Cover - shares	9 Months Ended
Cover - shares	Sep. 30, 2021	Oct. 29, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-37875
Entity Registrant Name	FB FINANCIAL CORPORATION
Entity Incorporation, State or Country Code	TN
Entity Tax Identification Number	62-1216058
Entity Address, Address Line One	211 Commerce Street
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Nashville
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37201
City Area Code	615
Local Phone Number	564-1212
Title of 12(b) Security	Common Stock, Par Value $1.00 Per Share
Trading Symbol	FBK
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Reporting Company	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		47,711,799
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001649749
Current Fiscal Year End Date	--12-31

Consolidated balance sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Cash and due from banks	$ 100,568	$ 110,991
Federal funds sold and reverse repurchase agreements	145,333	121,153
Interest-bearing deposits in financial institutions	1,078,663	1,085,754
Cash and cash equivalents	1,324,564	1,317,898
Investments:
Available-for-sale debt securities, at fair value	1,572,558	1,172,400
Equity securities, at fair value	4,779	4,591
Federal Home Loan Bank stock, at cost	27,601	31,232
Loans held for sale, at fair value	855,706	899,173
Loans	7,294,674	7,082,959
Less: allowance for credit losses	139,446	170,389
Net loans	7,155,228	6,912,570
Premises and equipment, net	144,737	145,115
Other real estate owned, net	10,015	12,111
Operating lease right-of-use assets	44,006	49,537
Interest receivable	41,393	43,603
Mortgage servicing rights, at fair value	110,591	79,997
Goodwill	242,561	242,561
Core deposit and other intangibles, net	18,248	22,426
Other assets	258,303	274,116
Total assets	11,810,290	11,207,330
Deposits
Noninterest-bearing	2,609,569	2,274,103
Interest-bearing checking	2,850,795	2,491,765
Money market and savings	3,424,065	3,254,915
Customer time deposits	1,159,472	1,375,695
Brokered and internet time deposits	28,017	61,559
Total deposits	10,071,918	9,458,037
Borrowings	172,710	238,324
Operating lease liabilities	48,875	55,187
Accrued expenses and other liabilities	115,781	164,400
Total liabilities	10,409,284	9,915,948
Commitments and contingencies (Note 9)
SHAREHOLDERS' EQUITY
Common stock, $1 par value per share; 75,000,000 shares authorized; 47,707,634 and 47,220,743 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	47,708	47,222
Additional paid-in capital	897,428	898,847
Retained earnings	443,140	317,625
Accumulated other comprehensive income, net	12,637	27,595
Total FB Financial Corporation common shareholders' equity	1,400,913	1,291,289
Noncontrolling interest	93	93
Total equity	1,401,006	1,291,382
Total liabilities and shareholders' equity	$ 11,810,290	$ 11,207,330

Consolidated balance sheets (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	47,707,634	47,220,743
Common stock, shares outstanding (in shares)	47,707,634	47,220,743

Consolidated statements of income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Consolidated statements of income - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest income:
Interest and fees on loans	$ 89,993	$ 76,504	$ 269,266	$ 201,350
Interest on securities
Taxable	3,989	2,286	10,652	7,961
Tax-exempt	1,883	1,933	5,772	4,956
Other	800	404	2,089	2,141
Total interest income	96,665	81,127	287,779	216,408
Interest expense:
Deposits	6,596	10,573	24,341	32,050
Borrowings	1,593	1,726	5,823	3,944
Total interest expense	8,189	12,299	30,164	35,994
Net interest income	88,476	68,828	257,615	180,414
Provision for credit losses	(2,832)	45,834	(27,349)	97,837
Provision for credit losses on unfunded commitments	301	9,567	(2,875)	13,050
Net interest income after provisions for credit losses	91,007	13,427	287,839	69,527
Noninterest income:
Gain from securities, net	51	583	278	618
Gain (loss) on sales or write-downs of other real estate owned	2,005	(1,505)	2,478	(1,368)
Gain (loss) from other assets	177	226	162	(156)
Other income	1,398	5,133	6,578	10,395
Total noninterest income	59,006	97,026	175,036	221,217
Noninterest expenses:
Salaries, commissions and employee benefits	62,818	67,676	189,756	166,556
Occupancy and equipment expense	5,979	4,892	17,184	13,166
Legal and professional fees	2,177	1,917	6,701	5,427
Data processing	2,595	2,994	7,456	8,229
Merger costs	0	20,730	0	25,366
Amortization of core deposit and other intangibles	1,344	1,417	4,178	3,825
Advertising	4,200	2,256	10,012	7,236
Other expense	15,894	16,210	47,378	37,425
Total noninterest expense	95,007	118,092	282,665	267,230
Income (loss) before income taxes	55,006	(7,639)	180,210	23,514
Income tax expense (benefit)	9,716	(2,040)	38,744	5,495
Net income (loss) applicable to FB Financial Corporation and noncontrolling interest	45,290	(5,599)	141,466	18,019
Net income applicable to noncontrolling interest	0	0	8	0
Net income (loss) applicable to FB Financial Corporation	$ 45,290	$ (5,599)	$ 141,458	$ 18,019
Earnings (loss) per common share
Basic (in dollars per share)	$ 0.96	$ (0.14)	$ 2.99	$ 0.52
Diluted (in dollars per share)	$ 0.94	$ (0.14)	$ 2.95	$ 0.52
Mortgage banking income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, ATM and interchange fees, investment services and trust income	$ 45,384	$ 84,686	$ 136,215	$ 189,599
Service charges on deposit accounts
Noninterest income:
Mortgage banking income, service charges on deposit accounts, ATM and interchange fees, investment services and trust income	2,612	2,162	7,217	6,583
ATM and interchange fees
Noninterest income:
Mortgage banking income, service charges on deposit accounts, ATM and interchange fees, investment services and trust income	4,868	3,913	14,590	10,653
Investment services and trust income
Noninterest income:
Mortgage banking income, service charges on deposit accounts, ATM and interchange fees, investment services and trust income	$ 2,511	$ 1,828	$ 7,518	$ 4,893

Consolidated statements of comprehensive income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 45,290	$ (5,599)	$ 141,466	$ 18,019
Other comprehensive income (loss), net of tax:
Net change in unrealized gain in available-for-sale securities, net of tax (benefits) expenses of $(2,054), $521, $(4,708) and $5,225	(5,818)	1,788	(15,380)	15,091
Reclassification adjustment for gain on sale of securities included in net income, net of tax expenses of $19, $137, $23 and $137	(56)	(387)	(67)	(387)
Net change in unrealized loss in hedging activities, net of tax expenses (benefits) of $38, $40, $173 and $(403)	106	112	489	(1,145)
Reclassification adjustment for gain on hedging activities, net of tax expenses of $0, $41, $0 and $145	0	(115)	0	(410)
Total other comprehensive (loss) income, net of tax	(5,768)	1,398	(14,958)	13,149
Comprehensive income (loss)	39,522	(4,201)	126,508	31,168
Comprehensive income applicable to noncontrolling interests	0	0	8	0
Comprehensive income (loss) applicable to FB Financial Corporation	$ 39,522	$ (4,201)	$ 126,500	$ 31,168

Consolidated statements of comprehensive income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net tax (benefits) expenses on net change in unrealized gain (loss) on available-for-sale securities	$ (2,054)	$ 521	$ (4,708)	$ 5,225
Net tax expenses on reclassification adjustment for gain on sale of securities included in net income	19	137	23	137
Net tax expenses (benefits) recognized on net change in unrealized gain (loss) on hedging activities	38	40	173	(403)
Net tax expenses on reclassification adjustment on gain on hedging activities	$ 0	$ 41	$ 0	$ 145

Consolidated statements of changes in shareholders' equity - USD ($) $ in Thousands	Total	FNB Financial Corp.	Franklin Financial Network, Inc.	Cumulative effect adjustment to adopt ASC 326	Adjusted balance	Common stock	Common stock FNB Financial Corp.	Common stock Franklin Financial Network, Inc.	Common stock Adjusted balance	Additional paid-in capital	Additional paid-in capital FNB Financial Corp.	Additional paid-in capital Franklin Financial Network, Inc.	Additional paid-in capital Adjusted balance	Retained earnings	Retained earnings Cumulative effect adjustment to adopt ASC 326	Retained earnings Adjusted balance	Accumulated other comprehensive income, net	Accumulated other comprehensive income, net Adjusted balance	Total common shareholders' equity	Total common shareholders' equity FNB Financial Corp.	Total common shareholders' equity Franklin Financial Network, Inc.	Total common shareholders' equity Cumulative effect adjustment to adopt ASC 326	Total common shareholders' equity Adjusted balance	Noncontrolling interests	Noncontrolling interests Franklin Financial Network, Inc.	Noncontrolling interests Adjusted balance
Beginning balance at Dec. 31, 2019	$ 762,329			$ (25,018)	$ 737,311	$ 31,034			$ 31,034	$ 425,633			$ 425,633	$ 293,524	$ (25,018)	$ 268,506	$ 12,138	$ 12,138	$ 762,329			$ (25,018)	$ 737,311	$ 0		$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to FB Financial Corporation and noncontrolling interest	18,019													18,019					18,019
Other comprehensive income, net of taxes	13,149																13,149		13,149
Common stock issued in connection with acquisitions, net of registration costs (See Note 2)		$ 34,847	$ 444,966				$ 955	$ 15,058			$ 33,892	$ 429,815								$ 34,847	$ 444,873				$ 93
Stock based compensation expense	7,253					17				7,236									7,253
Restricted stock units vested and distributed, net of shares withheld	(1,268)					98				(1,366)									(1,268)
Shares issued under employee stock purchase program	978					30				948									978
Dividends declared	(10,164)													(10,164)					(10,164)
Ending balance at Sep. 30, 2020	1,245,091					47,192				896,158				276,361			25,287		1,244,998					93
Beginning balance at Jun. 30, 2020	805,216					32,101				462,930				286,296			23,889		805,216					0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to FB Financial Corporation and noncontrolling interest	(5,599)													(5,599)					(5,599)
Other comprehensive income, net of taxes	1,398																1,398		1,398
Common stock issued in connection with acquisitions, net of registration costs (See Note 2)	444,966					15,058				429,815									444,873					93
Stock based compensation expense	3,020					6				3,014									3,020
Restricted stock units vested and distributed, net of shares withheld	(106)					9				(115)									(106)
Shares issued under employee stock purchase program	532					18				514									532
Dividends declared	(4,336)													(4,336)					(4,336)
Ending balance at Sep. 30, 2020	1,245,091					47,192				896,158				276,361			25,287		1,244,998					93
Beginning balance at Dec. 31, 2020	1,291,382					47,222				898,847				317,625			27,595		1,291,289					93
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to FB Financial Corporation and noncontrolling interest	141,466													141,458					141,458					8
Other comprehensive income, net of taxes	(14,958)																(14,958)		(14,958)
Repurchase of common stock	(436)					(11)				(425)									(436)
Stock based compensation expense	8,065					6				8,059									8,065
Restricted stock units vested and distributed, net of shares withheld	(10,042)					454				(10,496)									(10,042)
Shares issued under employee stock purchase program	1,480					37				1,443									1,480
Dividends declared	(15,943)													(15,943)					(15,943)
Noncontrolling interest distribution	(8)																							(8)
Ending balance at Sep. 30, 2021	1,401,006					47,708				897,428				443,140			12,637		1,400,913					93
Beginning balance at Jun. 30, 2021	1,371,814					47,361				902,782				403,173			18,405		1,371,721					93
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to FB Financial Corporation and noncontrolling interest	45,290													45,290					45,290
Other comprehensive income, net of taxes	(5,768)																(5,768)		(5,768)
Repurchase of common stock	(436)					(11)				(425)									(436)
Stock based compensation expense	2,884					1				2,883									2,884
Restricted stock units vested and distributed, net of shares withheld	(8,102)					342				(8,444)									(8,102)
Shares issued under employee stock purchase program	647					15				632									647
Dividends declared	(5,323)													(5,323)					(5,323)
Noncontrolling interest distribution	0
Ending balance at Sep. 30, 2021	$ 1,401,006					$ 47,708				$ 897,428				$ 443,140			$ 12,637		$ 1,400,913					$ 93

Consolidated statements of changes in shareholders' equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared (USD per share)	$ 0.11	$ 0.09	$ 0.33	$ 0.27

Consolidated statements of cash flows - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
Consolidated statements of cash flows - USD ($)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 45,290,000	$ (5,599,000)	$ 141,466,000	$ 18,019,000
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization of fixed assets			6,288,000	4,924,000
Amortization of core deposit and other intangibles			4,178,000	3,825,000
Capitalization of mortgage servicing rights			(31,382,000)	(33,415,000)
Net change in fair value of mortgage servicing rights	239,000	7,175,000	788,000	42,251,000
Stock-based compensation expense			8,065,000	7,253,000
Provision for credit losses	(2,832,000)	45,834,000	(27,349,000)	97,837,000
Provision for credit losses on unfunded commitments	301,000	9,567,000	(2,875,000)	13,050,000
Provision for mortgage loan repurchases	0	901,000	(266,000)	2,128,000
Amortization (accretion) of premiums and discounts on acquired loans, net			127,000	(3,080,000)
Accretion of discounts and amortization of premiums on securities, net			6,521,000	4,431,000
Gain from securities, net	(51,000)	(583,000)	(278,000)	(618,000)
Originations of loans held for sale			(4,926,390,000)	(4,739,497,000)
Repurchases of loans held for sale			(384,000)	0
Proceeds from sale of loans held for sale			4,939,323,000	4,690,135,000
Gain on sale and change in fair value of loans held for sale			(126,983,000)	(202,336,000)
Net (gain) loss or write-downs of other real estate owned	(2,005,000)	1,505,000	(2,478,000)	1,368,000
(Gain) loss on other assets	(177,000)	(226,000)	(162,000)	156,000
Provision for deferred income taxes	7,366,000	(15,163,000)	20,904,000	(31,543,000)
Changes in:
Operating leases			(781,000)	1,309,000
Other assets and interest receivable			(2,508,000)	(77,566,000)
Accrued expenses and other liabilities			(46,867,000)	59,420,000
Net cash used in operating activities			(41,043,000)	(141,949,000)
Activity in available-for-sale securities:
Sales	8,855,000	28,257,000	8,855,000	28,257,000
Maturities, prepayments and calls	68,126,000	67,886,000	216,032,000	140,246,000
Purchases			(645,658,000)	(214,285,000)
Net change in loans			(61,795,000)	(133,893,000)
Sales of FHLB stock			4,294,000	0
Purchases of FHLB stock			(663,000)	(515,000)
Purchases of premises and equipment			(5,193,000)	(2,652,000)
Proceeds from the sale of other real estate owned	4,173,000	1,411,000	8,834,000	5,561,000
Net cash acquired in business combinations			0	248,439,000
Net cash used in investing activities			(475,294,000)	71,158,000
Cash flows from financing activities:
Net increase in demand deposits			863,646,000	1,043,928,000
Net decrease in time deposits			(249,765,000)	(201,659,000)
Net increase in securities sold under agreements to repurchase			9,531,000	5,532,000
Payments on FHLB advances			0	(50,000,000)
Issuance of subordinated debt, net of issuance costs			0	98,190,000
Payments on subordinated debt			(60,000,000)	0
Accretion of subordinated debt fair value premium and amortization of issuance costs, net			(79,000)	(175,000)
(Payments on) proceeds from other borrowings			(15,000,000)	15,000,000
Share based compensation withholding payments			(10,042,000)	(1,268,000)
Net proceeds from sale of common stock under employee stock purchase program			1,480,000	978,000
Repurchase of common stock			(436,000)	0
Dividends paid			(16,324,000)	(10,025,000)
Noncontrolling interest distribution			(8,000)	0
Net cash provided by financing activities			523,003,000	900,501,000
Net change in cash and cash equivalents			6,666,000	829,710,000
Cash and cash equivalents at beginning of the period			1,317,898,000	232,681,000	$ 232,681,000
Cash and cash equivalents at end of the period	1,324,564,000	1,062,391,000	1,324,564,000	1,062,391,000	1,317,898,000
Supplemental cash flow information:
Interest paid			34,542,000	36,498,000
Taxes paid			55,609,000	16,449,000
Supplemental noncash disclosures:
Transfers from loans to other real estate owned	349,000	573,000	4,945,000	1,579,000
Transfers from other real estate owned to premises and equipment			0	841,000
Loans provided for sales of other real estate owned	152,000	0	685,000	0
Transfers from loans to loans held for sale			10,408,000	9,304,000
Transfers from loans held for sale to loans			52,151,000	49,508,000
Stock consideration paid in business combination			0	480,867,000
Trade date payable - securities			5,996,000	1,214,000	$ 0
Dividends declared not paid on restricted stock units	$ 340,000	$ 139,000	340,000	139,000
Decrease to retained earnings for adoption of new accounting standard			0	25,018,000
Right-of-use assets obtained in exchange for operating lease liabilities			$ 839,000	$ 806,000

Basis of presentation

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Basis of presentation

Basis of presentation:

Overview and presentation

FB Financial Corporation (the “Company”) is a financial holding company headquartered in Nashville, Tennessee. The Company operates through its wholly owned subsidiary, FirstBank (the "Bank"). As of September 30, 2021, the Bank had 82 full-service branches throughout Tennessee, Alabama, southern Kentucky and north Georgia, and a national mortgage business with office locations across the Southeast, which primarily originates loans to be sold in the secondary market.

