Loss before equity in undistributed income of subsidiaries | (15,567) | (1,587) | (6,740) |
| Equity in undistributed income of subsidiaries | 103,786 | 121,148 | 238,917 |
| Net income | $ 88,219 | $ 119,561 | $ 232,177 |
Parents Company Financial Statements - Schedule of Cash Flows Statement (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Operating activities | |||
| Net income | $ 88,219 | $ 119,561 | $ 232,177 |
| Adjustments to reconcile net income to net cash provided by operating activities | |||
| Share-based compensation | 16,906 | 19,269 | 16,047 |
| ESOP expense | 8,390 | 7,356 | 7,129 |
| Gain on sale of other equity investment | (1,584) | (9,291) | 0 |
| Net cash provided by operating activities | 432,420 | 283,836 | 261,692 |
| Investing activities | |||
| Contributions to other equity investments | (1,698) | (1,005) | (720) |
| Proceeds from sale of other equity investment | 1,944 | 9,958 | 0 |
| Net cash (paid) acquired in business combination | (1,412) | 24,879 | 0 |
| Net cash (used in) provided by investing activities | (364,021) | 1,059,397 | 2,400,265 |
| Financing activities | |||
| Dividends declared and paid to common shareholders | (105,717) | (82,541) | (66,671) |
| Proceeds from the exercise of stock options | 5,113 | 0 | 0 |
| Payments for shares repurchased under share repurchase plans | (106,589) | (27,683) | 0 |
| Stock issuance costs | (122) | (941) | 0 |
| Net cash used in financing activities - continuing operations | (758,410) | (1,029,429) | (2,137,425) |
| Net (decrease) increase in cash, cash equivalents, and restricted cash | (690,011) | 313,804 | 523,571 |
| Cash, cash equivalents, and restricted cash at beginning of period | 1,006,880 | 693,076 | 169,505 |
| Cash, cash equivalents, and restricted cash at end of period | 316,869 | 1,006,880 | 693,076 |
| Parent | |||
| Operating activities | |||
| Net income | 88,219 | 119,561 | 232,177 |
| Adjustments to reconcile net income to net cash provided by operating activities | |||
| Equity in undistributed income of subsidiaries | (103,786) | (121,148) | (238,917) |
| Share-based compensation | 16,906 | 19,269 | 16,513 |
| ESOP expense | 8,390 | 7,356 | 7,129 |
| Gain on sale of other equity investment | (1,584) | (9,291) | 0 |
| Deferred income tax (benefit) expense | (417) | 4,308 | 6,419 |
| Other, net | (3,084) | 736 | (4,115) |
| Net cash provided by operating activities | 4,644 | 20,791 | 19,206 |
| Investing activities | |||
| Return of investments in subsidiary | 274,000 | 128,000 | 40,000 |
| Contributions to other equity investments | (203) | (405) | (720) |
| Proceeds from sale of other equity investment | 1,944 | 9,958 | 0 |
| Net cash (paid) acquired in business combination | (62,981) | 21,154 | 0 |
| Net cash (used in) provided by investing activities | 212,760 | 158,707 | 39,280 |
| Financing activities | |||
| Dividends declared and paid to common shareholders | (105,717) | (82,541) | (66,671) |
| Proceeds from the exercise of stock options | 5,113 | 0 | 0 |
| Payments for shares repurchased under share repurchase plans | (106,589) | (27,683) | 0 |
| Stock issuance costs | (122) | (941) | 0 |
| Net cash used in financing activities - continuing operations | (207,315) | (111,165) | (66,671) |
| Net (decrease) increase in cash, cash equivalents, and restricted cash | 10,089 | 68,333 | (8,185) |
| Cash, cash equivalents, and restricted cash at beginning of period | 186,589 | 118,256 | 126,441 |
| Cash, cash equivalents, and restricted cash at end of period | $ 196,678 | $ 186,589 | $ 118,256 |
Segment Reporting (Details) |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
segment
| |
| Segment Reporting [Abstract] | |
| Number of reportable segments | 1 |