COLUMBIA BANKING SYSTEM, INC., 10-K filed on 2/27/2020
Annual Report
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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Jan. 31, 2020
Jun. 30, 2019
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 0-20288    
Entity Registrant Name COLUMBIA BANKING SYSTEM, INC.    
Entity Incorporation, State or Country Code WA    
Entity Tax Identification Number 91-1422237    
Entity Address, Address Line One 1301 A Street    
Entity Address, City or Town Tacoma    
Entity Address, State or Province WA    
Entity Address, Postal Zip Code 98402-2156    
City Area Code 253    
Local Phone Number 305-1900    
Title of 12(b) Security Common Stock, No Par Value    
Trading Symbol COLB    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 2,622,530,600
Entity Common Stock, Shares Outstanding   72,146,350  
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000887343    
Current Fiscal Year End Date --12-31    
Amendment Flag false    
v3.19.3.a.u2
Consolidated Balance Sheets - USD ($)
shares in Thousands, $ in Thousands
Dec. 31, 2019
Dec. 31, 2018
ASSETS    
Cash and due from banks $ 223,541 $ 260,180
Interest-earning deposits with banks 24,132 17,407
Total cash and cash equivalents 247,673 277,587
Debt Securities, Available-for-sale 3,746,142 3,167,448
Federal Home Loan Bank stock at cost 48,120 25,960
Loans held for sale 17,718 3,849
Loans, net of unearned income 8,743,465 8,391,511
Loans and Leases Receivable, Allowance 83,968 83,369
Loans, net 8,659,497 8,308,142
Interest receivable 46,839 45,323
Premises and equipment, net 165,408 168,788
Other real estate owned 552 6,019
Goodwill 765,842 765,842
Other intangible assets, net 35,458 45,937
Other assets 346,275 280,250
Total Assets 14,079,524 13,095,145
LIABILITIES AND SHAREHOLDERS' EQUITY    
Noninterest-bearing 5,328,146 5,227,216
Interest-bearing 5,356,562 5,230,910
Total deposits 10,684,708 10,458,126
Federal Home Loan Bank advances 953,469 399,523
Securities sold under agreements to repurchase 64,437 61,094
Subordinated Debt 35,277 35,462
Other liabilities 181,671 107,291
Total liabilities $ 11,919,562 $ 11,061,496
Shareholders' equity:    
Preferred Stock, Shares Authorized 2,000 2,000
Common stock Authorized shares 115,000 115,000
Common Stock Shares Issued 73,577 73,249
Common Stock (no par value) $ 1,650,753 $ 1,642,246
Common Stock Shares Outstanding 72,124 73,249
Retained earnings $ 519,676 $ 426,708
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 40,367 $ (35,305)
Treasury Stock, Shares 1,453 0
Treasury Stock, Value $ (50,834) $ 0
Total shareholders' equity 2,159,962 2,033,649
Total Liabilities and Shareholders' Equity $ 14,079,524 $ 13,095,145
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Consolidated Balance Sheets (Parenthetical) - $ / shares
$ / shares in Thousands
Dec. 31, 2019
Dec. 31, 2018
Common stock, par value $ 0 $ 0
Preferred Stock, No Par Value $ 0 $ 0
v3.19.3.a.u2
Consolidated Statements of Income - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Interest Income      
Loans $ 448,041 $ 428,197 $ 324,229
Taxable securities 69,864 55,969 38,659
Tax-exempt securities 10,735 12,201 11,045
Deposits in banks 1,312 702 813
Total interest income 529,952 497,069 374,746
Interest Expense      
Deposits 22,146 12,105 4,800
FHLB advances 11,861 3,750 1,078
Subordinated debentures 1,871 1,871 304
Other borrowings 669 504 575
Total interest expense 36,547 18,230 6,757
Net Interest Income 493,405 478,839 367,989
Provision for loan and lease losses 3,493 14,769 8,631
Net interest income after provision for loan and lease losses 489,912 464,070 359,358
Noninterest Income      
Deposit account and treasury management fees 35,695 36,072 30,381
Card revenue 15,198 19,719 25,627
Financial services and trust revenue 12,799 12,135 11,478
Loan revenue 13,465 11,866 12,399
Merchant processing revenue 0 0 4,283
Bank owned life insurance 6,294 6,007 5,380
Investment securities gains (losses), net 2,132 (89) (11)
Gain on sale of merchant card services portfolio 0 0 14,000
Change in FDIC loss sharing asset 0 0 (447)
Other 11,598 2,546 6,552
Total noninterest income 97,181 88,256 109,642
Noninterest Expense      
Compensation and employee benefits 212,867 200,199 169,674
Occupancy 35,176 36,576 32,407
Data processing 19,164 20,235 18,205
Legal and professional fees 21,645 18,044 15,151
Amortization of intangibles 10,479 12,236 6,333
Business and Occupation taxes [1] 5,846 5,664 4,326
Advertising and promotion 4,925 5,584 4,466
Regulatory premiums 1,920 3,710 3,183
Merchant processing 0 0 2,196
Net cost (benefit) of operation of OREO (692) 1,218 468
Other [1] 34,152 37,024 34,608
Total noninterest expense 345,482 340,490 291,017
Income before income taxes 241,611 211,836 177,983
Income tax provision 47,160 38,954 65,155
Net Income $ 194,451 $ 172,882 $ 112,828
Per Common Share      
Basic earnings per common share $ 2.68 [2] $ 2.36 [2] $ 1.86
Diluted earnings per common share $ 2.68 [2] $ 2.36 [2] $ 1.86
Weighted average number of common shares outstanding 71,999 72,385 59,882
Weighted average number of diluted common shares outstanding 72,032 72,390 59,888
[1] Beginning January 1, 2019, B&O taxes are reported separately from other taxes, licenses and fees, which are now reported under “other noninterest expense.” Prior periods have been reclassified to conform to current period presentation.
[2] Due to averaging of shares, quarterly EPS may not add up to the totals reported for the full year.
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Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Net income $ 194,451 $ 172,882 $ 112,828
Unrealized gain (loss) from securities:      
Net unrealized holding gain (loss) from available for sale debt securities arising during the period, net of tax of ($20,540), $4,067 and $1,932 67,802 (13,425) (3,391)
Reclassification adjustment of net gain (loss) from available for sale debt securities arising during the period, net of tax of $496, $25 and ($4) (1,636) (81) 7
Net unrealized gain (loss) from available for sale debt securities, net of reclassification adjustment 66,166 (13,506) (3,384)
Pension plan liability adjustment:      
Unrecognized net actuarial gain (loss) and plan amendments during the period, net of tax of $619, ($7) and ($2,287) (2,042) 24 4,017
Less: amortization of unrecognized net actuarial losses included in net periodic pension cost, net of tax of ($74), ($74) and ($127) (245) (245) (223)
Pension plan liability adjustment, net 1,797 (269) (4,240)
Unrealized gain from cash flow hedging instruments:      
Net unrealized gain in cash flow hedging instruments arising during the period, net of tax of ($3,562), $0 and $0 11,760 0 0
Reclassification adjustment for net gain (loss) in cash flow hedging instruments included in income, net of tax of $138, $0 and $0 (457) 0 0
Net unrealized gain from cash flow hedging instruments, net of reclassification adjustment 11,303 0 0
Other comprehensive income (loss) 75,672 (13,237) 856
Total comprehensive income $ 270,123 $ 159,645 $ 113,684
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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Net unrealized holding gain (loss) from available for sale securities arising during the period, tax $ (20,540) $ 4,067 $ 1,932
Reclassification adjustment of net gain (loss) from sale of available for sale securities included in income, tax 496 25 (4)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax 619 (7) (2,287)
Less: amortization of unrecognized net actuarial loss included in net periodic pension cost, tax (74) (74) (127)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax (3,562) 0 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax $ 138 $ 0 $ 0
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Consolidated Statements of Changes in Shareholders' Equity - USD ($)
$ in Thousands
Total
Preferred Stock [Member]
Common Stock [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-09 [Member] $ 67   $ 184   $ (117)  
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2018-02 [Member] 0       4,082 $ (4,082)
Balance, value at Dec. 31, 2016 1,251,012 $ 2,217 $ 995,837   271,957 (18,999)
Balance (in shares) at Dec. 31, 2016   9,000 58,042,000      
Net income 112,828       112,828  
Other comprehensive income 856         856
Issuance of common stock - acquisition related, shares   0 14,642,000      
Issuance of common stock - acquisition related, value 636,385 $ 0 $ 636,385      
Issuance of common stock - stock option and other plans, shares     49,000      
Issuance of common stock - stock option and other plans, value 1,980   $ 1,980      
Issuance of common stock - restricted stock awards, net of canceled awards, shares     241,000      
Issuance of common stock - restricted stock awards, net of canceled awards, value 7,745   $ 7,745      
Preferred stock conversion to common stock, shares   (9,000)        
Preferred stock conversion to common stock, value   $ (2,217)        
Preferred stock conversion to common stock, shares Issued     102,000      
Preferred stock conversion to common stock, value Issued 0   $ 2,217      
Activity in deferred compensation 1          
Purchase and retirement of common stock, shares     (56,000)      
Purchase and retirement of common stock, value (2,299)   $ (2,299)      
Cash settlement of acquired equity awards, value (7,345)   (7,345)      
Cash dividends declared on common stock (51,308)       (51,308)  
Balance, value at Dec. 31, 2017 $ 1,949,922 $ 0 $ 1,634,705   337,442 (22,225)
Balance (in shares) at Dec. 31, 2017   0 73,020,000      
Common Stock, Dividends, Per Share, paid $ 0.88          
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2018-02 [Member]           (4,082)
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-01 [Member] $ 0       (157) 157
Net income 172,882       172,882  
Other comprehensive income (13,237)         (13,237)
Issuance of common stock - stock option and other plans, shares     46,000      
Issuance of common stock - stock option and other plans, value 1,857   $ 1,857      
Issuance of common stock - restricted stock awards, net of canceled awards, shares     246,000      
Issuance of common stock - restricted stock awards, net of canceled awards, value 8,354   $ 8,354      
Activity in deferred compensation 7   $ 7      
Purchase and retirement of common stock, shares     (63,000)      
Purchase and retirement of common stock, value (2,677)   $ (2,677)      
Cash dividends declared on common stock (83,459)       (83,459)  
Balance, value at Dec. 31, 2018 $ 2,033,649 $ 0 $ 1,642,246   426,708 (35,305)
Balance (in shares) at Dec. 31, 2018   0 73,249,000      
Common Stock, Dividends, Per Share, paid $ 1.14          
Cumulative Effect of New Accounting Principle in Period of Adoption | Accounting Standards Update 2016-02 [Member] $ 782       782 0
Net income 194,451       194,451  
Other comprehensive income $ 75,672         75,672
Issuance of common stock - stock option and other plans, shares 4,327   59,000      
Issuance of common stock - stock option and other plans, value $ 2,025   $ 2,025      
Issuance of common stock - restricted stock awards, net of canceled awards, shares     343,000      
Issuance of common stock - restricted stock awards, net of canceled awards, value 9,271   $ 9,271      
Activity in deferred compensation 3   $ 3      
Purchase and retirement of common stock, shares     (74,000)      
Purchase and retirement of common stock, value (2,792)   $ (2,792)      
Cash dividends declared on common stock $ (102,265)       (102,265)  
Purchase of treasury stock, shares 1,500,000   1,453,000      
Purchase of treasury stock, value $ (50,834)     $ (50,834)    
Balance, value at Dec. 31, 2019 $ 2,159,962 $ 0 $ 1,650,753 $ (50,834) $ 519,676 $ 40,367
Balance (in shares) at Dec. 31, 2019   0 72,124,000      
Common Stock, Dividends, Per Share, paid $ 1.40          
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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash Flows From Operating Activities      
Net income $ 194,451 $ 172,882 $ 112,828
Adjustments to reconcile net income to net cash provided by operating activities:      
Provision for loan and lease losses 3,493 14,769 8,631
Stock-based compensation expense 9,271 8,354 7,745
Depreciation, amortization and accretion 34,213 32,971 31,101
Investment securities loss (gain), net (2,132) 89 11
Net realized loss (gain) on sale of premises and equipment and loans held for investment (7,317) 316 (139)
Net loss (gain) on sale and valuation adjustments of OREO 602 (1,218) (495)
Gain on sale of merchant card services portfolio 0 0 (14,000)
Gain on bank owned life insurance death benefit (3,051) 0 (4,193)
Termination of FDIC loss share agreements charge 0 0 2,409
Originations of loans held for sale (210,484) (133,945) (133,460)
Proceeds from sale of loans held-for-sale 196,615 135,862 133,540
Deferred income tax expense 330 108 22,431
Net change in:      
Interest receivable (1,516) (4,442) (2,980)
Interest payable 632 164 131
Other assets (23,464) 2,176 (25,471)
Other liabilities 14,308 6,679 (10,554)
Net cash provided by operating activities 204,747 237,201 128,525
Cash Flows From Investing Activities      
Loans originated, net of principal collected (291,857) 2,069 (273,927)
Purchases of securities available for sale (1,196,895) (965,585) (355,607)
Purchases of loans held-for-investment (57,075) (46,969) 0
Purchases of premises and equipment (8,447) (11,328) (6,495)
Purchases of Federal Home Loan Bank stock (273,800) (197,440) (92,040)
Proceeds from FDIC for reimbursement on loss-sharing asset 0 0 26
Proceeds from sales of debt securities available for sale 259,554 32,330 30,403
Proceeds from sale of equity securities 0 4,808 0
Proceeds from principal repayments and maturities of securities available for sale 428,025 465,747 283,874
Proceeds from sales of premises and equipment and loans held for investment 8,634 16,030 12,422
Proceeds from sale of merchant card services portfolio 0 0 14,000
Proceeds from redemption of Federal Home Loan Bank Stock 251,640 181,920 98,924
Proceeds from sales of other real estate and other personal property owned 6,506 7,261 2,590
Proceeds from bank owned life insurance death benefit 8,265 5,074 10,745
Payment to FDIC to terminate loss-sharing agreements 0 0 (4,666)
Payments to FDIC related to loss-sharing asset 0 0 (210)
Net cash received in business combinations 0 0 80,472
Net cash used in investing activities (865,450) (506,083) (199,489)
Cash Flows From Financing Activities      
Net increase (decrease) in deposits 226,958 (73,591) 353,797
Net increase (decrease) in sweep repurchase agreements 3,343 7,035 (3,380)
Proceeds from exercise of stock options 2,025 1,857 1,980
Proceeds from Federal Home Loan Bank advances 6,845,000 4,936,000 2,301,000
Proceeds from Federal Reserve Bank borrowings 36,000 5,010 10
Proceeds from other borrowings 100 0 0
Payments for Federal Home Loan Bank advances (6,291,000) (4,548,000) (2,397,000)
Payments for Federal Reserve Bank borrowings (36,000) (5,010) (10)
Payments for other debt (100) 0 0
Payments for common stock dividends (101,911) (83,440) (51,308)
Repayment of junior subordinated debentures 0 8,248 6,186
Repayment of term repurchase agreement 0 (25,000) 0
Payments for cash settlement of acquired equity awards 0 0 (7,345)
Payments for purchase of treasury stock (50,834) 0 0
Payments for purchase and retirement of common stock 2,792 2,677 2,299
Net cash provided by financing activities 630,789 203,936 189,259
Increase (decrease) in cash and cash equivalents (29,914) (64,946) 118,295
Cash and cash equivalents at beginning of period 277,587 342,533 224,238
Supplemental Information:      
Cash paid for interest 35,916 18,066 6,626
Cash paid for income tax, net of refunds 47,375 24,067 59,071
Non-cash investing and financing activities:      
Loans transferred to OREO 386 1,200 106
Share-based consideration issued in business combinations 0 0 636,385
Premises and equipment expenditures incurred but not yet paid 451 195 0
Change in dividends payable on unvested shares included in other liabilities $ 354 $ 19 $ 0
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Summary of Significant Accounting Policies
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]  
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies and Reclassifications
Organization
Columbia Banking System, Inc. (the “Corporation,” “we,” “our,” “Columbia” or the “Company”) is the holding company for Columbia State Bank (“Columbia Bank” or the “Bank”) and Columbia Trust Company (“Columbia Trust”). The Bank provides a full range of financial services through 146 branch locations, including 71 in the State of Washington, 61 in Oregon and 14 in Idaho. Columbia Trust provides fiduciary, agency, trust and related services, and life insurance products. Because the Bank comprises substantially all of the business of the Corporation, references to the “Company” mean the Corporation, the Bank and Columbia Trust together. The Corporation is approved as a bank holding company pursuant to the Gramm-Leach-Bliley Act of 1999.
The Company’s accounting and reporting policies conform to GAAP and practices in the financial services industry. To prepare the financial statements in conformity with GAAP, management must make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements, and income and expenses during the reporting period. Circumstances and events that differ significantly from those underlying our estimates and assumptions could cause actual financial results to differ from our estimates. The most significant estimates included in the financial statements relate to the ALLL, business combinations and goodwill impairment.
The Company has applied its accounting policies and estimation methods consistently in all periods presented in these financial statements (to the periods in which they applied), with the exception of our lease accounting under ASC 842, which was adopted prospectively, beginning in 2019.
Consolidation
The Consolidated Financial Statements of the Company include the accounts of the Corporation and its subsidiaries, including the Bank and Columbia Trust. Intercompany balances and transactions have been eliminated in consolidation.
Cash and cash equivalents
Cash and cash equivalents include cash and due from banks, and interest-bearing balances due from correspondent banks and the FRB. Cash equivalents have a maturity of 90 days or less at the time of purchase.
Securities
Securities are classified based on management’s intention on the date of purchase. All securities are classified as available for sale and are presented at fair value. Unrealized gains or losses on securities available for sale are excluded from net income but are included as separate components of other comprehensive income, net of taxes. Purchase premiums or discounts on securities available for sale are amortized or accreted into income using the interest method over the terms of the individual securities. The Company performs a quarterly assessment to determine whether a decline in fair value below amortized cost is other-than-temporary. Amortized cost includes adjustments made to the cost of an investment for accretion, amortization, collection of cash and previous other-than-temporary impairment recognized in earnings. Other-than-temporary impairment exists when it is more likely than not that the Company will be unable to recover the entire amortized cost basis of the security.
In performing the quarterly assessment for debt securities, management considers whether or not the Company expects to recover the entire amortized cost basis of the security. In addition, management also considers whether it is more likely than not that it will not have to sell the security before recovery of its cost basis. If the Company intends to sell a security or it is more likely than not it will be required to sell a security prior to recovery of its cost basis, the entire amount of impairment is recognized in earnings. If the Company does not intend to sell the security or it is not more likely than not it will be required to sell the security prior to recovery of its cost basis, the credit loss component of impairment is recognized in earnings and impairment associated with non-credit factors, such as market liquidity, is recognized in “Other comprehensive income (loss), net of tax.” A credit loss is the difference between the cost basis of the security and the present value of cash flows expected to be collected, discounted at the security’s effective interest rate at the date of acquisition. The cost basis of an other-than-temporarily impaired security is written down by the amount of impairment recognized in earnings. The new cost basis is not adjusted for subsequent recoveries in fair value. However, the difference between the new amortized cost basis and the cash flows expected to be collected is accreted as interest income. The total other-than-temporary impairment, if any, is presented in the Consolidated Statements of Income with a reduction for the amount of other-than-temporary impairment that is recognized in “Other Comprehensive Income,” if any.
Realized gains or losses on sales of securities available for sale are recorded using the specific identification method.
Federal Home Loan Bank Stock
The Company holds shares of Class B stock issued by the FHLB, which has been designated as FHLB membership stock or FHLB activity based stock in accordance with the capital plan of the FHLB. Membership stock is stock we are required to purchase and hold as a condition of membership in the FHLB. The Company’s membership stock purchase requirement is measured as a percentage of our year end assets, subject to a $10 million cap. Class B stock may be redeemed, subject to certain limitations, on five years’ written notice to the FHLB. Activity based stock is stock we are required to purchase and hold in order to obtain an advance or participate in FHLB mortgage programs. The Company’s activity based stock purchase requirement is measured as a percentage of our advance proceeds. Our FHLB stock is carried at par value because the shares are issued, transferred, redeemed, and repurchased by the FHLB at a par value of $100. The FHLB stock is subject to recoverability testing per the Financial Services-Depository and Lending topic of the FASB ASC.
Loans held for sale
Mortgage loans held for sale are carried at the lower of amortized cost or fair value. Due to the short period of time between the origination and sale, the carrying amount of loans held for sale approximates the fair values.
Loans
Loans, excluding PCI loans, are generally carried at the unpaid principal balance, net of purchase premiums, purchase discounts and net deferred loan fees. Net deferred loan fees include nonrefundable loan origination fees less direct loan origination costs. Net deferred loan fees, purchase premiums and purchase discounts are amortized into interest income using either the interest method or straight-line method over the terms of the loans, adjusted for actual prepayments. The interest method is used for all loans except revolving loans, for which the straight-line method is used. Interest income is accrued as earned. Fees related to lending activities, other than the origination or purchase of loans, are recognized as noninterest income during the period the related services are performed.
Nonaccrual loans—Loans are placed on nonaccrual status when a loan becomes contractually past due 90 days with respect to interest or principal unless the loan is both well secured and in the process of collection, or if full collection of interest or principal becomes uncertain. When a loan is placed on nonaccrual status, any accrued and unpaid interest receivable is reversed and the amortization of net deferred loan fees, premiums and discounts ceases. The interest payments received on nonaccrual loans are generally accounted for on the cost-recovery method whereby the interest payment is applied to the principal balances. Loans may be returned to accrual status when improvements in credit quality eliminate the doubt as to the full collectability of both interest and principal and a period of sustained performance has occurred.
Impaired loans—Loans are considered impaired when based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement or when a loan has been modified in a TDR. The assessment for impairment occurs when and while such loans are designated as classified per the Company’s internal risk rating system or when and while such loans are on nonaccrual. All nonaccrual loans greater than $500,000 and all TDR loans are considered impaired and analyzed individually on a quarterly basis. Classified loans with an outstanding balance greater than $500,000 are evaluated for potential impairment on a quarterly basis.
Restructured Loans—A loan is classified as a TDR when a borrower is experiencing financial difficulties that lead to a restructuring of the loan, and the Company grants concessions to the borrower in the restructuring that it would not otherwise consider. These concessions may include interest rate reductions, principal forgiveness, extension of maturity date and other actions intended to minimize potential losses. Generally, a nonaccrual loan that is restructured remains on nonaccrual status for a period of six months to demonstrate that the borrower can meet the restructured terms. If the borrower’s performance under the new terms is not reasonably assured, the loan remains classified as a nonaccrual loan.
Purchased Credit Impaired Loans—Loans acquired with evidence of credit deterioration since origination for which it is probable that all contractually required payments will not be collected are accounted for under ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. In addition, because of the significant discounts associated with certain of the acquired loan portfolios, the Company elected to account for those certain acquired loans under ASC 310-30.
In situations where such loans have similar risk characteristics, loans are aggregated into pools to estimate cash flows. A pool is accounted for as a single asset with a single interest rate, cumulative loss rate and cash flow expectation. Expected cash flows at the acquisition date in excess of the fair value of loans are considered to be accretable yield, which is recognized as interest income over the life of the loan pool using a level yield method if the timing and amount of the future cash flows of the pool is reasonably estimable. Subsequent to the acquisition date, any increases in cash flow over those expected at purchase date in excess of fair value are recorded as interest income prospectively. Any subsequent decreases in cash flow over those expected at purchase date due to credit deterioration are recognized by recording an ALLL on PCI loans. Any disposals of loans, including sales of loans, payments in full or foreclosures result in the removal of the loan from the loan pool at the carrying amount.
Unfunded loan commitments—Unfunded commitments are generally related to providing credit facilities to clients of the Bank and are not actively traded financial instruments. These unfunded commitments are disclosed as financial instruments with off-balance sheet risk in Note 18, “Commitments and Contingent Liabilities.”
Allowance for Loan and Lease Losses
The ALLL is an accounting estimate of incurred credit losses in our loan portfolio at the balance sheet date. The provision for loan and lease losses is the expense recognized in the Consolidated Statements of Income to adjust the allowance to the levels deemed appropriate by management, as measured by the Company’s credit loss estimation methodologies.
Loans Collectively Evaluated for Impairment—This measure of estimated credit losses is based upon the loss experience over a historical base period adjusted for a loss emergence period. The loss emergence period is an estimate of the period that it takes, on average, for us to identify the amount of loss incurred for a loan that has suffered a loss-causing event. Management then considers the effects of the following qualitative factors to ensure our allowance reflects the inherent losses in the loan portfolio:
•
Economic and business conditions;
•
Concentration of credit;
•
Lending management and staff;
•
Lending policies and procedures;
•
Loss and recovery trends;
•
Nature and volume of the portfolio;
•
Trends in problem loans, loan delinquencies and nonaccrual loans;
•
Quality of internal loan review; and
•
External factors.
These qualitative factors have a high degree of subjectivity and changes in any of the factors could have a significant impact on our calculation of the allowance. The qualitative adjustment by loan segment is based upon management's assessment of inherent losses within a range between the weighted historical loss factor by segment and the maximum consecutive quarterly losses in the relevant loss emergence period by segment over the historical base period.
Loan and lease losses are charged against the allowance when management believes the collectability of a loan balance is unlikely. Subsequent recoveries, if any, are credited to the allowance.
Loans Individually Evaluated for Impairment—This measure of estimated credit losses begins if, based upon current information and events, we believe it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement or when a loan has been modified in a TDR. When a loan has been identified as impaired, the amount of impairment will be measured using discounted cash flows, except when it is determined that the remaining source of repayment for the loan is the operation or liquidation of the underlying collateral. In these cases, the current fair value of the collateral, reduced by costs to sell, will be used in place of discounted cash flows. As a final alternative, the observable market price of the loan may be used to assess impairment. The Company predominately uses the fair value of collateral approach based upon a reliable valuation. When the measurement of the impaired loan is less than the recorded amount of the loan, an impairment is recognized by recording a charge-off to the allowance or by designating a specific reserve.
Purchased Credit Impaired Loans—The Company updates its cash flow projections for PCI loans accounted for under ASC 310-30 on a quarterly basis. Assumptions utilized in this process include projections related to probability of default, loss severity, prepayment and recovery lag. Projections related to probability of default and prepayment are calculated utilizing a loan migration analysis. The loan migration analysis is a matrix of probability that is used to estimate the probability of a loan pool transitioning into a particular delinquency state given its delinquency state at the re-measurement date. Loss severity factors are based upon either actual charge-off data within the loan pools or industry averages, and recovery lags are based upon the collateral within the loan pools.
Any decreases in expected cash flows after the acquisition date and subsequent measurement periods are recognized by recording a provision for loan losses. See “Purchased Credit Impaired Loans” under “Loans” for further discussion.
Unfunded Commitments and Letters of Credit—The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to these unfunded credit facilities. The determination of the adequacy of the allowance is based on periodic evaluations of the unfunded credit facilities including an assessment of the probability of commitment usage, credit risk factors for loans outstanding to these same customers, and the terms and expiration dates of the unfunded credit facilities. The allowance for unfunded commitments is included in “Other liabilities” on the Consolidated Balance Sheets, with changes to the balance charged against noninterest expense.
Adoption of Allowance for Credit Losses - ASC 326
In accordance with ASU 2016-13, the Company was required to adopt ASC 326 as of January 1, 2020. The allowance for credit losses under ASC 326 is an accounting estimate of expected losses over the contractual life of assets carried at amortized cost within the Company’s loan portfolio at the balance sheet date. The ASU requires a financial asset (or group of financial assets) measured at amortized cost to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset to present the net carrying value at the amount expected to be collected on the financial asset.
The quantitative allowance is calculated using a discounted cash flow approach with a probability of default methodology. The probability of default is an assumption derived from regression models which determines the relationship between historical defaults and certain economic variables. The Company determines a reasonable and supportable forecast and applies that forecast to the model to determine defaults over the forecast period. Following the forecast period, the economic variables used to calculate the probability of default revert to a historical average. Other assumptions relevant to the discounted cash flow model to derive the quantitative allowance include the loss given default, which is the estimate of loss for a defaulted loan, and the discount rate applied to future cash flows. The model calculates the net present value of each loan using both the contractual and expected cash flows, respectively.
In addition to the quantitative portion of the allowance for credit losses, the Company also considers the effects of the following qualitative factors in its calculation of expected losses in the loan portfolio:
•
Economic and business conditions;
•
Concentration of credit;
•
Lending management and staff;
•
Lending policies and procedures;
•
Loss and recovery trends;
•
Nature and volume of the portfolio;
•
Trends in problem loans, loan delinquencies and nonaccrual loans;
•
Quality of internal loan review; and
•
External factors.
These qualitative factors are based in quantitative factors but also include a high degree of subjectivity and changes in any of the factors could have a significant impact on our calculation of the allowance.
Loans for which repayment is expected to be provided substantially through the operation or sale of collateral are considered collateral-dependent. The allowance for credit losses for collateral-dependent loans is measured on the basis of the fair value of the collateral when foreclosure is probable.
Premises and Equipment
Land, buildings, leasehold improvements and equipment are stated at cost less accumulated depreciation and amortization. Gains or losses on dispositions are reflected in current operations. Expenditures for improvements and major renewals are capitalized, and ordinary maintenance, repairs and small purchases are charged to “Occupancy” expense in the Consolidated Statements of Income. Depreciation and amortization are computed based on the straight-line method over the estimated useful lives of the various classes of assets. The ranges of useful lives for the principal classes of assets are as follows:
Buildings and building improvements
5 to 39 years
Leasehold improvements
Term of lease or useful life, whichever is shorter
Furniture, fixtures and equipment
3 to 7 years
Vehicles
5 years
Computer software
3 to 5 years

Software
Capitalized software is stated at cost, less accumulated amortization. Amortization is computed on a straight-line basis and charged to expense over the estimated useful life of the software, which is generally three years. Capitalized software is included in “Premises and equipment, net” in the Consolidated Balance Sheets.
Implementation Costs in a Cloud Computing Arrangement
Implementation costs incurred in a hosting arrangement that is a service contract are capitalized based on criteria in ASC 350-40. The capitalized costs are expensed over the term of the hosting arrangement. Capitalized implementation costs in a cloud computing arrangement are included in “Other assets” in the Consolidated Balance Sheets.
Other Real Estate Owned
OREO is composed of real estate acquired by the Company through either foreclosure or deed in lieu of foreclosure in satisfaction of debt. At acquisition, OREO is recorded at fair value less estimated costs to sell. Any fair value adjustments at acquisition are charged to the allowance, or in the event of a write-up without previous losses charged to the allowance, a credit to earnings is recorded. The fair value of the OREO is based upon a current appraisal or a letter of intent to purchase. Losses that result from the ongoing periodic valuation of these properties are charged to the net cost of operation of OREO in the period in which they are identified. Improvements to OREO are capitalized and holding costs are charged to the net cost of operation of OREO as incurred.
Goodwill and Intangibles
Net assets of companies acquired in a business combination are recorded at fair value at the date of acquisition. Any excess of the purchase price over the fair value of net assets acquired, including identified intangible assets, is recognized as goodwill. Goodwill is reviewed for potential impairment annually, during the third quarter, or, more frequently, if events or circumstances indicate a potential impairment, at the reporting unit level. A reporting unit is an operating segment or one level below an operating segment for which discrete financial information is available and regularly reviewed by management. The Company consists of a single reporting unit. If the fair value of the reporting unit, including goodwill, is determined to be less than the carrying amount of the reporting unit, a further test is required to measure the amount of impairment. If an impairment loss exists, the carrying amount of goodwill is adjusted to a new cost basis. Subsequent reversal of a previously recognized goodwill impairment loss is prohibited.
Identified intangible assets are amortized on an accelerated basis over the period benefited. Intangible assets are also evaluated for impairment if events and circumstances indicate a possible impairment. Such evaluation is based on undiscounted cash flow projections. At December 31, 2019, intangible assets included in the Consolidated Balance Sheets principally consisted of CDI with an original estimated life of 10 years.
Leases
The Company determines if a lease is present at the inception of an agreement. Operating leases are capitalized at commencement and are discounted using the Company’s FHLB borrowing rate for a similar term borrowing unless the lease defines an implicit rate within the contract. Leases with original terms of less than 12 months are not capitalized. For operating leases existing prior to January 1, 2019, the rate for the remaining lease term as of January 1, 2019 was used. Right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Operating lease right-of-use assets and operating lease liabilities are recognized on the lease commencement date based on the present value of lease payments over the lease term. The lease term includes options to extend or terminate the lease if the Company is reasonably certain that an option will be exercised. Operating leases are included within “Other assets” in the Consolidated Balance Sheets. See Note 10, “Leases” for additional information on leases.
Income Taxes
The provision for income taxes includes current and deferred income tax expense on net income adjusted for temporary and permanent differences such as interest income from state and municipal securities and investments in affordable housing tax credits. Deferred tax assets and liabilities are recognized for the expected future tax consequences of existing temporary differences between the financial reporting and tax reporting basis of assets and liabilities using enacted tax laws and rates. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. On a quarterly basis, management evaluates deferred tax assets to determine if these tax benefits are expected to be realized in future periods. This determination is based on facts and circumstances, including the Company’s current and future tax outlook. To the extent a deferred tax asset is no longer considered “more likely than not” to be realized, a valuation allowance is established.
We recognize the tax benefit from uncertain tax positions only if it is more likely than not that the tax positions will be sustained on examination by the tax authorities, based on the technical merits of the position. The tax benefit is measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. We recognize interest and penalties related to unrecognized tax benefits in “Provision for income taxes” in the Consolidated Statements of Income.
Advertising
Advertising costs are generally expensed as incurred.
Earnings per Common Share
The Company’s capital structure includes common shares, restricted common share awards, common share options, and, during a portion of 2017, convertible preferred shares. Restricted common share awards participate in dividends declared on common shares at the same rate as common shares. Convertible preferred shares participated in dividends declared on common shares on an “as if converted” basis. Restricted common share awards and convertible preferred shares are considered participating securities under the EPS topic of the FASB ASC.
The Company calculates EPS using the two-class method. The two-class method is an earnings allocation formula that treats a participating security as having rights to earnings that otherwise would have been available to common shareholders but does not require the presentation of basic and diluted EPS for securities other than common shares. Under the two-class method, basic EPS is computed by dividing earnings allocated to common shareholders by the weighted average number of common shares outstanding for the period. Earnings allocated to common shareholders represents net income reduced by earnings allocated to participating securities. Diluted EPS is computed in the same manner as basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding if certain shares issuable upon exercise of common share options were included unless those additional shares would have been anti-dilutive. For the diluted EPS computation, the treasury stock method is applied and compared to the two-class method and whichever method results in a more dilutive impact is utilized to calculate diluted EPS.
Share-Based Payment
The Company accounts for stock options and stock awards in accordance with the Compensation—Stock Compensation topic of the FASB ASC. Authoritative guidance requires the Company to measure the cost of employee services received in exchange for an award of equity instruments, such as stock options or stock awards, based on the fair value of the award on the grant date. This cost must be recognized in the Consolidated Statements of Income over the vesting period of the award.
The Company issues restricted common share awards which generally vest over a four-year period and have full voting rights. Pursuant to our new equity incentive plan approved in 2018, for any awards issued under the new plan, the holder accrues dividends, which are paid out when the shares vest. For any awards granted prior to the new plan, the holder receives dividends whether or not the shares have vested. Restricted stock is valued at the closing price of the Company’s stock on the date of an award.
Derivatives and Hedging Activities
In accordance with the Derivatives and Hedging topic of the FASB ASC, the Company recognizes derivatives as assets or liabilities on the Consolidated Balance Sheets at their fair value. The Company periodically enters into interest rate contracts with customers and offsetting contracts with third parties. As these interest rate contracts are not designated as hedges under the Derivatives and Hedging topic of the FASB ASC, the changes in fair value of these instruments are recognized immediately in earnings.
As part of the Company’s overall interest rate risk management, the Company uses an interest rate collar with a notional amount of $500.0 million to mitigate interest rate risk. This collar is designated and qualifies as a cash flow hedge. Gains and losses are recorded in accumulated other comprehensive income to the extent the hedge is effective. Gains and losses are reclassified from accumulated other comprehensive income to earnings in the period the hedged transaction affects earnings and are included in the same income statement line item that the hedged transaction is recorded.
Accounting Pronouncements Recently Adopted or Issued
Accounting Standards Adopted in 2019
In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The amendments included in this ASU create a new accounting model for both lessees and lessors. The new guidance requires lessees to recognize lease liabilities, initially measured at the present value of future lease payments, and corresponding right-of-use assets for all leases with lease terms greater than 12 months. The new lease model differs from the old lease accounting model, as the old model does not require such lease liabilities and corresponding right-of-use assets to be recorded for operating leases. The amendments in ASU 2016-02 must be adopted using the modified retrospective approach and will be effective for the first interim or annual period beginning after December 15, 2018. The FASB subsequently issued ASU 2018-11, which allows for an additional (optional) transition method. The Company adopted the new standard effective January 1, 2019 utilizing the transition method allowed under ASU 2018-11 and did not restate comparative periods. The Company elected the package of practical expedients permitted under the transition guidance, which allowed us to carryforward our historical lease classifications and our assessment on whether a contract is or contains a lease. We also elected to keep leases with an initial term of 12 months or less off the balance sheet. The adoption of the new standard resulted in an increase in other assets and an increase in other liabilities of $49.2 million and $48.2 million, respectively. The Company recognized a cumulative effect adjustment of $782 thousand to increase the beginning balance of retained earnings related to previous deferred gains on sale-leaseback transactions.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments also require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement, including reasonably certain renewal periods. The amendments in ASU 2018-15 are effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The amendments can be adopted on a prospective or retrospective basis. The Company adopted the new standard effective July 1, 2019 on a prospective basis. The adoption of the new standard resulted in an increase in other assets of $1.5 million.
Recently Issued Accounting Standards, Not Yet Adopted
In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes. The guidance issued in this update simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. This ASU also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The ASU is effective for interim and annual reporting periods beginning after December 15, 2020; early adoption is permitted. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial statements.
In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. The amendments in this ASU clarify certain aspects of accounting for credit losses, hedging activities, and financial instruments (addressed by ASUs 2016-01, 2016-13, and 2017-12). Many of the amendments reflect decisions reached at FASB meetings or meetings of the Board’s credit losses transition resource group. Topics covered in this ASU include: accrued interest, transfers between classifications or categories for loans and debt securities, recoveries, reinsurance recoverables, projections of interest rate environments for variable-rate financial instruments, costs to sell when foreclosure is probable, consideration of expected prepayments when determining the effective interest rate, vintage disclosures, extension and renewal options, etc.
In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments. The amendments included in this ASU require an entity to reflect its current estimate of all expected credit losses for assets held at an amortized cost basis. For available for sale debt securities, credit losses will be measured in a manner similar to current GAAP, however, this ASU requires that credit losses be presented as an allowance rather than as a write-down. In November 2019, the FASB subsequently issued ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. The amendments in the Update require entities to include expected recoveries of the amortized cost basis previously written-off or expected to be written-off in the valuation account for purchased financial assets with credit deterioration. In addition, the amendments in this Update clarify and improve various aspects of the guidance for ASU 2016-13.
Unlike the incurred loss models, the CECL model in ASU 2016-13 does not specify a threshold for the recognition of an impairment allowance. Rather, the Company recognizes an impairment allowance equal to its estimate of lifetime expected credit losses, adjusted for prepayments, for in-scope financial instruments. Accordingly, the impairment allowance measured under the CECL model may change significantly from the impairment allowance measured under the Company’s incurred loss model. The Company engaged a third-party vendor to assist in the CECL calculation and has developed and implemented an internal governance framework. The amendments in ASU 2016-13 and the above ASUs related to Credit Losses are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption was permitted, including adoption in any interim period. The Company adopted the new standards, using a modified retrospective approach, effective January 1, 2020, which resulted in an increase of $1.6 million to its allowance for credit losses, an increase of $1.6 million to its allowance for unfunded commitments and letters of credit and a net-of-tax cumulative-effect adjustment of $2.5 million to decrease the beginning balance of retained earnings.
In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This ASU adds, eliminates and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. The ASU is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the added disclosure requirements until their effective date. The Company adopted the new standard effective January 1, 2020. As the ASU only revised disclosure requirements, adoption of this ASU did not have a material impact on the Company’s consolidated financial statements.
Certain amounts reported in prior periods have been reclassified in the Consolidated Financial Statements to conform to the current presentation. The reclassifications have no effect on net income or stockholders’ equity as previously reported.
v3.19.3.a.u2
Business Combinations
 12 Months Ended
Dec. 31, 2019
Business Acquisition [Line Items]  
Business Combination Disclosure [Text Block] Business Combinations
Pacific Continental
On November 1, 2017, the Company completed its acquisition of Pacific Continental and its wholly-owned banking subsidiary Pacific Continental Bank. The Company acquired 100% of the equity interests of Pacific Continental. The primary reasons for the acquisition were to expand in the Eugene, Oregon market and improve branch network efficiencies in the Seattle and Portland markets.
The assets acquired and liabilities assumed have been accounted for under the acquisition method of accounting. The assets and liabilities, both tangible and intangible, were recorded at their fair values as of the November 1, 2017 acquisition date. The application of the acquisition method of accounting resulted in the recognition of goodwill of $383.1 million and a CDI of $46.9 million. The goodwill represents the excess of the purchase price over the fair value of the net assets acquired. The goodwill is not deductible for income tax purposes.
The table below summarizes the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed:
 
 
November 1, 2017
 
 
(in thousands)
Merger consideration
 
 
 
$
637,103

Identifiable net assets acquired, at fair value
 
 
 
 
Assets acquired
 
 
 
 
Cash and cash equivalents
 
$
81,190

 
 
Investment securities
 
449,291

 
 
FHLB stock
 
7,084

 
 
Loans
 
1,873,987

 
 
Interest receivable
 
7,827

 
 
Premises and equipment
 
27,343

 
 
OREO
 
10,279

 
 
CDI
 
46,875

 
 
Other assets
 
50,638

 
 
Total assets acquired
 
 
 
2,554,514

Liabilities assumed
 
 
 
 
Deposits
 
(2,118,982
)
 
 
FHLB advances
 
(101,127
)
 
 
Subordinated debentures
 
(35,678
)
 
 
Junior subordinated debentures
 
(14,434
)
 
 
Securities sold under agreements to repurchase
 
(1,617
)
 
 
Other liabilities
 
(28,653
)
 
 
Total liabilities assumed
 
 
 
(2,300,491
)
Total fair value of identifiable net assets
 
 
 
254,023

Goodwill
 
 
 
$
383,080


See Note 9, “Goodwill and Other Intangible Assets,” for further discussion of the accounting for goodwill and other intangible assets.
The operating results of the Company reported herein include the operating results produced by the acquired assets and assumed liabilities for the period November 1, 2017 to December 31, 2019. Disclosure of the amount of Pacific Continental’s revenue and net income (excluding integration costs) included in Columbia’s Consolidated Statements of Income is impracticable due to the integration of the operations and accounting for this acquisition.
For illustrative purposes only, the following table presents certain unaudited pro forma information for the year ended December 31, 2017. This unaudited, estimated pro forma financial information was calculated as if Pacific Continental had been acquired as of the beginning of the year prior to the date of acquisition. This unaudited pro forma information combines the historical results of Pacific Continental 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 acquisition occurred as of the beginning of the year prior to the acquisition. In particular, no adjustments have been made to eliminate the impact of other-than-temporary impairment losses and losses recognized on the sale of securities that may not have been necessary had the investment securities been recorded at fair value as of the beginning of the year prior to the date of acquisition. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value. Additionally, Columbia expects to achieve further operating cost savings and other business synergies, including revenue growth as a result of the acquisition, which are not reflected in the pro forma amounts that follow. As a result, actual amounts would have differed from the unaudited pro forma information presented.
 