The unaudited consolidated financial statements, including the notes thereto, have been prepared in accordance with United States generally accepted accounting principles interim reporting requirements and general banking industry guidelines, and therefore, do not include all information and notes included in the annual consolidated financial statements in conformity with GAAP. These interim consolidated financial statements and notes thereto should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K.

The unaudited consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods. The results for interim periods are not necessarily indicative of results for a full year.

In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and the reported results of operations for the periods then ended. Actual results could differ significantly from those estimates.

Certain prior period amounts have been reclassified to conform to the current period presentation without any impact on the reported amounts of net income or shareholders’ equity.

As of September 30, 2021, the Company continues to qualify as an emerging growth company as defined by the "Jumpstart Our Business Startups Act," however beginning on December 31, 2021, the Company will cease to qualify.

Risks and uncertainties

The COVID-19 health pandemic that arose in 2020 created a crisis resulting in volatility in financial markets, sudden, unprecedented job losses, and disruption in consumer and commercial behavior, resulting in governments in the United States and globally to intervene with varying levels of direct monetary support and fiscal stimulus packages. All industries, municipalities and consumers have been impacted by the health crisis to some degree, including the markets that we serve. In attempts to “flatten the curve,” businesses not deemed essential were closed or constrained to capacity limitations, individuals were asked to restrict their movements, observe social distancing and shelter in place. These actions resulted in rapid decreases in commercial and consumer activity, temporary closures of many businesses, leading to a loss of revenues and a rapid increase in unemployment, widening of credit spreads, dislocation of bond markets, disruption of global supply chains and changes in consumer spending behavior. Although most restrictions were lifted and vaccines became widely available during early 2021, during the nine months ended September 30, 2021, concern began building regarding the potential impact the new Delta variant of the virus may have on the global economy and the efficacy of available vaccines and booster vaccines to protect against widespread infection. Additionally, there continues to be concern regarding the potential downstream effects of vaccine mandates and supply chain disruptions and labor shortages continue to persist. As such, there continues to be uncertainty regarding the long term effects on the global economy, which could have a material adverse impact on the Company's business operations, asset valuations, financial condition, and results of operations.

Earnings per share

Basic EPS excludes dilution and is computed by dividing earnings available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted EPS includes the dilutive effect of additional potential common shares issuable under the restricted stock units granted but not yet vested and distributable. Diluted EPS is computed by dividing earnings available to common shareholders by the weighted average number of common shares outstanding for the period, plus an incremental number of common-equivalent shares computed using the treasury stock method.

Unvested share-based payment awards, which include the right to receive non-forfeitable dividends or dividend equivalents, are considered to participate with common shareholders in undistributed earnings for purposes of computing

EPS. Companies that have such participating securities are required to calculate basic and diluted EPS using the two-class method. Certain restricted stock awards granted by the Company include non-forfeitable dividend equivalents and are considered participating securities. Calculations of EPS under the two-class method (i) exclude from the numerator any dividends paid or owed on participating securities and any undistributed earnings considered to be attributable to participating securities and (ii) exclude from the denominator the dilutive impact of the participating securities.

The following is a summary of the basic and diluted earnings per common share calculation for each of the periods presented:


	Three Months Ended September 30,			Nine Months Ended September 30,
		2021		2020		2021		2020
Basic earnings (loss) per common share calculation:
Net income (loss) applicable to FB Financial Corporation		$	45,290	$	(5,599)	$	141,458	$	18,019
Dividends paid on and undistributed earnings allocated to participating securities		—		—		—		—
Earnings (loss) available to common shareholders		$	45,290	$	(5,599)	$	141,458	$	18,019
Weighted average basic shares outstanding		47,412,214		40,154,841		47,345,984		34,404,064
Basic earnings (loss) per common share		$	0.96	$	(0.14)	$	2.99	$	0.52
Diluted earnings per common share:
Earnings (loss) available to common shareholders		$	45,290	$	(5,599)	$	141,458	$	18,019
Weighted average basic shares outstanding		47,412,214		40,154,841		47,345,984		34,404,064
Weighted average diluted shares contingently issuable(1)		594,933		482,904		637,510		436,228
Weighted average diluted shares outstanding		48,007,147		40,637,745		47,983,494		34,840,292
Diluted earnings (loss) per common share		$	0.94	$	(0.14)	$	2.95	$	0.52

(1)Excludes 15,974 and 20,448 restricted stock units outstanding considered to be antidilutive for the three and nine months ended September 30, 2021, respectively and 332,347 and 536,908 for three and nine months ended September 30, 2020.

Recently adopted accounting policies:

The Company did not modify or adopt any new accounting policies during the three and nine months ended September 30, 2021 that were not disclosed in the Company's 2020 audited consolidated financial statements included on Form 10-K, other than as described below.

As previously disclosed, during the three months ended March 31, 2021, the Company reevaluated its business segments to align all retail mortgage activities with the Mortgage segment. Previously, the Company assigned retail mortgage activities within the Banking geographical footprint to the Banking segment. See Note 12, "Segment reporting" for additional information on this change.

Recently adopted accounting standards:

Except as set forth below, the Company did not adopt any new accounting standards that were not disclosed in the Company's 2020 audited consolidated financial statements included on Form 10-K.

In January 2021, Financial Accounting Standards Board issued ASU 2021-01, "Reference Rate Reform (Topic 848): Scope". This ASU clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The ASU also amends the expedients and exceptions in Topic 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. The Company early adopted ASU 2021-01 upon issuance effective January 7, 2021. No contract modifications have been made under the new guidance, therefore the adoption of this update did not impact the Company's financial statements or disclosures.

Newly issued not yet effective accounting standards:

In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 is intended to provide relief for companies preparing for discontinuation of interest rates based on LIBOR. The ASU provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or other reference rates expected to be discontinued. ASU 2020-04 also provides for a onetime sale and/or transfer to AFS or trading to be made for HTM debt securities that both reference an eligible reference rate and were classified as HTM before January 1, 2020. ASU 2020-04 was effective for all entities as of March 12, 2020 and through December 31, 2022. Companies can apply the ASU as of the beginning of the interim period that includes March 12, 2020 or any date

thereafter. The guidance requires companies to apply the guidance prospectively to contract modifications and hedging relationships while the one-time election to sell and/or transfer debt securities classified as HTM may be made any time after March 12, 2020. We have established a working group to transition from LIBOR and have begun efforts to transition to alternative rates consistent with industry timelines. We have identified products that utilize LIBOR and are implementing enhanced fallback language to facilitate the transition to alternative reference rates. ASU 2020-04 is not expected to have a material impact on our consolidated financial statements.

Mergers and acquisitions

9 Months Ended

Sep. 30, 2021

Business Combination and Asset Acquisition [Abstract]

Mergers and acquisitions

Mergers and acquisitions:

The following mergers and acquisitions were accounted for pursuant to Accounting Standards Codification 805, "Business Combinations". Accordingly, the purchase price of each acquisition was allocated to the acquired assets and liabilities assumed based on estimated fair values as of the respective acquisition dates. The excess of the purchase price over the net assets acquired was recorded as goodwill.

Franklin Financial Network, Inc. merger

Effective August 15, 2020, the Company completed its previously announced merger with Franklin Financial Network, Inc. and its wholly owned subsidiaries (collectively, "Franklin"), with FB Financial Corporation continuing as the surviving entity. After consolidating duplicative locations the merger added 10 branches and expanded the Company's footprint in middle Tennessee and the Nashville metropolitan statistical area. Under the terms of the agreement, the Company acquired total assets of $3.63 billion, loans of $2.79 billion and assumed total deposits of $3.12 billion. Total loans acquired includes a non-strategic institutional portfolio with a fair value of $326,206 the Company classified as held for sale. Franklin common shareholders received 15,058,181 shares of the Company's common stock, net of the equivalent value of 44,311 shares withheld on certain Franklin employee equity awards that vested upon change in control, as consideration in connection with the merger, in addition to $31,330 in cash consideration. Also included in the purchase price, the Company issued replacement restricted stock units for awards initially granted by Franklin during 2020 that did not vest upon change in control, with a total fair value of $674 attributed to pre-combination service. Based on the closing price of the Company's common stock on the New York Stock Exchange of $29.52 on August 15, 2020, the merger consideration represented approximately $477,830 in aggregate consideration.

Goodwill of $67,191 recorded in connection with the transaction resulted from the ongoing business contribution, reputation, operating model and expertise of Franklin. The goodwill is not deductible for income tax purposes. Goodwill is included in the Banking segment as substantially all of the operations resulting from the acquisition of Franklin are in alignment with the Company's banking business.

The following table presents an allocation of the consideration to net assets acquired:


Purchase Price:
Equity consideration
Franklin shares outstanding(1)	15,588,337
Franklin options converted to net shares	62,906
	15,651,243
Exchange ratio to FB Financial shares	0.965
FB Financial shares to be issued as merger consideration(2)	15,102,492
Issuance price as of August 15, 2020	$	29.52
Value of FB Financial stock to be issued as merger consideration	$	445,826
Less: tax withholding on vested restricted stock awards, units and options(3)	(1,308)
Value of FB Financial stock issued	$	444,518
FB Financial shares issued	15,058,181

Franklin restricted stock units that do not vest on change in control	114,915
Replacement awards issued to Franklin employees	118,776
Fair value of replacement awards	$	3,506
Fair value of replacement awards attributable to pre-combination service	$	674

Cash consideration
Total Franklin shares and net shares outstanding	15,651,243
Cash consideration per share	$	2.00
Total cash to be paid to Franklin(4)	$	31,330
Total purchase price			$	477,830
Fair value of net assets acquired			410,639
Goodwill resulting from merger			$	67,191

(1)Franklin shares outstanding includes restricted stock awards and restricted stock units that vested upon change in control.

(2)Only factors in whole share issuance. Cash was paid in lieu of fractional shares.

(3)Represents the equivalent value of approximately 44,311 shares of FB Financial Corporation stock on August 15, 2020.

(4)Includes $28 of cash paid in lieu of fractional shares.

FNB Financial Corp. merger

Effective February 14, 2020, the Company completed its previously announced acquisition of FNB Financial Corp. and its wholly owned subsidiary, Farmers National Bank of Scottsville (collectively, "Farmers National"). Following the acquisition, Farmers National was merged into the Company with FB Financial Corporation continuing as the surviving entity. The transaction added four branches and expanded the Company's footprint into Kentucky. Under the terms of the agreement, the Company acquired total assets of $258,218, loans of $182,171 and assumed total deposits of $209,535. Farmers National shareholders received 954,797 shares of the Company's common stock as consideration in connection with the merger, in addition to $15,001 in cash consideration. Based on the closing price of the Company's common stock on the New York Stock Exchange of $36.70 on February 14, 2020, the merger consideration represented approximately $50,042 in aggregate consideration.

Goodwill of $6,319 recorded in connection with the transaction resulted from the ongoing business contribution of Farmers National and anticipated synergies arising from the combination of certain operational areas of the Company. Goodwill resulting from this transaction is not deductible for income tax purposes. Goodwill is included in the Banking segment as substantially all of the operations resulting from the acquisition of Farmers National are in alignment with the Company's core banking business.

The following table presents the total purchase price, fair value of net assets acquired, and the goodwill as of the acquisition date.


Consideration:
Net shares issued	954,797
Purchase price per share on February 14, 2020	$	36.70
Value of stock consideration			$	35,041
Cash consideration paid			15,001
Total purchase price			$	50,042
Fair value of net assets acquired			43,723
Goodwill resulting from merger			$	6,319

Net assets acquired

The following table summarizes the estimated fair values of assets acquired and liabilities assumed as of the respective acquisition dates:


	As of August 15, 2020		As of February 14, 2020
	Franklin Financial Network, Inc.		FNB Financial Corp.
ASSETS
Cash and cash equivalents	$	284,004	$	10,774
Investments	373,462		50,594
Mortgage loans held for sale, at fair value	38,740		—
Commercial loans held for sale, at fair value	326,206		—
Loans held for investment, net of fair value adjustments	2,427,527		182,171
Allowance for credit losses on purchased credit deteriorated loans	(24,831)		(669)
Premises and equipment	45,471		8,049
Operating lease right-of-use assets	23,958		14
Mortgage servicing rights	5,111		—
Core deposit intangible	7,670		2,490
Other assets	124,571		4,795
Total assets	$	3,631,889	$	258,218
LIABILITIES
Deposits:
Noninterest-bearing	$	505,374	$	63,531
Interest-bearing checking	1,783,379		26,451
Money market and savings	342,093		37,002
Customer time deposits	383,433		82,551
Brokered and internet time deposits	107,452		—
Total deposits	3,121,731		209,535

Borrowings	62,435		3,192
Operating lease liabilities	24,330		14
Accrued expenses and other liabilities	12,661		1,754
Total liabilities assumed	3,221,157		214,495
Noncontrolling interests acquired	93		—
Net assets acquired	$	410,639	$	43,723

Purchased credit-deteriorated loans

Under the CECL methodology, the Company is required to determine whether purchased loans held for investment have experienced more-than-insignificant deterioration in credit quality since origination. Loans that have experienced this level of deterioration in credit quality are subject to special accounting at initial recognition and measurement. The Company initially measures the amortized cost of a PCD loan by adding the acquisition date estimate of expected credit losses to the loan's purchase price (i.e. the "gross up" approach). There is no provision for credit loss recognized upon acquisition of a PCD loan because the initial allowance is established through gross-up of the loans' amortized cost.

The Company determined that 27.9% of the Franklin loan portfolio had more-than-insignificant deterioration in credit quality since origination as of the acquisition date. This included deterioration in credit metrics, such as delinquency, nonaccrual status or risk ratings as well as certain loans within designated industries of concern that have been negatively impacted by COVID-19. It was determined that 10.1% of the Farmers National loan portfolio had more-than-insignificant deterioration in credit quality since origination as of the February acquisition date. These were primarily delinquent loans or loans that Farmers National had classified as nonaccrual or troubled debt restructuring prior to the Company's acquisition.


	As of August 15, 2020		As of February 14, 2020
	Franklin Financial Network, Inc.		FNB Financial Corp.
Purchased credit-deteriorated loans
Principal balance	$	693,999	$	18,964
Allowance for credit losses at acquisition	(24,831)		(669)
Net premium attributable to other factors	8,810		63
Loans purchased credit-deteriorated fair value	$	677,978	$	18,358

Loans recognized through acquisition that have not experienced more-than-insignificant credit deterioration since origination are initially recognized at the purchase price. Expected credit losses are measured under CECL through the provision for credit losses. The Company recorded provisions for credit losses in the amounts of $52,822 and $2,885 as of August 15, 2020 and February 14, 2020, respectively, in the income statement related to estimated credit losses on non-PCD loans from Franklin and Farmers National, respectively. Additionally, the Company estimates expected credit losses on off-balance sheet loan commitments that are not accounted for as derivatives. The Company recorded an increase in provision for credit losses from unfunded commitments of $10,499 as of August 15, 2020 related to the Franklin acquisition.

Pro forma financial information (unaudited)

The results of operations of the acquisitions have been included in the Company's consolidated financial statements prospectively beginning on the date of each acquisition. The acquisitions have been fully integrated with the Company's existing operations. Accordingly, post-acquisition net interest income, total revenues, and net income are not discernible. The following unaudited pro forma condensed consolidated financial information presents the results of operations for the three and nine months ended September 30, 2020, as though the Franklin and Farmers National acquisitions had been completed as of January 1, 2019. The unaudited estimated pro forma information combines the historical results of the mergers with the Company’s historical consolidated results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the periods presented. Merger expenses are reflected in the period they were incurred. The pro forma information is not indicative of what would have occurred had the transactions taken place on January 1, 2019 and does not include the effect of cost-saving or revenue-enhancing strategies.


	Three Months Ended September 30,		Nine Months Ended September 30,
	2020		2020
Net interest income	$	83,641	$	252,849
Total revenues	$	178,384	$	488,493
Net (loss) income applicable to FB Financial Corporation	$	(12,428)	$	19,526

Investment securities

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Investment securities

Investment securities:

The following tables summarize the amortized cost, allowance for credit losses and fair value of the available-for-sale debt securities and the corresponding amounts of unrealized gains and losses recognized in accumulated other comprehensive income at September 30, 2021 and December 31, 2020:


	September 30, 2021
	Amortized cost		Gross unrealized gains		Gross unrealized losses		Allowance for credit losses for investments		Fair Value
Investment Securities
Available-for-sale debt securities
U.S. government agency securities	$	10,598	$	5	$	(32)	$	—	$	10,571
Mortgage-backed securities - residential	1,211,042		9,111		(9,650)		—		1,210,503
Mortgage-backed securities - commercial	15,374		368		(30)		—		15,712
Municipal securities	312,672		14,881		(314)		—		327,239
U.S. Treasury securities	5,998		8		—		—		6,006
Corporate securities	2,500		35		(8)		—		2,527
Total	$	1,558,184	$	24,408	$	(10,034)	$	—	$	1,572,558


	December 31, 2020
	Amortized cost		Gross unrealized gains		Gross unrealized losses		Allowance for credit losses for investments		Fair Value
Investment Securities
Available-for-sale debt securities
U.S. government agency securities	$	2,000	$	3	$	—	$	—	$	2,003
Mortgage-backed securities - residential	760,099		14,040		(803)		—		773,336
Mortgage-backed securities - commercial	20,226		1,362		—		—		21,588
Municipal securities	336,543		19,806		(20)		—		356,329
U.S. Treasury securities	16,480		148		—		—		16,628
Corporate securities	2,500		17		(1)		—		2,516
Total	$	1,137,848	$	35,376	$	(824)	$	—	$	1,172,400

The components of amortized cost for debt securities on the consolidated balance sheets excludes accrued interest receivable since the Company elected to present accrued interest receivable separately on the consolidated balance sheets. As of September 30, 2021 and December 31, 2020, total accrued interest receivable on debt securities was $4,744 and $4,540, respectively.