 
Unaudited Pro Forma for the
 
 
Year Ended December 31,
 
 
2017
 
 
(in thousands, except per share amounts)
Total revenues (net interest income plus noninterest income)
 
$
571,944

Net income
 
$
149,859

EPS - basic
 
$
2.23

EPS - diluted
 
$
2.23


The following table shows the impact of the acquisition-related expenses related to the acquisition of Pacific Continental for the periods indicated to the various components of noninterest expense:
 
 
Years ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Noninterest Expense
 
 
 
 
 
 
Compensation and employee benefits
 
$
—

 
$
3,620

 
$
8,014

Occupancy
 
—

 
1,619

 
1,912

Data processing
 
—

 
963

 
1,555

Legal and professional fees
 
—

 
1,028

 
4,618

Advertising and promotion
 
—

 
537

 
467

Other
 
—

 
894

 
630

Total impact of acquisition-related costs to noninterest expense
 
$
—

 
$
8,661

 
$
17,196
v3.19.3.a.u2
Cash and Cash Equivalents
 12 Months Ended
Dec. 31, 2019
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents Cash and Cash Equivalents
The Company is required to maintain an average reserve balance with the FRB or maintain such reserve balance in the form of cash. The average required reserve balance for the years ended December 31, 2019 and 2018 was approximately $84.9 million and $110.2 million, respectively, and was met by holding cash and maintaining an average balance with the FRB.
v3.19.3.a.u2
Securities
 12 Months Ended
Dec. 31, 2019
Debt Securities, Available-for-sale [Abstract]  
Securities
Securities
At December 31, 2019, the Company’s securities portfolio primarily consisted of securities issued by the U.S. government, U.S. government agencies, U.S. government-sponsored enterprises and state and municipalities. All of the Company’s mortgage-backed securities and collateralized mortgage obligations are issued by U.S. government agencies and U.S. government-sponsored enterprises and are implicitly guaranteed by the U.S. government. The Company had no other issuances in its portfolio which exceeded ten percent of shareholders’ equity.
The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of debt securities available for sale:
 
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair Value
December 31, 2019
 
(in thousands)
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
2,864,949

 
$
47,223

 
$
(19,222
)
 
$
2,892,950

Other asset-backed securities (1)
 
194,563

 
2,476

 
(989
)
 
196,050

State and municipal securities
 
478,366

 
10,660

 
(224
)
 
488,802

U.S. government agency and government-sponsored enterprise securities
 
165,218

 
3,127

 
(5
)
 
168,340

Total
 
$
3,703,096

 
$
63,486

 
$
(20,440
)
 
$
3,746,142

December 31, 2018
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
2,045,728

 
$
8,473

 
$
(40,846
)
 
$
2,013,355

Other asset-backed securities (1)
 
176,793

 
763

 
(2,621
)
 
174,935

State and municipal securities
 
579,755

 
2,328

 
(7,760
)
 
574,323

U.S. government agency and government-sponsored enterprise securities
 
408,088

 
1,235

 
(4,736
)
 
404,587

U.S. government securities
 
251

 
—

 
(3
)
 
248

Total
 
$
3,210,615

 
$
12,799

 
$
(55,966
)
 
$
3,167,448


__________
(1) Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
The following table provides the proceeds and both gross realized gains and losses on the sales and calls of debt securities available for sale as well as other securities gains and losses for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Proceeds from sales and calls of debt securities available for sale
 
$
259,554

 
$
32,330

 
$
30,403

 
 
 
 
 
 
 
Gross realized gains from sales of debt securities available for sale
 
$
3,357

 
$
235

 
$
111

Gross realized losses from sales of debt securities available for sale
 
(1,225
)
 
(129
)
 
(122
)
Other securities losses, net (1)
 
—

 
(195
)
 
—

Investment securities gains (losses), net
 
$
2,132

 
$
(89
)
 
$
(11
)
__________
(1) Other securities losses, net includes net unrealized loss activity associated with equity securities.
The scheduled contractual maturities of debt securities available for sale at December 31, 2019 are presented as follows:
 
 
December 31, 2019
 
 
Amortized Cost
 
Fair Value
 
 
(in thousands)
Due within one year
 
$
77,363

 
$
77,538

Due after one year through five years
 
416,556

 
421,363

Due after five years through ten years
 
2,007,225

 
2,041,751

Due after ten years
 
1,201,952

 
1,205,490

Total debt securities available for sale
 
$
3,703,096

 
$
3,746,142

The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
To secure public funds
 
$
323,055

 
$
276,343

To secure borrowings
 
111,488

 
52,303

Other securities pledged
 
154,030

 
138,492

Total securities pledged as collateral
 
$
588,573

 
$
467,138


The following tables show the gross unrealized losses and fair value of the Company’s debt securities available for sale with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2019 and 2018:
 
 
Less than 12 Months
 
12 Months or More
 
Total
 
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
December 31, 2019
 
(in thousands)
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
1,055,903

 
$
(12,424
)
 
$
491,539

 
$
(6,798
)
 
$
1,547,442

 
(19,222
)
Other asset-backed securities (1)
 
89,508

 
(880
)
 
6,799

 
(109
)
 
96,307

 
(989
)
State and municipal securities
 
12,363

 
(142
)
 
12,587

 
(82
)
 
24,950

 
(224
)
U.S. government agency and government-sponsored enterprise securities
 
—

 
—

 
10,495

 
(5
)
 
10,495

 
(5
)
Total
 
$
1,157,774

 
$
(13,446
)
 
$
521,420

 
$
(6,994
)
 
$
1,679,194

 
$
(20,440
)
December 31, 2018
 
 
 
 
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
114,551

 
$
(750
)
 
$
1,207,020

 
$
(40,096
)
 
$
1,321,571

 
$
(40,846
)
Other asset-backed securities (1)
 
40,071

 
(222
)
 
94,367

 
(2,399
)
 
134,438

 
(2,621
)
State and municipal securities
 
106,292

 
(581
)
 
280,496

 
(7,179
)
 
386,788

 
(7,760
)
U.S. government agency and government-sponsored enterprise securities
 
15,392

 
(45
)
 
291,435

 
(4,691
)
 
306,827

 
(4,736
)
U.S. government securities
 
—

 
—

 
247

 
(3
)
 
247

 
(3
)
Total
 
$
276,306

 
$
(1,598
)
 
$
1,873,565

 
$
(54,368
)
 
$
2,149,871

 
$
(55,966
)
__________
(1) Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
At December 31, 2019, there were 243 U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligation securities in an unrealized loss position, of which 162 were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at December 31, 2019.
At December 31, 2019, there were 18 other asset-backed securities in an unrealized loss position, of which six were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at December 31, 2019.
At December 31, 2019, there were 24 state and municipal government securities in an unrealized loss position, of which 14 were in a continuous loss position for 12 months or more. The unrealized losses on state and municipal securities were caused by interest rate changes or widening of market spreads subsequent to the purchase of the individual securities. Management monitors published credit ratings of these securities for adverse changes. As of December 31, 2019, none of the rated obligations of state and local government entities held by the Company had a below investment grade credit rating. Because the credit quality of these securities is investment grade and the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at December 31, 2019.
At December 31, 2019, there were three U.S. government agency and government-sponsored enterprise securities in an unrealized loss position, all of which were in a continuous loss position for 12 months or more. The decline in fair value is attributable to changes in interest rates relative to where these investments fall within the yield curve and their individual characteristics. Because the Company does not currently intend to sell these securities nor does the Company consider it more likely than not that it will be required to sell these securities before the recovery of amortized cost basis, which may be upon maturity, the Company does not consider these investments to be other-than-temporarily impaired at December 31, 2019.
At December 31, 2019, there were no U.S. government securities in an unrealized loss position.
v3.19.3.a.u2
Loans
 12 Months Ended
Dec. 31, 2019
Loans and Leases Receivable, Net Amount [Abstract]  
Financing Receivables [Text Block]
Loans
The Company’s loan portfolio includes originated and purchased loans. Originated loans and purchased loans for which there was no evidence of credit deterioration at their acquisition date and it was probable that we would be able to collect all contractually required payments are referred to collectively as loans, excluding PCI loans. Purchased loans for which there was, at acquisition date, evidence of credit deterioration since their origination and it was probable that we would be unable to collect all contractually required payments are referred to as PCI loans.
The following is an analysis of the loan portfolio by segment (net of unearned income):
 
 
December 31,
 
 
2019
 
2018
 
 
Loans, excluding PCI loans
 
PCI Loans
 
Total
 
Loans, excluding PCI loans
 
PCI Loans
 
Total
 
 
(in thousands)
Commercial business
 
$
3,602,597

 
$
7,863

 
$
3,610,460

 
$
3,438,422

 
$
9,240

 
$
3,447,662

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
265,144

 
7,203

 
272,347

 
238,367

 
8,017

 
246,384

Commercial and multifamily residential
 
4,183,961

 
54,212

 
4,238,173

 
3,846,027

 
62,910

 
3,908,937

Total real estate
 
4,449,105

 
61,415

 
4,510,520

 
4,084,394

 
70,927

 
4,155,321

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
192,762

 
—

 
192,762

 
217,790

 
153

 
217,943

Commercial and multifamily residential
 
163,103

 
—

 
163,103

 
284,394

 
534

 
284,928

Total real estate construction
 
355,865

 
—

 
355,865

 
502,184

 
687

 
502,871

Consumer
 
292,697

 
8,238

 
300,935

 
318,945

 
8,906

 
327,851

Less: Net unearned income
 
(34,315
)
 
—

 
(34,315
)
 
(42,194
)
 
—

 
(42,194
)
Total loans, net of unearned income
 
8,665,949

 
77,516

 
8,743,465

 
8,301,751

 
89,760

 
8,391,511

Less: ALLL
 
(81,124
)
 
(2,844
)
 
(83,968
)
 
(79,758
)
 
(3,611
)
 
(83,369
)
Total loans, net
 
$
8,584,825

 
$
74,672

 
$
8,659,497

 
$
8,221,993

 
$
86,149

 
$
8,308,142

Loans held for sale
 
$
17,718

 
$
—

 
$
17,718

 
$
3,849

 
$
—

 
$
3,849


At December 31, 2019 and 2018, the Company had no material foreign activities. Substantially all of the Company’s loans and unfunded commitments are geographically concentrated in its service areas within the states of Washington, Oregon and Idaho.
At December 31, 2019 and 2018, $3.24 billion and $3.22 billion, respectively, of commercial and residential real estate loans were pledged as collateral on FHLB advances. The Company has also pledged $151.3 million and $82.0 million of commercial loans to the FRB for additional borrowing capacity at December 31, 2019 and 2018, respectively.
Nonaccrual loans totaled $33.1 million and $54.8 million at December 31, 2019 and 2018, respectively. The amount of interest income foregone as a result of these loans being placed on nonaccrual status totaled $2.0 million for 2019, $3.6 million for 2018 and $2.4 million for 2017. There were no loans 90 days past due and still accruing interest as of December 31, 2019 and 2018. At December 31, 2019 and 2018, there were $2.0 million and $2.1 million, respectively, of commitments of additional funds for loans accounted for on a nonaccrual basis.
The following is an analysis of nonaccrual loans as of December 31, 2019 and 2018:
 
 
December 31,
 
 
2019
 
2018
 
 
Recorded
Investment
Nonaccrual
Loans
 
Unpaid Principal
Balance
Nonaccrual
Loans
 
Recorded
Investment
Nonaccrual
Loans
 
Unpaid Principal
Balance
Nonaccrual
Loans
 
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
Secured
 
$
26,615

 
$
38,278

 
$
35,504

 
$
45,072

Unsecured
 
359

 
360

 
9

 
9

Real estate:
 
 
 
 
 
 
 
 
One-to-four family residential
 
591

 
632

 
1,158

 
1,178

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
Commercial land
 
1,985

 
1,994

 
2,261

 
2,270

Income property
 
205

 
206

 
2,721

 
3,062

Owner occupied
 
1,287

 
1,325

 
9,922

 
10,300

Real estate construction:
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
Land and acquisition
 
—

 
—

 
318

 
318

Residential construction
 
—

 
59

 
—

 
—

Consumer
 
2,018

 
2,355

 
2,949

 
3,149

Total
 
$
33,060

 
$
45,209

 
$
54,842

 
$
65,358


Loans, excluding PCI loans
The following is an aging of the recorded investment of the loan portfolio as of December 31, 2019 and 2018:
 
 
Current
Loans
 
30 - 59
Days
Past Due
 
60 - 89
Days
Past Due
 
Greater
than 90
Days Past
Due
 
Total
Past Due
 
Nonaccrual
Loans
 
Total Loans
December 31, 2019
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,422,313

 
$
7,684

 
$
5,035

 
$
—

 
$
12,719

 
$
26,615

 
$
3,461,647

Unsecured
 
128,852

 
392

 
80

 
—

 
472

 
359

 
129,683

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
261,886

 
2,162

 
256

 
—

 
2,418

 
591

 
264,895

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
300,580

 
625

 
—

 
—

 
625

 
1,985

 
303,190

Income property
 
2,057,359

 
1,797

 
—

 
—

 
1,797

 
205

 
2,059,361

Owner occupied
 
1,795,771

 
4,287

 
—

 
—

 
4,287

 
1,287

 
1,801,345

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
1,364

 
—

 
—

 
—

 
—

 
—

 
1,364

Residential construction
 
189,350

 
951

 
—

 
—

 
951

 
—

 
190,301

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
88,389

 
—

 
—

 
—

 
—

 
—

 
88,389

Owner occupied
 
73,203

 
—

 
—

 
—

 
—

 
—

 
73,203

Consumer
 
290,174

 
284

 
95

 
—

 
379

 
2,018

 
292,571

Total
 
$
8,609,241

 
$
18,182

 
$
5,466

 
$
—

 
$
23,648

 
$
33,060

 
$
8,665,949

 
 
Current
Loans
 
30 - 59
Days
Past Due
 
60 - 89
Days
Past Due
 
Greater
than 90
Days Past
Due
 
Total
Past Due
 
Nonaccrual
Loans
 
Total Loans
December 31, 2018
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,267,709

 
$
5,864

 
$
3,624

 
$
—

 
$
9,488

 
$
35,504

 
$
3,312,701

Unsecured
 
111,868

 
240

 
—

 
—

 
240

 
9

 
112,117

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
233,941

 
694

 
233

 
—

 
927

 
1,158

 
236,026

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
283,416

 
—

 
—

 
—

 
—

 
2,261

 
285,677

Income property
 
1,910,505

 
5,009

 
2,241

 
—

 
7,250

 
2,721

 
1,920,476

Owner occupied
 
1,606,085

 
1,744

 
—

 
—

 
1,744

 
9,922

 
1,617,751

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
4,099

 
—

 
—

 
—

 
—

 
318

 
4,417

Residential construction
 
212,303

 
93

 
—

 
—

 
93

 
—

 
212,396

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
194,912

 
—

 
—

 
—

 
—

 
—

 
194,912

Owner occupied
 
79,805

 
7,258

 
—

 
—

 
7,258

 
—

 
87,063

Consumer
 
314,008

 
1,057

 
201

 
—

 
1,258

 
2,949

 
318,215

Total
 
$
8,218,651

 
$
21,959

 
$
6,299

 
$
—

 
$
28,258

 
$
54,842

 
$
8,301,751


The following is an analysis of the impaired loans (see Note 1, “Summary of Significant Accounting Policies,”) as of December 31, 2019 and 2018:
 
 
Recorded Investment
of Loans
Collectively Measured
for Contingency
Provision
 
Recorded Investment
of Loans
Individually
Measured for
Specific
Impairment
 
Impaired Loans With
Recorded Allowance
 
Impaired Loans Without
Recorded Allowance
 
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Allowance
 
Recorded
Investment
 
Unpaid
Principal
Balance
December 31, 2019
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,437,564

 
$
24,083

 
$
3,286

 
$
3,851

 
$
93

 
$
20,797

 
$
28,658

Unsecured
 
129,671

 
12

 
12

 
12

 
—

 
—

 
—

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
264,513

 
382

 
299

 
588

 
5

 
83

 
182

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
300,973

 
2,217

 
1,592

 
1,601

 
312

 
625

 
663

Income property
 
2,059,361

 
—

 
—

 
—

 
—

 
—

 
—

Owner occupied
 
1,797,682

 
3,663

 
3,663

 
5,233

 
29

 
—

 
—

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
1,364

 
—

 
—

 
—

 
—

 
—

 
—

Residential construction
 
190,301

 
—

 
—

 
—

 
—

 
—

 
—

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
88,389

 
—

 
—

 
—

 
—

 
—

 
—

Owner occupied
 
73,203

 
—

 
—

 
—

 
—

 
—

 
—

Consumer
 
290,934

 
1,637

 
483

 
637

 
22

 
1,154

 
1,310

Total
 
$
8,633,955

 
$
31,994

 
$
9,335

 
$
11,922

 
$
461

 
$
22,659

 
$
30,813

 
 
 
Recorded Investment
of Loans
Collectively Measured
for Contingency
Provision
 
Recorded Investment
of Loans
Individually
Measured for
Specific
Impairment
 
Impaired Loans With
Recorded Allowance
 
Impaired Loans Without
Recorded Allowance
 
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Allowance
 
Recorded
Investment
 
Unpaid
Principal
Balance
December 31, 2018
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,286,416

 
$
26,285

 
$
6,350

 
$
8,460

 
$
2,023

 
$
19,935

 
$
24,404

Unsecured
 
112,097

 
20

 
20

 
20

 
—

 
—

 
—

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
235,138

 
888

 
325

 
798

 
8

 
563

 
575

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
283,451

 
2,226

 
—

 
—

 
—

 
2,226

 
2,272

Income property
 
1,917,522

 
2,954

 
99

 
165

 
1

 
2,855

 
3,011

Owner occupied
 
1,605,042

 
12,709

 
3,231

 
4,666

 
69

 
9,478

 
9,750

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
4,417

 
—

 
—

 
—

 
—

 
—

 
—

Residential construction
 
212,396

 
—

 
—

 
—

 
—

 
—

 
—

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
194,912

 
—

 
—

 
—

 
—

 
—

 
—

Owner occupied
 
87,063

 
—

 
—

 
—

 
—

 
—

 
—

Consumer
 
314,193

 
4,022

 
3,326

 
3,584

 
31

 
696

 
704

Total
 
$
8,252,647

 
$
49,104

 
$
13,351

 
$
17,693

 
$
2,132

 
$
35,753

 
$
40,716


The following table provides additional information on impaired loans for the years ended December 31, 2019, 2018 and 2017:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
Average Recorded
Investment
Impaired Loans 
 
Interest Recognized
on
Impaired Loans
 
Average Recorded
Investment
Impaired Loans 
 
Interest Recognized
on
Impaired Loans
 
Average Recorded
Investment
Impaired Loans 
 
Interest Recognized
on
Impaired Loans
 
 
(in thousands)
Commercial business
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
24,682

 
$
202

 
$
39,701

 
$
81

 
$
20,282

 
$
60

Unsecured
 
16

 
1

 
191

 
2

 
5

 
—

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
665

 
42

 
748

 
42

 
730

 
49

Commercial and multifamily residential
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
2,606

 
31

 
2,371

 
34

 
2,079

 
—

Income property
 
1,121

 
—

 
3,284

 
130

 
4,314

 
51

Owner occupied
 
10,681

 
168

 
9,730

 
720

 
5,335

 
445

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
—

 
—

 
—

 
—

 
3

 
—

Residential construction
 
—

 
—

 
484

 
—

 
309

 
—

Owner occupied
 
—

 
—

 
3,240

 
—

 
1,620

 
203

Consumer
 
2,960

 
8

 
5,712

 
129

 
5,973

 
163

Total
 
$
42,731

 
$
452

 
$
65,461

 
$
1,138

 
$
40,650

 
$
971


The following is an analysis of loans classified as TDR for the years ended December 31, 2019, 2018 and 2017:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
Number of TDR Modifications
 
Pre-Modification
Outstanding
Recorded
Investment
 
Post-Modification
Outstanding
Recorded
Investment
 
Number of TDR Modifications
 
Pre-Modification
Outstanding
Recorded
Investment
 
Post-Modification
Outstanding
Recorded
Investment
 
Number of TDR Modifications
 
Pre-Modification
Outstanding
Recorded
Investment
 
Post-Modification
Outstanding
Recorded
Investment
 
 
(dollars in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
11

 
$
6,642

 
$
6,642

 
12

 
$
18,379

 
$
18,379

 
10

 
$
5,655

 
$
5,655

Unsecured
 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
26

 
26

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
1

 
45

 
45

 
—

 
—

 
—

 
3

 
583

 
583

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
687

 
687

Income property
 
1

 
217

 
217

 
1

 
891

 
891

 
1

 
1,152

 
1,152

Owner occupied
 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
78

 
78

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Owner occupied
 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
4,050

 
4,050

Consumer
 
11

 
444

 
444

 
21

 
2,777

 
2,777

 
42

 
5,891

 
5,891

Total
 
24

 
$
7,348

 
$
7,348

 
34

 
$
22,047

 
$
22,047

 
60

 
$
18,122

 
$
18,122


The Company’s loans classified as TDR are loans that have been modified or the borrower has been granted special concessions due to financial difficulties, that if not for the challenges of the borrower, the Company would not otherwise consider. The Company had $1.1 million of commitments to lend additional funds on loans classified as TDR as of December 31, 2019 as compared to $2.1 million of similar commitments at December 31, 2018. The TDR modifications or concessions are made to increase the likelihood that these borrowers with financial difficulties will be able to satisfy their debt obligations as amended. The concessions granted in the restructurings, summarized in the table above, largely consisted of maturity extensions, interest rate modifications or a combination of both. In limited circumstances, a reduction in the principal balance of the loan could also be made as a concession. Credit losses for loans classified as TDR are measured on the same basis as impaired loans. For impaired loans, an allowance is established when the collateral value less selling costs (or discounted cash flows or observable market price) of the impaired loan is lower than the recorded investment of that loan. The Company did have one $26 thousand consumer loan that defaulted within 12 months of being modified as a TDR during the year ended December 31, 2019. This defaulted TDR loan did not impact the allowance for loan loss as it paid off prior to year end. The Company did not experience any similar defaults during the years ended December 31, 2018 and 2017.
PCI Loans
PCI loans are accounted for under ASC 310-30 and initially measured at fair value based on expected future cash flows over the life of the loans. Loans that have common risk characteristics are aggregated into pools. The Company re-measures contractual and expected cash flows, at the pool-level, on a quarterly basis.
Contractual cash flows are calculated based upon the loan pool terms after applying a prepayment factor. Calculation of the applied prepayment factor for contractual cash flows is the same as described below for expected cash flows.
Inputs to the determination of expected cash flows include cumulative default and prepayment data as well as loss severity and recovery lag information. Cumulative default and prepayment data are calculated via a transition matrix. The transition matrix is a matrix of probability values that specifies the probability of a loan pool transitioning into a particular delinquency state (e.g. 0-30 days past due, 31 to 60 days, etc.) given its delinquency state at the re-measurement date. Loss severity factors are based upon either actual charge-off data within the loan pools or industry averages, and recovery lags are based upon the collateral within the loan pools.
The excess of cash flows expected to be collected over the initial fair value of PCI loans is referred to as the accretable yield and is accreted into interest income over the estimated life of the acquired loans using the effective yield method. Other adjustments to the accretable yield include changes in the estimated remaining life of the acquired loans, changes in expected cash flows and changes of indices for acquired loans with variable interest rates.
The following is an analysis of our PCI loans, net of related allowance for losses and remaining valuation discounts as of December 31, 2019 and 2018:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
Commercial business
 
$
8,083

 
$
9,672

Real estate:
 
 
 
 
One-to-four family residential
 
8,453

 
9,848

Commercial and multifamily residential
 
56,752

 
66,340

Total real estate
 
65,205

 
76,188

Real estate construction:
 
 
 
 
One-to-four family residential
 
—

 
153

Commercial and multifamily residential
 
—

 
507

Total real estate construction
 
—

 
660

Consumer
 
8,984

 
9,765

Subtotal of PCI loans
 
82,272

 
96,285

Less:
 
 
 
 
Valuation discount resulting from acquisition accounting
 
4,756

 
6,525

ALLL
 
2,844

 
3,611

PCI loans, net of valuation discounts and allowance for loan losses
 
$
74,672

 
$
86,149


The following table shows the changes in accretable yield for acquired loans for the years ended December 31, 2019, 2018, and 2017:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Balance at beginning of period
 
$
21,949

 
$
31,176

 
$
45,191

Accretion
 
(6,053
)
 
(8,194
)
 
(12,357
)
Disposals
 
46

 
(387
)
 
(158
)
Reclassifications from (to) nonaccretable difference
 
3,719

 
(646
)
 
(1,500
)
Balance at end of period
 
$
19,661

 
$
21,949

 
$
31,176


The Company did not acquire any loans accounted for under ASC 310-30 during 2019 or 2018.
v3.19.3.a.u2
Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit
 12 Months Ended
Dec. 31, 2019
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit  
Allowance for Loan and Lease Losses and Unfunded Loan Commitments and Letters of Credit
Allowance for Loan and Lease Losses and Allowance for Unfunded Commitments and Letters of Credit
We record an ALLL to recognize management’s estimate of credit losses incurred in the loan portfolio at each balance sheet date. We have used the same methodology for the ALLL calculation for the years ended December 31, 2019 and 2018.
The following tables show a detailed analysis of the ALLL for the years ended December 31, 2019, 2018 and 2017:
 
 
Beginning
Balance
 
Charge-offs
 
Recoveries
 
Provision (Recapture)
 
Ending
Balance
 
Specific
Reserve
 
General
Allocation
Year Ended December 31, 2019
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
43,188

 
$
(10,249
)
 
$
2,755

 
$
7,381

 
$
43,075

 
$
93

 
$
42,982

Unsecured
 
2,626

 
(75
)
 
350

 
184

 
3,085

 
—

 
3,085

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
593

 
(2
)
 
242

 
(226
)
 
607

 
5

 
602

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
3,947

 
—

 
286

 
2,146

 
6,379

 
312

 
6,067

Income property
 
4,044

 
—

 
320

 
2,062

 
6,426

 
—

 
6,426

Owner occupied
 
4,533

 
—

 
4

 
1,567

 
6,104

 
29

 
6,075

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
549

 
—

 
362

 
(799
)
 
112

 
—

 
112

Residential construction
 
5,536

 
(170
)
 
3,092

 
(3,982
)
 
4,476

 
—

 
4,476

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
5,784

 
—

 
1

 
(3,286
)
 
2,499

 
—

 
2,499

Owner occupied
 
2,604

 
—

 
—

 
702

 
3,306

 
—

 
3,306

Consumer
 
5,301

 
(1,400
)
 
930

 
(376
)
 
4,455

 
22

 
4,433

PCI
 
3,611

 
(3,319
)
 
3,979

 
(1,427
)
 
2,844

 
—

 
2,844

Unallocated
 
1,053

 
—

 
—

 
(453
)
 
600

 
—

 
600

Total
 
$
83,369

 
$
(15,215
)
 
$
12,321

 
$
3,493

 
$
83,968

 
$
461

 
$
83,507

 
 
Beginning
Balance
 
Charge-offs
 
Recoveries
 
Provision (Recapture)
 
Ending
Balance
 
Specific
Reserve
 
General
Allocation
Year Ended December 31, 2018
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
29,341

 
$
(11,560
)
 
$
3,024

 
$
22,383

 
$
43,188

 
$
2,023

 
$
41,165

Unsecured
 
2,000

 
(159
)
 
403

 
382

 
2,626

 
—

 
2,626

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
701

 
—

 
408

 
(516
)
 
593

 
8

 
585

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
4,265

 
—

 
99

 
(417
)
 
3,947

 
—

 
3,947

Income property
 
5,672

 
(780
)
 
912

 
(1,760
)
 
4,044

 
1

 
4,043

Owner occupied
 
5,459

 
—

 
20

 
(946
)
 
4,533

 
69

 
4,464

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
963

 
—

 
726

 
(1,140
)
 
549

 
—

 
549

Residential construction
 
3,709

 
—

 
890

 
937

 
5,536

 
—

 
5,536

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
7,053

 
—

 
—

 
(1,269
)
 
5,784

 
—

 
5,784

Owner occupied
 
4,413

 
—

 
—

 
(1,809
)
 
2,604

 
—

 
2,604

Consumer
 
5,163

 
(1,194
)
 
1,180

 
152

 
5,301

 
31

 
5,270

PCI
 
6,907

 
(4,862
)
 
3,847

 
(2,281
)
 
3,611

 
—

 
3,611

Unallocated
 
—

 
—

 
—

 
1,053

 
1,053

 
—

 
1,053

Total
 
$
75,646

 
$
(18,555
)
 
$
11,509

 
$
14,769

 
$
83,369

 
$
2,132

 
$
81,237


 
 
Beginning
Balance
 
Charge-offs
 
Recoveries
 
Provision (Recapture)
 
Ending
Balance
 
Specific
Reserve
 
General
Allocation
Year Ended December 31, 2017
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
36,050

 
$
(7,524
)
 
$
4,283

 
$
(3,468
)
 
$
29,341

 
$
1,867

 
$
27,474

Unsecured
 
960

 
(89
)
 
553

 
576

 
2,000

 
3

 
1,997

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
599

 
(460
)
 
568

 
(6
)
 
701

 
103

 
598

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
1,797

 
—

 
53

 
2,415

 
4,265

 
—

 
4,265

Income property
 
7,342

 
(287
)
 
498

 
(1,881
)
 
5,672

 
185

 
5,487

Owner occupied
 
6,439

 
—

 
124

 
(1,104
)
 
5,459

 
3

 
5,456

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
316

 
(14
)
 
72

 
589

 
963

 
—

 
963

Residential construction
 
669

 
—

 
106

 
2,934

 
3,709

 
—

 
3,709

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
404

 
—

 
1

 
6,648

 
7,053

 
—

 
7,053

Owner occupied
 
1,192

 
—

 
—

 
3,221

 
4,413

 
—

 
4,413

Consumer
 
3,534

 
(1,474
)
 
1,187

 
1,916

 
5,163

 
199

 
4,964

PCI
 
10,515

 
(6,812
)
 
6,187

 
(2,983
)
 
6,907

 
—

 
6,907

Unallocated
 
226

 
—

 
—

 
(226
)
 
—

 
—

 
—

Total
 
$
70,043

 
$
(16,660
)
 
$
13,632

 
$
8,631

 
$
75,646

 
$
2,360

 
$
73,286

Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Beginning balance
 
$
4,330

 
$
3,130

 
$
2,705

Net changes in the allowance for unfunded commitments and letters of credit
 
(900
)
 
1,200

 
425

Ending balance
 
$
3,430

 
$
4,330

 
$
3,130


Risk Elements
The extension of credit in the form of loans or other credit products to individuals and businesses is one of our principal business activities. Our policies and applicable laws and regulations require risk analysis as well as ongoing portfolio and credit management. We manage our credit risk through lending limit constraints, credit review, approval policies and extensive, ongoing internal monitoring. We also manage credit risk through diversification of the loan portfolio by type of loan, type of industry and type of borrower and by limiting the aggregation of debt to a single borrower.
Risk ratings are reviewed and updated whenever appropriate, with more periodic reviews as the risk and dollar value of loss on the loan increases. In the event full collection of principal and interest is not reasonably assured, the loan is appropriately downgraded and, if warranted, placed on nonaccrual status even though the loan may be current as to principal and interest payments. Additionally, we assess whether an impairment of a loan warrants specific reserves or a write-down of the loan.
Pass rated loans are generally considered to have sufficient sources of repayment in order to repay the loan in full in accordance with all terms and conditions. Special Mention rated loans have potential weaknesses that, if left uncorrected, may result in deterioration of the repayment prospects for the asset or in the Company’s credit position at some future date. Loans with a risk rating of Substandard or worse are reviewed to assess the ability of our borrowers to service all interest and principal obligations and, as a result, the risk rating may be adjusted accordingly. Loans risk rated as Substandard reflect loans where a loss is possible if loan weaknesses are not corrected. Doubtful rated loans have a high probability of loss; however, the amount of loss has not yet been determined. Loss rated loans are considered uncollectable and when identified, are charged-off.
The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans as of December 31, 2019 and 2018:
 
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Loss
 
Total
December 31, 2019
 
(in thousands)
Loans, excluding PCI loans
 
 
 
 
 
 
 
 
 
 
 
 
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,296,776

 
$
37,394

 
$
127,477

 
$
—

 
$
—

 
$
3,461,647

Unsecured
 
129,518

 
—

 
165

 
—

 
—

 
129,683

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
264,051

 
—

 
844

 
—

 
—

 
264,895

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
283,254

 
1,344

 
18,592

 
—

 
—

 
303,190

Income property
 
2,014,233

 
5,658

 
39,470

 
—

 
—

 
2,059,361

Owner occupied
 
1,757,757

 
6,158

 
37,430

 
—

 
—

 
1,801,345

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
1,364

 
—

 
—

 
—

 
—

 
1,364

Residential construction
 
190,301

 
—

 
—

 
—

 
—

 
190,301

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
88,389

 
—

 
—

 
—

 
—

 
88,389

Owner occupied
 
73,203

 
—

 
—

 
—

 
—

 
73,203

Consumer
 
289,588

 
—

 
2,983

 
—

 
—

 
292,571

Total
 
$
8,388,434

 
$
50,554

 
$
226,961

 
$
—

 
$
—

 
8,665,949

Less:
 
 
 
 
 
 
 
 
 
 
 
 
ALLL
 
81,124

Loans, excluding PCI loans, net
 
$
8,584,825

 
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Loss
 
Total
December 31, 2018
 
(in thousands)
Loans, excluding PCI loans
 
 
 
 
 
 
 
 
 
 
 
 
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,160,910

 
$
48,779

 
$
103,007

 
$
5

 
$
—

 
$
3,312,701

Unsecured
 
112,091

 
21

 
—

 
5

 
—

 
112,117

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
234,416

 
—

 
1,610

 
—

 
—

 
236,026

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
276,348

 
5,082

 
4,247

 
—

 
—

 
285,677

Income property
 
1,876,925

 
36,998

 
6,553

 
—

 
—

 
1,920,476

Owner occupied
 
1,556,852

 
14,964

 
45,935

 
—

 
—

 
1,617,751

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
4,099

 
—

 
318

 
—

 
—

 
4,417

Residential construction
 
212,225

 
—

 
171

 
—

 
—

 
212,396

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
194,912

 
—

 
—

 
—

 
—

 
194,912

Owner occupied
 
87,063

 
—

 
—

 
—

 
—

 
87,063

Consumer
 
313,817

 
—

 
4,398

 
—

 
—

 
318,215

Total
 
$
8,029,658

 
$
105,844

 
$
166,239

 
$
10

 
$
—

 
8,301,751

Less:
 
 
 
 
 
 
 
 
 
 
 
 
ALLL
 
79,758

Loans, excluding PCI loans, net
 
$
8,221,993


The following is an analysis of the credit quality of our PCI loan portfolio as of December 31, 2019 and 2018:
 
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Loss
 
Total
December 31, 2019
 
(in thousands)
PCI loans:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
6,109

 
$
962

 
$
606

 
$
—

 
$
—

 
$
7,677

Unsecured
 
406

 
—

 
—

 
—

 
—

 
406

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
8,351

 
—

 
102

 
—

 
—

 
8,453

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
8,720

 
497

 
212

 
—

 
—

 
9,429

Income property
 
18,386

 
—

 
297

 
—

 
—

 
18,683

Owner occupied
 
21,077

 
—

 
7,563

 
—

 
—

 
28,640

Consumer
 
8,758

 
—

 
226

 
—

 
—

 
8,984

Total
 
$
71,807

 
$
1,459

 
$
9,006

 
$
—

 
$
—

 
82,272

Less:
 
 
 
 
 
 
 
 
 
 
 
 
Valuation discount resulting from acquisition accounting
 
4,756

ALLL
 
2,844

PCI loans, net
 
$
74,672

 
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Loss
 
Total
December 31, 2018
 
(in thousands)
PCI loans:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
8,041

 
$
—

 
$
840

 
$
—

 
$
—

 
$
8,881

Unsecured
 
692

 
—

 
99

 
—

 
—

 
791

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
9,633

 
—

 
215

 
—

 
—

 
9,848

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
10,363

 
—

 
—

 
—

 
—

 
10,363

Income property
 
19,680

 
—

 
—

 
—

 
—

 
19,680

Owner occupied
 
35,944

 
—

 
353

 
—

 
—

 
36,297

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
151

 
—

 
2

 
—

 
—

 
153

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
507

 
—

 
—

 
—

 
—

 
507

Consumer
 
9,326

 
—

 
439

 
—

 
—

 
9,765

Total
 
$
94,337

 
$
—

 
$
1,948

 
$
—

 
$
—

 
96,285

Less:
 
 
 
 
 
 
 
 
 
 
 
 
Valuation discount resulting from acquisition accounting
 
6,525

ALLL
 
3,611

PCI loans, net
 
$
86,149
v3.19.3.a.u2
Other Real Estate Owned
 12 Months Ended
Dec. 31, 2019
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]  
Other Real Estate Owned
Other Real Estate Owned
The following table sets forth activity in OREO for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
 
(in thousands)
Balance, beginning of period
 
$
6,019

 
$
13,298

Transfers in
 
386

 
1,200

Valuation adjustments
 
(195
)
 
(698
)
Proceeds from sale of OREO property
 
(6,455
)
 
(7,261
)
Gain (loss) on sale of OREO, net
 
797

 
(520
)
Balance, end of period
 
$
552

 
$
6,019


At December 31, 2019, the carrying amount of foreclosed residential real estate properties held as a result of obtaining physical possession was $311 thousand and the recorded investment of consumer mortgage loans secured by residential real estate properties for which formal foreclosure proceedings were in process was $875 thousand.
v3.19.3.a.u2
Premises and Equipment
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Premises and Equipment
Premises and Equipment
Real and personal property and software, less accumulated depreciation and amortization, were as follows:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
Land
 
$
53,124

 
$
54,185

Buildings
 
107,371

 
108,890

Leasehold improvements
 
28,459

 
27,859

Furniture and equipment
 
37,929

 
32,292

Vehicles
 
510

 
511

Computer software
 
15,936

 
19,358

Total cost
 
243,329

 
243,095

Less accumulated depreciation and amortization
 
(77,921
)
 
(74,307
)
Total
 
$
165,408

 
$
168,788


Total depreciation and amortization expense was $10.3 million, $10.4 million, and $9.8 million, for the years ended December 31, 2019, 2018, and 2017, respectively.
v3.19.3.a.u2
Goodwill and Intangible Assets
 12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill and Other Intangible Assets
In accordance with the Intangibles – Goodwill and Other topic of the FASB ASC, goodwill is not amortized but is reviewed for potential impairment at the reporting unit level. Management analyzes its goodwill for impairment on an annual basis and between annual tests in certain circumstances such as upon material adverse changes in legal, business, regulatory and economic factors. An impairment loss is recorded to the extent that the carrying amount of goodwill exceeds its implied fair value. The Company performed its annual impairment assessment as of July 31, 2019 and concluded that there was no impairment. As of December 31, 2019, we determined there were no events or circumstances which would more likely than not reduce the fair value of our reporting unit below its carrying amount.
The CDI is evaluated for impairment if events and circumstances indicate a possible impairment. The CDI is amortized on an accelerated basis over an estimated life of 10 years.
The following table sets forth activity for goodwill and other intangible assets for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Goodwill, beginning of period
 
$
765,842

 
$
765,842

 
$
382,762

Established through acquisitions (1)
 
—

 
—

 
383,080

Total goodwill, end of period
 
765,842

 
765,842

 
765,842

Other intangible assets, net
 
 
 
 
 
 
CDI:
 
 
 
 
 
 
Gross CDI balance, beginning of period
 
105,473

 
105,473

 
58,598

Accumulated amortization, beginning of period
 
(60,455
)
 
(48,219
)
 
(41,886
)
CDI, net, beginning of period
 
45,018

 
57,254

 
16,712

Established through acquisitions (1)
 
—

 
—

 
46,875

CDI current period amortization
 
(10,479
)
 
(12,236
)
 
(6,333
)
Total CDI, end of period
 
34,539

 
45,018

 
57,254

Intangible assets not subject to amortization
 
919

 
919

 
919

Other intangible assets, net at end of period
 
35,458

 
45,937

 
58,173

Total goodwill and intangible assets, end of period
 
$
801,300

 
$
811,779

 
$
824,015


__________
(1) See Note 2, “Business Combinations,” for additional information regarding the goodwill and CDI related to the acquisition of Pacific Continental on November 1, 2017.

The following table provides the estimated future amortization expense of CDI for the succeeding five years:
 
 
Years Ending December 31,
 
 
(in thousands)
2020
 
$
8,724

2021
 
7,264

2022
 
5,880

2023
 
4,552

2024
 
3,432
v3.19.3.a.u2
Leases
 12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Lessee, Operating Leases [Text Block]
Leases
Lease Commitments: 
The Company’s lease commitments consist primarily of leased locations under various non-cancellable operating leases that expire between 2020 and 2043. The majority of the leases contain renewal options and provisions for increases in rental rates based on an agreed upon index or predetermined escalation schedule.
The following table shows the details of the Company’s operating lease right-of-use asset and the associated lease liability for the period indicated:
Item
 
Balance Sheet Location
 
December 31, 2019
 
 
 
 
(in thousands)
Operating lease asset
 
Other assets
 
$
57,226

Operating lease liability
 
Other liabilities
 
$
63,030


At December 31, 2019, the Company’s operating leases have a weighted average remaining lease term of 7.7 years and a weighted average discount rate of 3.0%. Cash paid for amounts included in the measurement of operating lease liabilities was $11.2 million for the year ended December 31, 2019. Right-of-use assets obtained in exchange for new operating lease liabilities during the year ended December 31, 2019 were $20.6 million.
The following table shows the components of net lease costs:
Item
 
Statement of Income Location
 
Year Ended December 31, 2019
 
 
 
 
(in thousands)
Operating lease cost (1)
 
Occupancy
 
$
10,851

Variable lease cost
 
Occupancy
 
1,805

Sublease income
 
Occupancy
 
(1,182
)
Net lease cost
 
 
 
$
11,474

__________
(1) Includes short-term lease costs, which are immaterial.
Total rental expense on buildings and equipment, net of rental income of $1.2 million and $791 thousand for the years ended December 31, 2018 and 2017, respectively, was $9.6 million and $7.9 million for the years ended December 31, 2018 and 2017, respectively.
The following table shows the maturity analysis for operating leases as of December 31, 2019:
 
 
Year ending December 31,
 
 
(in thousands)
2020
 
$
11,105

2021
 
11,126

2022
 
10,689

2023
 
9,476

2024
 
6,980

Thereafter
 
21,866

Total future minimum lease payments
 
71,242

Amounts representing interest
 
(8,212
)
Present value of minimum lease payments
 
$
63,030


Future minimum lease payments for the Company’s operating leases as of December 31, 2018, prior to the adoption of the new lease guidance were as follows:
 
 
Year Ending December 31,
 
 
(in thousands)
2019
 
$
10,947

2020
 
9,766

2021
 
8,729

2022
 
8,102

2023
 
6,796

Thereafter
 
18,703

Total minimum payments
 
$
63,043


Sale-leaseback transactions:
On September 26, 2019, the Company sold one of its Washington facilities and leased back a portion of the facility utilized for branch operations. The lease term is through September 2022, with monthly payments of approximately $19 thousand. The sale-leaseback transaction resulted in a pre-tax gain of $5.9 million.
For additional detail regarding the new lease guidance, see Note 1, “Summary of Significant Accounting Policies and Reclassifications.”
v3.19.3.a.u2
Deposits
 12 Months Ended
Dec. 31, 2019
Deposits [Abstract]  
Deposits
Deposits
Year end deposits are summarized in the following table:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
Demand and other noninterest-bearing
 
$
5,328,146

 
$
5,227,216

Money market (1)
 
2,322,644

 
2,294,125

Interest-bearing demand (1)
 
1,150,437

 
1,084,863

Savings (1)
 
882,050

 
889,849

Interest-bearing public funds, other than certificates of deposit (1)
 
301,203

 
233,938

Certificates of deposit, less than $250,000
 
218,764

 
243,849

Certificates of deposit, $250,000 or more
 
151,995

 
89,473

Certificates of deposit insured by CDARS®
 
17,065

 
23,580

Brokered certificates of deposit
 
12,259

 
57,930

Reciprocal money market accounts
 
300,158

 
313,692

Subtotal
 
10,684,721

 
10,458,515

Valuation adjustment resulting from acquisition accounting
 
(13
)
 
(389
)
Total deposits
 
$
10,684,708

 
$
10,458,126


__________
(1) Beginning in 2019, interest-bearing public funds, other than certificates of deposit, are presented separately in this table. Prior period amounts have been reclassified to conform to current period presentation.
Overdrafts of $3.8 million and $4.0 million were reclassified as loan balances at December 31, 2019 and 2018, respectively.
The following table shows the amount and maturity of time deposits:
 
 
Years Ending December 31,
 
 
(in thousands)
2020
 
$
313,241

2021
 
53,679

2022
 
19,346

2023
 
8,060

2024
 
5,593

Thereafter
 
151

Total
 
$
400,070
v3.19.3.a.u2
Federal Home Loan Bank and Federal Reserve Bank Borrowings
 12 Months Ended
Dec. 31, 2019
Federal Home Loan Bank and Federal Reserve Bank Borrowings [Abstract]  
Federal Home Loan Bank and Federal Reserve Bank Borrowings [Text Block]
FHLB and FRB Borrowings
FHLB
The Company has entered into borrowing arrangements with the FHLB to borrow funds under a short-term floating rate fed funds overnight advance program and fixed-term loan agreements. All borrowings are secured by stock of the FHLB and a blanket pledge of qualifying loans receivable. The Company had aggregate borrowing capacity with the FHLB of $1.96 billion and $1.62 billion for the years ended December 31, 2019 and 2018, respectively, of which the Company had borrowed $953.0 million and $399.0 million, respectively. See Note 5, “Loans,” for the carrying value of pledged loans.
At December 31, 2019, FHLB advances were scheduled to mature as follows:
 
 
Federal Home Loan Bank Advances
Fixed rate advances
 
 
Weighted Average Rate
 
Amount
 
 
(dollars in thousands)
Within 1 year
 
1.82
%
 
$
946,000

Over 1 through 5 years
 
3.85
%
 
2,000

Due after 10 years
 
5.37
%
 
5,000

Total
 
953,000

Valuation adjustment from acquisition accounting
 
469

Total
 
$
953,469


The maximum, average outstanding and year end balances and average interest rates on advances from the FHLB were as follows for the years ended December 31, 2019, 2018 and 2017:
 
 
Years ended December 31,
 
 
2019
 
2018
 
2017
 
 
(dollars in thousands)
Balance at end of period
 
$
953,469

 
$
399,523

 
$
11,579

Average balance during period
 
$
469,983

 
$
166,563

 
$
79,788

Maximum month end balance during period
 
$
953,469

 
$
399,523

 
$
317,480

Weighted average rate during period
 
2.42
%
 
2.29
%
 
1.33
%
Weighted average rate at December 31
 
1.84
%
 
2.68
%
 
4.08
%

FRB
The Company is also eligible to borrow under the FRB’s primary credit program, including the Term Auction Facility auctions. All borrowings are secured by certain pledged, available for sale investment securities. While the Company had no borrowings as of December 31, 2019 and December 31, 2018, there were overnight borrowings resulting in average borrowings of $99 thousand and $14 thousand for 2019 and 2018, respectively. The Company had no borrowings in 2017. The Company pledges securities and loans for borrowing capacity at the FRB and had a borrowing capacity with the FRB of $209.1 million and $107.1 million for the years ended December 31, 2019 and 2018, respectively. See Note 4, “Securities,” for the carrying value of pledged investment securities and Note 5, “Loans,” for the carrying value of pledged loans.
v3.19.3.a.u2
Securities Sold Under Agreements to Repurchase
 12 Months Ended
Dec. 31, 2019
Securities Sold under Agreements to Repurchase [Abstract]  
Securities sold under agreements to repurchase
Securities Sold Under Agreements to Repurchase
Securities Sold Under Agreements to Repurchase - Term
The Company had previously entered into wholesale repurchase agreements with certain brokers. At December 31, 2017, the Company held $25.0 million in wholesale repurchase agreements with an interest rate of 1.88%. These agreements were settled on the repurchase date of March 19, 2018.
Securities Sold Under Agreements to Repurchase - Sweep
Sweep repurchase agreements are generally short-term agreements. These agreements are treated as financing transactions and the obligations to repurchase securities sold are reflected as a liability in the Consolidated Financial Statements. The dollar amount of securities underlying the agreements remains in the applicable asset account of the Consolidated Financial Statements. These agreements had a balance of $64.4 million and a weighted average interest rate of 1.24% at December 31, 2019. All of these repurchase agreements in existence at December 31, 2019 mature on a daily basis. Securities available for sale with a carrying amount of $76.0 million at December 31, 2019 were pledged as collateral for the sweep repurchase agreement borrowings.
v3.19.3.a.u2
Subordinated debentures
 12 Months Ended
Dec. 31, 2019
Subordinated Borrowing [Line Items]  
Subordinated Borrowings Disclosure [Text Block]
Subordinated Debentures
On November 1, 2017, with its acquisition of Pacific Continental, the Company assumed $35.0 million in aggregate principal amount of fixed-to-floating rate subordinated debentures. These debentures are callable at par on June 30, 2021, have a stated maturity of June 30, 2026 and bear interest at a fixed annual rate of 5.875% per year, from and including June 27, 2016, but excluding June 30, 2021. From and including June 30, 2021 through the maturity date or early redemption date, the interest rate will reset quarterly to an annual interest rate equal to the then-current three-month LIBOR plus 4.715%.
v3.19.3.a.u2
Revolving line of credit
 12 Months Ended
Dec. 31, 2019
Line of Credit [Member]  
Line of Credit Facility [Line Items]  
Short-term Debt [Text Block]
Revolving Line of Credit
During the second quarter of 2019, the Company entered into a $30.0 million short-term credit facility with an unaffiliated bank that matures in May 2020. This facility has a variable interest rate and provides the Company additional liquidity, if needed, for various corporate activities including the repurchase of shares of Columbia Banking System, Inc. common stock. As of December 31, 2019, there was no outstanding balance. The credit agreement requires the Company to comply with certain covenants including those related to asset quality and capital levels. The Company was in compliance with all covenants associated with this facility at December 31, 2019.
v3.19.3.a.u2
Derivatives and Balance Sheet Offsetting
 12 Months Ended
Dec. 31, 2019
General Discussion of Derivative Instruments and Hedging Activities [Abstract]  
Derivatives and Balance Sheet Offsetting
Derivatives and Balance Sheet Offsetting
The Company is exposed to certain risks arising from both its business and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of its assets and liabilities and the use of derivative financial instruments. Specifically, the Company enters into interest rate-based derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts,. The Company’s derivative financial instruments are used to manage differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments principally related to the Company’s loan portfolio.
The Company’s objectives in using interest rate derivatives are to add stability to interest income and to manage its exposure to interest rate movements. To accomplish this objective, the Company uses interest rate collars as part of its interest rate risk management strategy. Interest rate collars designated as cash flow hedges involve the payments of variable-rate amounts if interest rates rise above the cap strike rate on the contract and receipts of variable-rate amounts if interest rates fall below the floor strike rate on the contract. These derivative contracts are used to hedge the variable cash flows associated with existing variable-rate assets.
With respect to derivatives designated and that qualify as cash flow hedges of interest rate risk, the gain or loss on the derivative is recorded in accumulated other comprehensive income (loss) and subsequently reclassified into interest income in the same period(s) during which the hedged transaction affects earnings. Amounts reported in accumulated other comprehensive income (loss) related to derivatives will be reclassified to interest income as interest payments are received on the Company’s variable-rate assets. During the next 12 months, the Company estimates that there will be $3.2 million reclassified as an increase to interest income.
In addition, the Company periodically enters into certain commercial loan interest rate swap agreements in order to provide commercial loan customers the ability to convert from variable to fixed interest rates. Under these agreements, the Company enters into a variable-rate loan agreement with a customer in addition to a swap agreement. This swap agreement effectively converts the customer’s variable rate loan into a fixed rate loan. The Company then enters into a corresponding swap agreement with a third party in order to offset its exposure on the variable and fixed components of the customer agreement. As the interest rate swap agreements with the customers and third parties are not designated as hedges under the Derivatives and Hedging topic of the FASB ASC, the instruments are marked to market in earnings. The notional amount of open interest rate swap agreements at December 31, 2019 and 2018 was $428.6 million and $366.7 million, respectively. Mark-to-market loss of $1 thousand for 2019 and mark-to-market gains of $8 thousand and $16 thousand for 2018 and 2017, respectively, were recorded to “Other” noninterest expense.
The following table presents the fair value of derivatives, as well as their classification on the Balance Sheet at December 31, 2019 and 2018:
 
Asset Derivatives
 
Liability Derivatives
 
2019
 
2018
 
2019
 
2018
 
Balance Sheet
Location
 
Fair Value
 
Balance Sheet
Location
 
Fair Value
 
Balance Sheet
Location
 
Fair Value
 
Balance Sheet
Location
 
Fair Value
 
 
 
(in thousands)
 
 
Derivatives designated as hedging instruments:
Interest rate collar
Other assets
 
$
14,727

 
Other assets
 
$
—

 
Other liabilities
 
$
—

 
Other liabilities
 
$
—

Derivatives not designated as hedging instruments:
Interest rate swap contracts
Other assets
 
$
19,144

 
Other assets
 
$
7,033

 
Other liabilities
 
$
19,145

 
Other liabilities
 
$
7,033

The table below presents the effect of cash flow hedge accounting on accumulated other comprehensive income (loss) for the years ended December 31, 2019 and 2018:
 
Amount of Gain or (Loss) Recognized in Accumulated Other Comprehensive Income on Derivative
 
Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
 
Amount of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income into Income
 
Years Ended December 31,
 
 
 
Years Ended December 31,
 
2019
 
2018
 
 
 
2019
 
2018
 
(in thousands)
Interest rate collar
$
15,322

 
$
—

 
 Interest income
 
$
595

 
$
—

The notional amount of the interest rate collar was $500.0 million at December 31, 2019. The cash flow hedge was determined to be effective during the periods presented and, as a result, qualifies for hedge accounting treatment.
The Company is party to interest rate swap contracts, interest rate collar and repurchase agreements that are subject to enforceable master netting arrangements or similar agreements. Under these agreements, the Company may have the right to net settle multiple contracts with the same counterparty.
The following tables show the gross interest rate swap contracts, collar agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of cash or other financial instruments. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown.
 
Gross Amounts of Recognized Assets/Liabilities
 
Gross Amounts Offset in the Consolidated Balance Sheets
 
Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets
 
Gross Amounts Not Offset in the Consolidated Balance Sheets
 
 
 
 
Collateral Pledged/Received
 
Net Amount
December 31, 2019
(in thousands)
Assets
 
 
 
 
 
 
 
 
 
Interest rate swap contracts
$
19,144

 
$
—

 
$
19,144

 
$
—

 
$
19,144

Interest rate collar
$
14,727

 
$
—

 
$
14,727

 
$
(14,727
)
 
$
—

Liabilities
 
 
 
 
 
 
 
 
 
Interest rate swap contracts
$
19,145

 
$
—

 
$
19,145

 
$
(19,145
)
 
$
—

Repurchase agreements
$
64,437

 
$
—

 
$
64,437

 
$
(64,437
)
 
$
—

 
 
 
 
 
 
 
 
 
 
December 31, 2018
 
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
 
Interest rate swap contracts
$
7,033

 
$
—

 
$
7,033

 
$
—

 
$
7,033

Liabilities
 
 
 
 
 
 
 
 
 
Interest rate swap contracts
$
7,033

 
$
—

 
$
7,033

 
$
(3,235
)
 
$
3,798

Repurchase agreements
$
61,094

 
$
—

 
$
61,094

 
$
(61,094
)
 
$
—


The Company’s agreements with each of its derivative counterparties provide that if the Company defaults or is capable of being declared in default on any of its indebtedness, the Company could also be declared in default on its derivative obligations.
The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements:
 
 
Remaining contractual maturity of the agreements
 
 
Overnight and continuous
 
Up to 30 days
 
30 - 90 days
 
Greater than 90 days
 
Total
December 31, 2019
 
(in thousands)
Class of collateral pledged for repurchase agreements
 
 
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations
 
$
64,437

 
$
—

 
$
—

 
$
—

 
$
64,437

Gross amount of recognized liabilities for repurchase agreements
 
64,437

Amounts related to agreements not included in offsetting disclosure
 
$
—


The collateral utilized for the Company’s repurchase agreements is subject to market fluctuations as well as prepayments of principal. The Company monitors the risk of the fair value of its pledged collateral falling below acceptable amounts based on the type of the underlying repurchase agreement. The pledged collateral related to the Company’s $64.4 million sweep repurchase agreements, which mature on an overnight basis, is monitored on a daily basis as the underlying sweep accounts can have frequent transaction activity and the amount of pledged collateral is adjusted as necessary.
v3.19.3.a.u2
Employee Benefit Plans
 12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]  
Employee Benefit Plans
Employee Benefit Plans
401(k) Plan
The Company maintains defined contribution and profit sharing plans in conformity with the provisions of section 401(k) of the Internal Revenue Code. The Columbia Bank 401(k) Plan, permits Columbia Bank employees who are at least 18 years of age to contribute up to 75% of their eligible compensation to the 401(k) Plan starting on the first day of the month following their hire date. On a per pay period basis the Company is required to match 50% of employee contributions up to 3% of each employee’s eligible compensation. The Company contributed $3.5 million during 2019, $3.3 million during 2018, and $2.7 million during 2017, in matching funds to the 401(k) Plan. Additionally, as determined annually by the board of directors of the Company, the 401(k) Plan provides for a non-matching discretionary profit sharing contribution. The Company’s discretionary profit sharing contributions were $7.3 million during 2019, $7.0 million during 2018 and $5.7 million during 2017.
Employee Stock Purchase Plan
The Company maintains an ESP Plan in which substantially all employees of the Company are eligible to participate. The ESP Plan provides participants the opportunity to purchase common stock of the Company at a discounted price. Under the ESP Plan, participants can purchase common stock of the Company for 90% of the lowest price on either the first or last day in each of two six month look-back periods. The look-back periods are January 1st through June 30th and July 1st through December 31st of each calendar year. The 10% discount is recognized by the Company as compensation expense and does not have a material impact on net income or earnings per common share. Participants of the ESP Plan purchased 57,201 shares for $2.1 million in 2019, 50,750 shares for $2.0 million in 2018 and 38,387 shares for $1.5 million in 2017. At December 31, 2019 there were 303,156 shares available for purchase under the ESP Plan.
Supplemental Compensation Plan
The Company maintains Unit Plans to provide benefits for certain employees. The Unit Plans generally vest over a 10 year period and provide a fixed annual benefit over the subsequent 10 year period. At December 31, 2019 and 2018, the liability associated with these plans was $4.0 million and $4.2 million, respectively. Expense associated with these plans for the years ended December 31, 2019, 2018 and 2017 was $415 thousand, $337 thousand and $452 thousand, respectively.
Supplemental Executive Retirement Plan
The Company maintains a SERP, a nonqualified deferred compensation plan that provides retirement benefits to certain highly compensated executives. The SERP is unsecured and unfunded and there are no program assets. The SERP projected benefit obligation, which represents the vested net present value of future payments to individuals under the plan is accrued over the estimated remaining term of employment of the participants and has been determined by actuarial valuation using a discount rate of 3.34% for 2019 and 4.30% for 2018. Additional assumptions and features of the plan are a normal retirement age of 65 and a 2% annual cost of living benefit adjustment. The projected benefit obligation is included in “Other liabilities” on the Consolidated Balance Sheets.
The following table reconciles the accumulated liability for the projected benefit obligation:
 
 
December 31,
2019
 
2018
 
 
(in thousands)
Balance, beginning of year
 
$
21,287

 
$
20,553

Actuarial (gain) loss
 
2,663

 
(31
)
Benefit expense
 
1,930

 
1,701

Benefit payments
 
(966
)
 
(936
)
Balance, end of year
 
$
24,914

 
$
21,287


The benefits expected to be paid in conjunction with the SERP are presented in the following table:
 
 
Years Ending December 31,
 
 
(in thousands)
2020
 
$
1,971

2021
 
1,116

2022
 
1,135

2023
 
1,239

2024
 
1,438

2025 through 2029
 
8,574

Total
 
$
15,473
v3.19.3.a.u2
Commitments and Contingent Liabilities
 12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingent Liabilities
Commitments and Contingent Liabilities
Financial Instruments with Off-Balance Sheet Risk: In the normal course of business, the Company makes loan commitments (typically unfunded loans and unused lines of credit) and issues standby letters of credit to accommodate the financial needs of its customers.
Standby letters of credit commit the Company to make payments on behalf of customers under specified conditions. Historically, no significant losses have been incurred by the Company under standby letters of credit. Both arrangements have credit risk essentially the same as that involved in extending loans to customers and are subject to the Company’s normal credit policies, including collateral requirements, where appropriate. At December 31, 2019 and 2018, the Company’s loan commitments were $2.67 billion and $2.62 billion, respectively. Standby letters of credit were $25.7 million and $28.3 million at December 31, 2019 and 2018, respectively. In addition, there were no commitments under commercial letters of credit used to facilitate customers’ trade transactions and other off-balance sheet liabilities at December 31, 2019 and 2018.
Legal Proceedings: The Company and its subsidiaries are from time to time defendants in and are threatened with various legal proceedings arising from their regular business activities. Management, after consulting with legal counsel, is of the opinion that the ultimate liability, if any, resulting from these pending or threatened actions and proceedings will not have a material effect on the financial statements of the Company.
v3.19.3.a.u2
Shareholders' Equity
 12 Months Ended
Dec. 31, 2019
Stockholders' Equity Note [Abstract]  
Shareholders' Equity
Shareholders’ Equity
Dividends.
The following summarizes the dividend activity for the year ended December 31, 2019:
Declared
 
Regular Cash Dividends Per Common Share
 
Special Cash Dividends Per Common Share
 
Record Date
 
Paid Date
January 24, 2019
 
$
0.28

 
$
0.14

 
February 6, 2019
 
February 20, 2019
April 25, 2019
 
$
0.28

 
$
0.14

 
May 8, 2019
 
May 22, 2019
July 25, 2019
 
$
0.28

 
$
—

 
August 7, 2019
 
August 21, 2019
October 24, 2019
 
$
0.28

 
$
—

 
November 6, 2019
 
November 20, 2019

Subsequent to year end, on January 23, 2020, the Company declared a regular quarterly cash dividend of $0.28 per common share and a special cash dividend of $0.22 per commons share payable on February 19, 2020, to shareholders of record at the close of business on February 5, 2020.
The payment of cash dividends is subject to federal regulatory requirements for capital levels and other restrictions. In addition, the cash dividends paid by Columbia Bank to the Company are subject to both federal and state regulatory requirements.
Share Repurchase Program:
For the year ended December 31, 2019, the Company repurchased 1.5 million shares of common stock at an average price of $35.00 per share. As of December 31, 2019, there are 1.4 million remaining shares authorized to be repurchased under the current Board approved share repurchase program.
v3.19.3.a.u2
Accumulated Other Comprehensive Income
 12 Months Ended
Dec. 31, 2019
Accumulated Other Comprehensive Income [Abstract]  
Comprehensive Income (Loss) Note [Text Block]
Accumulated Other Comprehensive Income
The following table shows changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2019, 2018 and 2017:
 
 
Unrealized Gains and Losses on Available for Sale Securities (1)
 
Unrealized Gains and Losses on Pension Plan Liability (1)
 
Unrealized Gains and Losses on Hedging Instruments (1)
 
Total (1)
Year Ended December 31, 2019
 
(in thousands)
Beginning balance
 
$
(33,128
)
 
$
(2,177
)
 
$
—

 
$
(35,305
)
Other comprehensive income (loss) before reclassifications
 
67,802

 
(2,042
)
 
11,760

 
77,520

Amounts reclassified from accumulated other comprehensive loss (2)
 
(1,636
)
 
245

 
(457
)
 
(1,848
)
Net current-period other comprehensive income (loss)
 
66,166

 
(1,797
)
 
11,303

 
75,672

Ending balance
 
$
33,038

 
$
(3,974
)
 
$
11,303

 
$
40,367

Year Ended December 31, 2018
 
 
 
 
 
 
 
 
Beginning balance
 
$
(19,779
)
 
$
(2,446
)
 
$
—

 
$
(22,225
)
Adjustment pursuant to adoption of ASU 2016-01
 
157

 
—

 
—

 
157

Other comprehensive income (loss) before reclassifications
 
(13,425
)
 
24

 
—

 
(13,401
)
Amounts reclassified from accumulated other comprehensive loss (2)
 
(81
)
 
245

 
—

 
164

Net current-period other comprehensive income (loss)
 
(13,506
)
 
269

 
—

 
(13,237
)
Ending balance
 
$
(33,128
)
 
$
(2,177
)
 
$
—

 
$
(35,305
)
Year Ended December 31, 2017
 
 
 
 
 
 
 
 
Beginning balance
 
$
(12,704
)
 
$
(6,295
)
 
$
—

 
$
(18,999
)
Other comprehensive income (loss) before reclassifications
 
(3,391
)
 
4,017

 
—

 
626

Amounts reclassified from accumulated other comprehensive loss (2)
 
7

 
223

 
—

 
230

Net current-period other comprehensive income (loss)
 
(3,384
)
 
4,240

 
—

 
856

Adjustment pursuant to adoption of ASU 2018-02
 
$
(3,691
)
 
$
(391
)
 
$
—

 
$
(4,082
)
Ending balance
 
$
(19,779
)
 
$
(2,446
)
 
$
—

 
$
(22,225
)
__________
(1) All amounts are net of tax. Amounts in parenthesis indicate debits.
(2) See following table for details about these reclassifications.
In December 2017, the Company made an election to reclassify income tax effects related to the Tax Cuts and Jobs Act of $4.1 million from accumulated other comprehensive income to retained earnings. The Company uses the portfolio approach to account for the tax consequences of amounts reported in OCI.
The following table shows details regarding the reclassifications from accumulated other comprehensive income for the years ended December 31, 2019, 2018 and 2017:
 
 
Amount Reclassified from Accumulated Other Comprehensive Income
 
Affected line Item in the Consolidated Statement of Income
 
 
Years Ended December 31,
 
 
 
 
2019
 
2018
 
2017
 
 
 
 
(in thousands)
 
 
Unrealized gains and losses on available for sale debt securities
 
$
2,132

 
$
106

 
$
(11
)
 
Investment securities gains (losses), net
 
 
2,132

 
106

 
(11
)
 
Total before tax
 
 
(496
)
 
(25
)
 
4

 
Income tax provision
 
 
$
1,636

 
$
81

 
$
(7
)
 
Net of tax
 
 
 
 
 
 
 
 
 
Amortization of pension plan liability actuarial losses
 
$
(319
)
 
$
(319
)
 
$
(350
)
 
Compensation and employee benefits
 
 
(319
)
 
(319
)
 
(350
)
 
Total before tax
 
 
74

 
74

 
127

 
Income tax provision
 
 
$
(245
)
 
$
(245
)
 
$
(223
)
 
Net of tax
 
 
 
 
 
 
 
 
 
Unrealized gains from hedging instruments
 
$
595

 
$
—

 
$
—

 
Loans
 
 
595

 
—

 
—

 
Total before tax
 
 
(138
)
 
—

 
—

 
Income tax provision
 
 
$
457

 
$
—

 
$
—

 
Net of tax
v3.19.3.a.u2
Fair Value Accounting and Measurement
 12 Months Ended
Dec. 31, 2019
Fair Value Disclosures [Abstract]  
Fair Value Accounting and Measurement
Fair Value Accounting and Measurement
The Fair Value Measurements and Disclosures topic of the FASB ASC defines fair value, establishes a consistent framework for measuring fair value and expands disclosure requirements about fair value. We hold fixed and variable rate interest-bearing securities, investments in marketable equity securities and certain other financial instruments, which are carried at fair value. Fair value is determined based upon quoted prices when available or through the use of alternative approaches, such as matrix or model pricing, when market quotes are not readily accessible or available.
The valuation techniques are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our own market assumptions. These two types of inputs create the following fair value hierarchy:
Level 1 – Quoted prices for identical instruments in active markets that are accessible at the measurement date.
Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model derived valuations whose inputs are observable or whose significant value drivers are observable.
Level 3 – Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable.
Fair values are determined as follows:
Securities at fair value are priced using a combination of market activity, industry recognized information sources, yield curves, discounted cash flow models and other factors. These fair value calculations are considered a Level 2 input method under the provisions of the Fair Value Measurements and Disclosures topic of the FASB ASC for all securities other than U.S. Treasury Notes and other securities, which are considered a Level 1 input method.
Interest rate contracts and the interest rate collar are valued in models, which use as their basis, readily observable market parameters and are classified within Level 2 of the valuation hierarchy.
The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at December 31, 2019 and 2018 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement:
 
 
Fair Value  at
December 31, 2019
 
Fair Value Measurements at Reporting Date Using
 
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
Debt securities available for sale
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
2,892,950

 
$
—

 
$
2,892,950

 
$
—

Other asset-backed securities (1)
 
196,050

 
—

 
196,050

 
—

State and municipal securities
 
488,802

 
—

 
488,802

 
—

U.S. government agency and government-sponsored enterprise securities
 
168,340

 
—

 
168,340

 
—

Total debt securities available for sale
 
$
3,746,142

 
$
—

 
$
3,746,142

 
$
—

Other assets:
 
 
 
 
 
 
 
 
Interest rate contracts
 
$
19,144

 
$
—

 
$
19,144

 
$
—

Interest rate collar
 
14,727

 
—

 
14,727

 
—

Liabilities
 
 
 
 
 
 
 
 
Other liabilities:
 
 
 
 
 
 
 
 
Interest rate contracts
 
$
19,145

 
$
—

 
$
19,145

 
$
—

 
 
Fair Value  at
December 31, 2018
 
Fair Value Measurements at Reporting Date Using
 
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
Debt securities available for sale
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
2,013,355

 
$
—

 
$
2,013,355

 
$
—

Other asset-backed securities (1)
 
174,935

 
—

 
174,935

 
—

State and municipal securities
 
574,323

 
—

 
574,323

 
—

U.S. government agency and government-sponsored enterprise securities
 
404,587

 
—

 
404,587

 
—

U.S. government securities
 
248

 
248

 
—

 
—

Total debt securities available for sale
 
$
3,167,448

 
$
248

 
$
3,167,200

 
$
—

Other assets:
 
 
 
 
 
 
 
 
Interest rate contracts
 
$
7,033

 
$
—

 
$
7,033

 
$
—

Liabilities
 
 
 
 
 
 
 
 
Other liabilities:
 
 
 
 
 
 
 
 
Interest rate contracts
 
$
7,033

 
$
—

 
$
7,033

 
$
—


__________
(1) Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
There were no transfers between Level 1 and Level 2 of the valuation hierarchy during the years ended December 31, 2019 and 2018. The Company recognizes transfers between levels of the valuation hierarchy based on the valuation level at the end of the reporting period.
Nonrecurring Measurements
Certain assets and liabilities are measured at fair value on a nonrecurring basis after initial recognition such as loans measured for impairment and OREO. The following methods were used to estimate the fair value of each such class of financial instrument:
Impaired loans—A loan is considered to be impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due (both interest and principal) according to the contractual terms of the loan agreement. Impaired loans are measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, a loan’s observable market price, or the fair market value of the collateral less estimated costs to sell if the loan is a collateral-dependent loan. The impairment evaluations are performed in conjunction with the ALLL process on a quarterly basis by officers in the Special Credits group, which reports to the Chief Credit Officer. The REASD, which also reports to the Chief Credit Officer, is responsible for obtaining appraisals from third-parties or performing internal evaluations. If an appraisal is obtained from a third-party, the REASD reviews the appraisal to evaluate the adequacy of the appraisal report, including its scope, methods, accuracy, and reasonableness.
The following table sets forth the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the years ended December 31, 2019 and 2018:
 
 
Fair Value  at
December 31, 2019
 
Fair Value Measurements at Reporting Date Using
 
Losses During the Year Ended
December 31, 2019
 
 
Level 1
 
Level 2
 
Level 3
 
 
 
(in thousands)
Impaired loans
 
$
10,007

 
$
—

 
$
—

 
$
10,007

 
$
7,519

 
 
$
10,007

 
$
—

 
$
—

 
$
10,007

 
$
7,519

 
 
Fair Value  at
December 31, 2018
 
Fair Value Measurements at Reporting Date Using
 
Losses During the Year Ended
December 31, 2018
 
 
Level 1
 
Level 2
 
Level 3
 
 
 
(in thousands)
Impaired loans
 
$
11,555

 
$
—

 
$
—

 
$
11,555

 
$
1,821

 
 
$
11,555

 
$
—

 
$
—

 
$
11,555

 
$
1,821


The losses on impaired loans disclosed above represent the amount of the specific reserve and/or charge-offs during the period applicable to loans held at period end. The amount of the specific reserve is included in the ALLL.
Quantitative information about Level 3 fair value measurements
The range and weighted average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets during 2019 and 2018, along with the valuation techniques used, are shown in the following tables:
 
 
Fair Value  at
December 31, 2019
 
Valuation Technique
 
Unobservable Input
 
Range (Weighted Average) (1)
 
 
(dollars in thousands)
Impaired loans - collateral-dependent (2)
 
$
10,007

 
Fair Market Value of Collateral
 
Adjustment to Stated Value
 
0% - 100% (49.68%)

__________
(1) Adjustment applied to appraisal value and stated value (in the case of fixed assets and inventory).
(2) Collateral consists of accounts receivable, inventory, fixed assets, real estate and cash.

 
 
Fair Value  at
December 31, 2018
 
Valuation Technique
 
Unobservable Input
 
Range (Weighted Average) (1)
 
 
(dollars in thousands)
Impaired loans - collateral-dependent (2)
 
$
8,394

 
Fair Market Value of Collateral
 
Adjustment to Stated Value
 
0.00% - 70.04% (7.02%)

Impaired loans - other (3)
 
$
3,161

 
Discounted Cash Flow
 
Discount Rate
 
0.34
%

__________
(1) Discount rate applied to discounted cash flow valuation or appraisal value and stated value (in the case of fixed assets and inventory).
(2) Collateral consists of accounts receivable, inventory, fixed assets, real estate and cash.
(3) As there was only one impaired loan re-measured using discounted cash flows, a range of discounts could not be provided.
The following tables summarize carrying amounts and estimated fair values of selected financial instruments for the periods indicated:
 
 
December 31, 2019
 
 
Carrying
Amount
 
Fair
Value
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
 
 
Cash and due from banks
 
$
223,541

 
$
223,541

 
$
223,541

 
$
—

 
$
—

Interest-earning deposits with banks
 
24,132

 
24,132

 
24,132

 
—

 
—

Debt securities available for sale
 
3,746,142

 
3,746,172

 
—

 
3,746,172

 
—

FHLB stock
 
48,120

 
48,120

 
—

 
48,120

 
—

Loans held for sale
 
17,718

 
17,718

 
—

 
17,718

 
—

Loans
 
8,659,497

 
8,883,865

 
—

 
—

 
8,883,865

Interest rate contracts
 
19,144

 
19,144

 
—

 
19,144

 
—

Interest rate collar
 
14,727

 
14,727

 
—

 
14,727

 
—

Liabilities
 
 
 
 
 
 
 
 
 
 
Time deposits
 
$
400,070

 
$
397,736

 
$
—

 
$
397,736

 
$
—

FHLB advances
 
953,469

 
952,762

 
—

 
952,762

 
—

Repurchase agreements
 
64,437

 
64,437

 
—

 
64,437

 
—

Subordinated debentures
 
35,277

 
35,491

 
—

 
35,491

 
—

Interest rate contracts
 
19,145

 
19,145

 
—

 
19,145

 
—


 
 
December 31, 2018
 
 
Carrying
Amount
 
Fair
Value
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
 
 
Cash and due from banks
 
$
260,180

 
$
260,180

 
$
260,180

 
$
—

 
$
—

Interest-earning deposits with banks
 
17,407

 
17,407

 
17,407

 
—

 
—

Debt securities available for sale
 
3,167,448

 
3,167,448

 
248

 
3,167,200

 
—

FHLB stock
 
25,960

 
25,960

 
—

 
25,960

 
—

Loans held for sale
 
3,849

 
3,849

 
—

 
3,849

 
—

Loans
 
8,308,142

 
8,316,946

 
—

 
—

 
8,316,946

Interest rate contracts
 
7,033

 
7,033

 
—

 
7,033

 
—

Liabilities
 
 
 
 
 
 
 
 
 
 
Time deposits
 
$
414,443

 
$
407,659

 
$
—

 
$
407,659

 
$
—

FHLB advances
 
399,523

 
400,085

 
—

 
400,085

 
—

Repurchase agreements
 
61,094

 
61,094

 
—

 
61,094

 
—

Subordinated debentures
 
35,462

 
34,897

 
—

 
34,897

 
—

Interest rate contracts
 
7,033

 
7,033

 
—

 
7,033

 
—
v3.19.3.a.u2
Earnings Per Common Share
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Earnings Per Common Share
Earnings Per Common Share
The Company applies the two-class method of computing basic and diluted EPS. Under the two-class method, EPS is determined for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. The Company issues restricted shares under share-based compensation plans and preferred shares which qualify as participating securities.
The following table sets forth the computation of basic and diluted EPS for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands except per share amounts)
Basic EPS:
 
 
 
 
 
 
Net income
 
$
194,451

 
$
172,882

 
$
112,828

Less: Earnings allocated to participating securities
 
 
 
 
 
 
Preferred shares
 
—

 
—

 
3

Nonvested restricted shares
 
1,530

 
1,892

 
1,501

Earnings allocated to common shareholders
 
$
192,921

 
$
170,990

 
$
111,324

Weighted average common shares outstanding
 
71,999

 
72,385

 
59,882

Basic earnings per common share
 
$
2.68

 
$
2.36

 
$
1.86

Diluted EPS:
 
 
 
 
 
 
Earnings allocated to common shareholders
 
$
192,921

 
$
170,990

 
$
111,324

Weighted average common shares outstanding
 
71,999

 
72,385

 
59,882

Dilutive effect of equity awards and warrants
 
33

 
5

 
6

Weighted average diluted common shares outstanding
 
72,032

 
72,390

 
59,888

Diluted earnings per common share
 
$
2.68

 
$
2.36

 
$
1.86

Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive
 
8

 
4

 
13
v3.19.3.a.u2
Share-Based Payments
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Share-Based Payments
Share-Based Payments
At December 31, 2019, the Company had one equity compensation plan (the “Plan”), which is shareholder approved, that provides for the granting of share options and shares to eligible employees and directors up to 3,050,000 shares.
Share Awards: Restricted share awards provide for the immediate issuance of shares of Company common stock to the recipient, with such shares held in escrow until certain conditions are met. Share awards provides for vesting requirements that include time-based, performance-based, or market-based conditions. Recipients of restricted shares do not pay any cash consideration to the Company for the shares and the holders of the restricted shares have voting rights. For share awards issued under our new equity incentive plan approved in 2018, the holder accrues dividends, which are paid out when the shares vest. For any awards granted prior to the new plan, the holder receives dividends whether or not the shares have vested. The fair value of time-based and performance-based share awards is equal to the fair market value of the Company’s common stock on the date of grant. The fair value of market-based awards is estimated on the date of grant using the Monte Carlo simulation model.
A summary of changes in the Company’s nonvested shares and related information for the years ended December 31, 2019, 2018 and 2017 is presented below:

 
Shares
 
Weighted
Average
Grant-Date
Fair Value
Nonvested at January 1, 2017
 
818,755

 
$
27.19

Granted
 
337,384

 
$
38.51

Vested
 
(253,509
)
 
$
25.67

Forfeited
 
(96,924
)
 
$
28.97

Nonvested at December 31, 2017
 
805,706

 
$
32.23

Granted
 
306,592

 
$
41.47

Vested
 
(237,146
)
 
$
28.78

Forfeited
 
(61,012
)
 
$
35.92

Nonvested at December 31, 2018
 
814,140

 
$
36.43

Granted
 
405,516

 
$
35.08

Vested
 
(268,253
)
 
$
32.50

Forfeited
 
(62,386
)
 
$
37.12

Nonvested at December 31, 2019
 
889,017

 
$
36.96


As of December 31, 2019, there was $23.1 million of total unrecognized compensation cost related to nonvested share-based compensation arrangements granted under the Plan. That cost is expected to be recognized over a weighted average period of 2.7 years. The total fair value, as measured on the date of vesting, of shares vested during the years ended December 31, 2019, 2018, and 2017 was $8.7 million, $6.7 million, and $6.5 million, respectively.
Share Options: Option awards are generally granted with an exercise price equal to the market price of the Company’s stock at the date of grant; those option awards generally vest based on three years of continual service and are exercisable for a five-year period after vesting. Option awards granted have a 10-year maximum term.
The fair value of each option award is estimated on the date of grant using the Black-Scholes option valuation model. The fair value of all options is amortized on a straight-line basis over the requisite service periods, which are generally the vesting periods. The expected life of options granted represents the period of time that they are expected to be outstanding. The expected life is determined based on historical experience with similar awards, giving consideration to the contractual terms and vesting schedules. Expected volatilities of our common stock are estimated at the date of grant based on the historical volatility of the stock. The volatility factor is based on historical stock prices over the most recent period commensurate with the estimated expected life of the award. The risk-free interest rate is based on the U.S. Treasury curve in effect at the time of the award. The expected dividend yield is based on dividend trends and the market value of the Company’s stock price at the time of the award.
A summary of option activity under the Plan as of December 31, 2019, and changes during the year then ended is presented below:

 
Shares
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
 
Aggregate
Intrinsic
Value
($000)
Balance at December 31, 2018
 
5,514

 
$
9.91

 
 
 
 
Expired
 
(1,187
)
 
9.91

 
 
 
 
Exercised
 
(4,327
)
 
9.91

 
 
 
 
Balance at December 31, 2019
 
—

 
$
—

 
0
 
$
—


The total intrinsic value of options exercised during the years ended December 31, 2019, 2018, and 2017 was $108 thousand, $29 thousand, and $67 thousand, respectively. There were no options granted during the years ended December 31, 2019, 2018, and 2017. There were no options that vested during the years ended December 2019, 2018, and 2017.
It is the Company’s policy to issue new shares for share option exercises and share awards. The Company expenses awards of share options and shares on a straight-line basis over the related vesting term of the award. For the years ended December 31, 2019, 2018 and 2017, the Company recognized pre-tax share-based compensation expense of $9.3 million, $8.4 million and $7.7 million, respectively.
v3.19.3.a.u2
Income Tax
 12 Months Ended
Dec. 31, 2019
Income Tax Disclosure [Abstract]  
Income Tax
Income Tax
The components of income tax expense are as follows:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Current expense
 
 
 
 
 
 
Federal
 
$
40,471

 
$
33,400

 
$
39,708

State
 
6,359

 
5,446

 
3,016

Total current tax expense
 
$
46,830

 
$
38,846

 
$
42,724

Deferred tax expense (benefit)
 
 
 
 
 
 
Federal
 
$
60

 
$
(291
)
 
$
21,524

State
 
270

 
399

 
907

Total deferred tax expense
 
330

 
108

 
22,431

Total
 
$
47,160

 
$
38,954

 
$
65,155


Significant components of the Company’s deferred tax assets and liabilities are as follows:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
Deferred tax assets:
 
 
 
 
ALLL
 
$
20,489

 
$
20,578

Lease liability
 
14,776

 
—

Deferred compensation
 
11,079

 
9,501

Stock options and restricted stock
 
2,016

 
1,850

OREO
 
—

 
288

Nonaccrual interest
 
112

 
446

Unrealized loss on investment securities
 
—

 
10,129

Net operating losses and credit carryforwards
 
4,136

 
5,356

Other
 
245

 
733

Total deferred tax assets
 
52,853

 
48,881

Deferred tax liabilities:
 
 
 
 
Asset purchase tax basis difference
 
(7,888
)
 
(7,229
)
Right of use asset
 
(13,415
)
 
—

FHLB stock dividends
 
(789
)
 
(790
)
Deferred loan fees
 
(4,097
)
 
(4,399
)
Unrealized gain on investment securities
 
(10,091
)
 
—

Purchase accounting
 
(8,946
)
 
(9,245
)
Depreciation
 
(3,152
)
 
(2,609
)
Cash flow hedge
 
(3,452
)
 
—

Other
 
(100
)
 
(195
)
Total deferred tax liabilities
 
(51,930
)
 
(24,467
)
Net deferred tax asset
 
$
923

 
$
24,414


A reconciliation of the Company’s effective income tax rate with the federal statutory tax rate is as follows:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
Amount
 
Percent
 
Amount
 
Percent
 
Amount
 
Percent
 
 
(dollars in thousands)
Income tax based on statutory rate
 
$
50,738

 
21
 %
 
$
44,485

 
21
 %
 
$
62,262

 
35
 %
Increase (decrease) resulting from:
 
 
 
 
 
 
 
 
 
 
 
 
Tax exempt instruments
 
(6,771
)
 
(3
)%
 
(6,423
)
 
(3
)%
 
(8,485
)
 
(5
)%
Bank owned life insurance
 
(1,963
)
 
(1
)%
 
(1,261
)
 
(1
)%
 
(3,351
)
 
(2
)%
Acquisition costs
 
—

 
—
 %
 
—

 
—
 %
 
825

 
1
 %
Deferred tax asset revaluation
 
—

 
—
 %
 
—

 
—
 %
 
12,210

 
7
 %
State income tax, net of federal benefit
 
5,134

 
2
 %
 
4,931

 
2
 %
 
2,550

 
1
 %
Other, net
 
22

 
1
 %
 
(2,778
)
 
(1
)%
 
(856
)
 