As of September 30, 2021 and December 31, 2020, the Company had $4,779 and $4,591, in marketable equity securities recorded at fair value, respectively.

Securities pledged at September 30, 2021 and December 31, 2020 had carrying amounts of $1,154,797 and $804,821, respectively, and were pledged to secure a Federal Reserve Bank line of credit, public deposits and repurchase agreements.

There were no holdings of securities of any one issuer, other than U.S. Government sponsored enterprises, in an amount greater than 10% of shareholders' equity during any period presented.

At September 30, 2021 and December 31, 2020, there were no trade date receivables that related to sales settled after period end. At September 30, 2021 and December 31, 2020, there were $5,996 and $0 respectively, in trade date payables that related to purchases settled after period end.

The amortized cost and fair value of debt securities by contractual maturity at September 30, 2021 and December 31, 2020 are shown below. Maturities may differ from contractual maturities in mortgage-backed securities because the mortgage underlying the security may be called or repaid without any penalties. Therefore, mortgage-backed securities are not included in the maturity categories in the following maturity summary.


	September 30,				December 31,
	2021				2020
	Available-for-sale				Available-for-sale
	Amortized cost		Fair value		Amortized cost		Fair value
Due in one year or less	$	16,713	$	16,773	$	35,486	$	35,662
Due in one to five years	20,242		20,637		24,278		24,684
Due in five to ten years	40,757		42,211		40,038		41,332
Due in over ten years	254,056		266,722		257,721		275,798
	331,768		346,343		357,523		377,476
Mortgage-backed securities - residential	1,211,042		1,210,503		760,099		773,336
Mortgage-backed securities - commercial	15,374		15,712		20,226		21,588
Total debt securities	$	1,558,184	$	1,572,558	$	1,137,848	$	1,172,400

Sales and other dispositions of available-for-sale securities were as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Proceeds from sales	$	8,855	$	28,257	$	8,855	$	28,257
Proceeds from maturities, prepayments and calls	68,126		67,886		216,032		140,246
Gross realized gains	76		563		91		563
Gross realized losses	1		39		1		39

Additionally, the change in the fair value of equity securities resulted in a net unrealized loss of $24 and a net unrealized gain of $188 during the three and nine months ended September 30, 2021, respectively, net unrealized gains on equity securities of $59 and $94 were recognized in the three and nine months ended September 30, 2020, respectively.

The following tables show gross unrealized losses for which an allowance for credit losses has not been recorded at September 30, 2021 and December 31, 2020, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position:


	September 30, 2021
	Less than 12 months				12 months or more				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government agency securities	$	7,639	$	(32)	$	—	$	—	$	7,639	$	(32)
Mortgage-backed securities - residential	711,775		(9,377)		24,341		(273)		736,116		(9,650)
Mortgage-backed securities - commercial	1,949		(30)		—		—		1,949		(30)
Municipal securities	30,371		(314)		—		—		30,371		(314)

Corporate securities	492		(8)		—		—		492		(8)
Total	$	752,226	$	(9,761)	$	24,341	$	(273)	$	776,567	$	(10,034)


	December 31, 2020
	Less than 12 months				12 months or more				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized loss

Mortgage-backed securities - residential	$	182,012	$	(803)	$	—	$	—	$	182,012	$	(803)
Municipal securities	3,184		(20)		—		—		3,184		(20)
Corporate Securities	499		(1)						499		(1)

Total	$	185,695	$	(824)	$	—	$	—	$	185,695	$	(824)

As of September 30, 2021 and December 31, 2020, the Company’s securities portfolio consisted of 513 and 514 securities, 61 and 16 of which were in an unrealized loss position, respectively.

As of September 30, 2021 and 2020, the Company evaluated available-for-sale debt securities with unrealized losses for expected credit loss and recorded no allowance for credit loss as the majority of the investment portfolio was either government guaranteed or an issuance of a government sponsored entity, was highly rated by major credit rating agencies and have a long history of zero losses. As such, no provision for credit losses was recorded during the three and nine months ended September 30, 2021 and 2020.

Loans and allowance for credit losses

9 Months Ended

Sep. 30, 2021

Receivables [Abstract]

Loans and allowance for credit losses

Loans and allowance for credit losses:

Loans outstanding at September 30, 2021 and December 31, 2020, by class of financing receivable are as follows:


	September 30,		December 31,
	2021		2020
Commercial and industrial (1)	$	1,252,425	$	1,346,122
Construction	1,190,623		1,222,220
Residential real estate:
1-to-4 family mortgage	1,175,155		1,089,270
Residential line of credit	392,440		408,211
Multi-family mortgage	324,662		175,676
Commercial real estate:
Owner occupied	938,241		924,841
Non-owner occupied	1,695,573		1,598,979
Consumer and other	325,555		317,640
Gross loans	7,294,674		7,082,959
Less: Allowance for credit losses	(139,446)		(170,389)
Net loans	$	7,155,228	$	6,912,570

(1)Includes $9,415 and $212,645 of loans originated as part of the Paycheck Protection Program as of September 30, 2021 and December 31, 2020, respectively. PPP loans are federally guaranteed as part of the CARES Act, provided PPP loan recipients receive loan forgiveness under the SBA regulations. As such, there is minimal credit risk associated with these loans.

As of September 30, 2021 and December 31, 2020, $1,220,451 and $1,248,857, respectively, of qualifying residential mortgage loans (including loans held for sale) and $1,571,007 and $1,532,749, respectively, of qualifying commercial mortgage loans were pledged to the Federal Home Loan Bank of Cincinnati securing advances against the Bank’s line of credit. Additionally, as of September 30, 2021 and December 31, 2020, $2,345,431 and $2,463,281, respectively, of qualifying loans were pledged to the Federal Reserve Bank under the Borrower-in-Custody program.

The components of amortized cost for loans on the consolidated balance sheet excludes accrued interest receivable as the Company elected to present accrued interest receivable separately on the balance sheet. As of September 30, 2021 and December 31, 2020, total accrued interest receivable on loans held for investment was $34,915 and $38,316, respectively.

Allowance for Credit Losses

The Company estimated the allowance for credit losses under a current expected credit loss model as of September 30, 2021 and December 31, 2020. The Company utilizes probability-weighted forecasts, which consider multiple macroeconomic variables from a third-party vendor that are applicable to the type of loan. Each of the Company's loss rate models incorporate forward-looking macroeconomic projections throughout the reasonable and supportable forecast period and the subsequent historical reversion at the macroeconomic variable input level. In order to estimate the life of a loan, the contractual term of the loan is adjusted for estimated prepayments based on market information and the Company’s prepayment history.

The Company's loss rate models estimate the lifetime loss rate for pools of loans by combining the calculated loss rate based on each variable within the model (including the macroeconomic variables). The lifetime loss rate for the pool is then multiplied by the loan balances to determine the expected credit losses on the pool.

The Company considers the need to qualitatively adjust its modeled quantitative expected credit loss estimate for information not already captured in the model loss estimation process. These qualitative factor adjustments may increase or decrease the Company’s estimate of expected credit losses. The Company reviews the qualitative adjustments so as to validate that information that has already been considered and included in the modeled quantitative loss estimation process is not also included in the qualitative adjustment. The Company considers the qualitative factors that are relevant to the institution as of the reporting date, which may include, but are not limited to: levels of and trends in delinquencies

and performance of loans; levels of and trends in write-offs and recoveries collected; trends in volume and terms of loans; effects of any changes in reasonable and supportable economic forecasts; effects of any changes in risk selection and underwriting standards; other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and expertise; available relevant information sources that contradict the Company’s own forecast; effects of changes in prepayment expectations or other factors affecting assessments of loan contractual terms; industry conditions; and effects of changes in credit concentrations.

The quantitative models require loan data and macroeconomic variables based on the inherent credit risks in each portfolio to more accurately measure the credit risks associated with each. Each of the quantitative models pools loans with similar risk characteristics and collectively assesses the lifetime loss rate for each pool to estimate its expected credit loss.

When a loan no longer shares similar risk characteristics with other loans in any given pool, the loan is individually assessed. The Company has determined the following circumstances in which a loan may require an individual evaluation: collateral dependent loans; loans for which foreclosure is probable; TDRs and reasonably expected TDRs. A loan is deemed collateral dependent when 1) the borrower is experiencing financial difficulty and 2) the repayment is expected to be primarily through sale or operation of the collateral. The allowance for credit losses for collateral dependent loans as well as loans where foreclosure is probable is calculated as the amount for which the loan’s amortized cost basis exceeds fair value. Fair value is determined based on appraisals performed by qualified appraisers and reviewed by qualified personnel. In cases where repayment is to be provided substantially through the sale of collateral, the Company reduces the fair value by the estimated costs to sell. Loans experiencing financial difficulty for which a concession has not yet been provided may be identified as reasonably expected TDRs.

Reasonably expected TDRs use the same methodology as TDRs. In cases where the expected credit loss can only be captured through a discounted cash flow analysis (such as an interest rate modification for a TDR loan), the allowance is measured by the amount which the loan’s amortized cost exceeds the discounted cash flow analysis. The allowance for credit losses on a TDR or a reasonably expected TDR is calculated individually using a discounted cash flow methodology, unless the loan is deemed to be collateral dependent or foreclosure is probable.

The Company performed qualitative evaluations within the Company's established qualitative framework, weighting the impact of the current economic outlook, status of federal government stimulus programs, and other considerations, in order to identify specific industries or borrowers seeing credit improvement or deterioration specific to the COVID-19 pandemic. The decrease in estimated required reserve during the three and nine months ended September 30, 2021 was a result of improving macroeconomic variables incorporated into the Company's reasonable and supportable forecasts when compared to both September 30, 2021 and December 31, 2020.

The following provide the changes in the allowance for credit losses by class of financing receivable for the three and nine months ended September 30, 2021 and 2020:


	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Three months ended September 30, 2021
Beginning balance - June 30, 2021	$	13,791	$	32,838	$	19,672	$	6,716	$	13,475	$	4,707	$	42,856	$	10,608	$	144,663
Provision for credit losses	3,203		(3,080)		(2,677)		(952)		(1,462)		7,665		(6,450)		921		(2,832)
Recoveries of loans previously charged-off	19		3		33		1		—		4		—		169		229
Loans charged off	(2,175)		(1)		—		—		—		—		—		(438)		(2,614)


Ending balance - September 30, 2021	$	14,838	$	29,760	$	17,028	$	5,765	$	12,013	$	12,376	$	36,406	$	11,260	$	139,446
Nine Months Ended September 30, 2021
Beginning balance - December 31, 2020	$	14,748	$	58,477	$	19,220	$	10,534	$	7,174	$	4,849	$	44,147	$	11,240	$	170,389


Provision for credit losses	2,667		(28,690)		(2,141)		(4,767)		4,839		7,384		(7,741)		1,100		(27,349)
Recoveries of loans previously charged-off	235		3		98		16		—		143		—		554		1,049
Loans charged off	(2,812)		(30)		(149)		(18)		—		—		—		(1,634)		(4,643)


Ending balance - September 30, 2021	$	14,838	$	29,760	$	17,028	$	5,765	$	12,013	$	12,376	$	36,406	$	11,260	$	139,446


	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Three months ended September 30, 2020
Beginning balance - June 30, 2020	$	8,878	$	35,599	$	12,463	$	6,811	$	4,499	$	7,420	$	30,444	$	7,015	$	113,129
Provision for loan losses	(1,520)		22,383		4,194		4,053		1,908		(1,276)		12,364		3,728		45,834
Recoveries of loans previously charged-off	757		51		116		22		—		51		—		175		1,172
Loans charged off	(249)		—		(8)		—		—		(95)		(166)		(475)		(993)
Initial allowance on loans purchased with deteriorated credit quality	$	743	$	5,596	$	1,533	$	569	$	784	$	605	$	14,998	$	3	$	24,831
Ending balance - September 30, 2020	$	8,609	$	63,629	$	18,298	$	11,455	$	7,191	$	6,705	$	57,640	$	10,446	$	183,973
Nine Months Ended September 30, 2020
Beginning balance - December 31, 2019	$	4,805	$	10,194	$	3,112	$	752	$	544	$	4,109	$	4,621	$	3,002	$	31,139
Impact of adopting ASC 326 on non-purchased credit deteriorated loans	5,300		1,533		7,920		3,461		340		1,879		6,822		3,633		30,888
Impact of adopted ASC 326 on purchased credit deteriorated loans	82		150		421		(3)		—		162		184		(438)		558
Provision for loan losses	(2,354)		45,962		5,412		6,633		5,523		132		31,282		5,247		97,837
Recoveries of loans previously charged-off	1,652		202		166		61		—		68		—		471		2,620
Loans charged off	(1,630)		(18)		(373)		(21)		—		(304)		(711)		(1,512)		(4,569)
Initial allowance on loans purchased with deteriorated credit quality	754		5,606		1,640		572		784		659		15,442		43		25,500

Ending balance - September 30, 2020	$	8,609	$	63,629	$	18,298	$	11,455	$	7,191	$	6,705	$	57,640	$	10,446	$	183,973

The following tables provide the amount of the allowance for credit losses by class of financing receivable disaggregated by measurement methodology as of September 30, 2021 and December 31, 2020:


	September 30, 2021
	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Amount of allowance allocated to:
Individually evaluated for credit loss	$	123	$	112	$	—	$	7	$	—	$	167	$	624	$	2	$	1,035
Collectively evaluated for credit loss	14,148		28,244		16,056		5,597		11,561		11,244		26,676		10,657		124,183
Purchased credit deteriorated	567		1,404		972		161		452		965		9,106		601		14,228
Ending balance - September 30, 2021	$	14,838	$	29,760	$	17,028	$	5,765	$	12,013	$	12,376	$	36,406	$	11,260	$	139,446


	December 31, 2020
	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Amount of allowance allocated to:
Individually evaluated for credit loss	$	373	$	95	$	—	$	9	$	—	$	30	$	1,531	$	1	$	2,039
Collectively evaluated for credit loss	13,493		54,065		17,206		10,031		6,326		4,062		33,706		10,516		149,405
Purchased credit deteriorated	882		4,317		2,014		494		848		757		8,910		723		18,945
Ending balance - December 31, 2020	$	14,748	$	58,477	$	19,220	$	10,534	$	7,174	$	4,849	$	44,147	$	11,240	$	170,389

The following tables provide the amount of loans by class of financing receivable disaggregated by measurement methodology as of September 30, 2021, and December 31, 2020:


	September 30, 2021
	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Loans, net of unearned income
Individually evaluated for credit loss	$	2,802	$	4,597	$	375	$	1,123	$	—	$	7,808	$	11,430	$	26	$	28,161
Collectively evaluated for credit loss	1,206,783		1,148,604		1,112,578		380,272		315,140		857,865		1,419,981		313,079		6,754,302
Purchased credit deteriorated	42,840		37,422		62,202		11,045		9,522		72,568		264,162		12,450		512,211
Ending balance - September 30, 2021	$	1,252,425	$	1,190,623	$	1,175,155	$	392,440	$	324,662	$	938,241	$	1,695,573	$	325,555	$	7,294,674


	December 31, 2020
	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Loans, net of unearned income
Individually evaluated for credit loss	$	15,578	$	4,851	$	848	$	412	$	—	$	7,846	$	8,631	$	39	$	38,205
Collectively evaluated for credit loss	1,270,058		1,140,634		987,142		387,250		156,447		813,151		1,272,203		302,983		6,329,868
Purchased credit deteriorated	60,486		76,735		101,280		20,549		19,229		103,844		318,145		14,618		714,886
Ending balance - December 31, 2020	$	1,346,122	$	1,222,220	$	1,089,270	$	408,211	$	175,676	$	924,841	$	1,598,979	$	317,640	$	7,082,959

Credit Quality

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans that share similar risk characteristics collectively. Loans that do not share similar risk characteristics are evaluated individually.

The Company uses the following definitions for risk ratings:


			Pass.			Loans rated Pass include those that are adequately collateralized performing loans which management believes do not have conditions that have occurred or may occur that would result in the loan being downgraded into an inferior category. The Pass category also includes loans rated as Watch, which include those that management believes have conditions that have occurred, or may occur, which could result in the loan being downgraded to an inferior category.




			Special Mention.			Loans rated Special Mention are those that have potential weakness that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in the institution’s credit position at some future date. Management does not believe there will be a loss of principal or interest. These loans require intensive servicing and may possess more than normal credit risk.




			Classified.			Loans included in the Classified category include loans rated as Substandard and Doubtful. Loans rated as Substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Also included in this category are loans classified as Doubtful, which have all the weaknesses inherent in those classified as Substandard, with the added characteristic that the weakness or weaknesses make collection or liquidation in full, based on currently existing facts, conditions, and values, highly questionable and improbable. The total amortized cost of loans rated as Doubtful were insignificant for all periods presented.

Risk ratings are updated on an ongoing basis and are subject to change by continuous loan monitoring processes.

The following tables present the credit quality of our loan portfolio by year of origination as of September 30, 2021 and December 31, 2020. Revolving loans are presented separately. Management considers the guidance in ASC 310-20 when determining whether a modification, extension, or renewal constitutes a current period origination. Generally, current period renewals of credit are reunderwritten at the point of renewal and considered current period originations for the purposes of the tables below.