—
 %
Income tax provision
 
$
47,160

 
20
 %
 
$
38,954

 
18
 %
 
$
65,155

 
37
 %

As of December 31, 2019 and 2018, we had no unrecognized tax benefits. Our policy is to recognize interest and penalties on unrecognized tax benefits in “Provision for income taxes” in the Consolidated Statements of Income. There were no amounts related to interest and penalties recognized for the years ended December 31, 2019 and 2018. As a result of recent acquisitions, the Company has net operating loss carryforwards in the federal, Idaho and Oregon jurisdictions of $15.8 million, $14.3 million and $121 thousand, respectively, which begin to expire in 2024.
The Tax Cuts and Jobs Act was signed into law on December 22, 2017. The law included significant changes to the U.S. corporate tax system, including a Federal corporate rate reduction from 35% to 21%. In 2017, the Company applied the newly enacted corporate federal income tax rate of 21% resulting in a $12.2 million increase in tax expense from the re-measurement of its net deferred tax assets.
v3.19.3.a.u2
Regulatory Capital Requirements
 12 Months Ended
Dec. 31, 2019
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]  
Regulatory Capital Requirements
Regulatory Capital Requirements
The Company (on a consolidated basis) and its banking subsidiary are subject to various regulatory capital requirements administered by the federal banking agencies. 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 and its banking subsidiary’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and its banking subsidiary must meet specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not applicable to bank holding companies.
Basel III capital requirements became effective on January 1, 2015. The capital requirements, among other things (i) specify that Tier 1 capital consists of CET1, and “Additional Tier 1 capital” instruments meeting specified requirements, (ii) define CET1 narrowly by requiring that most deductions/adjustments to regulatory capital measures be made to CET1 and not to the other components of capital and (iii) expand the scope of the deductions/adjustments to capital as compared to existing regulations. Under the requirements that are now effective, the minimum capital ratios are (i) 4.5% CET1 to risk-weighted assets, (ii) 6% Tier 1 capital to risk-weighted assets, (iii) 8% total capital to risk-weighted assets and (iv) 4% Tier 1 capital to average total assets (Tier 1 leverage). The Company and the Bank have made the one-time election to opt-out of including accumulated other comprehensive income items in regulatory capital calculations.
The Capital Rules also require a capital conservation buffer designed to absorb losses during periods of economic stress. The capital conservation buffer is composed entirely of CET1, on top of these minimum risk-weighted asset ratios. In addition, the Capital Rules provide for a countercyclical capital buffer applicable only to certain covered institutions. We do not expect the countercyclical capital buffer to be applicable to us or the Bank. Banking institutions with a ratio of CET1 to risk-weighted assets above the minimum but below the capital conservation buffer (or below the combined capital conservation buffer and countercyclical capital buffer, when the latter is applied) will face constraints on dividends, equity repurchases and compensation based on the amount of the shortfall.
The implementation of the capital conservation buffer began on January 1, 2016 at the 0.625% level and was fully phased in over a three-year period (increasing by 0.625% on each subsequent January 1, until it reached 2.5% on January 1, 2019). As a result, the Company and the Bank are now required to maintain such additional capital conservation buffer of 2.5% of CET1, effectively resulting in minimum ratios of (i) 7% CET1 to risk-weighted assets, (ii) 8.5% Tier 1 capital to risk-weighted assets, and (iii) 10.5% total capital to risk-weighted assets. At December 31, 2019, the capital conservation buffer for the Company and the Bank was 5.60% and 5.29%, respectively. As of December 31, 2019, we and the Bank met all capital adequacy requirements under the Capital Rules.
FDIC regulations set forth the qualifications necessary for a bank to be classified as “well-capitalized,” primarily for assignment of FDIC insurance premium rates. To qualify as “well-capitalized,” banks must have a CET1 risk-adjusted capital ratio of 6.5%, a Tier I risk-adjusted capital ratio of at least 8%, a total risk-adjusted capital ratio of at least 10% and a leverage ratio of at least 5%. Failure to qualify as “well-capitalized” can negatively impact a bank’s ability to expand and to engage in certain activities.
As of December 31, 2019, the most recent notification from the FDIC categorized Columbia Bank as well-capitalized under the regulatory framework for prompt corrective action. To be categorized as well- capitalized, an institution must maintain minimum CET1 risk-based, Tier 1 risk-based, total risk-based and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since the notification that management believes have changed Columbia Bank’s category.
The Company and its banking subsidiary’s actual capital amounts and ratios as of December 31, 2019 and 2018 are presented in the following table:
 
 
Actual
 
Minimum Required
For Capital
Adequacy
Purposes
 
Minimum Required
Plus Capital
Conservation Buffer
Phase-In
 
Minimum Required
Plus Capital
Conservation Buffer
Fully Phased-In
 
To Be Well
Capitalized Under
Prompt
Corrective Action
Provision
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
 
 
(dollars in thousands)
December 31, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CET1 Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,317,202

 
12.45
%
 
$
476,260

 
4.50
%
 
N/A

 
N/A

 
$
740,849

 
7.00
%
 
N/A

 
N/A

Columbia Bank
 
$
1,318,044

 
12.46
%
 
$
475,913

 
4.50
%
 
N/A

 
N/A

 
$
740,310

 
7.00
%
 
$
687,430

 
6.50
%
Tier 1 Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,317,202

 
12.45
%
 
$
635,014

 
6.00
%
 
N/A

 
N/A

 
$
899,603

 
8.50
%
 
N/A

 
N/A

Columbia Bank
 
$
1,318,044

 
12.46
%
 
$
634,551

 
6.00
%
 
N/A

 
N/A

 
$
898,947

 
8.50
%
 
$
846,068

 
8.00
%
Total Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,439,877

 
13.60
%
 
$
846,685

 
8.00
%
 
N/A

 
N/A

 
$
1,111,274

 
10.50
%
 
N/A

 
N/A

Columbia Bank
 
$
1,405,422

 
13.29
%
 
$
846,068

 
8.00
%
 
N/A

 
N/A

 
$
1,110,464

 
10.50
%
 
$
1,057,585

 
10.00
%
Tier 1 Capital Leverage (to average assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,317,202

 
10.17
%
 
$
517,938

 
4.00
%
 
N/A

 
N/A

 
$
517,938

 
4.00
%
 
N/A

 
N/A

Columbia Bank
 
$
1,318,044

 
10.22
%
 
$
515,797

 
4.00
%
 
N/A

 
N/A

 
$
515,797

 
4.00
%
 
$
644,746

 
5.00
%
December 31, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CET1 Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,253,394

 
12.74
%
 
$
442,717

 
4.50
%
 
$
627,182

 
6.38
%
 
$
688,670

 
7.00
%
 
N/A

 
N/A

Columbia Bank
 
$
1,274,317

 
12.96
%
 
$
442,552

 
4.50
%
 
$
626,948

 
6.38
%
 
$
688,414

 
7.00
%
 
$
639,241

 
6.50
%
Tier 1 Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,253,394

 
12.74
%
 
$
590,289

 
6.00
%
 
$
774,754

 
7.88
%
 
$
836,243

 
8.50
%
 
N/A

 
N/A

Columbia Bank
 
$
1,274,317

 
12.96
%
 
$
590,069

 
6.00
%
 
$
774,465

 
7.88
%
 
$
835,931

 
8.50
%
 
$
786,759

 
8.00
%
Total Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,376,555

 
13.99
%
 
$
787,052

 
8.00
%
 
$
971,517

 
9.88
%
 
$
1,033,006

 
10.50
%
 
N/A

 
N/A

Columbia Bank
 
$
1,362,016

 
13.85
%
 
$
786,759

 
8.00
%
 
$
971,155

 
9.88
%
 
$
1,032,621

 
10.50
%
 
$
983,448

 
10.00
%
Tier 1 Capital Leverage (to average assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,253,394

 
10.24
%
 
$
489,399

 
4.00
%
 
$
489,399

 
4.00
%
 
$
489,399

 
4.00
%
 
N/A

 
N/A

Columbia Bank
 
$
1,274,317

 
10.42
%
 
$
489,254

 
4.00
%
 
$
489,254

 
4.00
%
 
$
489,254

 
4.00
%
 
$
611,567

 
5.00
%
v3.19.3.a.u2
Parent Company Financial Information
 12 Months Ended
Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]  
Parent Company Financial Information
Parent Company Financial Information
Condensed Balance Sheets—Parent Company Only
 
 
December 31,
2019
 
2018
 
 
(in thousands)
Assets
 
 
 
 
Cash
 
$
6,088

 
$
945

Interest-earning deposits
 
21,717

 
7,226

Total cash and cash equivalents
 
27,805

 
8,171

Investment in banking subsidiary
 
2,156,039

 
2,049,855

Investment in other subsidiaries
 
5,671

 
5,312

Goodwill
 
4,729

 
4,729

Other assets
 
1,675

 
1,595

Total assets
 
$
2,195,919

 
$
2,069,662

Liabilities and Shareholders’ Equity
 
 
 
 
Subordinated debentures
 
$
35,277

 
$
35,462

Other liabilities
 
680

 
551

Total liabilities
 
35,957

 
36,013

Shareholders’ equity
 
2,159,962

 
2,033,649

Total liabilities and shareholders’ equity
 
$
2,195,919

 
$
2,069,662



Condensed Statements of Income—Parent Company Only
 
 
Years Ended December 31,
2019
 
2018
 
2017
(in thousands)
Income
 
 
 
 
 
 
Dividend from banking subsidiary
 
$
168,000

 
$
85,250

 
$
66,800

Interest-earning deposits
 
100

 
12

 
2

Other income
 
68

 
56

 
8

Total income
 
168,168

 
85,318

 
66,810

Expense
 
 
 
 
 
 
Compensation and employee benefits
 
791

 
978

 
732

Subordinated debentures interest expense
 
1,871

 
1,871

 
304

Other borrowings interest expense
 
—

 
4

 
60

Other expense
 
2,111

 
2,058

 
3,090

Total expenses
 
4,773

 
4,911

 
4,186

Income before income tax benefit and equity in undistributed earnings of subsidiaries
 
163,395

 
80,407

 
62,624

Income tax benefit
 
(967
)
 
(1,017
)
 
(548
)
Income before equity in undistributed earnings of subsidiaries
 
164,362

 
81,424

 
63,172

Equity in undistributed earnings of subsidiaries
 
30,089

 
91,458

 
49,656

Net income
 
$
194,451

 
$
172,882

 
$
112,828


Condensed Statements of Cash Flows—Parent Company Only
 
 
Years Ended December 31,
2019
 
2018
 
2017
(in thousands)
Operating Activities
 
 
 
 
 
 
Net income
 
$
194,451

 
$
172,882

 
$
112,828

Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
 
 
 
Equity in undistributed earnings of subsidiaries
 
(30,089
)
 
(91,458
)
 
(49,656
)
Stock-based compensation expense
 
9,271

 
8,354

 
7,745

Net changes in other assets and liabilities
 
(133
)
 
1,622

 
1,672

Net cash provided by operating activities
 
173,500

 
91,400

 
72,589

Investing Activities
 
 
 
 
 
 
Net cash paid in business combinations
 
—

 
—

 
(580
)
Net cash used in investing activities
 
—

 
—

 
(580
)
Financing Activities
 
 
 
 
 
 
Common stock dividends
 
(102,265
)
 
(83,459
)
 
(51,308
)
Repayment of junior subordinated debentures
 
—

 
(8,248
)
 
(6,186
)
Cash settlement of acquired equity awards
 
—

 
—

 
(7,345
)
Purchase and retirement of common stock
 
(2,792
)
 
(2,677
)
 
(2,299
)
Purchase of treasury shares
 
(50,834
)
 
—

 
—

Proceeds from exercise of stock options
 
2,025

 
1,857

 
1,980

Net cash used in financing activities
 
(153,866
)
 
(92,527
)
 
(65,158
)
Increase (decrease) in cash and cash equivalents
 
19,634

 
(1,127
)
 
6,851

Cash and cash equivalents at beginning of year
 
8,171

 
9,298

 
2,447

Cash and cash equivalents at end of year
 
$
27,805

 
$
8,171

 
$
9,298

 
 
 
 
 
 
 
Supplemental disclosure of noncash investing and financing activities
 
 
 
 
 
 
Share-based consideration issued in business combinations
 
$
—

 
$
—

 
$
636,385
v3.19.3.a.u2
Summary Of Quarterly Financial Information (Unaudited)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Summary of Quarterly Financial Information (Unaudited)
Summary of Quarterly Financial Information (Unaudited)
Quarterly financial information for the years ended December 31, 2019 and 2018 is summarized as follows:
 
 
Fourth
Quarter
 
Third
Quarter
 
Second
Quarter
 
First
Quarter
 
Year Ended
December 31,
 
 
(in thousands, except per share amounts)
 
 
2019
 
 
 
 
 
 
 
 
 
 
Total interest income
 
$
133,109

 
$
132,533

 
$
135,422

 
$
128,888

 
$
529,952

Total interest expense
 
8,292

 
10,083

 
10,306

 
7,866

 
36,547

Net interest income
 
124,817

 
122,450

 
125,116

 
121,022

 
493,405

Provision for loan and lease losses
 
1,614

 
299

 
218

 
1,362

 
3,493

Noninterest income
 
21,807

 
28,030

 
25,648

 
21,696

 
97,181

Noninterest expense
 
86,978

 
87,076

 
86,728

 
84,700

 
345,482

Income before income taxes
 
58,032

 
63,105

 
63,818

 
56,656

 
241,611

Provision for income taxes
 
11,903

 
12,378

 
12,094

 
10,785

 
47,160

Net income
 
$
46,129

 
$
50,727

 
$
51,724

 
$
45,871

 
$
194,451

Per common share (1)
 
 
 
 
 
 
 
 
 
 
Earnings (basic)
 
$
0.64

 
$
0.70

 
$
0.71

 
$
0.63

 
$
2.68

Earnings (diluted)
 
$
0.64

 
$
0.70

 
$
0.71

 
$
0.63

 
$
2.68

 
 
 
 
 
 
 
 
 
 
 
2018
 
 
 
 
 
 
 
 
 
 
Total interest income
 
$
129,801

 
$
127,575

 
$
120,549

 
$
119,144

 
$
497,069

Total interest expense
 
5,913

 
4,779

 
3,875

 
3,663

 
18,230

Net interest income
 
123,888

 
122,796

 
116,674

 
115,481

 
478,839

Provision for loan and lease losses
 
1,789

 
3,153

 
3,975

 
5,852

 
14,769

Noninterest income
 
20,402

 
21,019

 
23,692

 
23,143

 
88,256

Noninterest expense
 
87,019

 
82,841

 
84,643

 
85,987

 
340,490

Income before income taxes
 
55,482

 
57,821

 
51,748

 
46,785

 
211,836

Provision for income taxes
 
10,734

 
11,406

 
9,999

 
6,815

 
38,954

Net income
 
$
44,748

 
$
46,415

 
$
41,749

 
$
39,970

 
$
172,882

Per common share (1)
 
 
 
 
 
 
 
 
 
 
Earnings (basic)
 
$
0.61

 
$
0.63

 
$
0.57

 
$
0.55

 
$
2.36

Earnings (diluted)
 
$
0.61

 
$
0.63

 
$
0.57

 
$
0.55

 
$
2.36

 __________
(1) Due to averaging of shares, quarterly EPS may not add up to the totals reported for the full year.
v3.19.3.a.u2
Revenue from Contracts with Customers
 12 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Revenue from Contract with Customer [Text Block]
Revenue from Contracts with Customers
Revenue in the scope of Topic 606, Revenue from Contracts with Customers is measured based on the consideration specified in the contract with a customer and excludes amounts collected on behalf of third parties. The vast majority of the Company’s revenue is specifically outside the scope of Topic 606. For in-scope revenue, the following is a description of principal activities, separated by the timing of revenue recognition from which the Company generates its revenue from contracts with customers.
a.
Revenue earned at a point in time - Examples of revenue earned at a point in time are ATM transaction fees, wire transfer fees, overdraft fees, interchange fees and foreign exchange transaction fees. Revenue is primarily based on the number and type of transactions and is generally derived from transactional information accumulated by our systems and is recognized immediately as the transactions occur or upon providing the service to complete the customer’s transaction. The Company is the principal in each of these contracts, with the exception of interchange fees, in which case we are acting as the agent and record revenue net of expenses paid to the principal.
b.
Revenue earned over time - The Company earns revenue from contracts with customers in a variety of ways where the revenue is earned over a period of time - generally monthly. Examples of this type of revenue are deposit account maintenance fees, investment advisory fees, merchant revenue and safe deposit box fees. Revenue is generally derived from transactional information accumulated by our systems or those of third-parties and is recognized as the related transactions occur or services are rendered to the customer.
The Company recognizes revenue from contracts with customers when it satisfies its performance obligations. The Company’s performance obligations are typically satisfied as services are rendered and our contracts generally do not include multiple performance obligations. As a result, there are no contract balances as payments and services are rendered simultaneously. Payment is generally collected at the time services are rendered, monthly or quarterly. Unsatisfied performance obligations at the report date are not material to our consolidated financial statements.
In certain cases, other parties are involved with providing products and services to our customers. If the Company is principal in the transaction (providing goods or services itself), revenues are reported based on the gross consideration received from the customer and any related expenses are reported gross in noninterest expense. If the Company is an agent in the transaction (arranging for another party to provide goods or services), the Company reports its net fee or commission retained as revenue.
Rebates, waivers and reversals are recorded as a reduction of the transaction price either when the revenue is recognized by the Company or at the time the rebate, waiver or reversal is earned by the customer.
Practical expedients
The Company applies the practical expedient in paragraph 606-10-32-18 and does not adjust the consideration from customers for the effects of a significant financing component if at contract inception the period between when the entity transfers the goods or services and when the customer pays for that good or service will be one year or less.
The Company pays sales commissions to its employees in accordance with certain incentive plans and in connection with obtaining certain contracts with customers. The Company applies the practical expedient in paragraph 340-40-25-4 and expenses such sales commissions when incurred if the amortization period of the asset the Company otherwise would have recognized is one year or less. Sales commissions are included in compensation and employee benefits expense.
For the Company’s contracts that have an original expected duration of one year or less, the Company uses the practical expedient in paragraph 606-10-50-14 and has not disclosed the amount of the transaction price allocated to unsatisfied performance obligations as of the end of each reporting period or when the Company expects to recognize this revenue.
The following table shows the disaggregation of revenue from contracts with customers for the period indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
 
(in thousands)
Noninterest income:
 
 
 
 
Revenue from contracts with customers:
 
 
 
 
Deposit account and treasury management fees
 
$
35,695

 
$
36,072

Card revenue
 
15,198

 
19,719

Financial services and trust revenue
 
12,799

 
12,135

Total revenue from contracts with customers
 
63,692

 
67,926

Other sources of noninterest income
 
33,489

 
20,330

Total noninterest income
 
$
97,181

 
$
88,256
v3.19.3.a.u2
Summary of Significant Accounting Policies (Policies)
 12 Months Ended
Dec. 31, 2019
Accounting Policies [Line Items]  
Consolidation
Consolidation
The Consolidated Financial Statements of the Company include the accounts of the Corporation and its subsidiaries, including the Bank and Columbia Trust. Intercompany balances and transactions have been eliminated in consolidation.
Cash and cash equivalents
Cash and cash equivalents
Cash and cash equivalents include cash and due from banks, and interest-bearing balances due from correspondent banks and the FRB. Cash equivalents have a maturity of 90 days or less at the time of purchase.
Securities
Securities
Securities are classified based on management’s intention on the date of purchase. All securities are classified as available for sale and are presented at fair value. Unrealized gains or losses on securities available for sale are excluded from net income but are included as separate components of other comprehensive income, net of taxes. Purchase premiums or discounts on securities available for sale are amortized or accreted into income using the interest method over the terms of the individual securities. The Company performs a quarterly assessment to determine whether a decline in fair value below amortized cost is other-than-temporary. Amortized cost includes adjustments made to the cost of an investment for accretion, amortization, collection of cash and previous other-than-temporary impairment recognized in earnings. Other-than-temporary impairment exists when it is more likely than not that the Company will be unable to recover the entire amortized cost basis of the security.
In performing the quarterly assessment for debt securities, management considers whether or not the Company expects to recover the entire amortized cost basis of the security. In addition, management also considers whether it is more likely than not that it will not have to sell the security before recovery of its cost basis. If the Company intends to sell a security or it is more likely than not it will be required to sell a security prior to recovery of its cost basis, the entire amount of impairment is recognized in earnings. If the Company does not intend to sell the security or it is not more likely than not it will be required to sell the security prior to recovery of its cost basis, the credit loss component of impairment is recognized in earnings and impairment associated with non-credit factors, such as market liquidity, is recognized in “Other comprehensive income (loss), net of tax.” A credit loss is the difference between the cost basis of the security and the present value of cash flows expected to be collected, discounted at the security’s effective interest rate at the date of acquisition. The cost basis of an other-than-temporarily impaired security is written down by the amount of impairment recognized in earnings. The new cost basis is not adjusted for subsequent recoveries in fair value. However, the difference between the new amortized cost basis and the cash flows expected to be collected is accreted as interest income. The total other-than-temporary impairment, if any, is presented in the Consolidated Statements of Income with a reduction for the amount of other-than-temporary impairment that is recognized in “Other Comprehensive Income,” if any.
Realized gains or losses on sales of securities available for sale are recorded using the specific identification method.
Federal Home Loan Bank Stock
Federal Home Loan Bank Stock
The Company holds shares of Class B stock issued by the FHLB, which has been designated as FHLB membership stock or FHLB activity based stock in accordance with the capital plan of the FHLB. Membership stock is stock we are required to purchase and hold as a condition of membership in the FHLB. The Company’s membership stock purchase requirement is measured as a percentage of our year end assets, subject to a $10 million cap. Class B stock may be redeemed, subject to certain limitations, on five years’ written notice to the FHLB. Activity based stock is stock we are required to purchase and hold in order to obtain an advance or participate in FHLB mortgage programs. The Company’s activity based stock purchase requirement is measured as a percentage of our advance proceeds. Our FHLB stock is carried at par value because the shares are issued, transferred, redeemed, and repurchased by the FHLB at a par value of $100. The FHLB stock is subject to recoverability testing per the Financial Services-Depository and Lending topic of the FASB ASC.
Loans held for sale
Loans held for sale
Mortgage loans held for sale are carried at the lower of amortized cost or fair value. Due to the short period of time between the origination and sale, the carrying amount of loans held for sale approximates the fair values.
Loans
Loans
Loans, excluding PCI loans, are generally carried at the unpaid principal balance, net of purchase premiums, purchase discounts and net deferred loan fees. Net deferred loan fees include nonrefundable loan origination fees less direct loan origination costs. Net deferred loan fees, purchase premiums and purchase discounts are amortized into interest income using either the interest method or straight-line method over the terms of the loans, adjusted for actual prepayments. The interest method is used for all loans except revolving loans, for which the straight-line method is used. Interest income is accrued as earned. Fees related to lending activities, other than the origination or purchase of loans, are recognized as noninterest income during the period the related services are performed.
Nonaccrual loans—Loans are placed on nonaccrual status when a loan becomes contractually past due 90 days with respect to interest or principal unless the loan is both well secured and in the process of collection, or if full collection of interest or principal becomes uncertain. When a loan is placed on nonaccrual status, any accrued and unpaid interest receivable is reversed and the amortization of net deferred loan fees, premiums and discounts ceases. The interest payments received on nonaccrual loans are generally accounted for on the cost-recovery method whereby the interest payment is applied to the principal balances. Loans may be returned to accrual status when improvements in credit quality eliminate the doubt as to the full collectability of both interest and principal and a period of sustained performance has occurred.
Impaired loans—Loans are considered impaired when based on current information and events, it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement or when a loan has been modified in a TDR. The assessment for impairment occurs when and while such loans are designated as classified per the Company’s internal risk rating system or when and while such loans are on nonaccrual. All nonaccrual loans greater than $500,000 and all TDR loans are considered impaired and analyzed individually on a quarterly basis. Classified loans with an outstanding balance greater than $500,000 are evaluated for potential impairment on a quarterly basis.
Restructured Loans—A loan is classified as a TDR when a borrower is experiencing financial difficulties that lead to a restructuring of the loan, and the Company grants concessions to the borrower in the restructuring that it would not otherwise consider. These concessions may include interest rate reductions, principal forgiveness, extension of maturity date and other actions intended to minimize potential losses. Generally, a nonaccrual loan that is restructured remains on nonaccrual status for a period of six months to demonstrate that the borrower can meet the restructured terms. If the borrower’s performance under the new terms is not reasonably assured, the loan remains classified as a nonaccrual loan.
Purchased Credit Impaired Loans—Loans acquired with evidence of credit deterioration since origination for which it is probable that all contractually required payments will not be collected are accounted for under ASC 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality. In addition, because of the significant discounts associated with certain of the acquired loan portfolios, the Company elected to account for those certain acquired loans under ASC 310-30.
In situations where such loans have similar risk characteristics, loans are aggregated into pools to estimate cash flows. A pool is accounted for as a single asset with a single interest rate, cumulative loss rate and cash flow expectation. Expected cash flows at the acquisition date in excess of the fair value of loans are considered to be accretable yield, which is recognized as interest income over the life of the loan pool using a level yield method if the timing and amount of the future cash flows of the pool is reasonably estimable. Subsequent to the acquisition date, any increases in cash flow over those expected at purchase date in excess of fair value are recorded as interest income prospectively. Any subsequent decreases in cash flow over those expected at purchase date due to credit deterioration are recognized by recording an ALLL on PCI loans. Any disposals of loans, including sales of loans, payments in full or foreclosures result in the removal of the loan from the loan pool at the carrying amount.
Unfunded loan commitments—Unfunded commitments are generally related to providing credit facilities to clients of the Bank and are not actively traded financial instruments. These unfunded commitments are disclosed as financial instruments with off-balance sheet risk in Note 18, “Commitments and Contingent Liabilities.”
Allowance for Loan and Lease Losses
Allowance for Loan and Lease Losses
The ALLL is an accounting estimate of incurred credit losses in our loan portfolio at the balance sheet date. The provision for loan and lease losses is the expense recognized in the Consolidated Statements of Income to adjust the allowance to the levels deemed appropriate by management, as measured by the Company’s credit loss estimation methodologies.
Loans Collectively Evaluated for Impairment—This measure of estimated credit losses is based upon the loss experience over a historical base period adjusted for a loss emergence period. The loss emergence period is an estimate of the period that it takes, on average, for us to identify the amount of loss incurred for a loan that has suffered a loss-causing event. Management then considers the effects of the following qualitative factors to ensure our allowance reflects the inherent losses in the loan portfolio:
•
Economic and business conditions;
•
Concentration of credit;
•
Lending management and staff;
•
Lending policies and procedures;
•
Loss and recovery trends;
•
Nature and volume of the portfolio;
•
Trends in problem loans, loan delinquencies and nonaccrual loans;
•
Quality of internal loan review; and
•
External factors.
These qualitative factors have a high degree of subjectivity and changes in any of the factors could have a significant impact on our calculation of the allowance. The qualitative adjustment by loan segment is based upon management's assessment of inherent losses within a range between the weighted historical loss factor by segment and the maximum consecutive quarterly losses in the relevant loss emergence period by segment over the historical base period.
Loan and lease losses are charged against the allowance when management believes the collectability of a loan balance is unlikely. Subsequent recoveries, if any, are credited to the allowance.
Loans Individually Evaluated for Impairment—This measure of estimated credit losses begins if, based upon current information and events, we believe it is probable that we will be unable to collect all amounts due according to the contractual terms of the loan agreement or when a loan has been modified in a TDR. When a loan has been identified as impaired, the amount of impairment will be measured using discounted cash flows, except when it is determined that the remaining source of repayment for the loan is the operation or liquidation of the underlying collateral. In these cases, the current fair value of the collateral, reduced by costs to sell, will be used in place of discounted cash flows. As a final alternative, the observable market price of the loan may be used to assess impairment. The Company predominately uses the fair value of collateral approach based upon a reliable valuation. When the measurement of the impaired loan is less than the recorded amount of the loan, an impairment is recognized by recording a charge-off to the allowance or by designating a specific reserve.
Purchased Credit Impaired Loans—The Company updates its cash flow projections for PCI loans accounted for under ASC 310-30 on a quarterly basis. Assumptions utilized in this process include projections related to probability of default, loss severity, prepayment and recovery lag. Projections related to probability of default and prepayment are calculated utilizing a loan migration analysis. The loan migration analysis is a matrix of probability that is used to estimate the probability of a loan pool transitioning into a particular delinquency state given its delinquency state at the re-measurement date. Loss severity factors are based upon either actual charge-off data within the loan pools or industry averages, and recovery lags are based upon the collateral within the loan pools.
Any decreases in expected cash flows after the acquisition date and subsequent measurement periods are recognized by recording a provision for loan losses. See “Purchased Credit Impaired Loans” under “Loans” for further discussion
Allowance for Unfunded Commitments and Letters of Credit
Unfunded Commitments and Letters of Credit—The allowance for unfunded commitments is maintained at a level believed by management to be sufficient to absorb estimated probable losses related to these unfunded credit facilities. The determination of the adequacy of the allowance is based on periodic evaluations of the unfunded credit facilities including an assessment of the probability of commitment usage, credit risk factors for loans outstanding to these same customers, and the terms and expiration dates of the unfunded credit facilities. The allowance for unfunded commitments is included in “Other liabilities” on the Consolidated Balance Sheets, with changes to the balance charged against noninterest expense.
Allowance for Credit Losses, Policy for Uncollectible Amounts
Adoption of Allowance for Credit Losses - ASC 326
In accordance with ASU 2016-13, the Company was required to adopt ASC 326 as of January 1, 2020. The allowance for credit losses under ASC 326 is an accounting estimate of expected losses over the contractual life of assets carried at amortized cost within the Company’s loan portfolio at the balance sheet date. The ASU requires a financial asset (or group of financial assets) measured at amortized cost to be presented at the net amount expected to be collected. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial asset to present the net carrying value at the amount expected to be collected on the financial asset.
The quantitative allowance is calculated using a discounted cash flow approach with a probability of default methodology. The probability of default is an assumption derived from regression models which determines the relationship between historical defaults and certain economic variables. The Company determines a reasonable and supportable forecast and applies that forecast to the model to determine defaults over the forecast period. Following the forecast period, the economic variables used to calculate the probability of default revert to a historical average. Other assumptions relevant to the discounted cash flow model to derive the quantitative allowance include the loss given default, which is the estimate of loss for a defaulted loan, and the discount rate applied to future cash flows. The model calculates the net present value of each loan using both the contractual and expected cash flows, respectively.
In addition to the quantitative portion of the allowance for credit losses, the Company also considers the effects of the following qualitative factors in its calculation of expected losses in the loan portfolio:
•
Economic and business conditions;
•
Concentration of credit;
•
Lending management and staff;
•
Lending policies and procedures;
•
Loss and recovery trends;
•
Nature and volume of the portfolio;
•
Trends in problem loans, loan delinquencies and nonaccrual loans;
•
Quality of internal loan review; and
•
External factors.
These qualitative factors are based in quantitative factors but also include a high degree of subjectivity and changes in any of the factors could have a significant impact on our calculation of the allowance.
Loans for which repayment is expected to be provided substantially through the operation or sale of collateral are considered collateral-dependent. The allowance for credit losses for collateral-dependent loans is measured on the basis of the fair value of the collateral when foreclosure is probable.
Premises and Equipment
Premises and Equipment
Land, buildings, leasehold improvements and equipment are stated at cost less accumulated depreciation and amortization. Gains or losses on dispositions are reflected in current operations. Expenditures for improvements and major renewals are capitalized, and ordinary maintenance, repairs and small purchases are charged to “Occupancy” expense in the Consolidated Statements of Income. Depreciation and amortization are computed based on the straight-line method over the estimated useful lives of the various classes of assets. The ranges of useful lives for the principal classes of assets are as follows:
Buildings and building improvements
5 to 39 years
Leasehold improvements
Term of lease or useful life, whichever is shorter
Furniture, fixtures and equipment
3 to 7 years
Vehicles
5 years
Computer software
3 to 5 years
Software
Software
Capitalized software is stated at cost, less accumulated amortization. Amortization is computed on a straight-line basis and charged to expense over the estimated useful life of the software, which is generally three years. Capitalized software is included in “Premises and equipment, net” in the Consolidated Balance Sheets.
Implementation Costs in a Cloud Computing Arrangement
Implementation Costs in a Cloud Computing Arrangement
Implementation costs incurred in a hosting arrangement that is a service contract are capitalized based on criteria in ASC 350-40. The capitalized costs are expensed over the term of the hosting arrangement. Capitalized implementation costs in a cloud computing arrangement are included in “Other assets” in the Consolidated Balance Sheets.
Other Real Estate Owned
Other Real Estate Owned
OREO is composed of real estate acquired by the Company through either foreclosure or deed in lieu of foreclosure in satisfaction of debt. At acquisition, OREO is recorded at fair value less estimated costs to sell. Any fair value adjustments at acquisition are charged to the allowance, or in the event of a write-up without previous losses charged to the allowance, a credit to earnings is recorded. The fair value of the OREO is based upon a current appraisal or a letter of intent to purchase. Losses that result from the ongoing periodic valuation of these properties are charged to the net cost of operation of OREO in the period in which they are identified. Improvements to OREO are capitalized and holding costs are charged to the net cost of operation of OREO as incurred.
Goodwill and Intangibles
Goodwill and Intangibles
Net assets of companies acquired in a business combination are recorded at fair value at the date of acquisition. Any excess of the purchase price over the fair value of net assets acquired, including identified intangible assets, is recognized as goodwill. Goodwill is reviewed for potential impairment annually, during the third quarter, or, more frequently, if events or circumstances indicate a potential impairment, at the reporting unit level. A reporting unit is an operating segment or one level below an operating segment for which discrete financial information is available and regularly reviewed by management. The Company consists of a single reporting unit. If the fair value of the reporting unit, including goodwill, is determined to be less than the carrying amount of the reporting unit, a further test is required to measure the amount of impairment. If an impairment loss exists, the carrying amount of goodwill is adjusted to a new cost basis. Subsequent reversal of a previously recognized goodwill impairment loss is prohibited.
Identified intangible assets are amortized on an accelerated basis over the period benefited. Intangible assets are also evaluated for impairment if events and circumstances indicate a possible impairment. Such evaluation is based on undiscounted cash flow projections. At December 31, 2019, intangible assets included in the Consolidated Balance Sheets principally consisted of CDI with an original estimated life of 10 years.
Leases
Leases
The Company determines if a lease is present at the inception of an agreement. Operating leases are capitalized at commencement and are discounted using the Company’s FHLB borrowing rate for a similar term borrowing unless the lease defines an implicit rate within the contract. Leases with original terms of less than 12 months are not capitalized. For operating leases existing prior to January 1, 2019, the rate for the remaining lease term as of January 1, 2019 was used. Right-of-use assets represent the Company’s right to use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Operating lease right-of-use assets and operating lease liabilities are recognized on the lease commencement date based on the present value of lease payments over the lease term. The lease term includes options to extend or terminate the lease if the Company is reasonably certain that an option will be exercised. Operating leases are included within “Other assets” in the Consolidated Balance Sheets. See Note 10, “Leases” for additional information on leases.
Income Taxes
Income Taxes
The provision for income taxes includes current and deferred income tax expense on net income adjusted for temporary and permanent differences such as interest income from state and municipal securities and investments in affordable housing tax credits. Deferred tax assets and liabilities are recognized for the expected future tax consequences of existing temporary differences between the financial reporting and tax reporting basis of assets and liabilities using enacted tax laws and rates. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. On a quarterly basis, management evaluates deferred tax assets to determine if these tax benefits are expected to be realized in future periods. This determination is based on facts and circumstances, including the Company’s current and future tax outlook. To the extent a deferred tax asset is no longer considered “more likely than not” to be realized, a valuation allowance is established.
We recognize the tax benefit from uncertain tax positions only if it is more likely than not that the tax positions will be sustained on examination by the tax authorities, based on the technical merits of the position. The tax benefit is measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. We recognize interest and penalties related to unrecognized tax benefits in “Provision for income taxes” in the Consolidated Statements of Income.
Advertising
Advertising
Advertising costs are generally expensed as incurred.
Earnings per Common Share
Earnings per Common Share
The Company’s capital structure includes common shares, restricted common share awards, common share options, and, during a portion of 2017, convertible preferred shares. Restricted common share awards participate in dividends declared on common shares at the same rate as common shares. Convertible preferred shares participated in dividends declared on common shares on an “as if converted” basis. Restricted common share awards and convertible preferred shares are considered participating securities under the EPS topic of the FASB ASC.
The Company calculates EPS using the two-class method. The two-class method is an earnings allocation formula that treats a participating security as having rights to earnings that otherwise would have been available to common shareholders but does not require the presentation of basic and diluted EPS for securities other than common shares. Under the two-class method, basic EPS is computed by dividing earnings allocated to common shareholders by the weighted average number of common shares outstanding for the period. Earnings allocated to common shareholders represents net income reduced by earnings allocated to participating securities. Diluted EPS is computed in the same manner as basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding if certain shares issuable upon exercise of common share options were included unless those additional shares would have been anti-dilutive. For the diluted EPS computation, the treasury stock method is applied and compared to the two-class method and whichever method results in a more dilutive impact is utilized to calculate diluted EPS.
Share-Based Payment
Share-Based Payment
The Company accounts for stock options and stock awards in accordance with the Compensation—Stock Compensation topic of the FASB ASC. Authoritative guidance requires the Company to measure the cost of employee services received in exchange for an award of equity instruments, such as stock options or stock awards, based on the fair value of the award on the grant date. This cost must be recognized in the Consolidated Statements of Income over the vesting period of the award.
The Company issues restricted common share awards which generally vest over a four-year period and have full voting rights. Pursuant to our new equity incentive plan approved in 2018, for any awards issued under the new plan, the holder accrues dividends, which are paid out when the shares vest. For any awards granted prior to the new plan, the holder receives dividends whether or not the shares have vested. Restricted stock is valued at the closing price of the Company’s stock on the date of an award.
Derivatives and Hedging Activities
Derivatives and Hedging Activities
In accordance with the Derivatives and Hedging topic of the FASB ASC, the Company recognizes derivatives as assets or liabilities on the Consolidated Balance Sheets at their fair value. The Company periodically enters into interest rate contracts with customers and offsetting contracts with third parties. As these interest rate contracts are not designated as hedges under the Derivatives and Hedging topic of the FASB ASC, the changes in fair value of these instruments are recognized immediately in earnings.
As part of the Company’s overall interest rate risk management, the Company uses an interest rate collar with a notional amount of $500.0 million to mitigate interest rate risk. This collar is designated and qualifies as a cash flow hedge. Gains and losses are recorded in accumulated other comprehensive income to the extent the hedge is effective. Gains and losses are reclassified from accumulated other comprehensive income to earnings in the period the hedged transaction affects earnings and are included in the same income statement line item that the hedged transaction is recorded.
Accounting Pronouncements Recently Adopted or Issued
Accounting Pronouncements Recently Adopted or Issued
Accounting Standards Adopted in 2019
In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The amendments included in this ASU create a new accounting model for both lessees and lessors. The new guidance requires lessees to recognize lease liabilities, initially measured at the present value of future lease payments, and corresponding right-of-use assets for all leases with lease terms greater than 12 months. The new lease model differs from the old lease accounting model, as the old model does not require such lease liabilities and corresponding right-of-use assets to be recorded for operating leases. The amendments in ASU 2016-02 must be adopted using the modified retrospective approach and will be effective for the first interim or annual period beginning after December 15, 2018. The FASB subsequently issued ASU 2018-11, which allows for an additional (optional) transition method. The Company adopted the new standard effective January 1, 2019 utilizing the transition method allowed under ASU 2018-11 and did not restate comparative periods. The Company elected the package of practical expedients permitted under the transition guidance, which allowed us to carryforward our historical lease classifications and our assessment on whether a contract is or contains a lease. We also elected to keep leases with an initial term of 12 months or less off the balance sheet. The adoption of the new standard resulted in an increase in other assets and an increase in other liabilities of $49.2 million and $48.2 million, respectively. The Company recognized a cumulative effect adjustment of $782 thousand to increase the beginning balance of retained earnings related to previous deferred gains on sale-leaseback transactions.

In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The amendments also require the entity to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement, including reasonably certain renewal periods. The amendments in ASU 2018-15 are effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The amendments can be adopted on a prospective or retrospective basis. The Company adopted the new standard effective July 1, 2019 on a prospective basis. The adoption of the new standard resulted in an increase in other assets of $1.5 million.
Recently Issued Accounting Standards, Not Yet Adopted
In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes. The guidance issued in this update simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in ASC 740 related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition for deferred tax liabilities for outside basis differences. This ASU also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill. The ASU is effective for interim and annual reporting periods beginning after December 15, 2020; early adoption is permitted. The adoption of this ASU is not expected to have a material impact on the Company’s consolidated financial statements.
In April 2019, the FASB issued ASU 2019-04, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, Topic 815, Derivatives and Hedging, and Topic 825, Financial Instruments. The amendments in this ASU clarify certain aspects of accounting for credit losses, hedging activities, and financial instruments (addressed by ASUs 2016-01, 2016-13, and 2017-12). Many of the amendments reflect decisions reached at FASB meetings or meetings of the Board’s credit losses transition resource group. Topics covered in this ASU include: accrued interest, transfers between classifications or categories for loans and debt securities, recoveries, reinsurance recoverables, projections of interest rate environments for variable-rate financial instruments, costs to sell when foreclosure is probable, consideration of expected prepayments when determining the effective interest rate, vintage disclosures, extension and renewal options, etc.
In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) - Measurement of Credit Losses on Financial Instruments. The amendments included in this ASU require an entity to reflect its current estimate of all expected credit losses for assets held at an amortized cost basis. For available for sale debt securities, credit losses will be measured in a manner similar to current GAAP, however, this ASU requires that credit losses be presented as an allowance rather than as a write-down. In November 2019, the FASB subsequently issued ASU 2019-11, Codification Improvements to Topic 326, Financial Instruments - Credit Losses. The amendments in the Update require entities to include expected recoveries of the amortized cost basis previously written-off or expected to be written-off in the valuation account for purchased financial assets with credit deterioration. In addition, the amendments in this Update clarify and improve various aspects of the guidance for ASU 2016-13.
Unlike the incurred loss models, the CECL model in ASU 2016-13 does not specify a threshold for the recognition of an impairment allowance. Rather, the Company recognizes an impairment allowance equal to its estimate of lifetime expected credit losses, adjusted for prepayments, for in-scope financial instruments. Accordingly, the impairment allowance measured under the CECL model may change significantly from the impairment allowance measured under the Company’s incurred loss model. The Company engaged a third-party vendor to assist in the CECL calculation and has developed and implemented an internal governance framework. The amendments in ASU 2016-13 and the above ASUs related to Credit Losses are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption was permitted, including adoption in any interim period. The Company adopted the new standards, using a modified retrospective approach, effective January 1, 2020, which resulted in an increase of $1.6 million to its allowance for credit losses, an increase of $1.6 million to its allowance for unfunded commitments and letters of credit and a net-of-tax cumulative-effect adjustment of $2.5 million to decrease the beginning balance of retained earnings.
In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This ASU adds, eliminates and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. The ASU is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the added disclosure requirements until their effective date. The Company adopted the new standard effective January 1, 2020. As the ASU only revised disclosure requirements, adoption of this ASU did not have a material impact on the Company’s consolidated financial statements.
v3.19.3.a.u2
Business Combinations (Tables) - Pacific Continental [Member]
 12 Months Ended
Dec. 31, 2019
Business Acquisition [Line Items]  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
The table below summarizes the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed:
 
 
November 1, 2017
 
 
(in thousands)
Merger consideration
 
 
 
$
637,103

Identifiable net assets acquired, at fair value
 
 
 
 
Assets acquired
 
 
 
 
Cash and cash equivalents
 
$
81,190

 
 
Investment securities
 
449,291

 
 
FHLB stock
 
7,084

 
 
Loans
 
1,873,987

 
 
Interest receivable
 
7,827

 
 
Premises and equipment
 
27,343

 
 
OREO
 
10,279

 
 
CDI
 
46,875

 
 
Other assets
 
50,638

 
 
Total assets acquired
 
 
 
2,554,514

Liabilities assumed
 
 
 
 
Deposits
 
(2,118,982
)
 
 
FHLB advances
 
(101,127
)
 
 
Subordinated debentures
 
(35,678
)
 
 
Junior subordinated debentures
 
(14,434
)
 
 
Securities sold under agreements to repurchase
 
(1,617
)
 
 
Other liabilities
 
(28,653
)
 
 
Total liabilities assumed
 
 
 
(2,300,491
)
Total fair value of identifiable net assets
 
 
 
254,023

Goodwill
 
 
 
$
383,080
Business Acquisition, Pro Forma Information [Table Text Block]
For illustrative purposes only, the following table presents certain unaudited pro forma information for the year ended December 31, 2017. This unaudited, estimated pro forma financial information was calculated as if Pacific Continental had been acquired as of the beginning of the year prior to the date of acquisition. This unaudited pro forma information combines the historical results of Pacific Continental 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 acquisition occurred as of the beginning of the year prior to the acquisition. In particular, no adjustments have been made to eliminate the impact of other-than-temporary impairment losses and losses recognized on the sale of securities that may not have been necessary had the investment securities been recorded at fair value as of the beginning of the year prior to the date of acquisition. The unaudited pro forma information does not consider any changes to the provision for credit losses resulting from recording loan assets at fair value. Additionally, Columbia expects to achieve further operating cost savings and other business synergies, including revenue growth as a result of the acquisition, which are not reflected in the pro forma amounts that follow. As a result, actual amounts would have differed from the unaudited pro forma information presented.
 