As of September 30, 2021
	Term Loans
	Amortized Cost Basis by Origination Year
	2021		2020		2019		2018		2017		Prior		Revolving Loans Amortized Cost Basis		Total
Commercial and industrial
Pass	$	194,285	$	105,301	$	151,572	$	60,459	$	44,334	$	61,502	$	591,465	$	1,208,918
Special Mention	68		246		414		19		5		2,051		12,987		15,790
Classified	893		2,601		2,678		3,527		3,618		6,711		7,689		27,717

Total	195,246		108,148		154,664		64,005		47,957		70,264		612,141		1,252,425

Construction
Pass	455,443		337,263		145,945		47,026		19,507		67,697		106,294		1,179,175
Special Mention	—		—		—		—		1,209		1,441		—		2,650
Classified	—		—		3,035		2,879		4		2,698		182		8,798

Total	455,443		337,263		148,980		49,905		20,720		71,836		106,476		1,190,623

Residential real estate:
1-to-4 family mortgage
Pass	360,638		217,308		128,286		115,183		116,907		211,215		—		1,149,537
Special Mention	201		1,346		525		389		99		1,648		—		4,208
Classified	901		2,884		1,962		3,086		4,549		8,028		—		21,410

Total	361,740		221,538		130,773		118,658		121,555		220,891		—		1,175,155

Residential line of credit
Pass	—		—		—		—		—		—		387,472		387,472
Special Mention	—		—		—		—		—		—		407		407
Classified	—		—		—		—		—		—		4,561		4,561

Total	—		—		—		—		—		—		392,440		392,440

Multi-family mortgage
Pass	144,982		32,463		68,421		7,050		20,528		39,546		10,408		323,398
Special Mention	—		—		—		—		—		—		—		—
Classified	—		—		—		—		—		1,264		—		1,264

Total	144,982		32,463		68,421		7,050		20,528		40,810		10,408		324,662


Commercial real estate:
Owner occupied
Pass	117,740		140,281		177,960		86,488		83,352		247,941		52,732		906,494
Special Mention	—		—		1,328		3,595		112		2,948		220		8,203
Classified	—		—		3,118		779		4,122		13,770		1,755		23,544

Total	117,740		140,281		182,406		90,862		87,586		264,659		54,707		938,241

Non-owner occupied
Pass	304,279		163,471		180,893		282,221		203,813		460,088		46,599		1,641,364
Special Mention	—		—		3,812		3,452		—		8,041		—		15,305
Classified	—		—		2,082		24,173		1,524		11,125		—		38,904

Total	304,279		163,471		186,787		309,846		205,337		479,254		46,599		1,695,573


As of September 30, 2021
	Term Loans
	Amortized Cost Basis by Origination Year
	2021		2020		2019		2018		2017		Prior		Revolving Loans Amortized Cost Basis		Total
Consumer and other loans
Pass	72,706		59,182		40,851		34,539		22,783		74,776		14,827		319,664
Special Mention	75		—		10		—		1		383		—		469
Classified	43		129		341		1,015		897		2,561		436		5,422

Total	72,824		59,311		41,202		35,554		23,681		77,720		15,263		325,555

Total Loans
Pass	1,650,073		1,055,269		893,928		632,966		511,224		1,162,765		1,209,797		7,116,022
Special Mention	344		1,592		6,089		7,455		1,426		16,512		13,614		47,032
Classified	1,837		5,614		13,216		35,459		14,714		46,157		14,623		131,620

Total	$	1,652,254	$	1,062,475	$	913,233	$	675,880	$	527,364	$	1,225,434	$	1,238,034	$	7,294,674


As of December 31, 2020
	Term Loans
	Amortized Cost Basis by Origination Year
	2020		2019		2018		2017		2016		Prior		Revolving Loans Amortized Cost Basis		Total
Commercial and industrial
Pass	$	339,074	$	185,636	$	70,549	$	59,917	$	37,573	$	42,685	$	540,960	$	1,276,394
Special Mention	231		824		561		445		915		2,580		24,826		30,382
Classified	2,501		2,688		11,227		4,425		6,582		1,277		10,646		39,346

Total	341,806		189,148		82,337		64,787		45,070		46,542		576,432		1,346,122

Construction
Pass	461,715		390,443		86,490		52,942		40,907		62,890		112,004		1,207,391
Special Mention	469		1,485		2,197		1,221		729		13		—		6,114
Classified	573		1,755		3,178		141		—		3,068		—		8,715

Total	462,757		393,683		91,865		54,304		41,636		65,971		112,004		1,222,220

Residential real estate:
1-to-4 family mortgage
Pass	283,107		176,711		164,499		157,731		111,194		162,051		—		1,055,293
Special Mention	1,423		1,829		1,209		753		721		3,865		—		9,800
Classified	448		1,428		3,806		5,473		3,622		9,400		—		24,177

Total	284,978		179,968		169,514		163,957		115,537		175,316		—		1,089,270

Residential line of credit
Pass	—		—		—		—		—		—		400,206		400,206
Special Mention	—		—		—		—		—		—		2,653		2,653
Classified	—		—		—		—		—		—		5,352		5,352

Total	—		—		—		—		—		—		408,211		408,211

Multi-family mortgage
Pass	29,006		13,446		11,843		46,561		28,330		35,339		11,094		175,619
Special Mention	—		—		—		—		—		—		—		—
Classified	—		—		—		—		—		57		—		57

Total	29,006		13,446		11,843		46,561		28,330		35,396		11,094		175,676


Commercial real estate:
Owner occupied
Pass	140,904		179,500		97,577		94,659		76,539		224,108		53,451		866,738
Special Mention	967		1,356		4,251		16,173		6,101		2,466		230		31,544
Classified	44		1,785		2,423		6,074		274		11,226		4,733		26,559

Total	141,915		182,641		104,251		116,906		82,914		237,800		58,414		924,841

Non-owner occupied
Pass	166,962		229,442		342,640		221,149		290,163		272,184		38,820		1,561,360
Special Mention	—		1,500		6,672		—		207		8,445		—		16,824
Classified	—		2,210		1,502		—		—		17,083		—		20,795

Total	166,962		233,152		350,814		221,149		290,370		297,712		38,820		1,598,979

Consumer and other loans
Pass	89,625		52,839		39,725		27,201		43,503		37,673		14,817		305,383
Special Mention	281		797		1,588		468		526		1,364		11		5,035
Classified	151		565		1,434		1,161		935		2,308		668		7,222

Total	90,057		54,201		42,747		28,830		44,964		41,345		15,496		317,640


As of December 31, 2020
	Term Loans
	Amortized Cost Basis by Origination Year
	2020		2019		2018		2017		2016		Prior		Revolving Loans Amortized Cost Basis		Total
Total Loans
Pass	1,510,393		1,228,017		813,323		660,160		628,209		836,930		1,171,352		6,848,384
Special Mention	3,371		7,791		16,478		19,060		9,199		18,733		27,720		102,352
Classified	3,717		10,431		23,570		17,274		11,413		44,419		21,399		132,223

Total	$	1,517,481	$	1,246,239	$	853,371	$	696,494	$	648,821	$	900,082	$	1,220,471	$	7,082,959

Nonaccrual and Past Due Loans

Nonperforming loans include loans that are no longer accruing interest (nonaccrual loans) and loans past due ninety or more days and still accruing interest.

The following tables represent an analysis of the aging by class of financing receivable as of September 30, 2021 and December 31, 2020:


September 30, 2021	30-89 days past due		90 days or more and accruing interest		Non-accrual loans		Loans current on payments and accruing interest		Total
Commercial and industrial	$	1,400	$	126	$	2,896	$	1,248,003	$	1,252,425
Construction	2,078		1,057		3,851		1,183,637		1,190,623
Residential real estate:
1-to-4 family mortgage	5,233		6,989		4,936		1,157,997		1,175,155
Residential line of credit	1,132		—		1,269		390,039		392,440
Multi-family mortgage	—		—		50		324,612		324,662
Commercial real estate:
Owner occupied	565		—		6,239		931,437		938,241
Non-owner occupied	452		—		11,666		1,683,455		1,695,573
Consumer and other	4,542		729		3,219		317,065		325,555
Total	$	15,402	$	8,901	$	34,126	$	7,236,245	$	7,294,674


December 31, 2020	30-89 days past due		90 days or more and accruing interest		Non-accrual loans		Loans current on payments and accruing interest		Total
Commercial and industrial	$	3,297	$	330	$	16,005	$	1,326,490	$	1,346,122
Construction	7,607		573		4,053		1,209,987		1,222,220
Residential real estate:
1-to-4 family mortgage	7,058		10,470		5,923		1,065,819		1,089,270
Residential line of credit	3,551		239		1,757		402,664		408,211
Multi-family mortgage	—		57		—		175,619		175,676
Commercial real estate:
Owner occupied	98		—		7,948		916,795		924,841
Non-owner occupied	915		—		12,471		1,585,593		1,598,979
Consumer and other	4,469		2,027		2,603		308,541		317,640
Total	$	26,995	$	13,696	$	50,760	$	6,991,508	$	7,082,959

The following tables provide the amortized cost basis of loans on non-accrual status, as well as any related allowance as of September 30, 2021 and December 31, 2020 by class of financing receivable.



September 30, 2021	Non-accrual with no related allowance		Non-accrual with related allowance		Related allowance
Commercial and industrial	$	1,777	$	1,119	$	135
Construction	2,879		972		121
Residential real estate:
1-to-4 family mortgage	772		4,164		66
Residential line of credit	804		465		9
Multi-family mortgage	—		50		8
Commercial real estate:
Owner occupied	5,408		831		171
Non-owner occupied	6,279		5,387		641
Consumer and other	—		3,219		163
Total	$	17,919	$	16,207	$	1,314



December 31, 2020	Non-accrual with no related allowance		Non-accrual with related allowance		Related allowance

Commercial and industrial	$	13,960	$	2,045	$	383
Construction	3,061		992		131
Residential real estate:
1-to-4 family mortgage	3,048		2,875		84
Residential line of credit	854		903		31
Multi-family mortgage	—		—		—
Commercial real estate:
Owner occupied	7,172		776		63
Non-owner occupied	4,566		7,905		1,711
Consumer and other	—		2,603		147
Total	$	32,661	$	18,099	$	2,550

The following presents interest income recognized on nonaccrual loans during the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Commercial and industrial	$	190	$	287	$	523	$	304
Construction	75		42		105		48
Residential real estate:
1-to-4 family mortgage	114		15		199		21
Residential line of credit	197		72		242		72
Multi-family mortgage	—		—		2		—
Commercial real estate:
Owner occupied	187		32		419		75
Non-owner occupied	123		76		353		185
Consumer and other	75		—		130		24
Total	$	961	$	524	$	1,973	$	729

Accrued interest receivable written off as an adjustment to interest income amounted to $63 and $177 for the three months ended September 30, 2021 and 2020, respectively, and $660 and $459 for the nine months ended September 30, 2021 and 2020, respectively.

Troubled debt restructurings

As of September 30, 2021 and December 31, 2020, the Company had a recorded investment in TDRs of $29,645 and $15,988, respectively. The modifications included extensions of the maturity date and/or a stated rate of interest to one lower than the current market rate to borrowers experiencing financial difficulty. Of these loans, $10,628 and $8,279 were classified as non-accrual loans as of September 30, 2021 and December 31, 2020, respectively. The Company has calculated $1,007 and $310 in allowances for credit losses on TDRs as of September 30, 2021 and December 31, 2020, respectively. Unfunded loan commitments related to these loans totaled $422 as of September 30, 2021. There were no commitments to extend any additional funds on troubled debt restructurings as of December 31, 2020.

The following tables present the financial effect of TDRs recorded during the periods indicated.


Three Months Ended September 30, 2021	Number of loans	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Charge offs and specific reserves





Residential real estate:
1-to-4 family mortgage	1	$	134	$	134	$	—


Total	1	$	134	$	134	$	—


Nine Months Ended September 30, 2021	Number of loans	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Charge offs and specific reserves
Commercial and industrial	5	$	13,162	$	13,162	$	—

Commercial real estate:
Owner occupied	4	3,550		3,550		—
Non-owner occupied	1	11,997		11,997		—
Residential real estate:
1-to-4 family mortgage	3	945		945		—
Residential line of credit	1	11		11		—

Total	14	$	29,665	$	29,665	$	—


Three Months Ended September 30, 2020	Number of loans	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Charge offs and specific reserves
Commercial and industrial	2	$	420	$	420	$	—








Total	2	$	420	$	420	$	—


Nine Months Ended September 30, 2020	Number of loans	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Charge offs and specific reserves
Commercial and industrial	3	$	1,573	$	1,573	$	—

Commercial real estate:
Owner occupied	1	788		788
Non-owner occupied	2	3,752		3,752		—
Residential real estate:
1-4 family mortgage	2	77		77		—

Total	8	$	6,190	$	6,190	$	—

Troubled debt restructurings for which there was a payment default within twelve months following the modification totaled $305 during the three and nine months ended September 30, 2021. There were no such defaults during the three and nine months ended September 30, 2020. A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms.

In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy. The terms of certain other loans were modified during the three and nine months ended September 30, 2021 and 2020 that did not meet the definition of a TDR. The

modification of these loans usually involve either a modification of the terms of a loan to borrowers who are not experiencing financial difficulties or an insignificant delay in payments.

Collateral Dependent Loans

For loans for which the repayment (based on the Company's assessment) is expected to be provided substantially through the operation or sale of collateral and the borrower is experiencing financial difficulty, the following table presents the loans and the corresponding individually assessed allowance for credit losses by class of financing receivable. Significant changes in individually assessed reserves are due to changes in the valuation of the underlying collateral in addition to changes in accrual and past due status.


	September 30, 2021
	Type of Collateral
	Real Estate		Financial Assets and Equipment		Individually assessed allowance for credit loss
Commercial and industrial	$	635	$	2,166	$	123
Construction	4,597		—		112
Residential real estate:
1-to-4 family mortgage	375		—		—
Residential line of credit	1,123		—		7

Commercial real estate:
Owner occupied	7,808		—		167
Non-owner occupied	11,430		—		624
Consumer and other	26		—		2
Total	$	25,994	$	2,166	$	1,035


	December 31, 2020
	Type of Collateral
	Real Estate		Financial Assets and Equipment		Individually assessed allowance for credit loss
Commercial and industrial	$	—	$	1,728	$	117
Construction	3,877		—		—
Residential real estate:
1-to-4 family mortgage	226		—		—
Residential line of credit	1,174		—		9

Commercial real estate:
Owner occupied	3,391		—		30
Non-owner occupied	8,164		—		1,531

Total	$	16,832	$	1,728	$	1,687

Deferrals Program included in COVID-19 Relief

The following table outlines the Company's recorded investment and percentage of loans held for investment by class of financing receivable for executed deferrals remaining on deferral status as of September 30, 2021 or December 31, 2020, in connection with Company's COVID-19 relief programs. These deferrals typically ranged from sixty to ninety days per deferral and the majority were not considered TDRs under the interagency regulatory guidance or CARES Act, issued in March 2020. Section 541 of the Consolidated Appropriations Act extended this relief to the earlier of January 1, 2022 or 60 days after the national emergency termination date. As of September 30, 2021 and December 31, 2020, the Company had a recorded investment in loans totaling $1,331,538 and $1,399,088 previously deferred that were no longer in deferral status.


	September 30, 2021				December 31, 2020
				% of Loans					% of Loans
Commercial and industrial		$	—		—	%	$	7,118		0.5	%
Construction		—			—	%	1,918			0.2	%
Residential real estate:
1-to-4 family mortgage		—			—	%	19,201			1.8	%
Residential line of credit		—			—	%	204			—	%
Multi-family mortgage		—			—	%	3,305			1.9	%
Commercial real estate:
Owner occupied		—			—	%	19,815			2.1	%
Non-owner occupied		17,953			1.1	%	139,590			8.7	%
Consumer and other		—			—	%	11,366			3.6	%
Total		$	17,953		0.2	%	$	202,517		2.9	%

Other real estate owned

9 Months Ended

Sep. 30, 2021

Real Estate [Abstract]

Other real estate owned

The amount reported as other real estate owned includes property acquired through foreclosure in addition to excess facilities held for sale and is carried at fair value less estimated cost to sell the property. The following table summarizes the other real estate owned for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Balance at beginning of period	$	11,986	$	15,091	$	12,111	$	18,939
Transfers from loans	349		573		4,945		1,579
Transfers to premises and equipment	—		—		—		(841)

Proceeds from sale of other real estate owned	(4,173)		(1,411)		(8,834)		(5,561)
Gain on sale of other real estate owned	2,090		119		3,190		464
Loans provided for sales of other real estate owned	(152)		—		(685)		—
Write-downs and partial liquidations	(85)		(1,624)		(712)		(1,832)
Balance at end of period	$	10,015	$	12,748	$	10,015	$	12,748

Foreclosed residential real estate properties totaled $676 and $1,890 as of September 30, 2021 and December 31, 2020, respectively. The recorded investment in residential mortgage loans secured by residential real estate properties for which foreclosure proceedings are in process totaled $129 and $167 at September 30, 2021 and December 31, 2020, respectively.

Excess land and facilities held for sale resulting from branch consolidations totaled $3,501 and $5,703 as of September 30, 2021 and December 31, 2020, respectively.