 
Unaudited Pro Forma for the
 
 
Year Ended December 31,
 
 
2017
 
 
(in thousands, except per share amounts)
Total revenues (net interest income plus noninterest income)
 
$
571,944

Net income
 
$
149,859

EPS - basic
 
$
2.23

EPS - diluted
 
$
2.23
Business Acquisition, Integration, Restructuring and Other Related Costs [Text Block]
The following table shows the impact of the acquisition-related expenses related to the acquisition of Pacific Continental for the periods indicated to the various components of noninterest expense:
 
 
Years ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Noninterest Expense
 
 
 
 
 
 
Compensation and employee benefits
 
$
—

 
$
3,620

 
$
8,014

Occupancy
 
—

 
1,619

 
1,912

Data processing
 
—

 
963

 
1,555

Legal and professional fees
 
—

 
1,028

 
4,618

Advertising and promotion
 
—

 
537

 
467

Other
 
—

 
894

 
630

Total impact of acquisition-related costs to noninterest expense
 
$
—

 
$
8,661

 
$
17,196
v3.19.3.a.u2
Securities (Tables)
 12 Months Ended
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]  
Securities Available for Sale
The following table summarizes the amortized cost, gross unrealized gains and losses and the resulting fair value of debt securities available for sale:
 
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 
Fair Value
December 31, 2019
 
(in thousands)
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
2,864,949

 
$
47,223

 
$
(19,222
)
 
$
2,892,950

Other asset-backed securities (1)
 
194,563

 
2,476

 
(989
)
 
196,050

State and municipal securities
 
478,366

 
10,660

 
(224
)
 
488,802

U.S. government agency and government-sponsored enterprise securities
 
165,218

 
3,127

 
(5
)
 
168,340

Total
 
$
3,703,096

 
$
63,486

 
$
(20,440
)
 
$
3,746,142

December 31, 2018
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
2,045,728

 
$
8,473

 
$
(40,846
)
 
$
2,013,355

Other asset-backed securities (1)
 
176,793

 
763

 
(2,621
)
 
174,935

State and municipal securities
 
579,755

 
2,328

 
(7,760
)
 
574,323

U.S. government agency and government-sponsored enterprise securities
 
408,088

 
1,235

 
(4,736
)
 
404,587

U.S. government securities
 
251

 
—

 
(3
)
 
248

Total
 
$
3,210,615

 
$
12,799

 
$
(55,966
)
 
$
3,167,448


__________
(1) Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
Schedule of gross realized gains and losses on sales and calls of securities available for sale [Table Text Block]
The following table provides the proceeds and both gross realized gains and losses on the sales and calls of debt securities available for sale as well as other securities gains and losses for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Proceeds from sales and calls of debt securities available for sale
 
$
259,554

 
$
32,330

 
$
30,403

 
 
 
 
 
 
 
Gross realized gains from sales of debt securities available for sale
 
$
3,357

 
$
235

 
$
111

Gross realized losses from sales of debt securities available for sale
 
(1,225
)
 
(129
)
 
(122
)
Other securities losses, net (1)
 
—

 
(195
)
 
—

Investment securities gains (losses), net
 
$
2,132

 
$
(89
)
 
$
(11
)
__________
(1) Other securities losses, net includes net unrealized loss activity associated with equity securities.
Schedule of Contractual Maturities of Investment Securities Available for Sale
The scheduled contractual maturities of debt securities available for sale at December 31, 2019 are presented as follows:
 
 
December 31, 2019
 
 
Amortized Cost
 
Fair Value
 
 
(in thousands)
Due within one year
 
$
77,363

 
$
77,538

Due after one year through five years
 
416,556

 
421,363

Due after five years through ten years
 
2,007,225

 
2,041,751

Due after ten years
 
1,201,952

 
1,205,490

Total debt securities available for sale
 
$
3,703,096

 
$
3,746,142
Schedule of Securities pledged as collateral [Table Text Block]
The following table summarizes the carrying value of securities pledged as collateral to secure public deposits, borrowings and other purposes as permitted or required by law:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
To secure public funds
 
$
323,055

 
$
276,343

To secure borrowings
 
111,488

 
52,303

Other securities pledged
 
154,030

 
138,492

Total securities pledged as collateral
 
$
588,573

 
$
467,138
Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses
The following tables show the gross unrealized losses and fair value of the Company’s debt securities available for sale with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at December 31, 2019 and 2018:
 
 
Less than 12 Months
 
12 Months or More
 
Total
 
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
December 31, 2019
 
(in thousands)
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
1,055,903

 
$
(12,424
)
 
$
491,539

 
$
(6,798
)
 
$
1,547,442

 
(19,222
)
Other asset-backed securities (1)
 
89,508

 
(880
)
 
6,799

 
(109
)
 
96,307

 
(989
)
State and municipal securities
 
12,363

 
(142
)
 
12,587

 
(82
)
 
24,950

 
(224
)
U.S. government agency and government-sponsored enterprise securities
 
—

 
—

 
10,495

 
(5
)
 
10,495

 
(5
)
Total
 
$
1,157,774

 
$
(13,446
)
 
$
521,420

 
$
(6,994
)
 
$
1,679,194

 
$
(20,440
)
December 31, 2018
 
 
 
 
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
114,551

 
$
(750
)
 
$
1,207,020

 
$
(40,096
)
 
$
1,321,571

 
$
(40,846
)
Other asset-backed securities (1)
 
40,071

 
(222
)
 
94,367

 
(2,399
)
 
134,438

 
(2,621
)
State and municipal securities
 
106,292

 
(581
)
 
280,496

 
(7,179
)
 
386,788

 
(7,760
)
U.S. government agency and government-sponsored enterprise securities
 
15,392

 
(45
)
 
291,435

 
(4,691
)
 
306,827

 
(4,736
)
U.S. government securities
 
—

 
—

 
247

 
(3
)
 
247

 
(3
)
Total
 
$
276,306

 
$
(1,598
)
 
$
1,873,565

 
$
(54,368
)
 
$
2,149,871

 
$
(55,966
)
__________
(1) Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
v3.19.3.a.u2
Loans (Tables)
 12 Months Ended
Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]  
Analysis of Loan Portfolio by Major Types of Loans
The following is an analysis of the loan portfolio by segment (net of unearned income):
 
 
December 31,
 
 
2019
 
2018
 
 
Loans, excluding PCI loans
 
PCI Loans
 
Total
 
Loans, excluding PCI loans
 
PCI Loans
 
Total
 
 
(in thousands)
Commercial business
 
$
3,602,597

 
$
7,863

 
$
3,610,460

 
$
3,438,422

 
$
9,240

 
$
3,447,662

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
265,144

 
7,203

 
272,347

 
238,367

 
8,017

 
246,384

Commercial and multifamily residential
 
4,183,961

 
54,212

 
4,238,173

 
3,846,027

 
62,910

 
3,908,937

Total real estate
 
4,449,105

 
61,415

 
4,510,520

 
4,084,394

 
70,927

 
4,155,321

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
192,762

 
—

 
192,762

 
217,790

 
153

 
217,943

Commercial and multifamily residential
 
163,103

 
—

 
163,103

 
284,394

 
534

 
284,928

Total real estate construction
 
355,865

 
—

 
355,865

 
502,184

 
687

 
502,871

Consumer
 
292,697

 
8,238

 
300,935

 
318,945

 
8,906

 
327,851

Less: Net unearned income
 
(34,315
)
 
—

 
(34,315
)
 
(42,194
)
 
—

 
(42,194
)
Total loans, net of unearned income
 
8,665,949

 
77,516

 
8,743,465

 
8,301,751

 
89,760

 
8,391,511

Less: ALLL
 
(81,124
)
 
(2,844
)
 
(83,968
)
 
(79,758
)
 
(3,611
)
 
(83,369
)
Total loans, net
 
$
8,584,825

 
$
74,672

 
$
8,659,497

 
$
8,221,993

 
$
86,149

 
$
8,308,142

Loans held for sale
 
$
17,718

 
$
—

 
$
17,718

 
$
3,849

 
$
—

 
$
3,849
Analysis of Nonaccrual Loans
The following is an analysis of nonaccrual loans as of December 31, 2019 and 2018:
 
 
December 31,
 
 
2019
 
2018
 
 
Recorded
Investment
Nonaccrual
Loans
 
Unpaid Principal
Balance
Nonaccrual
Loans
 
Recorded
Investment
Nonaccrual
Loans
 
Unpaid Principal
Balance
Nonaccrual
Loans
 
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
Secured
 
$
26,615

 
$
38,278

 
$
35,504

 
$
45,072

Unsecured
 
359

 
360

 
9

 
9

Real estate:
 
 
 
 
 
 
 
 
One-to-four family residential
 
591

 
632

 
1,158

 
1,178

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
Commercial land
 
1,985

 
1,994

 
2,261

 
2,270

Income property
 
205

 
206

 
2,721

 
3,062

Owner occupied
 
1,287

 
1,325

 
9,922

 
10,300

Real estate construction:
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
Land and acquisition
 
—

 
—

 
318

 
318

Residential construction
 
—

 
59

 
—

 
—

Consumer
 
2,018

 
2,355

 
2,949

 
3,149

Total
 
$
33,060

 
$
45,209

 
$
54,842

 
$
65,358
Loans, Excluding Purchased Credit Impaired Loans [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
Analysis of the Aged Loan Portfolio
The following is an aging of the recorded investment of the loan portfolio as of December 31, 2019 and 2018:
 
 
Current
Loans
 
30 - 59
Days
Past Due
 
60 - 89
Days
Past Due
 
Greater
than 90
Days Past
Due
 
Total
Past Due
 
Nonaccrual
Loans
 
Total Loans
December 31, 2019
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,422,313

 
$
7,684

 
$
5,035

 
$
—

 
$
12,719

 
$
26,615

 
$
3,461,647

Unsecured
 
128,852

 
392

 
80

 
—

 
472

 
359

 
129,683

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
261,886

 
2,162

 
256

 
—

 
2,418

 
591

 
264,895

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
300,580

 
625

 
—

 
—

 
625

 
1,985

 
303,190

Income property
 
2,057,359

 
1,797

 
—

 
—

 
1,797

 
205

 
2,059,361

Owner occupied
 
1,795,771

 
4,287

 
—

 
—

 
4,287

 
1,287

 
1,801,345

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
1,364

 
—

 
—

 
—

 
—

 
—

 
1,364

Residential construction
 
189,350

 
951

 
—

 
—

 
951

 
—

 
190,301

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
88,389

 
—

 
—

 
—

 
—

 
—

 
88,389

Owner occupied
 
73,203

 
—

 
—

 
—

 
—

 
—

 
73,203

Consumer
 
290,174

 
284

 
95

 
—

 
379

 
2,018

 
292,571

Total
 
$
8,609,241

 
$
18,182

 
$
5,466

 
$
—

 
$
23,648

 
$
33,060

 
$
8,665,949

 
 
Current
Loans
 
30 - 59
Days
Past Due
 
60 - 89
Days
Past Due
 
Greater
than 90
Days Past
Due
 
Total
Past Due
 
Nonaccrual
Loans
 
Total Loans
December 31, 2018
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,267,709

 
$
5,864

 
$
3,624

 
$
—

 
$
9,488

 
$
35,504

 
$
3,312,701

Unsecured
 
111,868

 
240

 
—

 
—

 
240

 
9

 
112,117

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
233,941

 
694

 
233

 
—

 
927

 
1,158

 
236,026

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
283,416

 
—

 
—

 
—

 
—

 
2,261

 
285,677

Income property
 
1,910,505

 
5,009

 
2,241

 
—

 
7,250

 
2,721

 
1,920,476

Owner occupied
 
1,606,085

 
1,744

 
—

 
—

 
1,744

 
9,922

 
1,617,751

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
4,099

 
—

 
—

 
—

 
—

 
318

 
4,417

Residential construction
 
212,303

 
93

 
—

 
—

 
93

 
—

 
212,396

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
194,912

 
—

 
—

 
—

 
—

 
—

 
194,912

Owner occupied
 
79,805

 
7,258

 
—

 
—

 
7,258

 
—

 
87,063

Consumer
 
314,008

 
1,057

 
201

 
—

 
1,258

 
2,949

 
318,215

Total
 
$
8,218,651

 
$
21,959

 
$
6,299

 
$
—

 
$
28,258

 
$
54,842

 
$
8,301,751
Impaired Financing Receivables
The following is an analysis of the impaired loans (see Note 1, “Summary of Significant Accounting Policies,”) as of December 31, 2019 and 2018:
 
 
Recorded Investment
of Loans
Collectively Measured
for Contingency
Provision
 
Recorded Investment
of Loans
Individually
Measured for
Specific
Impairment
 
Impaired Loans With
Recorded Allowance
 
Impaired Loans Without
Recorded Allowance
 
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Allowance
 
Recorded
Investment
 
Unpaid
Principal
Balance
December 31, 2019
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,437,564

 
$
24,083

 
$
3,286

 
$
3,851

 
$
93

 
$
20,797

 
$
28,658

Unsecured
 
129,671

 
12

 
12

 
12

 
—

 
—

 
—

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
264,513

 
382

 
299

 
588

 
5

 
83

 
182

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
300,973

 
2,217

 
1,592

 
1,601

 
312

 
625

 
663

Income property
 
2,059,361

 
—

 
—

 
—

 
—

 
—

 
—

Owner occupied
 
1,797,682

 
3,663

 
3,663

 
5,233

 
29

 
—

 
—

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
1,364

 
—

 
—

 
—

 
—

 
—

 
—

Residential construction
 
190,301

 
—

 
—

 
—

 
—

 
—

 
—

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
88,389

 
—

 
—

 
—

 
—

 
—

 
—

Owner occupied
 
73,203

 
—

 
—

 
—

 
—

 
—

 
—

Consumer
 
290,934

 
1,637

 
483

 
637

 
22

 
1,154

 
1,310

Total
 
$
8,633,955

 
$
31,994

 
$
9,335

 
$
11,922

 
$
461

 
$
22,659

 
$
30,813

 
 
 
Recorded Investment
of Loans
Collectively Measured
for Contingency
Provision
 
Recorded Investment
of Loans
Individually
Measured for
Specific
Impairment
 
Impaired Loans With
Recorded Allowance
 
Impaired Loans Without
Recorded Allowance
 
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Allowance
 
Recorded
Investment
 
Unpaid
Principal
Balance
December 31, 2018
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,286,416

 
$
26,285

 
$
6,350

 
$
8,460

 
$
2,023

 
$
19,935

 
$
24,404

Unsecured
 
112,097

 
20

 
20

 
20

 
—

 
—

 
—

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
235,138

 
888

 
325

 
798

 
8

 
563

 
575

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
283,451

 
2,226

 
—

 
—

 
—

 
2,226

 
2,272

Income property
 
1,917,522

 
2,954

 
99

 
165

 
1

 
2,855

 
3,011

Owner occupied
 
1,605,042

 
12,709

 
3,231

 
4,666

 
69

 
9,478

 
9,750

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
4,417

 
—

 
—

 
—

 
—

 
—

 
—

Residential construction
 
212,396

 
—

 
—

 
—

 
—

 
—

 
—

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
194,912

 
—

 
—

 
—

 
—

 
—

 
—

Owner occupied
 
87,063

 
—

 
—

 
—

 
—

 
—

 
—

Consumer
 
314,193

 
4,022

 
3,326

 
3,584

 
31

 
696

 
704

Total
 
$
8,252,647

 
$
49,104

 
$
13,351

 
$
17,693

 
$
2,132

 
$
35,753

 
$
40,716


The following table provides additional information on impaired loans for the years ended December 31, 2019, 2018 and 2017:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
Average Recorded
Investment
Impaired Loans 
 
Interest Recognized
on
Impaired Loans
 
Average Recorded
Investment
Impaired Loans 
 
Interest Recognized
on
Impaired Loans
 
Average Recorded
Investment
Impaired Loans 
 
Interest Recognized
on
Impaired Loans
 
 
(in thousands)
Commercial business
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
24,682

 
$
202

 
$
39,701

 
$
81

 
$
20,282

 
$
60

Unsecured
 
16

 
1

 
191

 
2

 
5

 
—

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
665

 
42

 
748

 
42

 
730

 
49

Commercial and multifamily residential
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
2,606

 
31

 
2,371

 
34

 
2,079

 
—

Income property
 
1,121

 
—

 
3,284

 
130

 
4,314

 
51

Owner occupied
 
10,681

 
168

 
9,730

 
720

 
5,335

 
445

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
—

 
—

 
—

 
—

 
3

 
—

Residential construction
 
—

 
—

 
484

 
—

 
309

 
—

Owner occupied
 
—

 
—

 
3,240

 
—

 
1,620

 
203

Consumer
 
2,960

 
8

 
5,712

 
129

 
5,973

 
163

Total
 
$
42,731

 
$
452

 
$
65,461

 
$
1,138

 
$
40,650

 
$
971
Analysis of loans classified as Troubled Debt Restructurings (“TDR”)
The following is an analysis of loans classified as TDR for the years ended December 31, 2019, 2018 and 2017:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
Number of TDR Modifications
 
Pre-Modification
Outstanding
Recorded
Investment
 
Post-Modification
Outstanding
Recorded
Investment
 
Number of TDR Modifications
 
Pre-Modification
Outstanding
Recorded
Investment
 
Post-Modification
Outstanding
Recorded
Investment
 
Number of TDR Modifications
 
Pre-Modification
Outstanding
Recorded
Investment
 
Post-Modification
Outstanding
Recorded
Investment
 
 
(dollars in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
11

 
$
6,642

 
$
6,642

 
12

 
$
18,379

 
$
18,379

 
10

 
$
5,655

 
$
5,655

Unsecured
 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
26

 
26

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
1

 
45

 
45

 
—

 
—

 
—

 
3

 
583

 
583

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
687

 
687

Income property
 
1

 
217

 
217

 
1

 
891

 
891

 
1

 
1,152

 
1,152

Owner occupied
 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
78

 
78

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Owner occupied
 
—

 
—

 
—

 
—

 
—

 
—

 
1

 
4,050

 
4,050

Consumer
 
11

 
444

 
444

 
21

 
2,777

 
2,777

 
42

 
5,891

 
5,891

Total
 
24

 
$
7,348

 
$
7,348

 
34

 
$
22,047

 
$
22,047

 
60

 
$
18,122

 
$
18,122
Purchased Credit Impaired Loans [Member]  
Financing Receivable, Credit Quality Indicator [Line Items]  
Analysis of Loan Portfolio by Major Types of Loans
The following is an analysis of our PCI loans, net of related allowance for losses and remaining valuation discounts as of December 31, 2019 and 2018:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
Commercial business
 
$
8,083

 
$
9,672

Real estate:
 
 
 
 
One-to-four family residential
 
8,453

 
9,848

Commercial and multifamily residential
 
56,752

 
66,340

Total real estate
 
65,205

 
76,188

Real estate construction:
 
 
 
 
One-to-four family residential
 
—

 
153

Commercial and multifamily residential
 
—

 
507

Total real estate construction
 
—

 
660

Consumer
 
8,984

 
9,765

Subtotal of PCI loans
 
82,272

 
96,285

Less:
 
 
 
 
Valuation discount resulting from acquisition accounting
 
4,756

 
6,525

ALLL
 
2,844

 
3,611

PCI loans, net of valuation discounts and allowance for loan losses
 
$
74,672

 
$
86,149
Changes in Accretable Yield for Acquired Loans [Table Text Block]
The following table shows the changes in accretable yield for acquired loans for the years ended December 31, 2019, 2018, and 2017:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Balance at beginning of period
 
$
21,949

 
$
31,176

 
$
45,191

Accretion
 
(6,053
)
 
(8,194
)
 
(12,357
)
Disposals
 
46

 
(387
)
 
(158
)
Reclassifications from (to) nonaccretable difference
 
3,719

 
(646
)
 
(1,500
)
Balance at end of period
 
$
19,661

 
$
21,949

 
$
31,176
v3.19.3.a.u2
Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Tables)
 12 Months Ended
Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]  
Changes in the Allowance for Loan and Lease Losses
The following tables show a detailed analysis of the ALLL for the years ended December 31, 2019, 2018 and 2017:
 
 
Beginning
Balance
 
Charge-offs
 
Recoveries
 
Provision (Recapture)
 
Ending
Balance
 
Specific
Reserve
 
General
Allocation
Year Ended December 31, 2019
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
43,188

 
$
(10,249
)
 
$
2,755

 
$
7,381

 
$
43,075

 
$
93

 
$
42,982

Unsecured
 
2,626

 
(75
)
 
350

 
184

 
3,085

 
—

 
3,085

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
593

 
(2
)
 
242

 
(226
)
 
607

 
5

 
602

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
3,947

 
—

 
286

 
2,146

 
6,379

 
312

 
6,067

Income property
 
4,044

 
—

 
320

 
2,062

 
6,426

 
—

 
6,426

Owner occupied
 
4,533

 
—

 
4

 
1,567

 
6,104

 
29

 
6,075

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
549

 
—

 
362

 
(799
)
 
112

 
—

 
112

Residential construction
 
5,536

 
(170
)
 
3,092

 
(3,982
)
 
4,476

 
—

 
4,476

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
5,784

 
—

 
1

 
(3,286
)
 
2,499

 
—

 
2,499

Owner occupied
 
2,604

 
—

 
—

 
702

 
3,306

 
—

 
3,306

Consumer
 
5,301

 
(1,400
)
 
930

 
(376
)
 
4,455

 
22

 
4,433

PCI
 
3,611

 
(3,319
)
 
3,979

 
(1,427
)
 
2,844

 
—

 
2,844

Unallocated
 
1,053

 
—

 
—

 
(453
)
 
600

 
—

 
600

Total
 
$
83,369

 
$
(15,215
)
 
$
12,321

 
$
3,493

 
$
83,968

 
$
461

 
$
83,507

 
 
Beginning
Balance
 
Charge-offs
 
Recoveries
 
Provision (Recapture)
 
Ending
Balance
 
Specific
Reserve
 
General
Allocation
Year Ended December 31, 2018
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
29,341

 
$
(11,560
)
 
$
3,024

 
$
22,383

 
$
43,188

 
$
2,023

 
$
41,165

Unsecured
 
2,000

 
(159
)
 
403

 
382

 
2,626

 
—

 
2,626

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
701

 
—

 
408

 
(516
)
 
593

 
8

 
585

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
4,265

 
—

 
99

 
(417
)
 
3,947

 
—

 
3,947

Income property
 
5,672

 
(780
)
 
912

 
(1,760
)
 
4,044

 
1

 
4,043

Owner occupied
 
5,459

 
—

 
20

 
(946
)
 
4,533

 
69

 
4,464

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
963

 
—

 
726

 
(1,140
)
 
549

 
—

 
549

Residential construction
 
3,709

 
—

 
890

 
937

 
5,536

 
—

 
5,536

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
7,053

 
—

 
—

 
(1,269
)
 
5,784

 
—

 
5,784

Owner occupied
 
4,413

 
—

 
—

 
(1,809
)
 
2,604

 
—

 
2,604

Consumer
 
5,163

 
(1,194
)
 
1,180

 
152

 
5,301

 
31

 
5,270

PCI
 
6,907

 
(4,862
)
 
3,847

 
(2,281
)
 
3,611

 
—

 
3,611

Unallocated
 
—

 
—

 
—

 
1,053

 
1,053

 
—

 
1,053

Total
 
$
75,646

 
$
(18,555
)
 
$
11,509

 
$
14,769

 
$
83,369

 
$
2,132

 
$
81,237


 
 
Beginning
Balance
 
Charge-offs
 
Recoveries
 
Provision (Recapture)
 
Ending
Balance
 
Specific
Reserve
 
General
Allocation
Year Ended December 31, 2017
 
(in thousands)
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
36,050

 
$
(7,524
)
 
$
4,283

 
$
(3,468
)
 
$
29,341

 
$
1,867

 
$
27,474

Unsecured
 
960

 
(89
)
 
553

 
576

 
2,000

 
3

 
1,997

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
599

 
(460
)
 
568

 
(6
)
 
701

 
103

 
598

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
1,797

 
—

 
53

 
2,415

 
4,265

 
—

 
4,265

Income property
 
7,342

 
(287
)
 
498

 
(1,881
)
 
5,672

 
185

 
5,487

Owner occupied
 
6,439

 
—

 
124

 
(1,104
)
 
5,459

 
3

 
5,456

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
316

 
(14
)
 
72

 
589

 
963

 
—

 
963

Residential construction
 
669

 
—

 
106

 
2,934

 
3,709

 
—

 
3,709

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
404

 
—

 
1

 
6,648

 
7,053

 
—

 
7,053

Owner occupied
 
1,192

 
—

 
—

 
3,221

 
4,413

 
—

 
4,413

Consumer
 
3,534

 
(1,474
)
 
1,187

 
1,916

 
5,163

 
199

 
4,964

PCI
 
10,515

 
(6,812
)
 
6,187

 
(2,983
)
 
6,907

 
—

 
6,907

Unallocated
 
226

 
—

 
—

 
(226
)
 
—

 
—

 
—

Total
 
$
70,043

 
$
(16,660
)
 
$
13,632

 
$
8,631

 
$
75,646

 
$
2,360

 
$
73,286
Changes in the Allowance for Unfunded Commitments and Letters of Credit
Changes in the allowance for unfunded commitments and letters of credit, a component of “Other liabilities” in the Consolidated Balance Sheets, are summarized as follows:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Beginning balance
 
$
4,330

 
$
3,130

 
$
2,705

Net changes in the allowance for unfunded commitments and letters of credit
 
(900
)
 
1,200

 
425

Ending balance
 
$
3,430

 
$
4,330

 
$
3,130
Financing Receivable Credit Quality Indicators [Table Text Block]
The following is an analysis of the credit quality of our loan portfolio, excluding PCI loans as of December 31, 2019 and 2018:
 
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Loss
 
Total
December 31, 2019
 
(in thousands)
Loans, excluding PCI loans
 
 
 
 
 
 
 
 
 
 
 
 
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,296,776

 
$
37,394

 
$
127,477

 
$
—

 
$
—

 
$
3,461,647

Unsecured
 
129,518

 
—

 
165

 
—

 
—

 
129,683

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
264,051

 
—

 
844

 
—

 
—

 
264,895

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
283,254

 
1,344

 
18,592

 
—

 
—

 
303,190

Income property
 
2,014,233

 
5,658

 
39,470

 
—

 
—

 
2,059,361

Owner occupied
 
1,757,757

 
6,158

 
37,430

 
—

 
—

 
1,801,345

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
1,364

 
—

 
—

 
—

 
—

 
1,364

Residential construction
 
190,301

 
—

 
—

 
—

 
—

 
190,301

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
88,389

 
—

 
—

 
—

 
—

 
88,389

Owner occupied
 
73,203

 
—

 
—

 
—

 
—

 
73,203

Consumer
 
289,588

 
—

 
2,983

 
—

 
—

 
292,571

Total
 
$
8,388,434

 
$
50,554

 
$
226,961

 
$
—

 
$
—

 
8,665,949

Less:
 
 
 
 
 
 
 
 
 
 
 
 
ALLL
 
81,124

Loans, excluding PCI loans, net
 
$
8,584,825

 
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Loss
 
Total
December 31, 2018
 
(in thousands)
Loans, excluding PCI loans
 
 
 
 
 
 
 
 
 
 
 
 
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
3,160,910

 
$
48,779

 
$
103,007

 
$
5

 
$
—

 
$
3,312,701

Unsecured
 
112,091

 
21

 
—

 
5

 
—

 
112,117

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
234,416

 
—

 
1,610

 
—

 
—

 
236,026

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
276,348

 
5,082

 
4,247

 
—

 
—

 
285,677

Income property
 
1,876,925

 
36,998

 
6,553

 
—

 
—

 
1,920,476

Owner occupied
 
1,556,852

 
14,964

 
45,935

 
—

 
—

 
1,617,751

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
4,099

 
—

 
318

 
—

 
—

 
4,417

Residential construction
 
212,225

 
—

 
171

 
—

 
—

 
212,396

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
194,912

 
—

 
—

 
—

 
—

 
194,912

Owner occupied
 
87,063

 
—

 
—

 
—

 
—

 
87,063

Consumer
 
313,817

 
—

 
4,398

 
—

 
—

 
318,215

Total
 
$
8,029,658

 
$
105,844

 
$
166,239

 
$
10

 
$
—

 
8,301,751

Less:
 
 
 
 
 
 
 
 
 
 
 
 
ALLL
 
79,758

Loans, excluding PCI loans, net
 
$
8,221,993


The following is an analysis of the credit quality of our PCI loan portfolio as of December 31, 2019 and 2018:
 
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Loss
 
Total
December 31, 2019
 
(in thousands)
PCI loans:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
6,109

 
$
962

 
$
606

 
$
—

 
$
—

 
$
7,677

Unsecured
 
406

 
—

 
—

 
—

 
—

 
406

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
8,351

 
—

 
102

 
—

 
—

 
8,453

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
8,720

 
497

 
212

 
—

 
—

 
9,429

Income property
 
18,386

 
—

 
297

 
—

 
—

 
18,683

Owner occupied
 
21,077

 
—

 
7,563

 
—

 
—

 
28,640

Consumer
 
8,758

 
—

 
226

 
—

 
—

 
8,984

Total
 
$
71,807

 
$
1,459

 
$
9,006

 
$
—

 
$
—

 
82,272

Less:
 
 
 
 
 
 
 
 
 
 
 
 
Valuation discount resulting from acquisition accounting
 
4,756

ALLL
 
2,844

PCI loans, net
 
$
74,672

 
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Loss
 
Total
December 31, 2018
 
(in thousands)
PCI loans:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial business:
 
 
 
 
 
 
 
 
 
 
 
 
Secured
 
$
8,041

 
$
—

 
$
840

 
$
—

 
$
—

 
$
8,881

Unsecured
 
692

 
—

 
99

 
—

 
—

 
791

Real estate:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential
 
9,633

 
—

 
215

 
—

 
—

 
9,848

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial land
 
10,363

 
—

 
—

 
—

 
—

 
10,363

Income property
 
19,680

 
—

 
—

 
—

 
—

 
19,680

Owner occupied
 
35,944

 
—

 
353

 
—

 
—

 
36,297

Real estate construction:
 
 
 
 
 
 
 
 
 
 
 
 
One-to-four family residential:
 
 
 
 
 
 
 
 
 
 
 
 
Land and acquisition
 
151

 
—

 
2

 
—

 
—

 
153

Commercial and multifamily residential:
 
 
 
 
 
 
 
 
 
 
 
 
Income property
 
507

 
—

 
—

 
—

 
—

 
507

Consumer
 
9,326

 
—

 
439

 
—

 
—

 
9,765

Total
 
$
94,337

 
$
—

 
$
1,948

 
$
—

 
$
—

 
96,285

Less:
 
 
 
 
 
 
 
 
 
 
 
 
Valuation discount resulting from acquisition accounting
 
6,525

ALLL
 
3,611

PCI loans, net
 
$
86,149
v3.19.3.a.u2
Other Real Estate Owned (Tables)
 12 Months Ended
Dec. 31, 2019
Other Real Estate, Foreclosed Assets, and Repossessed Assets [Abstract]  
Summary of Other Real Estate Owned
The following table sets forth activity in OREO for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
 
(in thousands)
Balance, beginning of period
 
$
6,019

 
$
13,298

Transfers in
 
386

 
1,200

Valuation adjustments
 
(195
)
 
(698
)
Proceeds from sale of OREO property
 
(6,455
)
 
(7,261
)
Gain (loss) on sale of OREO, net
 
797

 
(520
)
Balance, end of period
 
$
552

 
$
6,019
v3.19.3.a.u2
Premises and Equipment (Tables)
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Real and personal property and software, less accumulated depreciation and amortization, were as follows:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
Land
 
$
53,124

 
$
54,185

Buildings
 
107,371

 
108,890

Leasehold improvements
 
28,459

 
27,859

Furniture and equipment
 
37,929

 
32,292

Vehicles
 
510

 
511

Computer software
 
15,936

 
19,358

Total cost
 
243,329

 
243,095

Less accumulated depreciation and amortization
 
(77,921
)
 
(74,307
)
Total
 
$
165,408

 
$
168,788
v3.19.3.a.u2
Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill and Intangible Assets
The following table sets forth activity for goodwill and other intangible assets for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Goodwill, beginning of period
 
$
765,842

 
$
765,842

 
$
382,762

Established through acquisitions (1)
 
—

 
—

 
383,080

Total goodwill, end of period
 
765,842

 
765,842

 
765,842

Other intangible assets, net
 
 
 
 
 
 
CDI:
 
 
 
 
 
 
Gross CDI balance, beginning of period
 
105,473

 
105,473

 
58,598

Accumulated amortization, beginning of period
 
(60,455
)
 
(48,219
)
 
(41,886
)
CDI, net, beginning of period
 
45,018

 
57,254

 
16,712

Established through acquisitions (1)
 
—

 
—

 
46,875

CDI current period amortization
 
(10,479
)
 
(12,236
)
 
(6,333
)
Total CDI, end of period
 
34,539

 
45,018

 
57,254

Intangible assets not subject to amortization
 
919

 
919

 
919

Other intangible assets, net at end of period
 
35,458

 
45,937

 
58,173

Total goodwill and intangible assets, end of period
 
$
801,300

 
$
811,779

 
$
824,015


__________
(1) See Note 2, “Business Combinations,” for additional information regarding the goodwill and CDI related to the acquisition of Pacific Continental on November 1, 2017.
Estimated Future Amortization Expense of Core Deposit Intangibles
The following table provides the estimated future amortization expense of CDI for the succeeding five years:
 
 
Years Ending December 31,
 
 
(in thousands)
2020
 
$
8,724

2021
 
7,264

2022
 
5,880

2023
 
4,552

2024
 
3,432
v3.19.3.a.u2
Leases (Tables)
 12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Operating Leases by balance sheet location [Table Text Block]
The following table shows the details of the Company’s operating lease right-of-use asset and the associated lease liability for the period indicated:
Item
 
Balance Sheet Location
 
December 31, 2019
 
 
 
 
(in thousands)
Operating lease asset
 
Other assets
 
$
57,226

Operating lease liability
 
Other liabilities
 
$
63,030
Lease, Cost [Table Text Block]
The following table shows the components of net lease costs:
Item
 
Statement of Income Location
 
Year Ended December 31, 2019
 
 
 
 
(in thousands)
Operating lease cost (1)
 
Occupancy
 
$
10,851

Variable lease cost
 
Occupancy
 
1,805

Sublease income
 
Occupancy
 
(1,182
)
Net lease cost
 
 
 
$
11,474

__________
(1) Includes short-term lease costs, which are immaterial.
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
The following table shows the maturity analysis for operating leases as of December 31, 2019:
 
 
Year ending December 31,
 
 
(in thousands)
2020
 
$
11,105

2021
 
11,126

2022
 
10,689

2023
 
9,476

2024
 
6,980

Thereafter
 
21,866

Total future minimum lease payments
 
71,242

Amounts representing interest
 
(8,212
)
Present value of minimum lease payments
 
$
63,030
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Future minimum lease payments for the Company’s operating leases as of December 31, 2018, prior to the adoption of the new lease guidance were as follows:
 
 
Year Ending December 31,
 
 
(in thousands)
2019
 
$
10,947

2020
 
9,766

2021
 
8,729

2022
 
8,102

2023
 
6,796

Thereafter
 
18,703

Total minimum payments
 
$
63,043
v3.19.3.a.u2
Deposits (Tables)
 12 Months Ended
Dec. 31, 2019
Deposits [Abstract]  
Schedule Of Deposits
Year end deposits are summarized in the following table:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
Demand and other noninterest-bearing
 
$
5,328,146

 
$
5,227,216

Money market (1)
 
2,322,644

 
2,294,125

Interest-bearing demand (1)
 
1,150,437

 
1,084,863

Savings (1)
 
882,050

 
889,849

Interest-bearing public funds, other than certificates of deposit (1)
 
301,203

 
233,938

Certificates of deposit, less than $250,000
 
218,764

 
243,849

Certificates of deposit, $250,000 or more
 
151,995

 
89,473

Certificates of deposit insured by CDARS®
 
17,065

 
23,580

Brokered certificates of deposit
 
12,259

 
57,930

Reciprocal money market accounts
 
300,158

 
313,692

Subtotal
 
10,684,721

 
10,458,515

Valuation adjustment resulting from acquisition accounting
 
(13
)
 
(389
)
Total deposits
 
$
10,684,708

 
$
10,458,126
Schedule Of Time Deposits Maturity
The following table shows the amount and maturity of time deposits:
 
 
Years Ending December 31,
 
 
(in thousands)
2020
 
$
313,241

2021
 
53,679

2022
 
19,346

2023
 
8,060

2024
 
5,593

Thereafter
 
151

Total
 
$
400,070
v3.19.3.a.u2
Federal Home Loan Bank and Federal Reserve Bank Borrowings (Tables) - Federal Home Loan Bank Advances [Member]
 12 Months Ended
Dec. 31, 2019
Debt Instrument [Line Items]  
Schedule of Maturities of Long-term Debt
At December 31, 2019, FHLB advances were scheduled to mature as follows:
 
 
Federal Home Loan Bank Advances
Fixed rate advances
 
 
Weighted Average Rate
 
Amount
 
 
(dollars in thousands)
Within 1 year
 
1.82
%
 
$
946,000

Over 1 through 5 years
 
3.85
%
 
2,000

Due after 10 years
 
5.37
%
 
5,000

Total
 
953,000

Valuation adjustment from acquisition accounting
 
469

Total
 
$
953,469
Debt Instrument Activity For Year
The maximum, average outstanding and year end balances and average interest rates on advances from the FHLB were as follows for the years ended December 31, 2019, 2018 and 2017:
 
 
Years ended December 31,
 
 
2019
 
2018
 
2017
 
 
(dollars in thousands)
Balance at end of period
 
$
953,469

 
$
399,523

 
$
11,579

Average balance during period
 
$
469,983

 
$
166,563

 
$
79,788

Maximum month end balance during period
 
$
953,469

 
$
399,523

 
$
317,480

Weighted average rate during period
 
2.42
%
 
2.29
%
 
1.33
%
Weighted average rate at December 31
 
1.84
%
 
2.68
%
 
4.08
%
v3.19.3.a.u2
Derivatives and Balance Sheet Offsetting (Tables)
 12 Months Ended
Dec. 31, 2019
Derivative [Line Items]  
Balance Sheet Offsetting [Table Text Block]
The following tables show the gross interest rate swap contracts, collar agreements and repurchase agreements in the Consolidated Balance Sheets and the respective collateral received or pledged in the form of cash or other financial instruments. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability. Therefore, instances of overcollateralization are not shown.
 
Gross Amounts of Recognized Assets/Liabilities
 
Gross Amounts Offset in the Consolidated Balance Sheets
 
Net Amounts of Assets/Liabilities Presented in the Consolidated Balance Sheets
 
Gross Amounts Not Offset in the Consolidated Balance Sheets
 
 
 
 
Collateral Pledged/Received
 
Net Amount
December 31, 2019
(in thousands)
Assets
 
 
 
 
 
 
 
 
 
Interest rate swap contracts
$
19,144

 
$
—

 
$
19,144

 
$
—

 
$
19,144

Interest rate collar
$
14,727

 
$
—

 
$
14,727

 
$
(14,727
)
 
$
—

Liabilities
 
 
 
 
 
 
 
 
 
Interest rate swap contracts
$
19,145

 
$
—

 
$
19,145

 
$
(19,145
)
 
$
—

Repurchase agreements
$
64,437

 
$
—

 
$
64,437

 
$
(64,437
)
 
$
—

 
 
 
 
 
 
 
 
 
 
December 31, 2018
 
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
 
Interest rate swap contracts
$
7,033

 
$
—

 
$
7,033

 
$
—

 
$
7,033

Liabilities
 
 
 
 
 
 
 
 
 
Interest rate swap contracts
$
7,033

 
$
—

 
$
7,033

 
$
(3,235
)
 
$
3,798

Repurchase agreements
$
61,094

 
$
—

 
$
61,094

 
$
(61,094
)
 
$
—
Not Designated as Hedging Instrument [Member]  
Derivative [Line Items]  
Schedule of Fair Value Derivative Instruments
The following table presents the fair value of derivatives, as well as their classification on the Balance Sheet at December 31, 2019 and 2018:
 
Asset Derivatives
 
Liability Derivatives
 
2019
 
2018
 
2019
 
2018
 
Balance Sheet
Location
 
Fair Value
 
Balance Sheet
Location
 
Fair Value
 
Balance Sheet
Location
 
Fair Value
 
Balance Sheet
Location
 
Fair Value
 
 
 
(in thousands)
 
 
Derivatives designated as hedging instruments:
Interest rate collar
Other assets
 
$
14,727

 
Other assets
 
$
—

 
Other liabilities
 
$
—

 
Other liabilities
 
$
—

Derivatives not designated as hedging instruments:
Interest rate swap contracts
Other assets
 
$
19,144

 
Other assets
 
$
7,033

 
Other liabilities
 
$
19,145

 
Other liabilities
 
$
7,033
Available-for-sale Securities [Member]  
Derivative [Line Items]  
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]
The following table presents the class of collateral pledged for repurchase agreements as well as the remaining contractual maturity of the repurchase agreements:
 
 
Remaining contractual maturity of the agreements
 
 
Overnight and continuous
 
Up to 30 days
 
30 - 90 days
 
Greater than 90 days
 
Total
December 31, 2019
 
(in thousands)
Class of collateral pledged for repurchase agreements
 
 
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations
 
$
64,437

 
$
—

 
$
—

 
$
—

 
$
64,437

Gross amount of recognized liabilities for repurchase agreements
 
64,437

Amounts related to agreements not included in offsetting disclosure
 
$
—
v3.19.3.a.u2
Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2019
Employee Benefit [Line Items]  
Schedule of Accumulated and Projected Benefit Obligations
The following table reconciles the accumulated liability for the projected benefit obligation:
 
 
December 31,
2019
 
2018
 
 
(in thousands)
Balance, beginning of year
 
$
21,287

 
$
20,553

Actuarial (gain) loss
 
2,663

 
(31
)
Benefit expense
 
1,930

 
1,701

Benefit payments
 
(966
)
 
(936
)
Balance, end of year
 
$
24,914

 
$
21,287
SERP [Member]  
Employee Benefit [Line Items]  
Schedule of Expected Benefit Payments
The benefits expected to be paid in conjunction with the SERP are presented in the following table:
 
 
Years Ending December 31,
 
 
(in thousands)
2020
 
$
1,971

2021
 
1,116

2022
 
1,135

2023
 
1,239

2024
 
1,438

2025 through 2029
 
8,574

Total
 
$
15,473
v3.19.3.a.u2
Shareholders' Equity Dividends declared (Tables)
 12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Dividends, Common Stock, Cash
The following summarizes the dividend activity for the year ended December 31, 2019:
Declared
 
Regular Cash Dividends Per Common Share
 
Special Cash Dividends Per Common Share
 
Record Date
 
Paid Date
January 24, 2019
 
$
0.28

 
$
0.14

 
February 6, 2019
 
February 20, 2019
April 25, 2019
 
$
0.28

 
$
0.14

 
May 8, 2019
 
May 22, 2019
July 25, 2019
 
$
0.28

 
$
—

 
August 7, 2019
 
August 21, 2019
October 24, 2019
 
$
0.28

 
$
—

 
November 6, 2019
 
November 20, 2019
v3.19.3.a.u2
Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2019
Accumulated Other Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The following table shows changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2019, 2018 and 2017:
 
 
Unrealized Gains and Losses on Available for Sale Securities (1)
 
Unrealized Gains and Losses on Pension Plan Liability (1)
 
Unrealized Gains and Losses on Hedging Instruments (1)
 
Total (1)
Year Ended December 31, 2019
 
(in thousands)
Beginning balance
 
$
(33,128
)
 
$
(2,177
)
 
$
—

 
$
(35,305
)
Other comprehensive income (loss) before reclassifications
 
67,802

 
(2,042
)
 
11,760

 
77,520

Amounts reclassified from accumulated other comprehensive loss (2)
 
(1,636
)
 
245

 
(457
)
 
(1,848
)
Net current-period other comprehensive income (loss)
 
66,166

 
(1,797
)
 
11,303

 
75,672

Ending balance
 
$
33,038

 
$
(3,974
)
 
$
11,303

 
$
40,367

Year Ended December 31, 2018
 
 
 
 
 
 
 
 
Beginning balance
 
$
(19,779
)
 
$
(2,446
)
 
$
—

 
$
(22,225
)
Adjustment pursuant to adoption of ASU 2016-01
 
157

 
—

 
—

 
157

Other comprehensive income (loss) before reclassifications
 
(13,425
)
 
24

 
—

 
(13,401
)
Amounts reclassified from accumulated other comprehensive loss (2)
 
(81
)
 
245

 
—

 
164

Net current-period other comprehensive income (loss)
 
(13,506
)
 
269

 
—

 
(13,237
)
Ending balance
 
$
(33,128
)
 
$
(2,177
)
 
$
—

 
$
(35,305
)
Year Ended December 31, 2017
 
 
 
 
 
 
 
 
Beginning balance
 
$
(12,704
)
 
$
(6,295
)
 
$
—

 
$
(18,999
)
Other comprehensive income (loss) before reclassifications
 
(3,391
)
 
4,017

 
—

 
626

Amounts reclassified from accumulated other comprehensive loss (2)
 
7

 
223

 
—

 
230

Net current-period other comprehensive income (loss)
 
(3,384
)
 
4,240

 
—

 
856

Adjustment pursuant to adoption of ASU 2018-02
 
$
(3,691
)
 
$
(391
)
 
$
—

 
$
(4,082
)
Ending balance
 
$
(19,779
)
 
$
(2,446
)
 
$
—

 
$
(22,225
)
__________
(1) All amounts are net of tax. Amounts in parenthesis indicate debits.
(2) See following table for details about these reclassifications.
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] ed in OCI.
The following table shows details regarding the reclassifications from accumulated other comprehensive income for the years ended December 31, 2019, 2018 and 2017:
 
 
Amount Reclassified from Accumulated Other Comprehensive Income
 
Affected line Item in the Consolidated Statement of Income
 
 
Years Ended December 31,
 
 
 
 
2019
 
2018
 
2017
 
 
 
 
(in thousands)
 
 
Unrealized gains and losses on available for sale debt securities
 
$
2,132

 
$
106

 
$
(11
)
 
Investment securities gains (losses), net
 
 
2,132

 
106

 
(11
)
 
Total before tax
 
 
(496
)
 
(25
)
 
4

 
Income tax provision
 
 
$
1,636

 
$
81

 
$
(7
)
 
Net of tax
 
 
 
 
 
 
 
 
 
Amortization of pension plan liability actuarial losses
 
$
(319
)
 
$
(319
)
 
$
(350
)
 
Compensation and employee benefits
 
 
(319
)
 
(319
)
 
(350
)
 
Total before tax
 
 
74

 
74

 
127

 
Income tax provision
 
 
$
(245
)
 
$
(245
)
 
$
(223
)
 
Net of tax
 
 
 
 
 
 
 
 
 
Unrealized gains from hedging instruments
 
$
595

 
$
—

 
$
—

 
Loans
 
 
595

 
—

 
—

 
Total before tax
 
 
(138
)
 
—

 
—

 
Income tax provision
 
 
$
457

 
$
—

 
$
—

 
Net of tax
v3.19.3.a.u2
Fair Value Accounting and Measurement (Tables)
 12 Months Ended
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Fair Value Inputs, Assets, Quantitative Information
The range and weighted average of the significant unobservable inputs used to fair value our Level 3 nonrecurring assets during 2019 and 2018, along with the valuation techniques used, are shown in the following tables:
 
 
Fair Value  at
December 31, 2019
 
Valuation Technique
 
Unobservable Input
 
Range (Weighted Average) (1)
 
 
(dollars in thousands)
Impaired loans - collateral-dependent (2)
 
$
10,007

 
Fair Market Value of Collateral
 
Adjustment to Stated Value
 
0% - 100% (49.68%)

__________
(1) Adjustment applied to appraisal value and stated value (in the case of fixed assets and inventory).
(2) Collateral consists of accounts receivable, inventory, fixed assets, real estate and cash.

 
 
Fair Value  at
December 31, 2018
 
Valuation Technique
 
Unobservable Input
 
Range (Weighted Average) (1)
 
 
(dollars in thousands)
Impaired loans - collateral-dependent (2)
 
$
8,394

 
Fair Market Value of Collateral
 
Adjustment to Stated Value
 
0.00% - 70.04% (7.02%)

Impaired loans - other (3)
 
$
3,161

 
Discounted Cash Flow
 
Discount Rate
 
0.34
%

__________
(1) Discount rate applied to discounted cash flow valuation or appraisal value and stated value (in the case of fixed assets and inventory).
(2) Collateral consists of accounts receivable, inventory, fixed assets, real estate and cash.
(3) As there was only one impaired loan re-measured using discounted cash flows, a range of discounts could not be provided.
The following table sets forth the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis at December 31, 2019 and 2018 by level within the fair value hierarchy. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement:
 
 
Fair Value  at
December 31, 2019
 
Fair Value Measurements at Reporting Date Using
 
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
Debt securities available for sale
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
2,892,950

 
$
—

 
$
2,892,950

 
$
—

Other asset-backed securities (1)
 
196,050

 
—

 
196,050

 
—

State and municipal securities
 
488,802

 
—

 
488,802

 
—

U.S. government agency and government-sponsored enterprise securities
 
168,340

 
—

 
168,340

 
—

Total debt securities available for sale
 
$
3,746,142

 
$
—

 
$
3,746,142

 
$
—

Other assets:
 
 
 
 
 
 
 
 
Interest rate contracts
 
$
19,144

 
$
—

 
$
19,144

 
$
—

Interest rate collar
 
14,727

 
—

 
14,727

 
—

Liabilities
 
 
 
 
 
 
 
 
Other liabilities:
 
 
 
 
 
 
 
 
Interest rate contracts
 
$
19,145

 
$
—

 
$
19,145

 
$
—

 
 
Fair Value  at
December 31, 2018
 
Fair Value Measurements at Reporting Date Using
 
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
Debt securities available for sale
 
 
 
 
 
 
 
 
U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations (1)
 
$
2,013,355

 
$
—

 
$
2,013,355

 
$
—

Other asset-backed securities (1)
 
174,935

 
—

 
174,935

 
—

State and municipal securities
 
574,323

 
—

 
574,323

 
—

U.S. government agency and government-sponsored enterprise securities
 
404,587

 
—

 
404,587

 
—

U.S. government securities
 
248

 
248

 
—

 
—

Total debt securities available for sale
 
$
3,167,448

 
$
248

 
$
3,167,200

 
$
—

Other assets:
 
 
 
 
 
 
 
 
Interest rate contracts
 
$
7,033

 
$
—

 
$
7,033

 
$
—

Liabilities
 
 
 
 
 
 
 
 
Other liabilities:
 
 
 
 
 
 
 
 
Interest rate contracts
 
$
7,033

 
$
—

 
$
7,033

 
$
—


__________
(1) Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
Financial Assets Accounted For Fair Value On Nonrecurring Basis
The following table sets forth the Company’s assets that were measured using fair value estimates on a nonrecurring basis during the years ended December 31, 2019 and 2018:
 
 
Fair Value  at
December 31, 2019
 
Fair Value Measurements at Reporting Date Using
 
Losses During the Year Ended
December 31, 2019
 
 
Level 1
 
Level 2
 
Level 3
 
 
 
(in thousands)
Impaired loans
 
$
10,007

 
$
—

 
$
—

 
$
10,007

 
$
7,519

 
 
$
10,007

 
$
—

 
$
—

 
$
10,007

 
$
7,519

 
 
Fair Value  at
December 31, 2018
 
Fair Value Measurements at Reporting Date Using
 
Losses During the Year Ended
December 31, 2018
 
 
Level 1
 
Level 2
 
Level 3
 
 
 
(in thousands)
Impaired loans
 
$
11,555

 
$
—

 
$
—

 
$
11,555

 
$
1,821

 
 
$
11,555

 
$
—

 
$
—

 
$
11,555

 
$
1,821
Fair Value, by Balance Sheet Grouping
The following tables summarize carrying amounts and estimated fair values of selected financial instruments for the periods indicated:
 
 
December 31, 2019
 
 
Carrying
Amount
 
Fair
Value
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
 
 
Cash and due from banks
 
$
223,541

 
$
223,541

 
$
223,541

 
$
—

 
$
—

Interest-earning deposits with banks
 
24,132

 
24,132

 
24,132

 
—

 
—

Debt securities available for sale
 
3,746,142

 
3,746,172

 
—

 
3,746,172

 
—

FHLB stock
 
48,120

 
48,120

 
—

 
48,120

 
—

Loans held for sale
 
17,718

 
17,718

 
—

 
17,718

 
—

Loans
 
8,659,497

 
8,883,865

 
—

 
—

 
8,883,865

Interest rate contracts
 
19,144

 
19,144

 
—

 
19,144

 
—

Interest rate collar
 
14,727

 
14,727

 
—

 
14,727

 
—

Liabilities
 
 
 
 
 
 
 
 
 
 
Time deposits
 
$
400,070

 
$
397,736

 
$
—

 
$
397,736

 
$
—

FHLB advances
 
953,469

 
952,762

 
—

 
952,762

 
—

Repurchase agreements
 
64,437

 
64,437

 
—

 
64,437

 
—

Subordinated debentures
 
35,277

 
35,491

 
—

 
35,491

 
—

Interest rate contracts
 
19,145

 
19,145

 
—

 
19,145

 
—


 
 
December 31, 2018
 
 
Carrying
Amount
 
Fair
Value
 
Level 1
 
Level 2
 
Level 3
 
 
(in thousands)
Assets
 
 
 
 
 
 
 
 
 
 
Cash and due from banks
 
$
260,180

 
$
260,180

 
$
260,180

 
$
—

 
$
—

Interest-earning deposits with banks
 
17,407

 
17,407

 
17,407

 
—

 
—

Debt securities available for sale
 
3,167,448

 
3,167,448

 
248

 
3,167,200

 
—

FHLB stock
 
25,960

 
25,960

 
—

 
25,960

 
—

Loans held for sale
 
3,849

 
3,849

 
—

 
3,849

 
—

Loans
 
8,308,142

 
8,316,946

 
—

 
—

 
8,316,946

Interest rate contracts
 
7,033

 
7,033

 
—

 
7,033

 
—

Liabilities
 
 
 
 
 
 
 
 
 
 
Time deposits
 
$
414,443

 
$
407,659

 
$
—

 
$
407,659

 
$
—

FHLB advances
 
399,523

 
400,085

 
—

 
400,085

 
—

Repurchase agreements
 
61,094

 
61,094

 
—

 
61,094

 
—

Subordinated debentures
 
35,462

 
34,897

 
—

 
34,897

 
—

Interest rate contracts
 
7,033

 
7,033

 
—

 
7,033

 
—
v3.19.3.a.u2
Earnings Per Common Share (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted EPS for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands except per share amounts)
Basic EPS:
 
 
 
 
 
 
Net income
 
$
194,451

 
$
172,882

 
$
112,828

Less: Earnings allocated to participating securities
 
 
 
 
 
 
Preferred shares
 
—

 
—

 
3

Nonvested restricted shares
 
1,530

 
1,892

 
1,501

Earnings allocated to common shareholders
 
$
192,921

 
$
170,990

 
$
111,324

Weighted average common shares outstanding
 
71,999

 
72,385

 
59,882

Basic earnings per common share
 
$
2.68

 
$
2.36

 
$
1.86

Diluted EPS:
 
 
 
 
 
 
Earnings allocated to common shareholders
 
$
192,921

 
$
170,990

 
$
111,324

Weighted average common shares outstanding
 
71,999

 
72,385

 
59,882

Dilutive effect of equity awards and warrants
 
33

 
5

 
6

Weighted average diluted common shares outstanding
 
72,032

 
72,390

 
59,888

Diluted earnings per common share
 
$
2.68

 
$
2.36

 
$
1.86

Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive
 
8

 
4

 
13
v3.19.3.a.u2
Share-Based Payments (Tables)
 12 Months Ended
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]  
Schedule of Nonvested Share Activity
A summary of changes in the Company’s nonvested shares and related information for the years ended December 31, 2019, 2018 and 2017 is presented below:

 
Shares
 
Weighted
Average
Grant-Date
Fair Value
Nonvested at January 1, 2017
 
818,755

 
$
27.19

Granted
 
337,384

 
$
38.51

Vested
 
(253,509
)
 
$
25.67

Forfeited
 
(96,924
)
 
$
28.97

Nonvested at December 31, 2017
 
805,706

 
$
32.23

Granted
 
306,592

 
$
41.47

Vested
 
(237,146
)
 
$
28.78

Forfeited
 
(61,012
)
 
$
35.92

Nonvested at December 31, 2018
 
814,140

 
$
36.43

Granted
 
405,516

 
$
35.08

Vested
 
(268,253
)
 
$
32.50

Forfeited
 
(62,386
)
 
$
37.12

Nonvested at December 31, 2019
 
889,017

 
$
36.96
Schedule of Share-based Compensation, Stock Options, Activity
A summary of option activity under the Plan as of December 31, 2019, and changes during the year then ended is presented below:

 
Shares
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
 
Aggregate
Intrinsic
Value
($000)
Balance at December 31, 2018
 
5,514

 
$
9.91

 
 
 
 
Expired
 
(1,187
)
 
9.91

 
 
 
 
Exercised
 
(4,327
)
 
9.91

 
 
 
 
Balance at December 31, 2019
 
—

 
$
—

 
0
 
$
—
v3.19.3.a.u2
Income Tax (Tables)
 12 Months Ended
Dec. 31, 2019
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit)
The components of income tax expense are as follows:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
(in thousands)
Current expense
 
 
 
 
 
 
Federal
 
$
40,471

 
$
33,400

 
$
39,708

State
 
6,359

 
5,446

 
3,016

Total current tax expense
 
$
46,830

 
$
38,846

 
$
42,724

Deferred tax expense (benefit)
 
 
 
 
 
 
Federal
 
$
60

 
$
(291
)
 
$
21,524

State
 
270

 
399

 
907

Total deferred tax expense
 
330

 
108

 
22,431

Total
 
$
47,160

 
$
38,954

 
$
65,155
Schedule of Deferred Tax Assets and Liabilities
Significant components of the Company’s deferred tax assets and liabilities are as follows:
 
 
December 31,
 
 
2019
 
2018
 
 
(in thousands)
Deferred tax assets:
 
 
 
 
ALLL
 
$
20,489

 
$
20,578

Lease liability
 
14,776

 
—

Deferred compensation
 
11,079

 
9,501

Stock options and restricted stock
 
2,016

 
1,850

OREO
 
—

 
288

Nonaccrual interest
 
112

 
446

Unrealized loss on investment securities
 
—

 
10,129

Net operating losses and credit carryforwards
 
4,136

 
5,356

Other
 
245

 
733

Total deferred tax assets
 
52,853

 
48,881

Deferred tax liabilities:
 
 
 
 
Asset purchase tax basis difference
 
(7,888
)
 
(7,229
)
Right of use asset
 
(13,415
)
 
—

FHLB stock dividends
 
(789
)
 
(790
)
Deferred loan fees
 
(4,097
)
 
(4,399
)
Unrealized gain on investment securities
 
(10,091
)
 
—

Purchase accounting
 
(8,946
)
 
(9,245
)
Depreciation
 
(3,152
)
 
(2,609
)
Cash flow hedge
 
(3,452
)
 
—

Other
 
(100
)
 
(195
)
Total deferred tax liabilities
 
(51,930
)
 
(24,467
)
Net deferred tax asset
 
$
923

 
$
24,414
Schedule of Effective Income Tax Rate Reconciliation
A reconciliation of the Company’s effective income tax rate with the federal statutory tax rate is as follows:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
 
 
Amount
 
Percent
 
Amount
 
Percent
 
Amount
 
Percent
 
 
(dollars in thousands)
Income tax based on statutory rate
 
$
50,738

 
21
 %
 
$
44,485

 
21
 %
 
$
62,262

 
35
 %
Increase (decrease) resulting from:
 
 
 
 
 
 
 
 
 
 
 
 
Tax exempt instruments
 
(6,771
)
 
(3
)%
 
(6,423
)
 
(3
)%
 
(8,485
)
 
(5
)%
Bank owned life insurance
 
(1,963
)
 
(1
)%
 
(1,261
)
 
(1
)%
 
(3,351
)
 
(2
)%
Acquisition costs
 
—

 
—
 %
 
—

 
—
 %
 
825

 
1
 %
Deferred tax asset revaluation
 
—

 
—
 %
 
—

 
—
 %
 
12,210

 
7
 %
State income tax, net of federal benefit
 
5,134

 
2
 %
 
4,931

 
2
 %
 
2,550

 
1
 %
Other, net
 
22

 
1
 %
 
(2,778
)
 
(1
)%
 
(856
)
 
—
 %
Income tax provision
 
$
47,160

 
20
 %
 
$
38,954

 
18
 %
 
$
65,155

 
37
 %
v3.19.3.a.u2
Regulatory Capital Requirements (Tables)
 12 Months Ended
Dec. 31, 2019
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]  
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations
As of December 31, 2019, the most recent notification from the FDIC categorized Columbia Bank as well-capitalized under the regulatory framework for prompt corrective action. To be categorized as well- capitalized, an institution must maintain minimum CET1 risk-based, Tier 1 risk-based, total risk-based and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since the notification that management believes have changed Columbia Bank’s category.
The Company and its banking subsidiary’s actual capital amounts and ratios as of December 31, 2019 and 2018 are presented in the following table:
 
 
Actual
 
Minimum Required
For Capital
Adequacy
Purposes
 
Minimum Required
Plus Capital
Conservation Buffer
Phase-In
 
Minimum Required
Plus Capital
Conservation Buffer
Fully Phased-In
 
To Be Well
Capitalized Under
Prompt
Corrective Action
Provision
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
 
 
(dollars in thousands)
December 31, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CET1 Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,317,202

 
12.45
%
 
$
476,260

 
4.50
%
 
N/A

 
N/A

 
$
740,849

 
7.00
%
 
N/A

 
N/A

Columbia Bank
 
$
1,318,044

 
12.46
%
 
$
475,913

 
4.50
%
 
N/A

 
N/A

 
$
740,310

 
7.00
%
 
$
687,430

 
6.50
%
Tier 1 Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,317,202

 
12.45
%
 
$
635,014

 
6.00
%
 
N/A

 
N/A

 
$
899,603

 
8.50
%
 
N/A

 
N/A

Columbia Bank
 
$
1,318,044

 
12.46
%
 
$
634,551

 
6.00
%
 
N/A

 
N/A

 
$
898,947

 
8.50
%
 
$
846,068

 
8.00
%
Total Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,439,877

 
13.60
%
 
$
846,685

 
8.00
%
 
N/A

 
N/A

 
$
1,111,274

 
10.50
%
 
N/A

 
N/A

Columbia Bank
 
$
1,405,422

 
13.29
%
 
$
846,068

 
8.00
%
 
N/A

 
N/A

 
$
1,110,464

 
10.50
%
 
$
1,057,585

 
10.00
%
Tier 1 Capital Leverage (to average assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,317,202

 
10.17
%
 
$
517,938

 
4.00
%
 
N/A

 
N/A

 
$
517,938

 
4.00
%
 
N/A

 
N/A

Columbia Bank
 
$
1,318,044

 
10.22
%
 
$
515,797

 
4.00
%
 
N/A

 
N/A

 
$
515,797

 
4.00
%
 
$
644,746

 
5.00
%
December 31, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CET1 Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,253,394

 
12.74
%
 
$
442,717

 
4.50
%
 
$
627,182

 
6.38
%
 
$
688,670

 
7.00
%
 
N/A

 
N/A

Columbia Bank
 
$
1,274,317

 
12.96
%
 
$
442,552

 
4.50
%
 
$
626,948

 
6.38
%
 
$
688,414

 
7.00
%
 
$
639,241

 
6.50
%
Tier 1 Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,253,394

 
12.74
%
 
$
590,289

 
6.00
%
 
$
774,754

 
7.88
%
 
$
836,243

 
8.50
%
 
N/A

 
N/A

Columbia Bank
 
$
1,274,317

 
12.96
%
 
$
590,069

 
6.00
%
 
$
774,465

 
7.88
%
 
$
835,931

 
8.50
%
 
$
786,759

 
8.00
%
Total Capital (to risk-weighted assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,376,555

 
13.99
%
 
$
787,052

 
8.00
%
 
$
971,517

 
9.88
%
 
$
1,033,006

 
10.50
%
 
N/A

 
N/A

Columbia Bank
 
$
1,362,016

 
13.85
%
 
$
786,759

 
8.00
%
 
$
971,155

 
9.88
%
 
$
1,032,621

 
10.50
%
 
$
983,448

 
10.00
%
Tier 1 Capital Leverage (to average assets):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The Company
 
$
1,253,394

 
10.24
%
 
$
489,399

 
4.00
%
 
$
489,399

 
4.00
%
 
$
489,399

 
4.00
%
 
N/A

 
N/A

Columbia Bank
 
$
1,274,317

 
10.42
%
 
$
489,254

 
4.00
%
 
$
489,254

 
4.00
%
 
$
489,254

 
4.00
%
 
$
611,567

 
5.00
%
v3.19.3.a.u2
Parent Company Financial Information (Tables)
 12 Months Ended
Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]  
Condensed Balance Sheets - Parent Company Only
Condensed Balance Sheets—Parent Company Only
 
 
December 31,
2019
 
2018
 
 
(in thousands)
Assets
 
 
 
 
Cash
 
$
6,088

 
$
945

Interest-earning deposits
 
21,717

 
7,226

Total cash and cash equivalents
 
27,805

 
8,171

Investment in banking subsidiary
 
2,156,039

 
2,049,855

Investment in other subsidiaries
 
5,671

 
5,312

Goodwill
 
4,729

 
4,729

Other assets
 
1,675

 
1,595

Total assets
 
$
2,195,919

 
$
2,069,662

Liabilities and Shareholders’ Equity
 
 
 
 
Subordinated debentures
 
$
35,277

 
$
35,462

Other liabilities
 
680

 
551

Total liabilities
 
35,957

 
36,013

Shareholders’ equity
 
2,159,962

 
2,033,649

Total liabilities and shareholders’ equity
 
$
2,195,919

 
$
2,069,662
Condensed Statements of Income - Parent Company Only
Condensed Statements of Income—Parent Company Only
 
 
Years Ended December 31,
2019
 
2018
 
2017
(in thousands)
Income
 
 
 
 
 
 
Dividend from banking subsidiary
 
$
168,000

 
$
85,250

 
$
66,800

Interest-earning deposits
 
100

 
12

 
2

Other income
 
68

 
56

 
8

Total income
 
168,168

 
85,318

 
66,810

Expense
 
 
 
 
 
 
Compensation and employee benefits
 
791

 
978

 
732

Subordinated debentures interest expense
 
1,871

 
1,871

 
304

Other borrowings interest expense
 
—

 
4

 
60

Other expense
 
2,111

 
2,058

 
3,090

Total expenses
 
4,773

 
4,911

 
4,186

Income before income tax benefit and equity in undistributed earnings of subsidiaries
 
163,395

 
80,407

 
62,624

Income tax benefit
 
(967
)
 
(1,017
)
 
(548
)
Income before equity in undistributed earnings of subsidiaries
 
164,362

 
81,424

 
63,172

Equity in undistributed earnings of subsidiaries
 
30,089

 
91,458

 
49,656

Net income
 
$
194,451

 
$
172,882

 
$
112,828
Condensed Statements of Cash Flows - Parent Company Only
Condensed Statements of Cash Flows—Parent Company Only
 
 
Years Ended December 31,
2019
 
2018
 
2017
(in thousands)
Operating Activities
 
 
 
 
 
 
Net income
 
$
194,451

 
$
172,882

 
$
112,828

Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
 
 
 
Equity in undistributed earnings of subsidiaries
 
(30,089
)
 
(91,458
)
 
(49,656
)
Stock-based compensation expense
 
9,271

 
8,354

 
7,745

Net changes in other assets and liabilities
 
(133
)
 
1,622

 
1,672

Net cash provided by operating activities
 
173,500

 
91,400

 
72,589

Investing Activities
 
 
 
 
 
 
Net cash paid in business combinations
 
—

 
—

 
(580
)
Net cash used in investing activities
 
—

 
—

 
(580
)
Financing Activities
 
 
 
 
 
 
Common stock dividends
 
(102,265
)
 
(83,459
)
 
(51,308
)
Repayment of junior subordinated debentures
 
—

 
(8,248
)
 
(6,186
)
Cash settlement of acquired equity awards
 
—

 
—

 
(7,345
)
Purchase and retirement of common stock
 
(2,792
)
 
(2,677
)
 
(2,299
)
Purchase of treasury shares
 
(50,834
)
 
—

 
—

Proceeds from exercise of stock options
 
2,025

 
1,857

 
1,980

Net cash used in financing activities
 
(153,866
)
 
(92,527
)
 
(65,158
)
Increase (decrease) in cash and cash equivalents
 
19,634

 
(1,127
)
 
6,851

Cash and cash equivalents at beginning of year
 
8,171

 
9,298

 
2,447

Cash and cash equivalents at end of year
 
$
27,805

 
$
8,171

 
$
9,298

 
 
 
 
 
 
 
Supplemental disclosure of noncash investing and financing activities
 
 
 
 
 
 
Share-based consideration issued in business combinations
 
$
—

 
$
—

 
$
636,385
v3.19.3.a.u2
Summary Of Quarterly Financial Information (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Financial Information
Quarterly financial information for the years ended December 31, 2019 and 2018 is summarized as follows:
 
 
Fourth
Quarter
 
Third
Quarter
 
Second
Quarter
 
First
Quarter
 
Year Ended
December 31,
 
 
(in thousands, except per share amounts)
 
 
2019
 
 
 
 
 
 
 
 
 
 
Total interest income
 
$
133,109

 
$
132,533

 
$
135,422

 
$
128,888

 
$
529,952

Total interest expense
 
8,292

 
10,083

 
10,306

 
7,866

 
36,547

Net interest income
 
124,817

 
122,450

 
125,116

 
121,022

 
493,405

Provision for loan and lease losses
 
1,614

 
299

 
218

 
1,362

 
3,493

Noninterest income
 
21,807

 
28,030

 
25,648

 
21,696

 
97,181

Noninterest expense
 
86,978

 
87,076

 
86,728

 
84,700

 
345,482

Income before income taxes
 
58,032

 
63,105

 
63,818

 
56,656

 
241,611

Provision for income taxes
 
11,903

 
12,378

 
12,094

 
10,785

 
47,160

Net income
 
$
46,129

 
$
50,727

 
$
51,724

 
$
45,871

 
$
194,451

Per common share (1)
 
 
 
 
 
 
 
 
 
 
Earnings (basic)
 
$
0.64

 
$
0.70

 
$
0.71

 
$
0.63

 
$
2.68

Earnings (diluted)
 
$
0.64

 
$
0.70

 
$
0.71

 
$
0.63

 
$
2.68

 
 
 
 
 
 
 
 
 
 
 
2018
 
 
 
 
 
 
 
 
 
 
Total interest income
 
$
129,801

 
$
127,575

 
$
120,549

 
$
119,144

 
$
497,069

Total interest expense
 
5,913

 
4,779

 
3,875

 
3,663

 
18,230

Net interest income
 
123,888

 
122,796

 
116,674

 
115,481

 
478,839

Provision for loan and lease losses
 
1,789

 
3,153

 
3,975

 
5,852

 
14,769

Noninterest income
 
20,402

 
21,019

 
23,692

 
23,143

 
88,256

Noninterest expense
 
87,019

 
82,841

 
84,643

 
85,987

 
340,490

Income before income taxes
 
55,482

 
57,821

 
51,748

 
46,785

 
211,836

Provision for income taxes
 
10,734

 
11,406

 
9,999

 
6,815

 
38,954

Net income
 
$
44,748

 
$
46,415

 
$
41,749

 
$
39,970

 
$
172,882

Per common share (1)
 
 
 
 
 
 
 
 
 
 
Earnings (basic)
 
$
0.61

 
$
0.63

 
$
0.57

 
$
0.55

 
$
2.36

Earnings (diluted)
 
$
0.61

 
$
0.63

 
$
0.57

 
$
0.55

 
$
2.36

 __________
(1) Due to averaging of shares, quarterly EPS may not add up to the totals reported for the full year.
v3.19.3.a.u2
Revenue from Contracts with Customers (Tables)
 12 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue [Table Text Block]
The following table shows the disaggregation of revenue from contracts with customers for the period indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
 
(in thousands)
Noninterest income:
 
 
 
 
Revenue from contracts with customers:
 
 
 