Leases

9 Months Ended

Sep. 30, 2021

Leases [Abstract]

Leases

Leases:

As of September 30, 2021, the Company was the lessee in 55 operating leases and 1 finance lease of certain branch, mortgage and operations locations, of which 44 operating leases and 1 finance lease currently have remaining terms varying from greater than one year to 34 years. Leases with initial terms of less than one year are not recorded on the consolidated balance sheets. The Company also does not include equipment leases and leases in which the Company is the lessor on the consolidated balance sheets as these are insignificant.

Many leases include one or more options to renew, with renewal terms that can extend the lease up to an additional 20 years or more. Certain lease agreements contain provisions to periodically adjust rental payments for inflation. Renewal options that management is reasonably certain to renew and fixed rent escalations are included in the right-of-use asset and lease liability.

During the year ended December 31, 2020, the Company entered into a lease for a new corporate headquarters building located in downtown Nashville. The building is currently under construction and anticipated to be completed in late 2022.

Upon commencement, the Company estimates recording a ROU asset and operating lease liability of approximately $29,000 and $30,000, respectively, in connection with this lease.

Information related to the Company's leases is presented below as of September 30, 2021 and December 31, 2020:


		September 30,			December 31,
	Classification	2021			2020
Right-of-use assets:
Operating leases	Operating lease right-of-use assets	$	44,006		$	49,537
Finance leases	Premises and equipment, net	1,505			1,588
Total right-of-use assets		$	45,511		$	51,125
Lease liabilities:
Operating leases	Operating lease liabilities	$	48,875		$	55,187
Finance leases	Borrowings	1,532			1,598
Total lease liabilities		$	50,407		$	56,785
Weighted average remaining lease term (in years) - operating		12.4			12.2
Weighted average remaining lease term (in years) - finance		13.6			14.4
Weighted average discount rate - operating		2.72		%	2.65		%
Weighted average discount rate - finance		1.76		%	1.76		%

The components of total lease expense included in the consolidated statements of income were as follows:


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	Classification	2021		2020			2021		2020
Operating lease costs:
Amortization of right-of-use asset	Occupancy and equipment	$	1,838	$	1,663		$	5,948	$	4,341
Short-term lease cost	Occupancy and equipment	107		95			296		261
Variable lease cost	Occupancy and equipment	284		78			760		376

Gain on lease modifications and terminations	Occupancy and equipment	(14)		—			(801)		—
Finance lease costs:
Interest on lease liabilities	Interest expense on borrowings	7		—			21		—
Amortization of right-of-use asset	Occupancy and equipment	28		—			83		—
Total lease cost		$	2,250	$	1,836		$	6,307	$	4,978

During the three and nine months ended September 30, 2021, the Company recorded $14 and $801 in gains on lease modifications and terminations on certain vacated locations that were consolidated as a result of previous acquisitions. There was no such activity during the three and nine months ended September 30, 2021 and 2020.

The Company does not separate lease and non-lease components and instead elects to account for them as a single lease component. Variable lease cost primarily represents variable payments such as common area maintenance, utilities, and property taxes.

A maturity analysis of operating and finance lease liabilities and a reconciliation of undiscounted cash flows to the total lease liability as of September 30, 2021 is as follows:


	Operating		Finance
	Leases		Lease
Lease payments due:
September 30, 2022	$	7,434	$	116
September 30, 2023	6,110		117
September 30, 2024	5,180		119
September 30, 2025	4,765		121
September 30, 2026	4,637		123
Thereafter	29,784		1,133
Total undiscounted future minimum lease payments	57,910		1,729
Less: imputed interest	(9,035)		(197)
Lease liability	$	48,875	$	1,532

Leases

Leases:

As of September 30, 2021, the Company was the lessee in 55 operating leases and 1 finance lease of certain branch, mortgage and operations locations, of which 44 operating leases and 1 finance lease currently have remaining terms varying from greater than one year to 34 years. Leases with initial terms of less than one year are not recorded on the consolidated balance sheets. The Company also does not include equipment leases and leases in which the Company is the lessor on the consolidated balance sheets as these are insignificant.

Many leases include one or more options to renew, with renewal terms that can extend the lease up to an additional 20 years or more. Certain lease agreements contain provisions to periodically adjust rental payments for inflation. Renewal options that management is reasonably certain to renew and fixed rent escalations are included in the right-of-use asset and lease liability.

During the year ended December 31, 2020, the Company entered into a lease for a new corporate headquarters building located in downtown Nashville. The building is currently under construction and anticipated to be completed in late 2022.

Upon commencement, the Company estimates recording a ROU asset and operating lease liability of approximately $29,000 and $30,000, respectively, in connection with this lease.

Information related to the Company's leases is presented below as of September 30, 2021 and December 31, 2020:


		September 30,			December 31,
	Classification	2021			2020
Right-of-use assets:
Operating leases	Operating lease right-of-use assets	$	44,006		$	49,537
Finance leases	Premises and equipment, net	1,505			1,588
Total right-of-use assets		$	45,511		$	51,125
Lease liabilities:
Operating leases	Operating lease liabilities	$	48,875		$	55,187
Finance leases	Borrowings	1,532			1,598
Total lease liabilities		$	50,407		$	56,785
Weighted average remaining lease term (in years) - operating		12.4			12.2
Weighted average remaining lease term (in years) - finance		13.6			14.4
Weighted average discount rate - operating		2.72		%	2.65		%
Weighted average discount rate - finance		1.76		%	1.76		%

The components of total lease expense included in the consolidated statements of income were as follows:


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	Classification	2021		2020			2021		2020
Operating lease costs:
Amortization of right-of-use asset	Occupancy and equipment	$	1,838	$	1,663		$	5,948	$	4,341
Short-term lease cost	Occupancy and equipment	107		95			296		261
Variable lease cost	Occupancy and equipment	284		78			760		376

Gain on lease modifications and terminations	Occupancy and equipment	(14)		—			(801)		—
Finance lease costs:
Interest on lease liabilities	Interest expense on borrowings	7		—			21		—
Amortization of right-of-use asset	Occupancy and equipment	28		—			83		—
Total lease cost		$	2,250	$	1,836		$	6,307	$	4,978

During the three and nine months ended September 30, 2021, the Company recorded $14 and $801 in gains on lease modifications and terminations on certain vacated locations that were consolidated as a result of previous acquisitions. There was no such activity during the three and nine months ended September 30, 2021 and 2020.

The Company does not separate lease and non-lease components and instead elects to account for them as a single lease component. Variable lease cost primarily represents variable payments such as common area maintenance, utilities, and property taxes.

A maturity analysis of operating and finance lease liabilities and a reconciliation of undiscounted cash flows to the total lease liability as of September 30, 2021 is as follows:


	Operating		Finance
	Leases		Lease
Lease payments due:
September 30, 2022	$	7,434	$	116
September 30, 2023	6,110		117
September 30, 2024	5,180		119
September 30, 2025	4,765		121
September 30, 2026	4,637		123
Thereafter	29,784		1,133
Total undiscounted future minimum lease payments	57,910		1,729
Less: imputed interest	(9,035)		(197)
Lease liability	$	48,875	$	1,532

Mortgage servicing rights

9 Months Ended

Sep. 30, 2021

Transfers and Servicing of Financial Assets [Abstract]

Mortgage servicing rights

Mortgage servicing rights:

Changes in the Company’s mortgage servicing rights were as follows for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020


Carrying value at beginning of period	$	101,615	$	60,508	$	79,997	$	75,521
Capitalization	9,215		18,202		31,382		33,415

Mortgage servicing rights acquired from Franklin, at fair value	—		4,850		—		4,850



Change in fair value:
Due to pay-offs/pay-downs	(7,302)		(7,756)		(24,488)		(19,676)
Due to change in valuation inputs or assumptions	7,063		581		23,700		(22,575)
Carrying value at end of period	$	110,591	$	71,535	$	110,591	$	71,535

The following table summarizes servicing income and expense, which are included in 'Mortgage banking income' and 'Other noninterest expense', respectively, within the Mortgage segment operating results for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Servicing income:
Servicing income	$	7,539	$	5,536	$	21,258	$	15,667
Change in fair value of mortgage servicing rights	(239)		(7,175)		(788)		(42,251)
Change in fair value of derivative hedging instruments	(2,128)		(265)		(9,987)		15,705
Servicing income (loss)	5,172		(1,904)		10,483		(10,879)
Servicing expenses	2,156		1,999		7,381		5,392
Net servicing income (loss)(1)	$	3,016	$	(3,903)	$	3,102	$	(16,271)

(1) Excludes benefit of custodial servicing related noninterest-bearing deposits held by the Bank.

Data and key economic assumptions related to the Company’s mortgage servicing rights as of September 30, 2021 and December 31, 2020 are as follows:


	September 30,			December 31,
	2021			2020
Unpaid principal balance	$	10,633,805		$	9,787,657
Weighted-average prepayment speed (CPR)	9.46		%	14.07		%
Estimated impact on fair value of a 10% increase	$	(4,737)		$	(4,493)
Estimated impact on fair value of a 20% increase	$	(9,107)		$	(8,599)
Discount rate	11.56		%	11.49		%
Estimated impact on fair value of a 100 bp increase	$	(4,454)		$	(2,942)
Estimated impact on fair value of a 200 bp increase	$	(8,571)		$	(5,674)
Weighted-average coupon interest rate	3.29		%	3.58		%
Weighted-average servicing fee (basis points)	27			28
Weighted-average remaining maturity (in months)	330			328

The Company hedges the mortgage servicing rights portfolio with various derivative instruments to offset changes in the fair value of the related mortgage servicing rights. See Note 10, "Derivatives" for additional information on these hedging instruments.

As of September 30, 2021 and December 31, 2020, mortgage escrow deposits totaled to $190,631 and $147,957, respectively.

- Definition

The entire disclosure for a transferor's continuing involvement in financial assets that it has transferred in a securitization or asset-backed financing arrangement, the nature of any restrictions on assets reported by an entity in its statement of financial position that relate to a transferred financial asset (including the carrying amounts of such assets), how servicing assets and servicing liabilities are reported, and (for securitization or asset-backed financing arrangements accounted for as sales) when a transferor has continuing involvement with the transferred financial assets and transfers of financial assets accounted for as secured borrowings, how the transfer of financial assets affects an entity's financial position, financial performance, and cash flows.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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-Paragraph 1A
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Income taxes

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Income taxes

Income taxes:

An allocation of federal and state income taxes between current and deferred portions is presented below:


	Three Months Ended September 30,
	2021		2020
Current	$	2,350	$	13,123
Deferred	7,366		(15,163)
Total	$	9,716	$	(2,040)

	Nine Months Ended September 30,
	2021		2020
Current	$	17,840	$	37,038
Deferred	20,904		(31,543)
Total	$	38,744	$	5,495

The following table presents a reconciliation of federal income taxes at the statutory federal rate of 21% to the Company's effective tax rates for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,
	2021				2020
Federal taxes calculated at statutory rate	$	11,551	21.0	%	$	(1,604)	21.0	%
Increase (decrease) resulting from:
State taxes, net of federal benefit	3,279		6.0	%	100		(1.3)	%


(Benefit) expense from equity based compensation	(1,784)		(3.2)	%	(7)		0.1	%
Municipal interest income, net of interest disallowance	(416)		(0.8)	%	(422)		5.5	%
Bank owned life insurance	(74)		(0.1)	%	(55)		0.7	%
NOL Carryback provision under CARES Act	(3,424)		(6.2)	%
Merger and offering costs	—		—	%	126		(1.6)	%
Section 162(m) limitation	1,065		1.9	%	—		—	%
Other	(481)		(0.9)	%	(178)		2.3	%
Income tax expense, as reported	$	9,716	17.7	%	$	(2,040)	26.7	%

	Nine Months Ended September 30,
	2021				2020
Federal taxes calculated at statutory rate	$	37,844	21.0	%	$	4,938	21.0	%
Increase (decrease) resulting from:
State taxes, net of federal benefit	6,908		3.8	%	1,266		5.4	%
(Benefit) expense from equity based compensation	(2,129)		(1.2)	%	154		0.7	%
Municipal interest income, net of interest disallowance	(1,259)		(0.7)	%	(996)		(4.2)	%
Bank owned life insurance	(240)		(0.1)	%	(90)		(0.4)	%
NOL Carryback provision under CARES Act	(3,424)		(1.9)	%
Merger and offering costs	127		0.1	%	289		1.2	%
Section 162(m) limitation	1,313		0.7	%			—	%
Other	(396)		(0.2)	%	(66)		(0.3)	%
Income tax expense, as reported	$	38,744	21.5	%	$	5,495	23.4	%

The Company is subject to Internal Revenue Code Section 162(m), which limits the deductibility of compensation paid to certain individuals. The restricted stock unit plans that existed prior to the corporation being public vested after the reliance period as defined in the underlying Treasury Regulations. It is the Company’s policy to apply the Section 162(m) limitations to stock-based compensation first and then followed by cash compensation. As a result of the vesting of these units and cash compensation paid to date, the Company has disallowed a portion of its compensation paid to the applicable individuals.

The components of the net deferred tax assets at September 30, 2021 and December 31, 2020, are as follows:


	September 30,		December 31
	2021		2020
Deferred tax assets:
Allowance for credit losses	$	38,751	$	48,409
Operating lease liabilities	13,134		14,496
Federal net operating loss	1,541		1,753

Deferred compensation	6,798		8,872


Unrealized loss on cash flow hedges	326		499
Other	13,886		19,101
Subtotal	74,436		93,130
Deferred tax liabilities:
FHLB stock dividends	$	(484)	$	(561)
Operating leases - right of use assets	(11,726)		(13,197)
Depreciation	(7,276)		(7,491)
Amortization of core deposit intangibles	(200)		(684)
Unrealized gain on equity securities	(3,879)		(17)

Unrealized gain on debt securities	(3,913)		(13,027)
Mortgage servicing rights	(28,774)		(20,803)
Goodwill	(13,133)		(11,301)
Other	(4,407)		(9,653)
Subtotal	(73,792)		(76,734)
Net deferred tax assets	$	644	$	16,396

The Company has net operating loss carryforward acquired from Franklin of $7,338 as of September 30, 2021. The net operating loss carryforward can be used to offset taxable income in future periods and reduce income tax liabilities in those future periods. While net operating losses are subject to certain annual utilization limits under Section 382, the Company believes the net operating loss carryforward will be realized based on the projected annual limitation and the length of the net operating loss carryover period. The Company's determination of the realization of the net deferred tax asset is based on its assessment of all available positive and negative evidence. The net operating loss carryforward expires on December 31, 2029.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Commitments and contingencies

9 Months Ended

Sep. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and contingencies

Commitments and contingencies:

Some financial instruments, such as loan commitments, credit lines, letters of credit, and overdraft protection, are issued to meet customer financing needs. These are agreements to provide credit or to support the credit of others, as long as conditions established in the contract are met, and usually have expiration dates.

Commitments may expire without being used. Off-balance sheet risk of credit loss exists up to the face amount of these instruments, although material losses are not anticipated. The same credit policies are used to make such commitments as are used for loans, including obtaining collateral at exercise of the commitment.


	September 30,		December 31,
	2021		2020
Commitments to extend credit, excluding interest rate lock commitments	$	2,826,186	$	2,719,996
Letters of credit	63,698		67,598
Balance at end of period	$	2,889,884	$	2,787,594

As of September 30, 2021 and December 31, 2020, loan commitments included above with floating interest rates totaled $2.03 billion and $1.65 billion, respectively.

The Company estimates expected credit losses on off-balance sheet loan commitments that are not accounted for as derivatives. When applying the CECL methodology to estimate expected credit loss, the Company considers the likelihood that funding will occur, the contractual period of exposure to credit loss, the risk of loss, historical loss experience, and current conditions along with expectations of future economic conditions.

The table below presents activity within the allowance for credit losses on unfunded commitments included in accrued expenses and other liabilities on the Company's consolidated balance sheets for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Balance at beginning of period	$	13,202	$	6,500	$	16,378	$	—
Impact of CECL adoption on provision for credit losses on unfunded commitments	—		—		—		2,947
Increase in provision for credit losses from unfunded commitments acquired in business combination	—		10,429		—		10,499
Provision for credit losses on unfunded commitments	301		(862)		(2,875)		2,621
Balance at end of period	$	13,503	$	16,067	$	13,503	$	16,067

In connection with the sale of mortgage loans to third party investors, the Company makes usual and customary representations and warranties as to the propriety of its origination activities. Occasionally, the investors require the Company to repurchase loans sold to them under the terms of the warranties. When this happens, the loans are recorded at fair value with a corresponding charge to a valuation reserve. The total principal amount of loans repurchased (or indemnified for) was $2,917 and $4,386 for the three and nine months ended September 30, 2021, respectively and $1,329 and $5,696 for the three and nine months ended September 30, 2020, respectively. The Company has established a reserve associated with loan repurchases.

The following table summarizes the activity in the repurchase reserve included in accrued expenses and other liabilities on the Company's consolidated balance sheets:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Balance at beginning of period	$	5,489	$	4,601	$	5,928	$	3,529
Provision for loan repurchases or indemnifications	—		901		(266)		2,128

Losses on loans repurchased or indemnified	(120)		(44)		(293)		(199)
Balance at end of period	$	5,369	$	5,458	$	5,369	$	5,458

Derivatives

9 Months Ended

Sep. 30, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives

Derivatives:

The Company utilizes derivative financial instruments as part of its ongoing efforts to manage its interest rate risk exposure as well as the exposure for its customers. Derivative financial instruments are included in the consolidated balance sheets line item “Other assets” or “Other liabilities” at fair value in accordance with ASC 815, “Derivatives and Hedging.”

The Company enters into commitments to originate loans whereby the interest rate on the loan is determined prior to funding (rate-lock commitments). Under such commitments, interest rates for mortgage loans are typically locked in for between 45 to 90 days with the customer. These interest rate lock commitments are recorded at fair value in the Company’s consolidated balance sheets. The Company also enters into best effort or mandatory delivery forward commitments to sell residential mortgage loans to secondary market investors. Gains and losses arising from changes in the valuation of the rate-lock commitments and forward commitments are recognized currently in earnings and are reflected under the line item “Mortgage banking income” on the consolidated statements of income.

The Company enters into forward commitments, futures and options contracts that are not designated as hedging instruments as economic hedges to offset the changes in fair value of Mortgage servicing rights. Gains and losses associated with these instruments are included in earnings and are reflected under the line item “Mortgage banking income” on the consolidated statements of income.

Additionally, the Company enters into derivative instruments that are not designated as hedging instruments to help its commercial customers manage their exposure to interest rate fluctuations. To mitigate the interest rate risk associated with customer contracts, the Company enters into an offsetting derivative contract. The Company manages its credit risk, or potential risk of default by its commercial customers through credit limit approval and monitoring procedures.

The Company also maintains two interest rate swap agreements with notional amounts totaling $30,000 used to hedge interest rate exposure on outstanding subordinated debentures included in long-term debt totaling $30,930. Under these agreements, the Company receives a variable rate of interest equal to 3-month LIBOR and pays a weighted average fixed rate of interest of 2.08%. The interest rate swap contracts, which mature in June of 2024, are designated as cash flow hedges with the objective of reducing the variability in cash flows resulting from changes in interest rates. As of September 30, 2021 and December 31, 2020, the fair value of these contracts resulted in liability balances of $1,247 and $1,909, respectively.

In July 2017, the Company entered into three interest rate swap contracts to hedge the variability of cash flows associated with the Company’s FHLB borrowings. These swaps were canceled during the year ended December 31, 2018, locking in a tax-adjusted gain of $1,564 in other comprehensive income to be accreted over the terms of the underlying contracts. The advances associated with the legacy cash flow hedge matured during the year ended December 31, 2020, and the Company elected not to renew them. As such, during the fourth quarter of 2020, the remaining unamortized gain was reclassified from accumulated other comprehensive income to earnings.

The following tables provide details on the Company’s derivative financial instruments as of the dates presented:


	September 30, 2021
	Notional Amount		Asset		Liability
Not designated as hedging:
Interest rate contracts	$	611,188	$	22,456	$	22,301
Forward commitments	1,404,819		6,526		—
Interest rate-lock commitments	738,201		9,804		—
Futures contracts	491,800		—		4,758

Total	$	3,246,008	$	38,786	$	27,059


	December 31, 2020
	Notional Amount		Asset		Liability
Not designated as hedging:
Interest rate contracts	$	606,878	$	34,547	$	34,317
Forward commitments	1,358,328		—		11,633
Interest rate-lock commitments	1,191,621		34,391		—
Futures contracts	375,400		—		383

Total	$	3,532,227	$	68,938	$	46,333


	September 30, 2021
	Notional Amount		Asset		Liability
Designated as hedging:
Interest rate swaps	$	30,000	$	—	$	1,247


	December 31, 2020
	Notional Amount		Asset		Liability
Designated as hedging:
Interest rate swaps	$	30,000	$	—	$	1,909

Gains (losses) included in the consolidated statements of income related to the Company’s derivative financial instruments were as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Not designated as hedging instruments (included in mortgage banking income):
Interest rate lock commitments	$	(3,316)	$	5,994	$	(24,587)	$	35,997
Forward commitments	(806)		(16,548)		23,252		(56,998)
Futures contracts	(2,152)		(587)		(9,380)		10,955

Total	$	(6,274)	$	(11,141)	$	(10,715)	$	(10,046)


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Designated as hedging:
Amount of gain reclassified from other comprehensive income and recognized in interest expense on borrowings, net of taxes of $0, $41, $0, and $145	$	—	$	115	$	—	$	410
Loss included in interest expense on borrowings	(148)		(137)		(428)		(211)
Total	$	(148)	$	(22)	$	(428)	$	199

The following discloses the amount included in other comprehensive income, net of tax, for derivative instruments designated as cash flow hedges for the periods presented:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Designated as hedging:
Amount of gain (loss) recognized in other comprehensive income, net of tax $38, $40, $173, and $(403)	$	106	$	112	$	489	$	(1,145)

Certain financial instruments, including derivatives, may be eligible for offset in the consolidated balance sheets when the “right of offset” exists or when the instruments are subject to an enforceable master netting agreement, which includes the right of the non-defaulting party or non-affected party to offset recognized amounts, including collateral posted with the counterparty, to determine a net receivable or net payable upon early termination of the agreement. Certain of the Company’s derivative instruments are subject to master netting agreements, however the Company has not elected to offset such financial instruments in the consolidated balance sheets. The following table presents the Company's gross derivative positions as recognized in the consolidated balance sheets as well as the net derivative positions, including collateral pledged to the extent the application of such collateral did not reduce the net derivative liability position below zero, had the Company elected to offset those instruments subject to an enforceable master netting agreement:


	Offsetting Derivative Assets				Offsetting Derivative Liabilities
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Gross amounts recognized	$	4,813	$	3,863	$	19,467	$	34,051
Gross amounts offset in the consolidated balance sheets	—		—		—		—
Net amounts presented in the consolidated balance sheets	4,813		3,863		19,467		34,051

Gross amounts not offset in the consolidated balance sheets
Less: financial instruments	3,816		857		3,816		857
Less: financial collateral pledged	—		—		15,651		33,194
Net amounts	$	997	$	3,006	$	—	$	—

Most derivative contracts with clients are secured by collateral. Additionally, in accordance with the interest rate agreements with derivatives dealers, the Company may be required to post margin to these counterparties. At September 30, 2021 and December 31, 2020, the Company had minimum collateral posting thresholds with certain derivative counterparties and had collateral posted of $68,910 and $57,985, respectively, against its obligations under these agreements. Cash collateral related to derivative contracts is recorded in other assets in the consolidated balance sheets.

Fair value of financial instruments

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Fair value of financial instruments

Fair value of financial instruments:FASB ASC 820-10 defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820-10 also establishes a framework for measuring the fair value of assets and liabilities according to a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets and liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The hierarchy maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that are derived from assumptions based on management’s estimate of assumptions that market participants would use in pricing the asset or liability based on the best information available under the circumstances.

The hierarchy is broken down into the following three levels, based on the reliability of inputs:

Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities that are accessible at the measurement date.

Level 2: Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data.

Level 3: Significant unobservable inputs for assets or liabilities that are derived from assumptions based on management’s estimate of assumptions that market participants would use in pricing the assets or liabilities.

The Company records the fair values of financial assets and liabilities on a recurring and non-recurring basis using the following methods and assumptions:


Investment Securities						Investment securities are recorded at fair value on a recurring basis. Fair values for securities are based on quoted market prices, where available. If quoted prices are not available, fair values are based on quoted market prices of similar instruments or are determined by matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the pricing relationship or correlation among other benchmark quoted securities. Investment securities valued using quoted market prices of similar instruments or that are valued using matrix pricing are classified as Level 2. When significant inputs to the valuation are unobservable, the available-for-sale securities are classified within Level 3 of the fair value hierarchy. Where no active market exists for a security or other benchmark securities, fair value is estimated by the Company with reference to discount margins for other high-risk securities.

Loans held for sale						Loans held for sale are carried at fair value. Fair value is determined using current secondary market prices for loans with similar characteristics for the mortgage portfolio, that is, using Level 2 inputs. Commercial loans held for sale's fair value is determined using an income approach with various assumptions including expected cash flows, market discount rates, credit metrics and collateral value when appropriate. As such, these are considered Level 3.

Derivatives						The fair value of the Company's interest rate swaps are based upon fair values provided from entities that engage in interest rate swap activity and is based upon projected future cash flows and interest rates. Fair value of commitments is based on fees currently charged to enter into similar agreements, and for fixed-rate commitments, the difference between current levels of interest rates and the committed rates is also considered. These financial instruments are classified as Level 2.

OREO						OREO is comprised of commercial and residential real estate obtained in partial or total satisfaction of loan obligations and excess land and facilities held for sale. OREO acquired in settlement of indebtedness is recorded at the lower of the carrying amount of the loan or the fair value of the real estate less costs to sell. Fair value is determined on a nonrecurring basis based on appraisals by qualified licensed appraisers and is adjusted for management’s estimates of costs to sell and holding period discounts. The valuations are classified as Level 3.

Mortgage servicing rights						MSRs are carried at fair value. Fair value is determined using an income approach with various assumptions including expected cash flows, market discount rates, prepayment speeds, servicing costs, and other factors. As such, MSRs are considered Level 3.

Collateral dependent loans						Collateral dependent loans are loans for which, based on current information and events, the Company has determined foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and the Company expects repayment of the loan to be provided substantially through the operation or sale of the collateral and it is probable that the creditor will be unable to collect all amounts due according to the contractual terms of the loan agreement. Collateral dependent loans are classified as Level 3.

The following table contains the estimated fair values and the related carrying values of the Company's financial instruments. Items which are not financial instruments are not included.


	Fair Value
September 30, 2021	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	1,324,564	$	1,324,564	$	—	$	—	$	1,324,564
Investment securities	1,577,337		—		1,577,337		—		1,577,337

Loans, net	7,155,228		—		—		7,255,887		7,255,887
Loans held for sale	855,706		—		755,210		100,496		855,706
Interest receivable	41,393		30		6,448		34,915		41,393
Mortgage servicing rights	110,591		—		—		110,591		110,591
Derivatives	38,786		—		38,786		—		38,786
Financial liabilities:
Deposits:
Without stated maturities	$	8,884,429	$	8,884,429	$	—	$	—	$	8,884,429
With stated maturities	1,187,489		—		1,196,141		—		1,196,141
Securities sold under agreement to repurchase and federal funds sold	41,730		41,730		—		—		41,730

Subordinated debt	129,448		—		—		134,668		134,668
Other borrowings	1,532		—		1,532		—		1,532
Interest payable	2,394		138		1,873		383		2,394
Derivatives	28,306		—		28,306		—		28,306


	Fair Value
December 31, 2020	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	1,317,898	$	1,317,898	$	—	$	—	$	1,317,898
Investment securities	1,176,991		—		1,176,991		—		1,176,991

Loans, net	6,912,570		—		—		7,058,693		7,058,693
Loans held for sale	899,173		—		683,770		215,403		899,173
Interest receivable	43,603		33		5,254		38,316		43,603
Mortgage servicing rights	79,997		—		—		79,997		79,997
Derivatives	68,938		—		68,938		—		68,938
Financial liabilities:
Deposits:
Without stated maturities	$	8,020,783	$	8,020,783	$	—	$	—	$	8,020,783
With stated maturities	1,437,254		—		1,446,605		—		1,446,605
Securities sold under agreement to repurchase and federal funds sold	32,199		32,199		—		—		32,199

Subordinated debt	189,527		—		—		192,149		192,149
Other borrowings	16,598		—		16,598		—		16,598
Interest payable	6,772		327		4,210		2,235		6,772
Derivatives	48,242		—		48,242		—		48,242

The balances and levels of the assets measured at fair value on a recurring basis at September 30, 2021 are presented in the following table:


At September 30, 2021	Quoted prices in active markets for identical assets (liabilities) (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)		Total
Recurring valuations:
Financial assets:
Available-for-sale securities:
U.S. government agency securities	$	—	$	10,571	$	—	$	10,571
Mortgage-backed securities - residential	—		1,210,503		—		1,210,503
Mortgage-backed securities - commercial	—		15,712		—		15,712
Municipal securities	—		327,239		—		327,239
Treasury securities	—		6,006		—		6,006
Corporate securities	—		2,527		—		2,527
Equity securities	—		4,779		—		4,779
Total securities	$	—	$	1,577,337	$	—	$	1,577,337
Loans held for sale	—		755,210		100,496		855,706
Mortgage servicing rights	—		—		110,591		110,591
Derivatives	—		38,786		—		38,786
Financial Liabilities:
Derivatives	—		28,306		—		28,306

The balances and levels of the assets measured at fair value on a non-recurring basis at September 30, 2021 are presented in the following table:


At September 30, 2021	Quoted prices in active markets for identical assets (liabilities (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)		Total
Non-recurring valuations:
Financial assets:
Other real estate owned	$	—	$	—	$	6,192	$	6,192
Collateral dependent loans:
Commercial and industrial	$	—	$	—	$	101	$	101
Construction	—		—		606		606
Residential real estate:

Residential line of credit	—		—		311		311

Commercial real estate:
Owner occupied	—		—		315		315
Non-owner occupied	—		—		4,527		4,527
Consumer and other	—		—		24		24
Total collateral dependent loans	$	—	$	—	$	5,884	$	5,884

The balances and levels of the assets measured at fair value on a recurring basis at December 31, 2020 are presented in the following table:


At December 31, 2020	Quoted prices in active markets for identical assets (liabilities) (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)		Total
Recurring valuations:
Financial assets:
Available-for-sale securities:
U.S. government agency securities	$	—	$	2,003	$	—	$	2,003
Mortgage-backed securities - residential	—		773,336		—		773,336
Mortgage-backed securities - commercial	—		21,588		—		21,588
Municipals, tax-exempt	—		356,329		—		356,329
Treasury securities	—		16,628		—		16,628
Corporate securities	—		2,516		—		2,516
Equity securities	—		4,591		—		4,591
Total securities	$	—	$	1,176,991	$	—	$	1,176,991
Loans held for sale	$	—	$	683,770	$	215,403	$	899,173
Mortgage servicing rights	—		—		79,997		79,997
Derivatives	—		68,938		—		68,938
Financial Liabilities:
Derivatives	—		48,242		—		48,242

The balances and levels of the assets measured at fair value on a non-recurring basis at December 31, 2020 are presented in the following table:


At December 31, 2020	Quoted prices in active markets for identical assets (liabilities) (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)		Total
Non-recurring valuations:
Financial assets:
Other real estate owned	$	—	$	—	$	6,662	$	6,662
Collateral dependent loans:
Commercial and industrial	$	—	$	—	$	684	$	684

Residential real estate:

Residential line of credit	—		—		311		311
Commercial real estate:
Owner occupied	—		—		136		136
Non-owner occupied	—		—		5,022		5,022

Total collateral dependent loans	$	—	$	—	$	6,153	$	6,153

The following tables present information as of September 30, 2021 and December 31, 2020 about significant unobservable inputs (Level 3) used in the valuation of assets measured at fair value on a nonrecurring basis:

As of September 30, 2021

Financial instrument

Fair Value

Valuation technique

Significant
unobservable inputs

Range of
inputs

Collateral dependent loans

$

5,884

Valuation of collateral

Discount for comparable sales

0%-30%

Other real estate owned

$

6,192

Appraised value of property less costs to sell

Discount for costs to sell

0%-15%

As of December 31, 2020

Financial instrument

Fair Value

Valuation technique

Significant
unobservable inputs

Range of
inputs

Collateral dependent loans

$

6,153

Valuation of collateral

Discount for comparable sales

0%-30%

Other real estate owned

$

6,662

Appraised value of property less costs to sell

Discount for costs to sell

0%-15%

For collateral dependent loans, the ACL is measured based on the difference between the fair value of the collateral and the amortized cost basis of the loan as of the measurement date. Fair value of the loan's collateral is determined by third-party appraisals, which are then adjusted for the estimated selling and closing costs related to liquidation of the collateral. Collateral dependent loans are reviewed and evaluated on at least a quarterly basis for additional impairment and adjusted accordingly, based on changes in market conditions from the time of valuation and management's knowledge of the client and client's business. As of September 30, 2021 and December 31, 2020, total amortized cost of collateral dependent loans measured on a non-recurring basis amounted to $6,918 and $7,839, respectively.

Other real estate owned acquired in settlement of indebtedness is recorded at fair value of the real estate less estimated costs to sell. Subsequently, it may be necessary to record nonrecurring fair value adjustments for declines in fair value. Any write-downs based on the asset's fair value at the date of foreclosure are charged to the allowance for credit losses. Appraisals for both collateral dependent loans and other real estate owned are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. Once received, a member of the lending administrative department reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry wide statistics. Collateral dependent loans that are dependent on recovery through sale of equipment, such as farm equipment, automobiles and aircrafts are generally valued based on public source pricing or subscription services while more complex assets are valued through leveraging brokers who have expertise in the collateral involved.

Fair value option

The following table summarizes the Company's loans held for sale, at fair value, as of the dates presented:


	September 30,		December 31,
	2021		2020
Commercial and industrial	$	100,496	$	215,403
Residential real estate:
1-4 family mortgage	755,210		683,770
Total loans held for sale	$	855,706	$	899,173

Mortgage loans held for sale

The Company measures mortgage loans originated for sale at fair value under the fair value option as permitted under ASC 825, "Financial Instruments" ("ASC 825"). Electing to measure these assets at fair value reduces certain timing differences and more accurately matches the changes in fair value of the loans with changes in the fair value of derivative instruments used to economically hedge them.