 
Deposit account and treasury management fees
 
$
35,695

 
$
36,072

Card revenue
 
15,198

 
19,719

Financial services and trust revenue
 
12,799

 
12,135

Total revenue from contracts with customers
 
63,692

 
67,926

Other sources of noninterest income
 
33,489

 
20,330

Total noninterest income
 
$
97,181

 
$
88,256
v3.19.3.a.u2
Summary of Significant Accounting Policies (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
location
Jan. 01, 2020
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Accounting Policies [Line Items]          
Number Of Branch Locations | location 146        
FHLB membership stock purchase requirement cap $ 10,000,000        
Federal Home Loan Bank stock, par value 100        
Loans and Leases Receivable, Nonaccrual Loans Considered Impaired 500,000        
Loans and Leases Receivable, Loans Evaluated For Impairment On Quarterly Basis, Outstanding $ 500,000        
Number Of Days Used To Determine Treatment As Cash Equivalent 90 days        
Number of Days of Delinquency at Which Loans Are Categorized As Non Accrual Status 90 days        
Core Deposits [Member]          
Accounting Policies [Line Items]          
Estimated life of CDI, in years 10 years        
WASHINGTON          
Accounting Policies [Line Items]          
Number Of Branch Locations | location 71        
OREGON          
Accounting Policies [Line Items]          
Number Of Branch Locations | location 61        
IDAHO          
Accounting Policies [Line Items]          
Number Of Branch Locations | location 14        
Vehicles [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Estimated Useful Lives P5Y        
Minimum [Member] | Building and Building Improvements [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Estimated Useful Lives P5Y        
Minimum [Member] | Furniture and Fixtures [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Estimated Useful Lives P3Y        
Minimum [Member] | Software [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Estimated Useful Lives P3Y        
Maximum [Member] | Building and Building Improvements [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Estimated Useful Lives P39Y        
Maximum [Member] | Furniture and Fixtures [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Estimated Useful Lives P7Y        
Maximum [Member] | Software [Member]          
Accounting Policies [Line Items]          
Property, Plant and Equipment, Estimated Useful Lives P5Y        
Accounting Standards Update 2016-02 [Member]          
Accounting Policies [Line Items]          
Change in other assets due to adoption of new ASU $ 49,200,000        
Change in other liabilities due to adoption of new ASU 48,200,000        
Cumulative Effect of New Accounting Principle in Period of Adoption     $ (782,000)    
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption     $ (782,000)    
Accounting Standards Update 2018-02 [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption         $ 0
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption         (4,082,000)
Accounting Standards Update 2016-09 [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption         (67,000)
Accounting Standards Update 2016-09 [Member] | Retained Earnings [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption         117,000
Accounting Standards Update 2016-09 [Member] | Common Stock [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption         $ (184,000)
Accounting Standards Update 2016-01 [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption       $ 0  
Accounting Standards Update 2016-01 [Member] | Retained Earnings [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption       $ 157,000  
Accounting Standards Update 2018-15 [Member]          
Accounting Policies [Line Items]          
Change in other assets due to adoption of new ASU 1,500,000        
Accounting Standards Update 2016-13 [Member]          
Accounting Policies [Line Items]          
Change in allowance for credit loss due to adoption of new ASU   $ 1,600,000      
Change in allowance for unfunded commitments and letters of credit due to adoption of new ASU   $ 1,600,000      
Accounting Standards Update 2016-13 [Member] | Retained Earnings [Member]          
Accounting Policies [Line Items]          
Cumulative Effect of New Accounting Principle in Period of Adoption 2,500,000        
Designated as Hedging Instrument [Member] | Interest rate collar [Domain]          
Accounting Policies [Line Items]          
Derivative, Notional Amount $ 500,000,000.0        
v3.19.3.a.u2
Business Combinations (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Nov. 01, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Pacific Continental [Member]        
Business Acquisition [Line Items]        
Business Combination, Cost of Acquired Entity, Purchase Price, Total $ 637,103      
Business Combination, Acquisition Related Costs   $ 0 $ 8,661  
Business Acquisition, Effective Date of Acquisition Nov. 01, 2017      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents $ 81,190      
Business Acquisition, Purchase Price Allocation, Current Assets, Marketable Securities 449,291      
Business Acquisition, Purchase Price Allocation, FHLB Stock 7,084      
Business Combination, Acquired Receivable, Fair Value 1,873,987      
Business Acquisition, Purchase Price Allocation, Accrued Interest Receivable 7,827      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 27,343      
Business Acquisition, Purchase Price Allocation, Other Real Estate Owned 10,279      
Business Combination, Purchase Price Allocation, Amortizable Intangible Assets 46,875      
Business Combination, Purchase Price Allocation, Other Assets 50,638      
Business Acquisition, Purchase Price Allocation, Liabilities, Deposits (2,118,982)      
Business Combination, Purchase Price Allocation, Federal Home Loan bank advances 101,127      
Business Combination, Purchase Price Allocation, Subordinated Debt (35,678)      
Business combination, purchase price allocation, securities sold under agreements to repurchase (1,617)      
Business Acquisition, Purchase Price Allocation, Other Noncurrent Liabilities (28,653)      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 254,023      
Business Combination, Purchase Price Allocation, Goodwill Amount $ 383,080      
Business Acquisition, Pro Forma Revenue       $ 571,944
Business Acquisition, Pro Forma Net Income (Loss)       $ 149,859
Business Acquisition, Pro Forma Earnings Per Share, Basic       $ 2.23
Business Acquisition, Pro Forma Earnings Per Share, Diluted       $ 2.23
Intermountain Community Bancorp [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs       $ 17,196
Compensation and employee benefits [Member] | Pacific Continental [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs   0 3,620  
Compensation and employee benefits [Member] | Intermountain Community Bancorp [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs       8,014
Occupancy [Member] | Pacific Continental [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs   0 1,619  
Occupancy [Member] | Intermountain Community Bancorp [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs       1,912
Advertising and promotion [Member] | Pacific Continental [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs   0 537 467
Data processing [Member] | Pacific Continental [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs   0 963  
Data processing [Member] | Intermountain Community Bancorp [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs       1,555
Legal and professional fees [Member] | Pacific Continental [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs   0 1,028  
Legal and professional fees [Member] | Intermountain Community Bancorp [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs       4,618
Other noninterest expenses [Member] | Pacific Continental [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs   $ 0 $ 894  
Other noninterest expenses [Member] | Intermountain Community Bancorp [Member]        
Business Acquisition [Line Items]        
Business Combination, Acquisition Related Costs       $ 630
v3.19.3.a.u2
Business Combinations narrative (Details) - Pacific Continental [Member] - USD ($)
$ in Thousands
 12 Months Ended
Nov. 01, 2017
Dec. 31, 2019
Dec. 31, 2018
Business Acquisition [Line Items]      
Business Combination, Purchase Price Allocation, Junior Subordinated Debentures $ (14,434)    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities (2,300,491)    
Business Combination, Purchase Price Allocation, Goodwill Amount $ 383,080    
Business Acquisition, Effective Date of Acquisition Nov. 01, 2017    
Business Combination, Cost of Acquired Entity, Purchase Price, Total $ 637,103    
Business Combination, Acquired Receivable, Fair Value 1,873,987    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 254,023    
Business Combination, Purchase Price Allocation, Amortizable Intangible Assets 46,875    
Business Combination, Acquisition Related Costs   $ 0 $ 8,661
Business Combination, Purchase Price Allocation, Other Assets 50,638    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets 2,554,514    
Business Acquisition, Purchase Price Allocation, Liabilities, Deposits $ 2,118,982    
Business Acquisition, Percentage of Voting Interests Acquired 100.00%    
Business Combination, Purchase Price Allocation, Federal Home Loan bank advances $ (101,127)    
v3.19.3.a.u2
Cash and Cash Equivalents (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Federal Reserve Bank [Member]    
Restricted Cash and Cash Equivalents Items [Line Items]    
Restricted Cash and Cash Equivalents $ 84.9 $ 110.2
v3.19.3.a.u2
Securities (Securities Available for Sale) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 3,703,096 $ 3,210,615
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 63,486 12,799
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (20,440) (55,966)
Securities available for sale 3,746,142 3,167,448
Debt Securities, Available-for-sale, Amortized Cost 3,703,096  
Debt Securities, Available-for-sale 3,746,142 3,167,448
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost [1] 2,864,949 2,045,728
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax [1] 47,223 8,473
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax [1] (19,222) (40,846)
Securities available for sale [1] 2,892,950 2,013,355
Asset-backed Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost [1] 194,563 176,793
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 2,476 763
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] (989) (2,621)
Debt Securities, Available-for-sale [1] 196,050 174,935
State and Municipal Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 478,366 579,755
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 10,660 2,328
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (224) (7,760)
Securities available for sale 488,802 574,323
U.S. Government Agency and Government-Sponsored Enterprise Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 165,218 408,088
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax 3,127 1,235
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax (5) (4,736)
Securities available for sale $ 168,340 404,587
US Government Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost   251
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax   0
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax   (3)
Securities available for sale   $ 248
[1] Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
v3.19.3.a.u2
Securities (Schedule of Contractual Maturities of Investment Securities Available for Sale) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale [Abstract]    
Due within one year, Amortized Cost $ 77,363  
Due after one year through five years, Amortized Cost 416,556  
Due after five years through ten years, Amortized Cost 2,007,225  
Due after ten years, Amortized Cost 1,201,952  
Total investment securities available-for-sale, Amortized Cost 3,703,096  
Due within one year, Fair Value 77,538  
Due after one year through five years, Fair Value 421,363  
Due after five years through ten years, Fair Value 2,041,751  
Due after ten years, Fair Value 1,205,490  
Total investment securities available-for-sale, Fair Value $ 3,746,142 $ 3,167,448
v3.19.3.a.u2
Securities (Carrying Value of Securities Pledged as Collateral) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Restricted $ 588,573 $ 467,138
To secure public funds [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Restricted 323,055 276,343
To secure borrowings [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Restricted 111,488 52,303
Other Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Restricted $ 154,030 $ 138,492
v3.19.3.a.u2
Securities (Summary of Gross Unrealized Losses and Fair Value of the Investments with Unrealized Losses) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
security
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Debt Securities, Available-for-sale [Line Items]      
Equity Securities, FV-NI, Gain (Loss) [1] $ 0 $ (195) $ 0
Less than 12 Months Fair Value 1,157,774 276,306  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss, Instant (13,446) (1,598)  
12 Months or More Fair Value 521,420 1,873,565  
12 Months or More Unrealized Losses (6,994) (54,368)  
Total Fair Value 1,679,194 2,149,871  
Total Unrealized Losses $ (20,440) (55,966)  
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 243    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security 162    
Less than 12 Months Fair Value [2] $ 1,055,903 114,551  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss, Instant [2] (12,424) (750)  
12 Months or More Fair Value [2] 491,539 1,207,020  
12 Months or More Unrealized Losses [2] (6,798) (40,096)  
Total Fair Value [2] 1,547,442 1,321,571  
Total Unrealized Losses [2] $ (19,222) (40,846)  
Asset-backed Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 18    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security 6    
Less than 12 Months Fair Value [2] $ 89,508 40,071  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss, Instant [2] (880) (222)  
12 Months or More Fair Value [2] 6,799 94,367  
12 Months or More Unrealized Losses [2] (109) (2,399)  
Total Fair Value [2] 96,307 134,438  
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [2] $ (989) (2,621)  
State and Municipal Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 24    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security 14    
Less than 12 Months Fair Value $ 12,363 106,292  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss, Instant (142) (581) [2]  
12 Months or More Fair Value 12,587 280,496  
12 Months or More Unrealized Losses (82) (7,179)  
Total Fair Value 24,950 386,788  
Total Unrealized Losses $ (224) (7,760)  
U.S. Government Agency and Government-Sponsored Enterprise Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 3    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security 3    
Less than 12 Months Fair Value $ 0 15,392  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss, Instant 0 (45)  
12 Months or More Fair Value 10,495 291,435  
12 Months or More Unrealized Losses (5) (4,691)  
Total Fair Value 10,495 306,827  
Total Unrealized Losses $ (5) (4,736)  
US Government Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security 0    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year | security 0    
Less than 12 Months Fair Value   0  
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss, Instant   0  
12 Months or More Fair Value   247  
12 Months or More Unrealized Losses   (3)  
Total Fair Value   247  
Total Unrealized Losses   $ (3)  
[1] Other securities losses, net includes net unrealized loss activity associated with equity securities.
[2] Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
v3.19.3.a.u2
Securities (Narrative) (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
issuance
security
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Debt Securities, Available-for-sale [Line Items]      
Number Of Issuances Of Securities Exceeding Shareholders Equity Threshold | issuance 0    
Proceeds from Sale of Debt Securities, Available-for-sale | $ $ 259,554 $ 32,330 $ 30,403
US Government Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 0    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 0    
Other Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Issuances Of Securities Exceeding Shareholders Equity Threshold, Percent 10.00%    
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 243    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 162    
Municipal Bonds [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 24    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 14    
US Government Corporations and Agencies Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 3    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 3    
v3.19.3.a.u2
Securities Securities (Summary of Gross Realized Gains and Losses) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]      
Proceeds from Sale of Debt Securities, Available-for-sale $ 259,554 $ 32,330 $ 30,403
Available-for-sale Securities, Gross Realized Gains 3,357 235 111
Available-for-sale Securities, Gross Realized Losses (1,225) (129) (122)
Equity Securities, FV-NI, Gain (Loss) [1] 0 195 0
Debt and Equity Securities, Gain (Loss) $ 2,132 $ (89) $ (11)
[1] Other securities losses, net includes net unrealized loss activity associated with equity securities.
v3.19.3.a.u2
Loans (Narrative) (Details)
$ in Thousands, loan in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
contract
Dec. 31, 2018
USD ($)
loan
contract
Dec. 31, 2017
USD ($)
contract
Financing Receivable, Credit Quality Indicator [Line Items]      
Financing Receivable, Nonaccrual $ 33,060    
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans 2,000 $ 3,600 $ 2,400
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans 0    
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans | loan   0.0  
Loans and Leases Receivable, Nonaccrual of Interest, Commitments of Additional Funds 2,000 $ 2,100  
Financing Receivable Modifications Additional Commitment To Lend $ 1,100 $ 2,100  
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract 1 0 0
Loans Receivable [Member]      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans pledged to collateralize Federal Home Loan Bank Advances $ 3,240,000 $ 3,220,000  
Commercial Loan [Member]      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans pledged to collateralize Federal Reserve Bank Borrowings $ 151,300 $ 82,000  
v3.19.3.a.u2
Loans (Analysis of Loan Portfolio by Major Types of Loans) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Credit Quality Indicator [Line Items]        
Less: Net unearned income $ (34,315) $ (42,194)    
Total loans, net of unearned income 8,743,465 8,391,511    
Less: Allowance for loan and lease losses (83,968) (83,369) $ (75,646) $ (70,043)
Loans, net 8,659,497 8,308,142    
Loans held for sale 17,718 3,849    
Commercial Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 3,610,460 3,447,662    
Real estate: One-to-four family residential [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 272,347 246,384    
Less: Allowance for loan and lease losses (607) (593) (701) (599)
Commercial and Multifamily Residential [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 4,238,173 3,908,937    
Real Estate Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 4,510,520 4,155,321    
One-to-Four Family Residential Construction [Domain]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 192,762 217,943    
Commercial and Multifamily Residential Construction [Domain]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 163,103 284,928    
Real Estate Construction Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 355,865 502,871    
Consumer [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 300,935 327,851    
Less: Allowance for loan and lease losses (4,455) (5,301) $ (5,163) $ (3,534)
Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 8,665,949 8,301,751    
Less: Net unearned income (34,315) (42,194)    
Total loans, net of unearned income 8,665,949 8,301,751    
Less: Allowance for loan and lease losses (81,124) (79,758)    
Loans, net 8,584,825 8,221,993    
Loans held for sale 17,718 3,849    
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 3,602,597 3,438,422    
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 265,144 238,367    
Total loans, net of unearned income 264,895 236,026    
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial and Multifamily Residential [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 4,183,961 3,846,027    
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real Estate Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 4,449,105 4,084,394    
Loans, Excluding Purchased Credit Impaired Loans [Member] | One-to-Four Family Residential Construction [Domain]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 192,762 217,790    
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial and Multifamily Residential Construction [Domain]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 163,103 284,394    
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real Estate Construction Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 355,865 502,184    
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 292,697 318,945    
Total loans, net of unearned income 292,571 318,215    
Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 82,272 96,285    
Less: Net unearned income 0 0    
Total loans, net of unearned income 77,516 89,760    
Less: Allowance for loan and lease losses (2,844) (3,611)    
Loans, net 74,672 86,149    
Loans held for sale 0 0    
Purchased Credit Impaired Loans [Member] | Commercial Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 8,083 9,672    
Total loans, net of unearned income 7,863 9,240    
Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 8,453 9,848    
Total loans, net of unearned income 7,203 8,017    
Purchased Credit Impaired Loans [Member] | Commercial and Multifamily Residential [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 56,752 66,340    
Total loans, net of unearned income 54,212 62,910    
Purchased Credit Impaired Loans [Member] | Real Estate Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 65,205 76,188    
Total loans, net of unearned income 61,415 70,927    
Purchased Credit Impaired Loans [Member] | One-to-Four Family Residential Construction [Domain]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 0 153    
Total loans, net of unearned income 0 153    
Purchased Credit Impaired Loans [Member] | Commercial and Multifamily Residential Construction [Domain]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 0 507    
Total loans, net of unearned income 0 534    
Purchased Credit Impaired Loans [Member] | Real Estate Construction Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 0 660    
Total loans, net of unearned income 0 687    
Purchased Credit Impaired Loans [Member] | Consumer [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross 8,984 9,765    
Total loans, net of unearned income $ 8,238 $ 8,906    
v3.19.3.a.u2
Loans (Analysis of Nonaccrual Loans) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual $ 33,060  
Unpaid Principal Balance Nonaccrual Loans 45,209 $ 65,358
Recorded Investment Nonaccrual Loans   54,842
Consumer [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 2,018  
Unpaid Principal Balance Nonaccrual Loans 2,355 3,149
Recorded Investment Nonaccrual Loans   2,949
Commercial business: Secured loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 26,615  
Unpaid Principal Balance Nonaccrual Loans 38,278 45,072
Recorded Investment Nonaccrual Loans   35,504
Commercial business: Unsecured loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 359  
Unpaid Principal Balance Nonaccrual Loans 360 9
Recorded Investment Nonaccrual Loans   9
Real estate: One-to-four family residential [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 591  
Unpaid Principal Balance Nonaccrual Loans 632 1,178
Recorded Investment Nonaccrual Loans   1,158
Real estate: Commercial and multifamily residential: Commercial land [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 1,985  
Unpaid Principal Balance Nonaccrual Loans 1,994 2,270
Recorded Investment Nonaccrual Loans   2,261
Real estate: Commercial and multifamiIy residential: Income property [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 205  
Unpaid Principal Balance Nonaccrual Loans 206 3,062
Recorded Investment Nonaccrual Loans   2,721
Real estate: Commercial and multifamiIy residential: Owner occupied [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 1,287  
Unpaid Principal Balance Nonaccrual Loans 1,325 10,300
Recorded Investment Nonaccrual Loans   9,922
Real estate construction: One-to-four family residential: Land and acquisition [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 0  
Unpaid Principal Balance Nonaccrual Loans 0 318
Recorded Investment Nonaccrual Loans   318
Real estate construction: One-to-four family residential: Residential construction [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 0  
Unpaid Principal Balance Nonaccrual Loans 59 0
Recorded Investment Nonaccrual Loans   0
Loans, Excluding Purchased Credit Impaired Loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 33,060 54,842
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 2,018 2,949
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Secured loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 26,615 35,504
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Unsecured loans [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 359 9
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 591 1,158
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 1,985 2,261
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 205 2,721
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 1,287 9,922
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Land and acquisition [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 0 318
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Residential construction [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 0 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Income property [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual 0 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member]    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing Receivable, Nonaccrual $ 0 $ 0
v3.19.3.a.u2
Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans $ 33,060  
Consumer [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 2,018  
Commercial business: Secured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 26,615  
Commercial business: Unsecured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 359  
Real estate: One-to-four family residential [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 591  
Real estate: Commercial and multifamily residential: Commercial land [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 1,985  
Real estate: Commercial and multifamiIy residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 1,287  
Real estate construction: One-to-four family residential: Land and acquisition [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 0  
Real estate construction: One-to-four family residential: Residential construction [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 0  
Real estate: Commercial and multifamiIy residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Nonaccrual Loans 205  
Loans, Excluding Purchased Credit Impaired Loans [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 8,609,241 $ 8,218,651
Total Past Due 23,648 28,258
Nonaccrual Loans 33,060 54,842
Financing Receivable, after Allowance for Credit Loss 8,665,949 8,301,751
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 88,389 194,912
Total Past Due 0 0
Nonaccrual Loans 0 0
Financing Receivable, after Allowance for Credit Loss 88,389 194,912
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 290,174 314,008
Total Past Due 379 1,258
Nonaccrual Loans 2,018 2,949
Financing Receivable, after Allowance for Credit Loss 292,571 318,215
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Secured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 3,422,313 3,267,709
Total Past Due 12,719 9,488
Nonaccrual Loans 26,615 35,504
Financing Receivable, after Allowance for Credit Loss 3,461,647 3,312,701
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Unsecured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 128,852 111,868
Total Past Due 472 240
Nonaccrual Loans 359 9
Financing Receivable, after Allowance for Credit Loss 129,683 112,117
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 261,886 233,941
Total Past Due 2,418 927
Nonaccrual Loans 591 1,158
Financing Receivable, after Allowance for Credit Loss 264,895 236,026
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 300,580 283,416
Total Past Due 625 0
Nonaccrual Loans 1,985 2,261
Financing Receivable, after Allowance for Credit Loss 303,190 285,677
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 1,795,771 1,606,085
Total Past Due 4,287 1,744
Nonaccrual Loans 1,287 9,922
Financing Receivable, after Allowance for Credit Loss 1,801,345 1,617,751
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Land and acquisition [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 1,364 4,099
Total Past Due 0 0
Nonaccrual Loans 0 318
Financing Receivable, after Allowance for Credit Loss 1,364 4,417
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Residential construction [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 189,350 212,303
Total Past Due 951 93
Nonaccrual Loans 0 0
Financing Receivable, after Allowance for Credit Loss 190,301 212,396
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 2,057,359 1,910,505
Total Past Due 1,797 7,250
Nonaccrual Loans 205 2,721
Financing Receivable, after Allowance for Credit Loss 2,059,361 1,920,476
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Current Loans 73,203 79,805
Total Past Due 0 7,258
Nonaccrual Loans 0 0
Financing Receivable, after Allowance for Credit Loss 73,203 87,063
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 18,182 21,959
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 284 1,057
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Secured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 7,684 5,864
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Unsecured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 392 240
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 2,162 694
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 625 0
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 4,287 1,744
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Land and acquisition [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Residential construction [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 951 93
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 1,797 5,009
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 7,258
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 5,466 6,299
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 95 201
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Secured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 5,035 3,624
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Unsecured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 80 0
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 256 233
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Land and acquisition [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Residential construction [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 2,241
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Secured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Unsecured loans [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Land and acquisition [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Residential construction [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due 0 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member]    
Financing Receivable, Past Due [Line Items]    
Total Past Due $ 0 $ 0
v3.19.3.a.u2
Loans (Analysis of Impaired Loans) (Details) - Loans, Excluding Purchased Credit Impaired Loans [Member]
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
Modifications
Dec. 31, 2018
USD ($)
Modifications
Dec. 31, 2017
USD ($)
Modifications
Financing Receivable, Modifications, Number of Contracts | Modifications 24 34 60
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 8,633,955 $ 8,252,647  
Recorded Investment of Loans Individually Measured for Specific Impairment 31,994 49,104  
Recorded Investment 483 3,326  
Unpaid Principal Balance 637 3,584  
Related Allowance 22 31  
Impaired Financing Receivable, Average Recorded Investment 42,731 65,461 $ 40,650
Impaired Financing Receivable, Interest Income, Accrual Method $ 452 $ 1,138 $ 971
Commercial business: Secured loans [Member]      
Financing Receivable, Modifications, Number of Contracts | Modifications 11 12 10
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 3,437,564 $ 3,286,416  
Recorded Investment of Loans Individually Measured for Specific Impairment 24,083 26,285  
Recorded Investment 3,286 6,350  
Unpaid Principal Balance 3,851 8,460  
Related Allowance 93 2,023  
Impaired Financing Receivable, Average Recorded Investment 24,682 39,701 $ 20,282
Impaired Financing Receivable, Interest Income, Accrual Method $ 202 $ 81 $ 60
Commercial business: Unsecured loans [Member]      
Financing Receivable, Modifications, Number of Contracts | Modifications 0 0 1
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 129,671 $ 112,097  
Recorded Investment of Loans Individually Measured for Specific Impairment 12 20  
Recorded Investment 12 20  
Unpaid Principal Balance 12 20  
Related Allowance 0 0  
Impaired Financing Receivable, Average Recorded Investment 16 191 $ 5
Impaired Financing Receivable, Interest Income, Accrual Method $ 1 $ 2 $ 0
Real estate: One-to-four family residential [Member]      
Financing Receivable, Modifications, Number of Contracts | Modifications 1 0 3
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 264,513 $ 235,138  
Recorded Investment of Loans Individually Measured for Specific Impairment 382 888  
Recorded Investment 299 325  
Unpaid Principal Balance 588 798  
Related Allowance 5 8  
Impaired Financing Receivable, Average Recorded Investment 665 748 $ 730
Impaired Financing Receivable, Interest Income, Accrual Method $ 42 $ 42 $ 49
Real estate: Commercial and multifamily residential: Commercial land [Member]      
Financing Receivable, Modifications, Number of Contracts | Modifications 0 0 1
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 300,973 $ 283,451  
Recorded Investment of Loans Individually Measured for Specific Impairment 2,217 2,226  
Recorded Investment 1,592 0  
Unpaid Principal Balance 1,601 0  
Related Allowance 312 0  
Impaired Financing Receivable, Average Recorded Investment 2,606 2,371 $ 2,079
Impaired Financing Receivable, Interest Income, Accrual Method $ 31 $ 34 $ 0
Real estate: Commercial and multifamiIy residential: Income property [Member]      
Financing Receivable, Modifications, Number of Contracts | Modifications 1 1 1
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 2,059,361 $ 1,917,522  
Recorded Investment of Loans Individually Measured for Specific Impairment 0 2,954  
Recorded Investment 0 99  
Unpaid Principal Balance 0 165  
Related Allowance 0 1  
Impaired Financing Receivable, Average Recorded Investment 1,121 3,284 $ 4,314
Impaired Financing Receivable, Interest Income, Accrual Method $ 0 $ 130 $ 51
Real estate: Commercial and multifamiIy residential: Owner occupied [Member]      
Financing Receivable, Modifications, Number of Contracts | Modifications 0 0 1
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 1,797,682 $ 1,605,042  
Recorded Investment of Loans Individually Measured for Specific Impairment 3,663 12,709  
Recorded Investment 3,663 3,231  
Unpaid Principal Balance 5,233 4,666  
Related Allowance 29 69  
Impaired Financing Receivable, Average Recorded Investment 10,681 9,730 $ 5,335
Impaired Financing Receivable, Interest Income, Accrual Method 168 720 445
Real estate construction: One-to-four family residential: Land and acquisition [Member]      
Recorded Investment of Loans Collectively Measured for Contingency Provision 1,364 4,417  
Recorded Investment of Loans Individually Measured for Specific Impairment 0 0  
Recorded Investment 0 0  
Unpaid Principal Balance 0 0  
Related Allowance 0 0  
Impaired Financing Receivable, Average Recorded Investment 0 0 3
Impaired Financing Receivable, Interest Income, Accrual Method 0 0 0
Real estate construction: One-to-four family residential: Residential construction [Member]      
Recorded Investment of Loans Collectively Measured for Contingency Provision 190,301 212,396  
Recorded Investment of Loans Individually Measured for Specific Impairment 0 0  
Recorded Investment 0 0  
Unpaid Principal Balance 0 0  
Related Allowance 0 0  
Impaired Financing Receivable, Average Recorded Investment 0 484 309
Impaired Financing Receivable, Interest Income, Accrual Method 0 0 $ 0
Real estate construction: Commercial and multifamily residential: Income property [Member]      
Recorded Investment of Loans Collectively Measured for Contingency Provision 88,389 194,912  
Recorded Investment of Loans Individually Measured for Specific Impairment 0 0  
Recorded Investment 0 0  
Unpaid Principal Balance 0 0  
Related Allowance $ 0 $ 0  
Real estate construction: Commercial and multifamily residential: Owner occupied [Member]      
Financing Receivable, Modifications, Number of Contracts | Modifications 0 0 1
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 73,203 $ 87,063  
Recorded Investment of Loans Individually Measured for Specific Impairment 0 0  
Recorded Investment 0 0  
Unpaid Principal Balance 0 0  
Related Allowance 0 0  
Impaired Financing Receivable, Average Recorded Investment 0 3,240 $ 1,620
Impaired Financing Receivable, Interest Income, Accrual Method $ 0 $ 0 $ 203
Consumer [Member]      
Financing Receivable, Modifications, Number of Contracts | Modifications 11 21 42
Recorded Investment of Loans Collectively Measured for Contingency Provision $ 290,934 $ 314,193  
Recorded Investment of Loans Individually Measured for Specific Impairment 1,637 4,022  
Impaired Financing Receivable, Average Recorded Investment 2,960 5,712 $ 5,973
Impaired Financing Receivable, Interest Income, Accrual Method 8 129 $ 163
Impaired Loans Without Recorded Allowance [Member]      
Recorded Investment 22,659 35,753  
Unpaid Principal Balance 30,813 40,716  
Impaired Loans With Recorded Allowance [Member]      
Recorded Investment 9,335 13,351  
Unpaid Principal Balance 11,922 17,693  
Related Allowance 461 2,132  
Impaired Loans Without Recorded Allowance [Member]      
Recorded Investment 1,154 696  
Unpaid Principal Balance 1,310 704  
Impaired Loans Without Recorded Allowance [Member] | Commercial business: Secured loans [Member]      
Recorded Investment 20,797 19,935  
Unpaid Principal Balance 28,658 24,404  
Impaired Loans Without Recorded Allowance [Member] | Commercial business: Unsecured loans [Member]      
Recorded Investment 0 0  
Unpaid Principal Balance 0 0  
Impaired Loans Without Recorded Allowance [Member] | Real estate: One-to-four family residential [Member]      
Recorded Investment 83 563  
Unpaid Principal Balance 182 575  
Impaired Loans Without Recorded Allowance [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member]      
Recorded Investment 625 2,226  
Unpaid Principal Balance 663 2,272  
Impaired Loans Without Recorded Allowance [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member]      
Recorded Investment 0 2,855  
Unpaid Principal Balance 0 3,011  
Impaired Loans Without Recorded Allowance [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member]      
Recorded Investment 0 9,478  
Unpaid Principal Balance 0 9,750  
Impaired Loans Without Recorded Allowance [Member] | Real estate construction: One-to-four family residential: Land and acquisition [Member]      
Recorded Investment 0 0  
Unpaid Principal Balance 0 0  
Impaired Loans Without Recorded Allowance [Member] | Real estate construction: One-to-four family residential: Residential construction [Member]      
Recorded Investment 0 0  
Unpaid Principal Balance 0 0  
Impaired Loans Without Recorded Allowance [Member] | Real estate construction: Commercial and multifamily residential: Income property [Member]      
Recorded Investment 0 0  
Unpaid Principal Balance 0 0  
Impaired Loans Without Recorded Allowance [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member]      
Recorded Investment 0 0  
Unpaid Principal Balance $ 0 $ 0  
v3.19.3.a.u2
Loans Loans (Analysis of Troubled Debt Restructurings) (Details)
loan in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
Modifications
contract
Dec. 31, 2018
USD ($)
loan
Modifications
contract
Dec. 31, 2017
USD ($)
Modifications
contract
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable Modifications Additional Commitment To Lend $ 1,100,000 $ 2,100,000  
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract 1 0 0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default $ 26,000 $ 0 $ 0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans | loan   0.0  
Loans, Excluding Purchased Credit Impaired Loans [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 24 34 60
Pre-Modification Outstanding Recorded Investment $ 7,348,000 $ 22,047,000 $ 18,122,000
Post-Modification Outstanding Recorded Investment $ 7,348,000 $ 22,047,000 $ 18,122,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Secured loans [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 11 12 10
Pre-Modification Outstanding Recorded Investment $ 6,642,000 $ 18,379,000 $ 5,655,000
Post-Modification Outstanding Recorded Investment $ 6,642,000 $ 18,379,000 $ 5,655,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Unsecured loans [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 0 0 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 26,000
Post-Modification Outstanding Recorded Investment $ 0 $ 0 $ 26,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 1 0 3
Pre-Modification Outstanding Recorded Investment $ 45,000 $ 0 $ 583,000
Post-Modification Outstanding Recorded Investment $ 45,000 $ 0 $ 583,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 0 0 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 687,000
Post-Modification Outstanding Recorded Investment $ 0 $ 0 $ 687,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 1 1 1
Pre-Modification Outstanding Recorded Investment $ 217,000 $ 891,000 $ 1,152,000
Post-Modification Outstanding Recorded Investment $ 217,000 $ 891,000 $ 1,152,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 0 0 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 78,000
Post-Modification Outstanding Recorded Investment $ 0 $ 0 $ 78,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 0 0 1
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 4,050,000
Post-Modification Outstanding Recorded Investment $ 0 $ 0 $ 4,050,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member]      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Financing Receivable, Modifications, Number of Contracts | Modifications 11 21 42
Pre-Modification Outstanding Recorded Investment $ 444,000 $ 2,777,000 $ 5,891,000
Post-Modification Outstanding Recorded Investment $ 444,000 $ 2,777,000 $ 5,891,000
v3.19.3.a.u2
Loans Loans, analysis of purchased credit impaired loans (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Allowance $ 83,968 $ 83,369 $ 75,646 $ 70,043
Loans and Leases Receivable, Net Amount 8,659,497 8,308,142    
Commercial Portfolio Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 3,610,460 3,447,662    
Real estate: One-to-four family residential [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 272,347 246,384    
Loans and Leases Receivable, Allowance 607 593 701 599
Commercial and Multifamily Residential [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 4,238,173 3,908,937    
Real Estate Portfolio Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 4,510,520 4,155,321    
One-to-Four Family Residential Construction [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 192,762 217,943    
Commercial and Multifamily Residential Construction [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 163,103 284,928    
Real Estate Construction Portfolio Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 355,865 502,871    
Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 300,935 327,851    
Loans and Leases Receivable, Allowance 4,455 5,301 $ 5,163 $ 3,534
Purchased Credit Impaired Loans [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 82,272 96,285    
Valuation discount resulting from acquisition accounting 4,756 6,525    
Loans and Leases Receivable, Allowance 2,844 3,611    
Loans and Leases Receivable, Net Amount 74,672 86,149    
Purchased Credit Impaired Loans [Member] | Commercial Portfolio Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,083 9,672    
Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,453 9,848    
Purchased Credit Impaired Loans [Member] | Commercial and Multifamily Residential [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 56,752 66,340    
Purchased Credit Impaired Loans [Member] | Real Estate Portfolio Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 65,205 76,188    
Purchased Credit Impaired Loans [Member] | One-to-Four Family Residential Construction [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 153    
Purchased Credit Impaired Loans [Member] | Commercial and Multifamily Residential Construction [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 507    
Purchased Credit Impaired Loans [Member] | Real Estate Construction Portfolio Segment [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 660    
Purchased Credit Impaired Loans [Member] | Consumer [Member]        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount $ 8,984 $ 9,765    
v3.19.3.a.u2
Loans Loans (Analysis of Purchased Credit Impaired - Accretable Yield Rollforward) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Loans, Analysis of Purchased Credit Impaired Loans, Accretable Yield Rollforward [Abstract]        
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield $ 19,661 $ 21,949 $ 31,176 $ 45,191
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion (6,053) (8,194) (12,357)  
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Disposals of Loans (46) 387 158  
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference $ 3,719 $ (646) $ (1,500)  
v3.19.3.a.u2
Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Allowance for Noncovered Loan and Lease Losses) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       $ 83,369       $ 75,646 $ 83,369 $ 75,646 $ 70,043
Charge-offs                 (15,215) (18,555) (16,660)
Recoveries                 12,321 11,509 13,632
Provision for loan and lease losses $ 1,614 $ 299 $ 218 1,362 $ 1,789 $ 3,153 $ 3,975 5,852 3,493 14,769 8,631
Balance at the end of year 83,968       83,369       83,968 83,369 75,646
Specific Reserve 461       2,132       461 2,132 2,360
General Allocation 83,507       81,237       83,507 81,237 73,286
Consumer [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       5,301       5,163 5,301 5,163 3,534
Charge-offs                 (1,400) (1,194) (1,474)
Recoveries                 930 1,180 1,187
Provision for loan and lease losses                 (376) 152 1,916
Balance at the end of year 4,455       5,301       4,455 5,301 5,163
Specific Reserve 22       31       22 31 199
General Allocation 4,433       5,270       4,433 5,270 4,964
Purchased Credit Impaired Loans [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       3,611       6,907 3,611 6,907 10,515
Charge-offs                 (3,319) (4,862) (6,812)
Recoveries                 3,979 3,847 6,187
Provision for loan and lease losses                 (1,427) (2,281) (2,983)
Balance at the end of year 2,844       3,611       2,844 3,611 6,907
Specific Reserve 0       0       0 0 0
General Allocation 2,844       3,611       2,844 3,611 6,907
Unallocated Financing Receivables [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       1,053       0 1,053 0 226
Charge-offs                 0 0 0
Recoveries                 0 0 0
Provision for loan and lease losses                 (453) 1,053 (226)
Balance at the end of year 600       1,053       600 1,053 0
Specific Reserve 0       0       0 0 0
General Allocation 600       1,053       600 1,053 0
Commercial business: Secured loans [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       43,188       29,341 43,188 29,341 36,050
Charge-offs                 (10,249) (11,560) (7,524)
Recoveries                 2,755 3,024 4,283
Provision for loan and lease losses                 7,381 22,383 (3,468)
Balance at the end of year 43,075       43,188       43,075 43,188 29,341
Specific Reserve 93       2,023       93 2,023 1,867
General Allocation 42,982       41,165       42,982 41,165 27,474
Commercial business: Unsecured loans [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       2,626       2,000 2,626 2,000 960
Charge-offs                 (75) (159) (89)
Recoveries                 350 403 553
Provision for loan and lease losses                 184 382 576
Balance at the end of year 3,085       2,626       3,085 2,626 2,000
Specific Reserve 0       0       0 0 3
General Allocation 3,085       2,626       3,085 2,626 1,997
Real estate: One-to-four family residential [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       593       701 593 701 599
Charge-offs                 (2) 0 (460)
Recoveries                 242 408 568
Provision for loan and lease losses                 (226) (516) (6)
Balance at the end of year 607       593       607 593 701
Specific Reserve 5       8       5 8 103
General Allocation 602       585       602 585 598
Real estate: Commercial and multifamily residential: Commercial land [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       3,947       4,265 3,947 4,265 1,797
Charge-offs                 0 0 0
Recoveries                 286 99 53
Provision for loan and lease losses                 2,146 (417) 2,415
Balance at the end of year 6,379       3,947       6,379 3,947 4,265
Specific Reserve 312       0       312 0 0
General Allocation 6,067       3,947       6,067 3,947 4,265
Real estate: Commercial and multifamiIy residential: Income property [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       4,044       5,672 4,044 5,672 7,342
Charge-offs                 0 (780) (287)
Recoveries                 320 912 498
Provision for loan and lease losses                 2,062 (1,760) (1,881)
Balance at the end of year 6,426       4,044       6,426 4,044 5,672
Specific Reserve 0       1       0 1 185
General Allocation 6,426       4,043       6,426 4,043 5,487
Real estate: Commercial and multifamiIy residential: Owner occupied [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       4,533       5,459 4,533 5,459 6,439
Charge-offs                 0 0 0
Recoveries                 4 20 124
Provision for loan and lease losses                 1,567 (946) (1,104)
Balance at the end of year 6,104       4,533       6,104 4,533 5,459
Specific Reserve 29       69       29 69 3
General Allocation 6,075       4,464       6,075 4,464 5,456
Real estate construction: One-to-four family residential: Land and acquisition [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       549       963 549 963 316
Charge-offs                 0 0 (14)
Recoveries                 362 726 72
Provision for loan and lease losses                 (799) (1,140) 589
Balance at the end of year 112       549       112 549 963
Specific Reserve 0       0       0 0 0
General Allocation 112       549       112 549 963
Real estate construction: One-to-four family residential: Residential construction [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       5,536       3,709 5,536 3,709 669
Charge-offs                 (170) 0 0
Recoveries                 3,092 890 106
Provision for loan and lease losses                 (3,982) 937 2,934
Balance at the end of year 4,476       5,536       4,476 5,536 3,709
Specific Reserve 0       0       0 0 0
General Allocation 4,476       5,536       4,476 5,536 3,709
Real estate construction: Commercial and multifamily residential: Income property [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       5,784       7,053 5,784 7,053 404
Charge-offs                 0 0 0
Recoveries                 1 0 1
Provision for loan and lease losses                 (3,286) (1,269) 6,648
Balance at the end of year 2,499       5,784       2,499 5,784 7,053
Specific Reserve 0       0       0 0 0
General Allocation 2,499       5,784       2,499 5,784 7,053
Real estate construction: Commercial and multifamily residential: Owner occupied [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Balance at beginning of year       $ 2,604       $ 4,413 2,604 4,413 1,192
Charge-offs                 0 0 0
Recoveries                 0 0 0
Provision for loan and lease losses                 702 (1,809) 3,221
Balance at the end of year 3,306       2,604       3,306 2,604 4,413
Specific Reserve 0       0       0 0 0
General Allocation $ 3,306       $ 2,604       $ 3,306 $ 2,604 $ 4,413
v3.19.3.a.u2
Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Changes in the Allowance for Unfunded Commitments and Letters of Credit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Allowance For Loan And Lease Losses And Unfunded Loan Commitments And Letters Of Credit      
Beginning balance $ 4,330 $ 3,130 $ 2,705
Net changes in the allowance for unfunded commitments and letters of credit (900) 1,200 425
Ending balance $ 3,430 $ 4,330 $ 3,130
v3.19.3.a.u2
Allowance for Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Analysis of Credit Quality of Loan Portfolio) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans, net of unearned income $ 8,743,465 $ 8,391,511    
Loans and Leases Receivable, Allowance 83,968 83,369 $ 75,646 $ 70,043
Loans, net 8,659,497 8,308,142    
Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,665,949 8,301,751    
Loans, net of unearned income 8,665,949 8,301,751    
Loans and Leases Receivable, Allowance 81,124 79,758    
Loans, net 8,584,825 8,221,993    
Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 82,272 96,285    
Loans, net of unearned income 77,516 89,760    
Valuation discount resulting from acquisition accounting 4,756 6,525    
Loans and Leases Receivable, Allowance 2,844 3,611    
Loans, net 74,672 86,149    
Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,388,434 8,029,658    
Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 71,807 94,337    
Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 50,554 105,844    
Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 1,459 0    
Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 226,961 166,239    
Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 9,006 1,948    
Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 10    
Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Commercial Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 3,610,460 3,447,662    
Commercial Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 3,602,597 3,438,422    
Commercial Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,083 9,672    
Loans, net of unearned income 7,863 9,240    
Commercial business: Secured loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 43,075 43,188 29,341 36,050
Commercial business: Secured loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 3,461,647 3,312,701    
Commercial business: Secured loans [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 7,677 8,881    
Commercial business: Secured loans [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 3,296,776 3,160,910    
Commercial business: Secured loans [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 6,109 8,041    
Commercial business: Secured loans [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 37,394 48,779    
Commercial business: Secured loans [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 962 0    
Commercial business: Secured loans [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 127,477 103,007    
Commercial business: Secured loans [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 606 840    
Commercial business: Secured loans [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 5    
Commercial business: Secured loans [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Commercial business: Secured loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Commercial business: Secured loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Commercial business: Unsecured loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 3,085 2,626 2,000 960
Commercial business: Unsecured loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 129,683 112,117    
Commercial business: Unsecured loans [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 406 791    
Commercial business: Unsecured loans [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 129,518 112,091    
Commercial business: Unsecured loans [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 406 692    
Commercial business: Unsecured loans [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 21    
Commercial business: Unsecured loans [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Commercial business: Unsecured loans [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 165 0    
Commercial business: Unsecured loans [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 99    
Commercial business: Unsecured loans [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 5    
Commercial business: Unsecured loans [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Commercial business: Unsecured loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Commercial business: Unsecured loans [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real Estate Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 4,510,520 4,155,321    
Real Estate Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 4,449,105 4,084,394    
Real Estate Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 65,205 76,188    
Loans, net of unearned income 61,415 70,927    
Real estate: One-to-four family residential [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 272,347 246,384    
Loans and Leases Receivable, Allowance 607 593 701 599
Real estate: One-to-four family residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 265,144 238,367    
Loans, net of unearned income 264,895 236,026    
Real estate: One-to-four family residential [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,453 9,848    
Loans, net of unearned income 7,203 8,017    
Real estate: One-to-four family residential [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 264,051 234,416    
Real estate: One-to-four family residential [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,351 9,633    
Real estate: One-to-four family residential [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: One-to-four family residential [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: One-to-four family residential [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 844 1,610    
Real estate: One-to-four family residential [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 102 215    
Real estate: One-to-four family residential [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: One-to-four family residential [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: One-to-four family residential [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: One-to-four family residential [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamily residential: Commercial land [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 6,379 3,947 4,265 1,797
Real estate: Commercial and multifamily residential: Commercial land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 303,190 285,677    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 9,429 10,363    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 283,254 276,348    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,720 10,363    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 1,344 5,082    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 497 0    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 18,592 4,247    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 212 0    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamily residential: Commercial land [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Income property [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 6,426 4,044 5,672 7,342
Real estate: Commercial and multifamiIy residential: Income property [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 2,059,361 1,920,476    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 18,683 19,680    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 2,014,233 1,876,925    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 18,386 19,680    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 5,658 36,998    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 39,470 6,553    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 297 0    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Income property [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 6,104 4,533 5,459 6,439