Net losses of $3,908 and $14,894 resulting from fair value changes of mortgage loans were recorded in income during the three and nine months ended September 30, 2021, respectively, compared to net gains of $20,378 and $6,512 during the three and nine months ended September 30, 2020, respectively. The amount does not reflect changes in fair values of related derivative instruments used to hedge exposure to market-related risks associated with these mortgage loans. The change in fair value of both loans held for sale and the related derivative instruments are recorded in Mortgage Banking Income in the consolidated statements of income. Election of the fair value option allows the Company to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the financial instruments at the lower of cost or fair value and the derivatives at fair value.

Government National Mortgage Association optional repurchase programs allow financial institutions to buy back

individual delinquent mortgage loans that meet certain criteria from the securitized loan pool for which the institution provides servicing and was the original transferor. At the servicer’s option and without GNMA’s prior authorization, the servicer may repurchase such a delinquent loan for an amount equal to 100 percent of the remaining principal balance of the loan. Under FASB ASC Topic 860, “Transfers and Servicing,” this buy-back option is considered a conditional option

until the delinquency criteria are met, at which time the option becomes unconditional. When the Company is deemed to have regained effective control over these loans under the unconditional buy-back option, the loans can no longer be reported as sold and must be brought back onto the balance sheet, regardless of whether the Company intends to exercise the buy-back option if the buyback option provides the transferor a more-than-trivial benefit. As of September 30, 2021, and December 31, 2020, there were $105,094 and $151,184, respectively, of delinquent GNMA loans previously sold that the Company did not record on its consolidated balance sheets as the Company determined there not to be a more-than-trivial benefit based on an analysis of interest rates and an assessment of potential reputational risk associated with these loans.

The Company’s valuation of mortgage loans held for sale incorporates an assumption for credit risk; however, given the short-term period that the Company holds these mortgage loans held for sale, valuation adjustments attributable to instrument-specific credit risk is nominal.

Commercial loans held for sale

The Company also has a portfolio of shared national credits and institutional healthcare loans that were acquired during 2020 in the acquisition of Franklin. These commercial loans are also being measured under the fair value option. As such, these loans are excluded from the allowance for credit losses. The following table sets forth the changes in fair value associated with this portfolio.


	Three Months Ended September 30, 2021
	Principal Balance		Fair Value Discount		Fair Value
Carrying value at beginning of period	$	135,972	$	(11,850)	$	124,122
Change in fair value:
Pay-downs and pay-offs	(24,366)		—		(24,366)

Changes in valuation included in other noninterest income	—		740		740
Carrying value at end of period	$	111,606	$	(11,110)	$	100,496

	Nine Months Ended September 30, 2021
	Principal Balance		Fair Value Discount		Fair Value
Carrying value at beginning of period	$	239,063	$	(23,660)	$	215,403
Change in fair value:
Pay-downs and pay-offs	(116,158)		—		(116,158)
Write-offs to discount	(11,299)		11,299		—
Changes in valuation included in other noninterest income	—		1,251		1,251
Carrying value at end of period	$	111,606	$	(11,110)	$	100,496

	Three Months Ended September 30, 2020
	Principal balance		Fair Value discount		Fair Value
Carrying value at beginning of period	$	—	$	—	$	—
Commercial loans held for sale acquired from Franklin	350,269		(24,063)		326,206
Change in fair value:
Pay-downs and pay-offs	(86,808)		—		(86,808)

Changes in valuation included in other noninterest income			1,858		1,858
Carrying value at end of period	$	263,461	$	(22,205)	$	241,256


	Nine Months ended September 30, 2020
	Principal balance		Fair Value discount		Fair Value
Carrying value at beginning of period	$	—	$	—	$	—
Commercial loans held for sale acquired from Franklin	350,269		(24,063)		326,206
Change in fair value:
Pay-downs and pay-offs	(86,808)		—		(86,808)

Changes in valuation included in other noninterest income	—		1,858		1,858
Carrying value at end of period	$	263,461	$	(22,205)	$	241,256

Interest income on loans held for sale measured at fair value is accrued as it is earned based on contractual rates and is reflected in loan interest income in the consolidated statements of income.

The following table summarizes the differences between the fair value and the principal balance for loans held for sale and nonaccrual loans measured at fair value as of September 30, 2021 and December 31, 2020:


September 30, 2021	Aggregate fair value		Aggregate Unpaid Principal Balance		Difference
Mortgage loans held for sale measured at fair value	$	755,210	$	738,221	$	16,989
Commercial loans held for sale measured at fair value	94,871		100,914		(6,043)

Nonaccrual loans	5,625		10,692		(5,067)

December 31, 2020
Mortgage loans held for sale measured at fair value	$	683,770	$	651,887	$	31,883
Commercial loans held for sale measured at fair value	208,914		226,867		(17,953)
Past due loans of 90 days or more	83		163		(80)
Nonaccrual loans	6,406		12,033		(5,627)

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Segment reporting

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Segment reporting

Segment reporting:

The Company and the Bank are engaged in the business of banking and provide a full range of financial services. The Company determines reportable segments based on the significance of the segment’s operating results to the overall Company, the products and services offered, customer characteristics, processes and service delivery of the segments and the regular financial performance review and allocation of resources by the Chief Executive Officer, the Company’s chief operating decision maker. The Company has identified two distinct reportable segments—Banking and Mortgage. The Company’s primary segment is Banking, which provides a full range of deposit and lending products and services to corporate, commercial and consumer customers. The Company offers full-service conforming residential mortgage products, including conforming residential loans and services through two distinct delivery channels: retail and ConsumerDirect. Additionally, the Mortgage segment includes the servicing of residential mortgage loans and the packaging and securitization of loans to governmental agencies. The Company’s mortgage division represents a distinct reportable segment which differs from the Company’s primary business of commercial and retail banking.

As previously reported, on March 31, 2021, the Company re-evaluated its business segments and revised to align all mortgage activities with the Mortgage segment. Previously, the Company had attributed retail mortgage activities originating from geographical locations within the footprint of the Company's branches to the Banking segment. Results for the comparable prior period have been revised to reflect this realignment. The impact of this change on previously reported segment results was the reclassification of mortgage retail footprint total net contribution of $9,508 and $18,382 from the Banking segment to the Mortgage segment for the three and nine months ended September 30, 2020, respectively.

The financial performance of the Mortgage segment is assessed based on results of operations reflecting direct revenues and expenses and allocated expenses. This approach gives management a better indication of the operating performance of the segment. When assessing the Banking segment’s financial performance, the CEO utilizes reports with indirect revenues and expenses including but not limited to the investment portfolio, electronic delivery channels and areas that primarily support the banking segment operations. Therefore, these are included in the results of the Banking segment. Other indirect revenue and expenses related to general administrative areas are also included in the internal financial results reports of the Banking segment utilized by the CEO for analysis and are thus included for Banking segment reporting. The Mortgage segment utilizes funding sources from the Banking segment in order to fund mortgage loans that are ultimately sold on the secondary market. The Mortgage segment uses the proceeds from loan sales to repay obligations due to the Banking segment.

The following tables provide segment financial information for three and nine months ended September 30, 2021 and 2020 as follows:


Three Months Ended September 30, 2021	Banking		Mortgage		Consolidated
Net interest income	$	88,576	$	(100)	$	88,476
Provisions for credit losses(1)	(2,531)		—		(2,531)
Mortgage banking income(2)	—		47,751		47,751
Change in fair value of mortgage servicing rights, net of hedging(2)	—		(2,367)		(2,367)
Other noninterest income	13,823		(201)		13,622
Depreciation and amortization	1,791		349		2,140
Amortization of intangibles	1,344		—		1,344

Other noninterest expense	55,642		35,881		91,523
Income before income taxes	$	46,153	$	8,853	$	55,006
Income tax expense					9,716
Net income applicable to FB Financial Corporation and noncontrolling interest					45,290
Net income applicable to noncontrolling interest(3)					—
Net income applicable to FB Financial Corporation					$	45,290
Total assets	$	10,712,281	$	1,098,009	$	11,810,290
Goodwill	242,561		—		242,561

(1)Included $301 in provision for credit losses on unfunded commitments.

(2)Change in fair value of mortgage servicing rights, net of hedging is included in mortgage banking income in the Company's consolidated statements of income.

(3)Banking segment includes noncontrolling interest.


Three Months Ended September 30, 2020	Banking		Mortgage		Consolidated
Net interest income	$	68,791	$	37	$	68,828
Provisions for credit losses(1)	55,401		—		55,401
Mortgage banking income(2)	—		92,126		92,126
Change in fair value of mortgage servicing rights, net of hedging(2)	—		(7,440)		(7,440)
Other noninterest income	12,340		—		12,340
Depreciation and amortization	1,550		273		1,823
Amortization of intangibles	1,417		—		1,417

Other noninterest expense(3)	69,568		45,284		114,852
(Loss) income before income taxes	$	(46,805)	$	39,166	$	(7,639)
Income tax benefit					(2,040)
Net loss applicable to FB Financial Corporation and noncontrolling interest					(5,599)
Net income applicable to noncontrolling interest(4)					—
Net loss applicable to FB Financial Corporation					$	(5,599)
Total assets	$	10,143,956	$	866,482	$	11,010,438
Goodwill	236,086		—		236,086

(1)Included $9,567 in provision for credit losses on unfunded commitments.

(2)Change in fair value of mortgage servicing rights, net of hedging is included in mortgage banking income in the Company's consolidated statements of income.

(3)Included $20,400 of merger costs in the Banking Segment primarily related to the acquisition and integration of Franklin and $330 of merger costs in the Mortgage segment related to the Franklin merger.

(4)Banking segment includes noncontrolling interest.


Nine Months Ended September 30, 2021	Banking		Mortgage		Consolidated
Net interest income	$	257,726	$	(111)	$	257,615
Provisions for credit losses(1)	(30,224)		—		(30,224)
Mortgage banking income(2)	—		146,990		146,990
Change in fair value of mortgage servicing rights, net of hedging(2)	—		(10,775)		(10,775)
Other noninterest income	39,223		(402)		38,821
Depreciation and amortization	5,267		1,021		6,288
Amortization of intangibles	4,178		—		4,178

Other noninterest expense	163,261		108,938		272,199
Income before income taxes	$	154,467	$	25,743	$	180,210
Income tax expense					38,744
Net income applicable to FB Financial Corporation and noncontrolling interest					141,466
Net income applicable to noncontrolling interest(3)					8
Net income applicable to FB Financial Corporation					$	141,458
Total assets	$	10,712,281	$	1,098,009	$	11,810,290
Goodwill	242,561		—		242,561

(1)Included $(2,875) in provision for credit losses on unfunded commitments.

(2)Change in fair value of mortgage servicing rights, net of hedging is included in mortgage banking income in the Company's consolidated statements of income.

(3)Banking segment includes noncontrolling interest.


Nine Months Ended September 30, 2020	Banking		Mortgage		Consolidated
Net interest income	$	180,374	$	40	$	180,414
Provisions for credit losses(1)	110,887		—		110,887
Mortgage banking income(2)	—		216,145		216,145
Change in fair value of mortgage servicing rights, net of hedging(2)	—		(26,546)		(26,546)
Other noninterest income	31,618		—		31,618
Depreciation and amortization	4,545		770		5,315
Amortization of intangibles	3,825		—		3,825

Other noninterest expense(3)	150,022		108,068		258,090
(Loss) income before income taxes	$	(57,287)	$	80,801	$	23,514
Income tax expense					5,495


Net income applicable to FB Financial Corporation and noncontrolling interest					18,019
Net income applicable to noncontrolling interest(4)					—
Net income applicable to FB Financial Corporation					$	18,019
Total assets	$	10,143,956	$	866,482	$	11,010,438
Goodwill	236,086		—		236,086

(1)Includes $13,050 in provision for credit losses on unfunded commitments.

(2)Change in fair value of mortgage servicing rights, net of hedging is included in mortgage banking income in the Company's consolidated statements of income.

(3)Includes $25,036 of merger costs in the Banking segment related to the Farmers National acquisition and the Franklin merger and $330 of merger costs in the Mortgage segment related to the Franklin merger.

(4)Banking segment includes noncontrolling interest.

Our Banking segment provides our Mortgage segment with a warehouse line of credit that is used to fund mortgage loans held for sale. The warehouse line of credit, which is eliminated in consolidation, is limited based on interest income earned by the Mortgage segment. The amount of interest paid by our Mortgage segment to our Banking segment under this warehouse line of credit is recorded as interest income to our Banking segment and as interest expense to our Mortgage segment, both of which are included in the calculation of net interest income for each segment. The amount of interest paid by our Mortgage segment to our Banking segment under this warehouse line of credit was $6,075 and $3,940 for the three months ended September 30, 2021 and 2020, respectively, and $17,585 and $9,650 for the nine months ended September 30, 2021 and 2020, respectively.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8657-108599

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8721-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI http://asc.fasb.org/topic&trid=2134510

+ Details

Minimum capital requirements

9 Months Ended

Sep. 30, 2021

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Minimum capital requirements

Minimum capital requirements:

Banks and bank holding companies are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations involve quantitative measures of assets, liabilities, and certain off-balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can initiate regulatory action.

Under regulatory guidance for non-advanced approaches institutions, the Bank and Company are required to maintain minimum capital ratios as outlined in the table below. Additionally, under U.S. Basel III Capital Rules, the decision was made to opt out of including accumulated other comprehensive income in regulatory capital. As of September 30, 2021 and December 31, 2020, the Bank and Company met all capital adequacy requirements to which they are subject.

In March 2020, the OCC, the Board of Governors of the Federal Reserve System, and the FDIC announced a final rule to delay the estimated impact on regulatory capital stemming from the implementation of CECL. The final rule maintains the three-year transition option in the previous rule and provides banks the option to delay for two years an estimate of CECL’s effect on regulatory capital, relative to the incurred loss methodology’s effect on regulatory capital, followed by a three-year transition period (five-year transition option). The Company adopted the capital transition relief over the permissible five-year period.

Actual and required capital amounts and ratios are included below as of the dates indicated.


	Actual				Minimum Capital adequacy with capital buffer			To be well capitalized under prompt corrective action provisions
	Amount		Ratio			Amount		Ratio		Amount		Ratio
September 30, 2021
Total Capital (to risk-weighted assets)
FB Financial Corporation	$	1,400,521	14.6	%		$	1,005,220	10.5	%	N/A		N/A
FirstBank	1,352,956		14.2	%		1,003,252		10.5	%	$	955,478	10.0	%
Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,213,432	12.7	%		$	813,750	8.5	%	N/A		N/A
FirstBank	1,165,867		12.2	%		812,156		8.5	%	$	764,382	8.0	%
Tier 1 Capital (to average assets)
FB Financial Corporation	$	1,213,432	10.4	%		$	467,369	4.0	%	N/A		N/A
FirstBank	1,165,867		10.0	%		465,817		4.0	%	$	582,271	5.0	%
Common Equity Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,183,432	12.4	%		$	670,147	7.0	%	N/A		N/A
FirstBank	1,165,867		12.2	%		668,835		7.0	%	$	621,061	6.5	%


	Actual				Minimum Capital adequacy with capital buffer			To be well capitalized under prompt corrective action provisions
	Amount		Ratio			Amount		Ratio		Amount		Ratio
December 31, 2020
Total Capital (to risk-weighted assets)
FB Financial Corporation	$	1,358,897	15.0	%		$	952,736	10.5	%	N/A		N/A
FirstBank	1,353,279		14.9	%		951,327		10.5	%	$	906,026	10.0	%
Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,090,364	12.0	%		$	771,262	8.5	%	N/A		N/A
FirstBank	1,142,548		12.6	%		770,122		8.5	%	$	724,820	8.0	%
Tier 1 Capital (to average assets)
FB Financial Corporation	$	1,090,364	10.0	%		$	435,064	4.0	%	N/A		N/A
FirstBank	1,142,548		10.5	%		435,279		4.0	%	$	544,098	5.0	%
Common Equity Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,060,364	11.7	%		$	635,157	7.0	%	N/A		N/A
FirstBank	1,142,548		12.6	%		634,218		7.0	%	$	588,917	6.5	%

- Definition

The entire disclosure for regulatory capital requirement for depository and lending institutions. Institutions include, but not are not limited to, finance company, insured depository institution, bank holding company, savings and loan association holding company, bank and savings institution not federally insured, mortgage company, foreign financial institution and credit union.

+ References + Details

Stock-based compensation

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Stock-based compensation

Stock-Based Compensation

Restricted Stock Units

The Company grants restricted stock units under compensation arrangements for the benefit of employees, executive officers, and directors. Restricted stock unit grants are subject to time-based vesting. The total number of restricted stock units granted represents the maximum number of restricted stock units eligible to vest based upon the service conditions set forth in the grant agreements.

The following table summarizes information about the changes in restricted stock units as of the dates indicated:


	Nine Months Ended September 30,
	2021			2020
	Restricted Stock Units Outstanding	Weighted Average Grant Date Fair Value		Restricted Stock Units Outstanding	Weighted Average Grant Date Fair Value
Balance at beginning of period	1,047,071	$	26.06	826,263	$	23.76
Granted(1)	194,388	43.06		353,891	31.12
Vested	(699,156)	22.80		(145,157)	31.67
Forfeited	(34,298)	28.06		(19,269)	33.19
Balance at end of period	508,005	$	36.01	1,015,728	$	25.83

(1) 2020 includes 118,776 restricted stock units issued in replacement of those initially granted by Franklin. See Note 2 for additional information.

The total fair value of restricted stock units vested and released was $10,749 and $15,941 for the three and nine months ended September 30, 2021, respectively, and $3,549 and $4,597 for the three and nine months ended September 30, 2020, respectively.