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 1,801,345 1,617,751    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 28,640 36,297    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 1,757,757 1,556,852    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 21,077 35,944    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 6,158 14,964    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 37,430 45,935    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 7,563 353    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate: Commercial and multifamiIy residential: Owner occupied [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real Estate Construction Portfolio Segment [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 355,865 502,871    
Real Estate Construction Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 355,865 502,184    
Real Estate Construction Portfolio Segment [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 660    
Loans, net of unearned income 0 687    
Real estate construction: One-to-four family residential: Land and acquisition [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 112 549 963 316
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 1,364 4,417    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   153    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 1,364 4,099    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   151    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   0    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 318    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   2    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   0    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: One-to-four family residential: Land and acquisition [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   0    
Real estate construction: One-to-four family residential: Residential construction [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 4,476 5,536 3,709 669
Real estate construction: One-to-four family residential: Residential construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 190,301 212,396    
Real estate construction: One-to-four family residential: Residential construction [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 190,301 212,225    
Real estate construction: One-to-four family residential: Residential construction [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: One-to-four family residential: Residential construction [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 171    
Real estate construction: One-to-four family residential: Residential construction [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: One-to-four family residential: Residential construction [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: Commercial and multifamily residential: Income property [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 2,499 5,784 7,053 404
Real estate construction: Commercial and multifamily residential: Income property [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 88,389 194,912    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   507    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 88,389 194,912    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   507    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   0    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   0    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   0    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: Commercial and multifamily residential: Income property [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount   0    
Real estate construction: Commercial and multifamily residential: Owner occupied [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Allowance 3,306 2,604 4,413 1,192
Real estate construction: Commercial and multifamily residential: Owner occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 73,203 87,063    
Real estate construction: Commercial and multifamily residential: Owner occupied [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 73,203 87,063    
Real estate construction: Commercial and multifamily residential: Owner occupied [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: Commercial and multifamily residential: Owner occupied [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: Commercial and multifamily residential: Owner occupied [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Real estate construction: Commercial and multifamily residential: Owner occupied [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Consumer [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 300,935 327,851    
Loans and Leases Receivable, Allowance 4,455 5,301 $ 5,163 $ 3,534
Consumer [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 292,697 318,945    
Loans, net of unearned income 292,571 318,215    
Consumer [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,984 9,765    
Loans, net of unearned income 8,238 8,906    
Consumer [Member] | Pass [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 289,588 313,817    
Consumer [Member] | Pass [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 8,758 9,326    
Consumer [Member] | Special Mention [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Consumer [Member] | Special Mention [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Consumer [Member] | Substandard [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 2,983 4,398    
Consumer [Member] | Substandard [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 226 439    
Consumer [Member] | Doubtful [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Consumer [Member] | Doubtful [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Consumer [Member] | Unlikely to be Collected Financing Receivable [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount 0 0    
Consumer [Member] | Unlikely to be Collected Financing Receivable [Member] | Purchased Credit Impaired Loans [Member]        
Financing Receivable, Credit Quality Indicator [Line Items]        
Loans and Leases Receivable, Gross, Carrying Amount $ 0 $ 0    
v3.19.3.a.u2
Other Real Estate Owned (Summary of Other Real Estate Owned) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Other Real Estate Owned [Line Items]    
Balance, beginning of period $ 6,019 $ 13,298
Transfers in 386 1,200
Valuation adjustments (195) (698)
Proceeds from sale of OREO property 6,455 7,261
Gain (loss) on sale of OREO, net 797 (520)
Balance, end of period 552 $ 6,019
Mortgage Loans in Process of Foreclosure, Amount 875  
Real estate: One-to-four family residential [Member]    
Other Real Estate Owned [Line Items]    
Balance, end of period $ 311  
v3.19.3.a.u2
Premises and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 243,329 $ 243,095  
Less accumulated depreciation and amortization (77,921) (74,307)  
Total 165,408 168,788  
Depreciation and amortization expense 10,300 10,400 $ 9,800
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 53,124 54,185  
Building [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 107,371 108,890  
Leasehold Improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 28,459 27,859  
Furniture and Fixtures [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 37,929 32,292  
Vehicles [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross 510 511  
Software [Member]      
Property, Plant and Equipment [Line Items]      
Property, Plant and Equipment, Gross $ 15,936 $ 19,358  
v3.19.3.a.u2
Goodwill and Intangible Assets (Schedule of Goodwill and Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets [Line Items]      
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 919 $ 919 $ 919
Intangible Assets, Net (Excluding Goodwill) 35,458 45,937 58,173
Goodwill and Intangible Assets [Roll Forward]      
Total goodwill, beginning of period 765,842 765,842 382,762
Established through acquisitions [1] 0 0 383,080
Total goodwill, end of period 765,842 765,842 765,842
Core deposit intangible, net, beginning of period 45,937    
CDI current period amortization (10,479) (12,236) (6,333)
Total core deposit intangible, end of period 35,458 45,937  
Total goodwill and intangible assets, end of period 801,300 811,779 824,015
Core Deposits [Member]      
Goodwill and Intangible Assets [Roll Forward]      
Gross core deposit intangible balance, beginning of period 105,473 105,473 58,598
Accumulated amortization, beginning of period (60,455) (48,219) (41,886)
Core deposit intangible, net, beginning of period 45,018 57,254 16,712
Established through acquisitions [1] 0 0 46,875
CDI current period amortization (10,479) (12,236) (6,333)
Total core deposit intangible, end of period $ 34,539 $ 45,018 $ 57,254
Estimated life of CDI, in years 10 years    
[1] See Note 2, “Business Combinations,” for additional information regarding the goodwill and CDI related to the acquisition of Pacific Continental on November 1, 2017.
v3.19.3.a.u2
Goodwill and Intangible Assets (Summary of Estimated Future Amortization Expense of Core Deposit Intangibles) (Details) - Core Deposits [Member]
$ in Thousands
Dec. 31, 2019
USD ($)
Future Amortization Expense For Core Deposit Intangibles  
2020 $ 8,724
2021 7,264
2022 5,880
2023 4,552
2024 $ 3,432
v3.19.3.a.u2
Leases (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 26, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Other Commitments [Line Items]        
Operating Lease, Right-of-Use Asset   $ 57,226    
Operating Lease, Liability   $ 63,030    
Operating Lease, Weighted Average Remaining Lease Term   7 years 8 months 12 days    
Operating Lease, Weighted Average Discount Rate, Percent   3.00%    
Operating Lease, Payments   $ 11,200    
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability   20,600    
Operating Lease, Cost [1]   10,851    
Variable Lease, Cost   1,805    
Sublease Income   (1,182)    
Net lease, Cost   11,474    
Operating Leases, Rent Expense, Sublease Rentals     $ 1,200 $ 791
Operating Leases, Rent Expense, Net     $ 9,600 $ 7,900
WASHINGTON        
Other Commitments [Line Items]        
Sale and Leaseback Transaction, Gain (Loss), Net $ (5,900)      
Bellevue Way [Domain] | WASHINGTON        
Other Commitments [Line Items]        
Sale Leaseback Transaction, Monthly Rental Payments   $ 19    
[1] Includes short-term lease costs, which are immaterial.
v3.19.3.a.u2
Future minimum payments for operating leases (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Leases [Abstract]  
2020 $ 11,105
2021 11,126
2022 10,689
2023 9,476
2024 6,980
Thereafter 21,866
Total future minimum lease payments 71,242
Amounts representing interest 8,212
Present value of minimum lease payments $ 63,030
v3.19.3.a.u2
Leases Prior disclosed minimum lease payments schedule (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases ASC 840 [Abstract]  
2019 $ 10,947
2020 9,766
2021 8,729
2022 8,102
2023 6,796
Thereafter 18,703
Total minimum payments $ 63,043
v3.19.3.a.u2
Deposits (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Deposits [Abstract]    
Demand and other noninterest-bearing $ 5,328,146 $ 5,227,216
Money market [1] 2,322,644 2,294,125
Interest-bearing demand [1] 1,150,437 1,084,863
Savings [1] 882,050 889,849
Interest-bearing public funds, other than certificates of deposit [1] 301,203 233,938
Certificates of deposit less than $250,000 218,764 243,849
Certificates of deposit greater than $250,000 151,995 89,473
Certificates of deposit insured by CDARS® 17,065 23,580
Brokered certificates of deposit 12,259 57,930
Reciprocal money market accounts 300,158 313,692
Subtotal 10,684,721 10,458,515
Deposits, Valuation Adjustment From Acquisition Accounting (13) (389)
Total deposits 10,684,708 10,458,126
Deposit Liabilities Reclassified as Loans Receivable 3,800 $ 4,000
Time Deposits, Fiscal Year Maturity [Abstract]    
2020 313,241  
2021 53,679  
2022 19,346  
2023 8,060  
2024 5,593  
Thereafter 151  
Total $ 400,070  
[1] Beginning in 2019, interest-bearing public funds, other than certificates of deposit, are presented separately in this table. Prior period amounts have been reclassified to conform to current period presentation.
v3.19.3.a.u2
Federal Home Loan Bank and Federal Reserve Bank Borrowings (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
FHLB Fixed Rate Advances, Maturities Summary [Abstract]      
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate of Amounts Due within One Year of Balance Sheet Date 1.82%    
Federal Home Loan Bank, Advances, Maturities Summary, Fixed Rate, under One Year $ 946,000    
Federal Home Loan Bank, Advances, Maturities Summary, Average Interest Rate, One To Five Years From Balance Sheet Date 3.85%    
FHLB Fixed Rate Advances, Over 1 through 5 years $ 2,000    
FHLB Fixed Rate Advances, Weighted Average Interest Rate, Due after 10 years 5.37%    
FHLB Fixed Rate Advances, Due after 10 years $ 5,000    
FHLB Fixed Rate Advances, Total Amount before valuation adjustment 953,000 $ 399,000  
Valuation adjustment from acquisition accounting 469    
FHLB Fixed Rate Advances, Total Amount 953,469    
Federal Home Loan Bank, Advances, Activity for Year [Abstract]      
FHLB Advances 953,469 399,523 $ 11,579
Federal Home Loan Bank, Advances, Activity for Year, Average Balance of Agreements Outstanding 469,983 166,563 79,788
Maximum month-end balance during the year $ 953,469 $ 399,523 $ 317,480
Weighted average rate during the year 2.42% 2.29% 1.33%
Weighted average rate at December 31 1.84% 2.68% 4.08%
FHLB Borrowing Capacity $ 1,960,000 $ 1,620,000  
Federal Reserve Bank, Advances, Activity for Year [Abstract]      
Average balance during the year 99 14  
Federal Reserve Bank borrowing capacity $ 209,100 $ 107,100  
v3.19.3.a.u2
Securities Sold Under Agreements to Repurchase (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Available-for-sale Securities [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Assets Sold under Agreements to Repurchase, Term, Carrying Amounts $ 25.0
Assets Sold under Agreements to Repurchase, Term, Interest Rate 1.88%
Repurchase Agreements, Sweep [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Carrying amount of securities pledged as collateral $ 76.0
Repurchase Agreements, Sweep [Member] | Available-for-sale Securities [Member]  
Assets Sold under Agreements to Repurchase [Line Items]  
Assets Sold under Agreements to Repurchase, Sweep, Carrying Amount $ 64.4
Assets Sold under Agreements to Repurchase, Sweep, Interest rate 1.24%
v3.19.3.a.u2
Subordinated debentures (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Nov. 01, 2017
Subordinated Borrowing [Line Items]    
Subordinated Borrowing, Interest Rate 5.875%  
Pacific Continental [Member]    
Subordinated Borrowing [Line Items]    
Business Combination, Purchase Price Allocation, Subordinated Debt   $ 35.0
Subordinated Debt [Member]    
Subordinated Borrowing [Line Items]    
Debt Instrument, Interest Rate Terms 4.715%  
v3.19.3.a.u2
Revolving line of credit (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Line of Credit Facility [Line Items]  
Line of Credit Facility, Maximum Borrowing Capacity $ 30,000
Line of Credit [Member]  
Line of Credit Facility [Line Items]  
Short-term Debt $ 0
v3.19.3.a.u2
Derivatives and Balance Sheet Offsetting (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Derivative [Line Items]      
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net $ 3,200    
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) 15,322 $ 0  
Gain (Loss) on Derivative Instruments, Net, Pretax (1) 8 $ 16
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement 64,437    
Secured Borrowings, Gross, Difference, Amount 0    
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 595 0  
Designated as Hedging Instrument [Member] | Interest rate collar [Domain]      
Derivative [Line Items]      
Derivative, Notional Amount 500,000    
Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest rate collar [Domain]      
Derivative [Line Items]      
Derivative Asset, Fair Value, Gross Asset 14,727 0  
Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest rate collar [Domain]      
Derivative [Line Items]      
Derivative Liability, Fair Value, Gross Liability 0 0  
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member]      
Derivative [Line Items]      
Derivative, Notional Amount 428,600 366,700  
Not Designated as Hedging Instrument [Member] | Other Assets [Member] | Interest Rate Contracts [Member]      
Derivative [Line Items]      
Derivative Asset, Fair Value, Gross Asset 19,144 7,033  
Not Designated as Hedging Instrument [Member] | Other Liabilities [Member] | Interest Rate Contracts [Member]      
Derivative [Line Items]      
Derivative Liability, Fair Value, Gross Liability 19,145 $ 7,033  
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]      
Derivative [Line Items]      
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement 64,437    
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member] | Maturity Overnight [Member]      
Derivative [Line Items]      
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement 64,437    
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member] | Maturity Less than 30 Days [Member]      
Derivative [Line Items]      
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement 0    
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member] | Maturity 30 to 90 Days [Member]      
Derivative [Line Items]      
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement 0    
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member] | Maturity Greater than 90 Days [Member]      
Derivative [Line Items]      
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement $ 0    
v3.19.3.a.u2
Derivatives and Balance Sheet Offsetting Balance Sheet Offsetting (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Balance Sheet Offsetting [Line Items]    
Repurchase agreements, amounts offset in balance sheet $ 0 $ 0
repurchase agreements, net amount presented in statement of financial position 64,437 61,094
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities (64,437) (61,094)
securities sold under agreements to repurchase, amount not offset 0 0
Secured Borrowings, Gross Including Not Subject to Master Netting Arrangement 64,437  
Interest Rate Contracts [Member]    
Balance Sheet Offsetting [Line Items]    
Derivative Assets, Gross Amounts Offset in the Balance Sheets 0 0
Derivative Asset 19,144 7,033
Derivative, Collateral, Obligation to Return Securities 0 0
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 19,144 7,033
Derivative Liability, Gross Amounts Offset in Balance Sheets 0 0
Derivative Liability 19,145 7,033
Derivative, Collateral, Right to Reclaim Securities (19,145) (3,235)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 0 3,798
Interest rate collar [Domain]    
Balance Sheet Offsetting [Line Items]    
Derivative Assets, Gross Amounts Offset in the Balance Sheets 0  
Derivative Asset 14,727  
Derivative, Collateral, Obligation to Return Cash (14,727)  
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 0  
Other Assets [Member] | Interest rate collar [Domain] | Designated as Hedging Instrument [Member]    
Balance Sheet Offsetting [Line Items]    
Derivative Asset, Fair Value, Gross Asset 14,727 0
Other Liabilities [Member] | Interest rate collar [Domain] | Designated as Hedging Instrument [Member]    
Balance Sheet Offsetting [Line Items]    
Derivative Liability, Fair Value, Gross Liability 0 0
Available-for-sale Securities [Member]    
Balance Sheet Offsetting [Line Items]    
Assets Sold under Agreements to Repurchase, Term, Carrying Amounts 25,000  
Assets Sold under Agreements to Repurchase, Carrying Amount $ 64,437 $ 61,094
v3.19.3.a.u2
Employee Benefit Plans (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
years
period
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
shares
Employee Benefit [Line Items]      
Number of Look-back Period Under Employee Stock Purchase Plan | period 2    
Look-back Period Under Employee Stock Purchase Plan 6 months    
Discount On Common Stock Under Employee Stock Purchase Plan, Percent 10.00%    
Stock Issued During Period, Shares, Employee Stock Purchase Plans | shares 57,201 50,750 38,387
Stock Issued During Period, Value, Employee Stock Purchase Plan $ 2,100 $ 2,000 $ 1,500
Shares Available For Purchase Under Employee Stock Purchase Plan | shares 303,156    
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Balance at beginning of year $ 21,287 20,553  
Change in actuarial loss 2,663 (31)  
Benefit expense 1,930 1,701  
Defined Benefit Plan, Benefit Obligation, Benefits Paid 966 936  
Balance at end of year $ 24,914 21,287 20,553
Pension Plan [Member]      
Employee Benefit [Line Items]      
Deferred Compensation Arrangement with Individual, Requisite Service Period 1 month    
Deferred Compensation Arrangement with Individual, Contribution To Plan By Employee, Percent Of Eligible Compensation 75.00%    
Deferred Compensation Arrangement with Individual, Contribution Requirements, Matching Percent 50.00%    
Deferred Compensation Arrangement with Individual, Contributions by Employer $ 3,500 3,300 2,700
Pension Plan [Member] | Minimum [Member]      
Employee Benefit [Line Items]      
Deferred Compensation Arrangement with Individual, Eligible Age | years 18    
Pension Plan [Member] | Maximum [Member]      
Employee Benefit [Line Items]      
Deferred Compensation Arrangement with Individual, Contribution Requirements, Percent Of Each Employee Compensation 3.00%    
Deferred Profit Sharing [Member]      
Employee Benefit [Line Items]      
Deferred Compensation Arrangement with Individual, Requisite Service Period 1 month    
Deferred Compensation Arrangement with Individual, Contribution To Plan By Employee, Percent Of Eligible Compensation 75.00%    
Deferred Compensation Arrangement with Individual, Contribution Requirements, Matching Percent 50.00%    
Deferred Compensation Arrangement with Individual, Contributions by Employer $ 7,300 7,000 5,700
Deferred Profit Sharing [Member] | Minimum [Member]      
Employee Benefit [Line Items]      
Deferred Compensation Arrangement with Individual, Eligible Age | years 18    
Deferred Profit Sharing [Member] | Maximum [Member]      
Employee Benefit [Line Items]      
Deferred Compensation Arrangement with Individual, Contribution Requirements, Percent Of Each Employee Compensation 3.00%    
ESP Plan [Member]      
Employee Benefit [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date 90.00%    
Unit Plans [Member]      
Employee Benefit [Line Items]      
Deferred Compensation Arrangement with Individual, Vesting Period 10    
Deferred Compensation Arrangement with Individual, Benefit Period 10    
Deferred Compensation Arrangement with Individual, Recorded Liability $ 4,000 4,200  
Deferred Compensation Arrangement with Individual, Compensation Expense $ 415 $ 337 $ 452
SERP [Member]      
Employee Benefit [Line Items]      
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate 3.34% 4.30%  
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Normal Retirement Age | years 65    
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Annual Cost Of Living Benefit Adjustment 2.00%    
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]      
2020 $ 1,971    
2021 1,116    
2022 1,135    
2023 1,239    
2024 1,438    
2025 through 2029 8,574    
Total $ 15,473    
v3.19.3.a.u2
Commitments and Contingent Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Commitments to Extend Credit [Member]    
Loss Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 2,670,000 $ 2,620,000
Standby Letters of Credit [Member]    
Loss Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability 25,700 28,300
Commercial Letter of Credit and other off-balance sheet liabilities [Member]    
Loss Contingencies [Line Items]    
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability $ 0 $ 0
v3.19.3.a.u2
Shareholders' Equity (Details) - $ / shares
Jan. 23, 2020
Oct. 24, 2019
Jul. 25, 2019
Apr. 25, 2019
Jan. 24, 2019
Class of Stock [Line Items]          
Declared quarterly cash dividend   $ 0.28 $ 0.28 $ 0.28 $ 0.28
Common Stock, Special Cash Dividends, Per Share, Declared   $ 0 $ 0 $ 0.14 $ 0.14
Subsequent Event [Member]          
Class of Stock [Line Items]          
Declared quarterly cash dividend $ 0.28        
Common Stock, Special Cash Dividends, Per Share, Declared $ 0.22        
v3.19.3.a.u2
Shareholders' Equity Share repurchase (Details) - $ / shares
shares in Millions
 12 Months Ended
Jan. 23, 2020
Oct. 24, 2019
Jul. 25, 2019
Apr. 25, 2019
Jan. 24, 2019
Dec. 31, 2019
Class of Stock [Line Items]            
Common Stock, Dividends, Per Share, Declared   $ 0.28 $ 0.28 $ 0.28 $ 0.28  
Treasury Stock, Shares, Acquired           1.5
Treasury Stock Acquired, Average Cost Per Share           $ 35.00
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased           1.4
Subsequent Event [Member]            
Class of Stock [Line Items]            
Common Stock, Dividends, Per Share, Declared $ 0.28          
v3.19.3.a.u2
Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 40,367 $ (35,305) $ (22,225) $ (18,999)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 77,520 (13,401) 626  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [1] (1,848) 164 230  
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 75,672 (13,237) 856  
Accumulated Net Unrealized Investment Gain (Loss) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 33,038 (33,128) (19,779) (12,704)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 67,802 (13,425) (3,391)  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [1] (1,636) (81) 7  
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent 66,166 (13,506) (3,384)  
Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax (3,974) (2,177) (2,446) (6,295)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax (2,042) 24 4,017  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [1] 245 245 223  
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent (1,797) 269 4,240  
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 11,303 0 0 0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax 11,760 0 0  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [1] (457) 0 0  
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent $ 11,303 $ 0 0  
Accounting Standards Update 2016-01 [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption     0  
Accounting Standards Update 2016-01 [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption     (157)  
Accounting Standards Update 2016-01 [Member] | Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption     0  
Accounting Standards Update 2016-01 [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption     0  
Accounting Standards Update 2016-01 [Member] | Accumulated Other Comprehensive Income [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption     (157)  
Accounting Standards Update 2018-02 [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption       0
Accounting Standards Update 2018-02 [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption     3,691  
Accounting Standards Update 2018-02 [Member] | Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption     391  
Accounting Standards Update 2018-02 [Member] | Accumulated Other Comprehensive Income [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Cumulative Effect of New Accounting Principle in Period of Adoption     $ 4,082 $ 4,082
[1] See following table for details about these reclassifications.
v3.19.3.a.u2
Accumulated Other Comprehensive Income Amounts reclassified from Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                        
Investment securities gains (losses), net                 $ 2,132 $ (89) $ (11)  
Income before income taxes $ 58,032 $ 63,105 $ 63,818 $ 56,656 $ 55,482 $ 57,821 $ 51,748 $ 46,785 241,611 211,836 177,983  
Income Tax Expense (Benefit) (11,903) (12,378) (12,094) (10,785) (10,734) (11,406) (9,999) (6,815) (47,160) (38,954) (65,155)  
Net income $ 46,129 $ 50,727 $ 51,724 $ 45,871 $ 44,748 $ 46,415 $ 41,749 $ 39,970 194,451 172,882 112,828  
Compensation and employee benefits                 212,867 200,199 169,674  
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                        
Investment securities gains (losses), net                 2,132 106 (11)  
Income before income taxes                 2,132 106 (11)  
Income Tax Expense (Benefit)                 (496) (25) 4  
Net income                 1,636 81 (7)  
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                        
Income before income taxes                 (319) (319) (350)  
Income Tax Expense (Benefit)                 74 74 127  
Net income                 (245) (245) (223)  
Compensation and employee benefits                 (319) (319) (350)  
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                        
Income before income taxes                 595 0 0  
Income Tax Expense (Benefit)                 (138) 0 0  
Net income                 457 0 0  
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net                 $ 595 $ 0 0  
Accounting Standards Update 2018-02 [Member]                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                        
Cumulative Effect of New Accounting Principle in Period of Adoption                       $ 0
Accounting Standards Update 2018-02 [Member] | Accumulated Other Comprehensive Income [Member]                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                        
Cumulative Effect of New Accounting Principle in Period of Adoption                     (4,082) $ (4,082)
Accounting Standards Update 2018-02 [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                        
Cumulative Effect of New Accounting Principle in Period of Adoption                     (3,691)  
Accounting Standards Update 2018-02 [Member] | Accumulated Defined Benefit Plans Adjustment [Member]                        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]                        
Cumulative Effect of New Accounting Principle in Period of Adoption                     $ (391)  
v3.19.3.a.u2
Fair Value Accounting and Measurement (Financial Assets And Liabilities Accounted for Fair Value On Recurring Basis) (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Liabilities, Level 1 to Level 2 Transfers, Amount $ 0 $ 0
Securities available for sale 3,746,142,000 3,167,448,000
Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 3,746,142,000 3,167,448,000
Other assets (Interest rate contracts) 19,144,000 7,033,000
Interest Rate Cash Flow Hedge Asset at Fair Value 14,727,000  
Other liabilities (Interest rate contracts) 19,145,000 7,033,000
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 248,000
Other assets (Interest rate contracts) 0 0
Interest Rate Cash Flow Hedge Asset at Fair Value 0  
Other liabilities (Interest rate contracts) 0 0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 3,746,142,000 3,167,200,000
Other assets (Interest rate contracts) 19,144,000 7,033,000
Interest Rate Cash Flow Hedge Asset at Fair Value 14,727,000  
Other liabilities (Interest rate contracts) 19,145,000 7,033,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
Other assets (Interest rate contracts) 0 0
Interest Rate Cash Flow Hedge Asset at Fair Value 0  
Other liabilities (Interest rate contracts) 0 0
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale [1] 2,892,950,000 2,013,355,000
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale [1] 0 0
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale [1] 2,892,950,000 2,013,355,000
U.S. Government Agency and Sponsored Enterprise Mortgage-Back Securities and Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale [1] 0 0
Asset-backed Securities [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale [1] 196,050,000 174,935,000
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale [1] 0 0
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale [1] 196,050,000 174,935,000
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale [1] 0 0
State and Municipal Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 488,802,000 574,323,000
State and Municipal Securities [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 488,802,000 574,323,000
State and Municipal Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
State and Municipal Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 488,802,000 574,323,000
State and Municipal Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
U.S. Government Agency [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 168,340,000 404,587,000
U.S. Government Agency [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 0 0
U.S. Government Agency [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale 168,340,000 404,587,000
U.S. Government Agency [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale $ 0 0
US Government Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale   248,000
US Government Securities [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale   248,000
US Government Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale   248,000
US Government Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale   0
US Government Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities available for sale   $ 0
[1] Beginning in 2019, other asset-backed securities were presented separately in this table. Prior period amounts that were previously reported in U.S. government agency and government-sponsored enterprise mortgage-backed securities and collateralized mortgage obligations have been reclassified to conform to current period presentation.
v3.19.3.a.u2
Fair Value Accounting and Measurement (Financial Assets Accounted For Fair Value On Nonrecurring Basis) (Details) - Fair Value, Nonrecurring [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans $ 10,007 $ 11,555
Fair Value, Option, Changes in Fair Value, Gain (Loss) 7,519 1,821
Assets, Fair Value Disclosure 10,007 11,555
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Assets, Fair Value Disclosure 0 0
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 0 0
Assets, Fair Value Disclosure 0 0
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Impaired loans 10,007 11,555
Assets, Fair Value Disclosure 10,007 11,555
Impaired Loans [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 7,519 $ 1,821
v3.19.3.a.u2
Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) - Fair Value, Nonrecurring [Member]
$ in Thousands
 12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired loans $ 10,007 $ 11,555
Fair Value, Option, Changes in Fair Value, Gain (Loss) (7,519) (1,821)
Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired loans 10,007 11,555
Impaired Loans [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Fair Value, Option, Changes in Fair Value, Gain (Loss) (7,519) (1,821)
Uncollateralized [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired loans   $ 3,161
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired Loans, Measurement Input   0.0034
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired Loans, Measurement Input   0.0034
Uncollateralized [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired Loans, Measurement Input   0.0034
Collateral-Dependent [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired loans $ 10,007 $ 8,394
Collateral-Dependent [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired Loans, Measurement Input 0.0000 0.0000
Collateral-Dependent [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired Loans, Measurement Input 1.0000 0.7004
Collateral-Dependent [Member] | Valuation, Market Approach [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Impaired Loans, Measurement Input 0.4968 0.0702
v3.19.3.a.u2
Fair Value Accounting and Measurement (Carrying Amounts and Estimated Fair Values of Selected Financial Instruments) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Assets    
Interest-earning deposits with banks $ 24,132 $ 17,407
Debt Securities, Available-for-sale 3,746,142 3,167,448
Estimate of Fair Value Measurement [Member]    
Assets    
Cash and due from banks 223,541 260,180
Interest-earning deposits with banks 24,132 17,407
Debt Securities, Available-for-sale 3,746,172 3,167,448
FHLB stock 48,120 25,960
Loans held for sale 17,718 3,849
Loans 8,883,865 8,316,946
Interest rate contracts 19,144 7,033
Interest Rate Cash Flow Hedge Asset at Fair Value 14,727  
Liabilities    
Time Deposits 397,736 407,659
FHLB Advances 952,762 400,085
Repurchase agreements 64,437 61,094
Subordinated Debt Obligations, Fair Value Disclosure 35,491 34,897
Interest rate contracts 19,145 7,033
Reported Value Measurement [Member]    
Assets    
Cash and due from banks 223,541 260,180
Interest-earning deposits with banks 24,132 17,407
Debt Securities, Available-for-sale 3,746,142 3,167,448
FHLB stock 48,120 25,960
Loans held for sale 17,718 3,849
Loans 8,659,497 8,308,142
Interest rate contracts 19,144 7,033
Interest Rate Cash Flow Hedge Asset at Fair Value 14,727  
Liabilities    
Time Deposits 400,070 414,443
FHLB Advances 953,469 399,523
Repurchase agreements 64,437 61,094
Subordinated Debt Obligations, Fair Value Disclosure 35,277 35,462
Interest rate contracts 19,145 7,033
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]    
Assets    
Cash and due from banks 223,541 260,180
Interest-earning deposits with banks 24,132 17,407
Debt Securities, Available-for-sale 0 248
FHLB stock 0 0
Loans held for sale 0 0
Loans 0 0
Interest rate contracts 0 0
Interest Rate Cash Flow Hedge Asset at Fair Value 0  
Liabilities    
Time Deposits 0 0
FHLB Advances 0 0
Repurchase agreements 0 0
Subordinated Debt Obligations, Fair Value Disclosure 0 0
Interest rate contracts 0 0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]    
Assets    
Cash and due from banks 0 0
Interest-earning deposits with banks 0 0
Debt Securities, Available-for-sale 3,746,172 3,167,200
FHLB stock 48,120 25,960
Loans held for sale 17,718 3,849
Loans 0 0
Interest rate contracts 19,144 7,033
Interest Rate Cash Flow Hedge Asset at Fair Value 14,727  
Liabilities    
Time Deposits 397,736 407,659
FHLB Advances 952,762 400,085
Repurchase agreements 64,437 61,094
Subordinated Debt Obligations, Fair Value Disclosure 35,491 34,897
Interest rate contracts 19,145 7,033
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]    
Assets    
Cash and due from banks 0 0
Interest-earning deposits with banks 0 0
Debt Securities, Available-for-sale 0 0
FHLB stock 0 0
Loans held for sale 0 0
Loans 8,883,865 8,316,946
Interest rate contracts 0 0
Interest Rate Cash Flow Hedge Asset at Fair Value 0  
Liabilities    
Time Deposits 0 0
FHLB Advances 0 0
Repurchase agreements 0 0
Subordinated Debt Obligations, Fair Value Disclosure 0 0
Interest rate contracts $ 0 $ 0
v3.19.3.a.u2
Earnings Per Common Share (Schedule of Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]                      
Basic earnings allocated to common shareholders                 $ 192,921 $ 170,990 $ 111,324
Net income $ 46,129 $ 50,727 $ 51,724 $ 45,871 $ 44,748 $ 46,415 $ 41,749 $ 39,970 194,451 172,882 112,828
Earnings allocated to participating securities - preferred shares                 0 0 3
Earnings allocated to participating securities - nonvested restricted shares                 $ 1,530 $ 1,892 $ 1,501
Weighted average common shares outstanding                 71,999 72,385 59,882
Basic earnings per common share $ 0.64 [1] $ 0.70 [1] $ 0.71 [1] $ 0.63 [1] $ 0.61 [1] $ 0.63 [1] $ 0.57 [1] $ 0.55 [1] $ 2.68 [1] $ 2.36 [1] $ 1.86
Earnings allocated to common shareholders, Diluted                 $ 192,921 $ 170,990 $ 111,324
Weighted average number of common shares outstanding                 71,999 72,385 59,882
Dilutive effect of equity awards and warrants                 33 5 6
Weighted average diluted common shares outstanding                 72,032 72,390 59,888
Diluted earnings per common share $ 0.64 [1] $ 0.70 [1] $ 0.71 [1] $ 0.63 [1] $ 0.61 [1] $ 0.63 [1] $ 0.57 [1] $ 0.55 [1] $ 2.68 [1] $ 2.36 [1] $ 1.86
Potentially dilutive share options that were not included in the computation of diluted EPS because to do so would be anti-dilutive.                 8 4 13
[1] Due to averaging of shares, quarterly EPS may not add up to the totals reported for the full year.
v3.19.3.a.u2
Share-Based Payments (Share Awards) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Payment Arrangement [Abstract]        
Share-based Payment Arrangement, Expense $ 9.3 $ 8.4 $ 7.7  
Share-based compensation, number authorized (in shares) 3,050,000      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 889,017 814,140 805,706 818,755
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 36.96 $ 36.43 $ 32.23 $ 27.19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 405,516 306,592 337,384  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 35.08 $ 41.47 $ 38.51  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (268,253) (237,146) (253,509)  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 32.50 $ 28.78 $ 25.67  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (62,386) (61,012) (96,924)  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value $ 37.12 $ 35.92 $ 28.97  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 23.1      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 2 years 8 months 12 days      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value $ 8.7 $ 6.7 $ 6.5  
v3.19.3.a.u2
Share-Based Payments (Share Options) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ 9,300 $ 8,400 $ 7,700
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Balance at beginning of year (in shares) 5,514    
Granted (in shares) 0 0 0
Expired (in shares) (1,187)    
Exercised (in shares) (4,327)    
Balance at end of year (in shares) 0 5,514  
Weighted Average Exercise Price at beginning of year $ 9.91    
Weighted Average Exercise Price, Expired 9.91    
Weighted Average Exercise Price, Exercised $ 9.91    
Weighted Average Exercise Price at end of year   $ 9.91  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value $ 108 $ 29 $ 67
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract]      
Stock-based compensation expense $ 9,271 $ 8,354 $ 7,745
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 0 0 0
Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share Based Compensation Arrangement By Share Based Payment Award, Exercisable Period 5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Share Based Compensation Arrangement By Share Based Payment Award, Maximum Term 10 years    
v3.19.3.a.u2
Income Tax (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Contingency [Line Items]                      
Current Federal Tax Expense (Benefit)                 $ 40,471 $ 33,400 $ 39,708
Federal operating loss carryforwards, set to begin to expire in 2024 $ 15,800               15,800    
Idaho state operating loss carryforwards, set to begin to expire in 2024 14,300               14,300    
Interest and penalties on unrecognized tax benefits                 0 0  
State operating loss carryforwards, set to begin to expire in 2024 121               121    
Unrecognized tax position 0       $ 0       0 0  
Current State and Local Tax Expense (Benefit)                 6,359 5,446 3,016
Current tax (benefit) expense                 46,830 38,846 42,724
Deferred Federal Income Tax Expense (Benefit)                 60 (291) 21,524
Deferred State and Local Income Tax Expense (Benefit)                 270 399 907
Deferred tax expense (benefit)                 330 108 22,431
Income tax provision 11,903 $ 12,378 $ 12,094 $ 10,785 10,734 $ 11,406 $ 9,999 $ 6,815 47,160 38,954 65,155
Deferred tax assets:                      
Allowance for loan and lease losses 20,489       20,578       20,489 20,578  
Deferred Tax Assets, Leasing Arrangements 14,776       0       14,776 0  
Supplemental executive retirement plan 11,079       9,501       11,079 9,501  
Stock option and restricted stock 2,016       1,850       2,016 1,850  
OREO 0       288       0 288  
Nonaccrual interest 112       446       112 446  
Deferred Tax Assets, Unrealized Losses on Available-for-Sale Securities, Gross 0       10,129       0 10,129  
Deferred Tax Assets, Operating Loss Carryforwards 4,136       5,356       4,136 5,356  
Other (245)       (733)       (245) (733)  
Total deferred tax assets 52,853       48,881       52,853 48,881  
Deferred tax liabilities:                      
Asset purchase tax basis difference (7,888)       (7,229)       (7,888) (7,229)  
Deferred Tax Liabilities, Leasing Arrangements (13,415)       0       (13,415) 0  
FHLB stock dividends (789)       (790)       (789) (790)  
Deferred loan fees (4,097)       (4,399)       (4,097) (4,399)  
deferred tax liabilities, unrealized gains on available-for-sale securities 10,091       0       10,091 0  
Deferred tax liabilities, purchase accounting (8,946)       (9,245)       (8,946) (9,245)  
Depreciation (3,152)       (2,609)       (3,152) (2,609)  
Deferred Tax Liabilities, Derivatives (3,452)       0       (3,452) 0  
Deferred Tax Liabilities, Other (100)       (195)       (100) (195)  
Total deferred tax liabilities 51,930       24,467       51,930 24,467  
Net deferred tax (liability) asset 923       24,414       923 24,414  
Reconciliation of effective income tax rate with federal statutory tax rate                      
Income tax based on statutory rate                 $ 50,738 $ 44,485 $ 62,262
Income tax based on statutory rate, percent                 21.00% 21.00% 35.00%
Federal income tax rate 2018                 21.00%    
Tax exempt instrument                 $ (6,771) $ (6,423) $ (8,485)
Tax exempt instrument, percent                 (3.00%) (3.00%) (5.00%)
Life insurance proceeds                 $ (1,963) $ (1,261) $ (3,351)
Life insurance proceeds, percent                 (1.00%) (1.00%) (2.00%)
effective income tax rate reconciliation, nondeductible expense, business combination, amount                 $ 0 $ 0 $ 825
effective income tax rate reconciliation, nondeductible expense, business combination, percent                 0.00% 0.00% 1.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount                 $ 0 $ 0 $ 12,210
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent                 0.00% 0.00% 7.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount                 $ 5,134 $ 4,931 $ 2,550
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent                 2.00% 2.00% 1.00%
Other, net                 $ 22 $ (2,778) $ (856)
Other, net, percent                 1.00% (1.00%) 0.00%
Income tax provision $ 11,903 $ 12,378 $ 12,094 $ 10,785 $ 10,734 $ 11,406 $ 9,999 $ 6,815 $ 47,160 $ 38,954 $ 65,155
Income tax provision (benefit), percent                 20.00% 18.00% 37.00%
v3.19.3.a.u2
Regulatory Capital Requirements (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital Conservation Buffer 5.60%  
Common Equity Tier One Capital $ 1,317,202 $ 1,253,394
Common Equity Tier 1 Capital to Risk Weighted Assets 12.45% 12.74%
Common Equity Tier One Capital Required for Capital Adequacy $ 476,260 $ 442,717
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.50% 4.50%
Common Equity Tier One Capital Required for Capital Adequacy plus capital conservation buffer phase-in   $ 627,182
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in   6.38%
Common Equity Tier One Capital Required for Capital Adequacy - minimum required plus fully phased in capital conservation buffer $ 740,849 $ 688,670
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in 7.00% 7.00%
Total Capital, Actual Amount $ 1,439,877 $ 1,376,555
Total Capital (to risk-weighted assets), Ratio 13.60% 13.99%
Total Capital For Capital Adequacy Purposes, Amount $ 846,685 $ 787,052
Total Capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio 8.00% 8.00%
Capital Required for Capital Adequacy plus capital conservation buffer phase-in   $ 971,517
Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in   9.88%
Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in $ 1,111,274 $ 1,033,006
Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in 10.50% 10.50%
Tier 1 Capital, Actual Amount $ 1,317,202 $ 1,253,394
Tier 1 Capital (to risk-weighted assets), Ratio 12.45% 12.74%
Tier 1 Capital For Capital Adequacy Purposes, Amount $ 635,014 $ 590,289
Tier 1 Capital (to risk-weighted assets) For Capital Adequacy Purposes, Ratio 6.00% 6.00%
Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer phase-in   $ 774,754
Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in   7.88%
Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in $ 899,603 $ 836,243
Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in 8.50% 8.50%
Tier 1 Capital, Actual Amount $ 1,317,202 $ 1,253,394
Tier 1 Capital (to average assets), Ratio 10.17% 10.24%
Tier 1 Capital For Capital Adequacy Purposes, Amount $ 517,938 $ 489,399
Tier 1 Capital (to average assets) For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Banking Subsidiaries [Member]    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Capital Conservation Buffer 5.29%  
Common Equity Tier One Capital $ 1,318,044 $ 1,274,317
Common Equity Tier 1 Capital to Risk Weighted Assets 12.46% 12.96%
Common Equity Tier One Capital Required for Capital Adequacy $ 475,913 $ 442,552
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets 4.50% 4.50%
Common Equity Tier One Capital Required for Capital Adequacy plus capital conservation buffer phase-in   $ 626,948
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in   6.38%
Common Equity Tier One Capital Required for Capital Adequacy - minimum required plus fully phased in capital conservation buffer $ 740,310 $ 688,414
Common Equity Tier 1 Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in 7.00% 7.00%
Common Equity Tier One Risk Based Capital Required to be Well Capitalized $ 687,430 $ 639,241
Common Equity Tier 1 Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets 6.50% 6.50%
Total Capital, Actual Amount $ 1,405,422 $ 1,362,016
Total Capital (to risk-weighted assets), Ratio 13.29% 13.85%
Total Capital For Capital Adequacy Purposes, Amount $ 846,068 $ 786,759
Total Capital (to risk-weighted assets), For Capital Adequacy Purposes, Ratio 8.00% 8.00%
Capital Required for Capital Adequacy plus capital conservation buffer phase-in   $ 971,155
Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in   9.88%
Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in $ 1,110,464 $ 1,032,621
Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in 10.50% 10.50%
Total Capital To Be Well Capitalized Under Prompt Corrective Action Provision, Amount $ 1,057,585 $ 983,448
Total Capital (to risk-weighted assets) To Be Well Capitalized Under Prompt Corrective Action Provision 10.00% 10.00%
Tier 1 Capital, Actual Amount $ 1,318,044 $ 1,274,317
Tier 1 Capital (to risk-weighted assets), Ratio 12.46% 12.96%
Tier 1 Capital For Capital Adequacy Purposes, Amount $ 634,551 $ 590,069
Tier 1 Capital (to risk-weighted assets) For Capital Adequacy Purposes, Ratio 6.00% 6.00%
Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer phase-in   $ 774,465
Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer phase-in   7.88%
Tier One Risk Based Capital Required for Capital Adequacy plus capital conservation buffer fully phased-in $ 898,947 $ 835,931
Tier One Based Capital Required for Capital Adequacy to Risk Weighted Assets plus capital conservation buffer fully phased-in 8.50% 8.50%
Tier 1 Capital To Be Well Capitalized Under Prompt Corrective Action Provision, Amount $ 846,068 $ 786,759
Tier 1 Capital (to risk-weighted assets) To Be Well Capitalized Under Prompt Corrective Action Provision, Ratio 8.00% 8.00%
Tier 1 Capital, Actual Amount $ 1,318,044 $ 1,274,317
Tier 1 Capital (to average assets), Ratio 10.22% 10.42%
Tier 1 Capital For Capital Adequacy Purposes, Amount $ 515,797 $ 489,254
Tier 1 Capital (to average assets) For Capital Adequacy Purposes, Ratio 4.00% 4.00%
Tier 1 Capital To Be Well Capitalized Under Prompt Corrective Provision, Amount $ 644,746 $ 611,567
Tier 1 Capital (to average assets) To Be Well Capitalized Under Prompt Corrective Provision, Ratio 5.00% 5.00%
v3.19.3.a.u2
Parent Company Financial Information (Condensed Balance Sheets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Assets        
Cash and due from banks $ 223,541 $ 260,180    
Interest-earning deposits 24,132 17,407    
Total cash and cash equivalents 247,673 277,587 $ 342,533 $ 224,238
Goodwill 765,842 765,842 765,842 382,762
Other assets 346,275 280,250    
Total Assets 14,079,524 13,095,145    
Liabilities and Shareholders’ Equity        
Subordinated Debt 35,277 35,462    
Other liabilities 181,671 107,291    
Total liabilities 11,919,562 11,061,496    
Shareholders’ equity 2,159,962 2,033,649 1,949,922 1,251,012
Total liabilities and shareholders' equity 14,079,524 13,095,145    
Parent Company [Member]        
Assets        
Cash and due from banks 6,088 945    
Interest-earning deposits 21,717 7,226    
Total cash and cash equivalents 27,805 8,171 $ 9,298 $ 2,447
Goodwill 4,729 4,729    
Other assets 1,675 1,595    
Total Assets 2,195,919 2,069,662    
Liabilities and Shareholders’ Equity        
Subordinated Debt 35,277 35,462    
Other liabilities 680 551    
Total liabilities 35,957 36,013    
Shareholders’ equity 2,159,962 2,033,649    
Total liabilities and shareholders' equity 2,195,919 2,069,662    
Banking Subsidiaries [Member] | Parent Company [Member]        
Assets        
Investment in subsidiaries 2,156,039 2,049,855    
Other Subsidiaries [Member] | Parent Company [Member]        
Assets        
Investment in subsidiaries $ 5,671 $ 5,312    
v3.19.3.a.u2
Parent Company Financial Information (Condensed Statements of Income) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income                      
Deposits in banks                 $ 1,312 $ 702 $ 813
Expense                      
Compensation and employee benefits                 212,867 200,199 169,674
Subordinated debentures                 1,871 1,871 304
Other borrowings                 669 504 575
Other expense [1]                 34,152 37,024 34,608
Income before income tax benefit and equity in undistributed (excess distributed) earnings of subsidiaries $ 58,032 $ 63,105 $ 63,818 $ 56,656 $ 55,482 $ 57,821 $ 51,748 $ 46,785 241,611 211,836 177,983
Provision for income taxes 11,903 12,378 12,094 10,785 10,734 11,406 9,999 6,815 47,160 38,954 65,155
Net income $ 46,129 $ 50,727 $ 51,724 $ 45,871 $ 44,748 $ 46,415 $ 41,749 $ 39,970 194,451 172,882 112,828
Parent Company [Member]                      
Income                      
Dividend from banking subsidiaries                 168,000 85,250 66,800
Deposits in banks                 100 12 2
Other income                 68 56 8
Total Income                 168,168 85,318 66,810
Expense                      
Compensation and employee benefits                 791 978 732
Subordinated debentures                 1,871 1,871 304
Other borrowings                 0 4 60
Other expense                 2,111 2,058 3,090
Total Expenses                 4,773 4,911 4,186
Income before income tax benefit and equity in undistributed (excess distributed) earnings of subsidiaries                 163,395 80,407 62,624
Provision for income taxes                 (967) (1,017) (548)
Income before equity in undistributed earnings of subsidiaries                 164,362 81,424 63,172
Equity in undistributed earnings of subsidiaries                 30,089 91,458 49,656
Net income                 $ 194,451 $ 172,882 $ 112,828
[1] Beginning January 1, 2019, B&O taxes are reported separately from other taxes, licenses and fees, which are now reported under “other noninterest expense.” Prior periods have been reclassified to conform to current period presentation.
v3.19.3.a.u2
Parent Company Financial Information (Condensed Statements of Cash Flows) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]                      
Stock Issued                 $ 0 $ 0 $ 636,385
Operating Activities                      
Net income $ 46,129 $ 50,727 $ 51,724 $ 45,871 $ 44,748 $ 46,415 $ 41,749 $ 39,970 194,451 172,882 112,828
Adjustments to reconcile net income to net cash provided by operating activities:                      
Stock-based compensation expense                 9,271 8,354 7,745
Net cash provided by operating activities                 204,747 237,201 128,525
Investing Activities                      
Net cash paid in business combinations                 0 0 80,472
Net cash provided by investing activities                 (865,450) (506,083) (199,489)
Financing Activities                      
Cash dividends paid                 (101,911) (83,440) (51,308)
Repayments of Junior Subordinated Debt                 0 8,248 6,186
Payments for cash settlement of acquired equity awards                 0 0 (7,345)
Purchase and retirement of common stock                 2,792 2,677 2,299
Purchase of treasury stock                 (50,834) 0 0
Proceeds from exercise of stock options                 2,025 1,857 1,980
Net cash provided by financing activities                 630,789 203,936 189,259
Increase (decrease) in cash and cash equivalents                 (29,914) (64,946) 118,295
Cash and cash equivalents at beginning of period       277,587       342,533 277,587 342,533 224,238
Cash and cash equivalents at end of period 247,673       277,587       247,673 277,587 342,533
Parent Company [Member]                      
Condensed Financial Statements, Captions [Line Items]                      
Stock Issued                 0 0 636,385
Operating Activities                      
Net income                 194,451 172,882 112,828
Adjustments to reconcile net income to net cash provided by operating activities:                      
Equity in undistributed earnings of subsidiaries                 (30,089) (91,458) (49,656)
Stock-based compensation expense                 9,271 8,354 7,745
Net changes in other assets and liabilities                 (133) 1,622 1,672
Net cash provided by operating activities                 173,500 91,400 72,589
Investing Activities                      
Net cash paid in business combinations                 0 0 (580)
Net cash provided by investing activities                 0 0 (580)
Financing Activities                      
Cash dividends paid                 (102,265) (83,459) (51,308)
Repayments of Junior Subordinated Debt                 0 8,248 6,186
Payments for cash settlement of acquired equity awards                 0 0 7,345
Purchase and retirement of common stock                 2,792 2,677 2,299
Purchase of treasury stock                 (50,834) 0 0
Proceeds from exercise of stock options                 2,025 1,857 1,980
Net cash provided by financing activities                 (153,866) (92,527) (65,158)
Increase (decrease) in cash and cash equivalents                 19,634 (1,127) 6,851
Cash and cash equivalents at beginning of period       $ 8,171       $ 9,298 8,171 9,298 2,447
Cash and cash equivalents at end of period $ 27,805       $ 8,171       $ 27,805 $ 8,171 $ 9,298
v3.19.3.a.u2
Summary Of Quarterly Financial Information (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]                      
Total interest income $ 133,109 $ 132,533 $ 135,422 $ 128,888 $ 129,801 $ 127,575 $ 120,549 $ 119,144 $ 529,952 $ 497,069 $ 374,746
Total interest expense 8,292 10,083 10,306 7,866 5,913 4,779 3,875 3,663 36,547 18,230 6,757
Net Interest Income 124,817 122,450 125,116 121,022 123,888 122,796 116,674 115,481 493,405 478,839 367,989
Provision for loan and lease losses 1,614 299 218 1,362 1,789 3,153 3,975 5,852 3,493 14,769 8,631
Noninterest income 21,807 28,030 25,648 21,696 20,402 21,019 23,692 23,143 97,181 88,256 109,642
Noninterest expense 86,978 87,076 86,728 84,700 87,019 82,841 84,643 85,987 345,482 340,490 291,017
Income before income taxes 58,032 63,105 63,818 56,656 55,482 57,821 51,748 46,785 241,611 211,836 177,983
Provision for income taxes 11,903 12,378 12,094 10,785 10,734 11,406 9,999 6,815 47,160 38,954 65,155
Net income $ 46,129 $ 50,727 $ 51,724 $ 45,871 $ 44,748 $ 46,415 $ 41,749 $ 39,970 $ 194,451 $ 172,882 $ 112,828
Per Common Share                      
Earnings (basic) $ 0.64 [1] $ 0.70 [1] $ 0.71 [1] $ 0.63 [1] $ 0.61 [1] $ 0.63 [1] $ 0.57 [1] $ 0.55 [1] $ 2.68 [1] $ 2.36 [1] $ 1.86
Earnings (diluted) $ 0.64 [1] $ 0.70 [1] $ 0.71 [1] $ 0.63 [1] $ 0.61 [1] $ 0.63 [1] $ 0.57 [1] $ 0.55 [1] $ 2.68 [1] $ 2.36 [1] $ 1.86
[1] Due to averaging of shares, quarterly EPS may not add up to the totals reported for the full year.
v3.19.3.a.u2
Revenue from Contracts with Customers (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disaggregation of Revenue [Line Items]                      
Deposit account and treasury management fees                 $ 35,695 $ 36,072 $ 30,381
Card revenue                 15,198 19,719 25,627
Financial services and trust revenue                 12,799 12,135 11,478
Revenue from contracts with customers                 63,692 67,926  
Noninterest income, excluding revenue from contracts with customers                 33,489 20,330  
Noninterest income $ 21,807 $ 28,030 $ 25,648 $ 21,696 $ 20,402 $ 21,019 $ 23,692 $ 23,143 $ 97,181 $ 88,256 $ 109,642