The compensation cost related to stock grants and vesting of restricted stock units was $2,365 and $7,024 for the three and nine months ended September 30, 2021, respectively, and $4,651 and $6,666 for the three and nine months ended September 30, 2020, respectively. This included $168 and $467 paid to Company directors during the three and nine months ended September 30, 2021, respectively, and $237 and $615 during the three and nine months ended September 30, 2020, related to director grants and compensation elected to be settled in stock.

As of September 30, 2021 and December 31, 2020, there was $13,616 and $13,436 of total unrecognized compensation cost related to unvested restricted stock units which is expected to be recognized over a weighted-average period of 2.7 years and 2.5 years, respectively. As of September 30, 2021 and December 31, 2020, there were 1,822,506 and 2,240,434 shares available for issuance under the 2016-LTIP plan, respectively. At September 30, 2021 and December 31, 2020, there was $232 and $613, respectively, accrued in other liabilities related to dividends declared to be paid upon vesting and distribution of the underlying restricted stock units.

Performance Based Restricted Stock Units

The following table summarizes information about the changes in performance stock units as of and for the nine months ended September 30, 2021 and 2020.




	Nine Months Ended September 30,
	2021			2020
	Performance Stock Units Outstanding	Weighted Average Grant Date Fair Value		Performance Stock Units Outstanding	Weighted Average Grant Date Fair Value
Balance at beginning of period (unvested)	53,147	$	36.21	—	$	—
Granted	65,304	43.20		53,147	36.21
Vested	—	—		—	—
Forfeited or expired	(2,319)	36.73		—	—
Balance at end of period (unvested)	116,132	$	40.13	53,147	$	36.21

The Company awards performance-based restricted stock units to executives and other officers and employees. Under the terms of the award, the number of units that will vest and convert to shares of common stock will be based on the Company's performance relative to a predefined peer group over a fixed three-year performance period. The number of shares issued upon vesting will range from 0% to 200% of the PSUs granted. The PSUs vest at the end of a three-year period based on average adjusted return on tangible equity as reported, adjusted for unusual gains/losses, merger expenses, and other items as approved by the compensation committee of the Company's board of directors. Compensation expense for the PSUs will be estimated each period based on the fair value of the stock at the grant date and the most probable outcome of the performance condition, adjusted for the passage of time within the vesting period of the awards.

The Company recorded compensation cost of $551 and $1,041 during the three and nine months ended September 30, 2021 respectively, and $171 and $587 for the three and nine months ended September 30, 2020, respectively. As of September 30, 2021, the Company determined the probability of meeting the performance criteria for each grant, and recorded compensation cost associated with a 150.0% (related to shares granted in 2020) and 100.0% (related to shares granted in 2021) vesting, when factoring in the conversion of PSUs to shares of common stock. As of September 30, 2021, maximum unrecognized compensation cost at 200% payout related to the unvested PSUs was $7,279, and the remaining performance period over which the cost could be recognized was 2.1 years.

Employee Stock Purchase Plan:

The Company maintains an employee stock purchase plan under which employees, through payroll deductions, are able to purchase shares of Company common stock. The purchase price is 95% of the lower of the market price on the first or last day of the offering period. The maximum number of shares issuable during any offering period is 200,000 shares and a participant may not purchase more than 725 shares during any offering period (and, in any event, no more than $25 worth of common stock in any calendar year). There were 15,744 and 37,310 shares issued under ESPP during the three and nine months ended September 30, 2021, respectively, and 18,034 and 30,179 shares of common stock issued under the ESPP during the three and nine months ended September 30, 2020, respectively. As of September 30, 2021 and December 31, 2020, there were 2,341,696 and 2,379,006 shares available for issuance under the ESPP, respectively.

Related party transactions

9 Months Ended

Sep. 30, 2021

Related party transactions

Related party transactions:

(A) Loans:

The Bank has made and expects to continue to make loans to the directors, certain management and executive officers of the Company and their affiliates in the ordinary course of business, in compliance with regulatory requirements.

An analysis of loans to executive officers, certain management, and directors of the Bank and their affiliates is presented below:


Loans outstanding at January 1, 2021	$	24,675
New loans and advances	12,116
Change in related party status	(108)
Repayments	(5,939)
Loans outstanding at September 30, 2021	$	30,744

Unfunded commitments to certain executive officers, certain management and directors and their associates totaled $13,678 and $23,059 at September 30, 2021 and December 31, 2020, respectively.

(B) Deposits:

The Bank held deposits from related parties totaling $320,207 and $245,084 as of September 30, 2021 and December 31, 2020, respectively.

(C) Leases:

The Bank leases various office spaces from entities owned by certain directors of the Company under varying terms. The Company had $13 and $53 in unamortized leasehold improvements related to these leases at September 30, 2021 and December 31, 2020, respectively. These improvements are being amortized over a term not to exceed the length of the lease. Lease expense for these properties totaled $128 and $388 for the three and nine months ended September 30, 2021, respectively, and $125 and $381 for the three and nine months ended September 30, 2020.

(D) Aviation time sharing agreement:

The Company is a participant to an aviation time sharing agreement with an entity owned by a certain director of the Company. During the three and nine months ended September 30, 2021, the Company made payments of $0 and $32, respectively, and $17 and $108 during the three and nine months ended September 30, 2020, respectively, under this agreement.

(E) Registration rights agreement:

The Company is party to a registration rights agreement with its former majority shareholder entered into in connection with the 2016 IPO, under which the Company is responsible for payment of expenses (other than underwriting discounts and commissions) relating to sales to the public by the shareholder of shares of the Company’s common stock beneficially owned by him. Such expenses include registration fees, legal and accounting fees, and printing costs payable by the Company and expensed when incurred. During the three and nine months ended September 30, 2021, the Company paid $0 and $605, respectively, under this agreement related to the secondary offering completed during the second quarter of 2021. No such expenses were incurred during the three and nine months ended September 30, 2020.

Basis of presentation (Policies)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Overview and presentation

The unaudited consolidated financial statements, including the notes thereto, have been prepared in accordance with United States generally accepted accounting principles interim reporting requirements and general banking industry guidelines, and therefore, do not include all information and notes included in the annual consolidated financial statements in conformity with GAAP. These interim consolidated financial statements and notes thereto should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K.

The unaudited consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods. The results for interim periods are not necessarily indicative of results for a full year.

In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and the reported results of operations for the periods then ended. Actual results could differ significantly from those estimates.

Reclassifications

Certain prior period amounts have been reclassified to conform to the current period presentation without any impact on the reported amounts of net income or shareholders’ equity.

Earnings per share

Basic EPS excludes dilution and is computed by dividing earnings available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted EPS includes the dilutive effect of additional potential common shares issuable under the restricted stock units granted but not yet vested and distributable. Diluted EPS is computed by dividing earnings available to common shareholders by the weighted average number of common shares outstanding for the period, plus an incremental number of common-equivalent shares computed using the treasury stock method.

Unvested share-based payment awards, which include the right to receive non-forfeitable dividends or dividend equivalents, are considered to participate with common shareholders in undistributed earnings for purposes of computing

EPS. Companies that have such participating securities are required to calculate basic and diluted EPS using the two-class method. Certain restricted stock awards granted by the Company include non-forfeitable dividend equivalents and are considered participating securities. Calculations of EPS under the two-class method (i) exclude from the numerator any dividends paid or owed on participating securities and any undistributed earnings considered to be attributable to participating securities and (ii) exclude from the denominator the dilutive impact of the participating securities.

Recently adopted accounting policies, Recently adopted accounting standards and Newly issued not yet effective accounting standards

Recently adopted accounting policies:

The Company did not modify or adopt any new accounting policies during the three and nine months ended September 30, 2021 that were not disclosed in the Company's 2020 audited consolidated financial statements included on Form 10-K, other than as described below.

As previously disclosed, during the three months ended March 31, 2021, the Company reevaluated its business segments to align all retail mortgage activities with the Mortgage segment. Previously, the Company assigned retail mortgage activities within the Banking geographical footprint to the Banking segment. See Note 12, "Segment reporting" for additional information on this change.

Recently adopted accounting standards:

Except as set forth below, the Company did not adopt any new accounting standards that were not disclosed in the Company's 2020 audited consolidated financial statements included on Form 10-K.

In January 2021, Financial Accounting Standards Board issued ASU 2021-01, "Reference Rate Reform (Topic 848): Scope". This ASU clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. The ASU also amends the expedients and exceptions in Topic 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. The Company early adopted ASU 2021-01 upon issuance effective January 7, 2021. No contract modifications have been made under the new guidance, therefore the adoption of this update did not impact the Company's financial statements or disclosures.

Newly issued not yet effective accounting standards:

In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 is intended to provide relief for companies preparing for discontinuation of interest rates based on LIBOR. The ASU provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or other reference rates expected to be discontinued. ASU 2020-04 also provides for a onetime sale and/or transfer to AFS or trading to be made for HTM debt securities that both reference an eligible reference rate and were classified as HTM before January 1, 2020. ASU 2020-04 was effective for all entities as of March 12, 2020 and through December 31, 2022. Companies can apply the ASU as of the beginning of the interim period that includes March 12, 2020 or any date

thereafter. The guidance requires companies to apply the guidance prospectively to contract modifications and hedging relationships while the one-time election to sell and/or transfer debt securities classified as HTM may be made any time after March 12, 2020. We have established a working group to transition from LIBOR and have begun efforts to transition to alternative rates consistent with industry timelines. We have identified products that utilize LIBOR and are implementing enhanced fallback language to facilitate the transition to alternative reference rates. ASU 2020-04 is not expected to have a material impact on our consolidated financial statements.

Allowance for credit losses

Allowance for Credit Losses

The Company estimated the allowance for credit losses under a current expected credit loss model as of September 30, 2021 and December 31, 2020. The Company utilizes probability-weighted forecasts, which consider multiple macroeconomic variables from a third-party vendor that are applicable to the type of loan. Each of the Company's loss rate models incorporate forward-looking macroeconomic projections throughout the reasonable and supportable forecast period and the subsequent historical reversion at the macroeconomic variable input level. In order to estimate the life of a loan, the contractual term of the loan is adjusted for estimated prepayments based on market information and the Company’s prepayment history.

The Company's loss rate models estimate the lifetime loss rate for pools of loans by combining the calculated loss rate based on each variable within the model (including the macroeconomic variables). The lifetime loss rate for the pool is then multiplied by the loan balances to determine the expected credit losses on the pool.

The Company considers the need to qualitatively adjust its modeled quantitative expected credit loss estimate for information not already captured in the model loss estimation process. These qualitative factor adjustments may increase or decrease the Company’s estimate of expected credit losses. The Company reviews the qualitative adjustments so as to validate that information that has already been considered and included in the modeled quantitative loss estimation process is not also included in the qualitative adjustment. The Company considers the qualitative factors that are relevant to the institution as of the reporting date, which may include, but are not limited to: levels of and trends in delinquencies

and performance of loans; levels of and trends in write-offs and recoveries collected; trends in volume and terms of loans; effects of any changes in reasonable and supportable economic forecasts; effects of any changes in risk selection and underwriting standards; other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and expertise; available relevant information sources that contradict the Company’s own forecast; effects of changes in prepayment expectations or other factors affecting assessments of loan contractual terms; industry conditions; and effects of changes in credit concentrations.

The quantitative models require loan data and macroeconomic variables based on the inherent credit risks in each portfolio to more accurately measure the credit risks associated with each. Each of the quantitative models pools loans with similar risk characteristics and collectively assesses the lifetime loss rate for each pool to estimate its expected credit loss.

When a loan no longer shares similar risk characteristics with other loans in any given pool, the loan is individually assessed. The Company has determined the following circumstances in which a loan may require an individual evaluation: collateral dependent loans; loans for which foreclosure is probable; TDRs and reasonably expected TDRs. A loan is deemed collateral dependent when 1) the borrower is experiencing financial difficulty and 2) the repayment is expected to be primarily through sale or operation of the collateral. The allowance for credit losses for collateral dependent loans as well as loans where foreclosure is probable is calculated as the amount for which the loan’s amortized cost basis exceeds fair value. Fair value is determined based on appraisals performed by qualified appraisers and reviewed by qualified personnel. In cases where repayment is to be provided substantially through the sale of collateral, the Company reduces the fair value by the estimated costs to sell. Loans experiencing financial difficulty for which a concession has not yet been provided may be identified as reasonably expected TDRs.

Reasonably expected TDRs use the same methodology as TDRs. In cases where the expected credit loss can only be captured through a discounted cash flow analysis (such as an interest rate modification for a TDR loan), the allowance is measured by the amount which the loan’s amortized cost exceeds the discounted cash flow analysis. The allowance for credit losses on a TDR or a reasonably expected TDR is calculated individually using a discounted cash flow methodology, unless the loan is deemed to be collateral dependent or foreclosure is probable.

Credit Quality

The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans that share similar risk characteristics collectively. Loans that do not share similar risk characteristics are evaluated individually.

The Company uses the following definitions for risk ratings:


			Pass.			Loans rated Pass include those that are adequately collateralized performing loans which management believes do not have conditions that have occurred or may occur that would result in the loan being downgraded into an inferior category. The Pass category also includes loans rated as Watch, which include those that management believes have conditions that have occurred, or may occur, which could result in the loan being downgraded to an inferior category.




			Special Mention.			Loans rated Special Mention are those that have potential weakness that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or in the institution’s credit position at some future date. Management does not believe there will be a loss of principal or interest. These loans require intensive servicing and may possess more than normal credit risk.




			Classified.			Loans included in the Classified category include loans rated as Substandard and Doubtful. Loans rated as Substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Substandard loans have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Also included in this category are loans classified as Doubtful, which have all the weaknesses inherent in those classified as Substandard, with the added characteristic that the weakness or weaknesses make collection or liquidation in full, based on currently existing facts, conditions, and values, highly questionable and improbable. The total amortized cost of loans rated as Doubtful were insignificant for all periods presented.

Risk ratings are updated on an ongoing basis and are subject to change by continuous loan monitoring processes.

Fair Value of Financial Instruments

Fair value of financial instruments:FASB ASC 820-10 defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820-10 also establishes a framework for measuring the fair value of assets and liabilities according to a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets and liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The hierarchy maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that are derived from assumptions based on management’s estimate of assumptions that market participants would use in pricing the asset or liability based on the best information available under the circumstances.

The hierarchy is broken down into the following three levels, based on the reliability of inputs:

Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities that are accessible at the measurement date.

Level 2: Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data.

Level 3: Significant unobservable inputs for assets or liabilities that are derived from assumptions based on management’s estimate of assumptions that market participants would use in pricing the assets or liabilities.

The Company records the fair values of financial assets and liabilities on a recurring and non-recurring basis using the following methods and assumptions:


Investment Securities						Investment securities are recorded at fair value on a recurring basis. Fair values for securities are based on quoted market prices, where available. If quoted prices are not available, fair values are based on quoted market prices of similar instruments or are determined by matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the pricing relationship or correlation among other benchmark quoted securities. Investment securities valued using quoted market prices of similar instruments or that are valued using matrix pricing are classified as Level 2. When significant inputs to the valuation are unobservable, the available-for-sale securities are classified within Level 3 of the fair value hierarchy. Where no active market exists for a security or other benchmark securities, fair value is estimated by the Company with reference to discount margins for other high-risk securities.

Loans held for sale						Loans held for sale are carried at fair value. Fair value is determined using current secondary market prices for loans with similar characteristics for the mortgage portfolio, that is, using Level 2 inputs. Commercial loans held for sale's fair value is determined using an income approach with various assumptions including expected cash flows, market discount rates, credit metrics and collateral value when appropriate. As such, these are considered Level 3.

Derivatives						The fair value of the Company's interest rate swaps are based upon fair values provided from entities that engage in interest rate swap activity and is based upon projected future cash flows and interest rates. Fair value of commitments is based on fees currently charged to enter into similar agreements, and for fixed-rate commitments, the difference between current levels of interest rates and the committed rates is also considered. These financial instruments are classified as Level 2.

OREO						OREO is comprised of commercial and residential real estate obtained in partial or total satisfaction of loan obligations and excess land and facilities held for sale. OREO acquired in settlement of indebtedness is recorded at the lower of the carrying amount of the loan or the fair value of the real estate less costs to sell. Fair value is determined on a nonrecurring basis based on appraisals by qualified licensed appraisers and is adjusted for management’s estimates of costs to sell and holding period discounts. The valuations are classified as Level 3.

Mortgage servicing rights						MSRs are carried at fair value. Fair value is determined using an income approach with various assumptions including expected cash flows, market discount rates, prepayment speeds, servicing costs, and other factors. As such, MSRs are considered Level 3.

Collateral dependent loans						Collateral dependent loans are loans for which, based on current information and events, the Company has determined foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and the Company expects repayment of the loan to be provided substantially through the operation or sale of the collateral and it is probable that the creditor will be unable to collect all amounts due according to the contractual terms of the loan agreement. Collateral dependent loans are classified as Level 3.

For collateral dependent loans, the ACL is measured based on the difference between the fair value of the collateral and the amortized cost basis of the loan as of the measurement date. Fair value of the loan's collateral is determined by third-party appraisals, which are then adjusted for the estimated selling and closing costs related to liquidation of the collateral. Collateral dependent loans are reviewed and evaluated on at least a quarterly basis for additional impairment and adjusted accordingly, based on changes in market conditions from the time of valuation and management's knowledge of the client and client's business. As of September 30, 2021 and December 31, 2020, total amortized cost of collateral dependent loans measured on a non-recurring basis amounted to $6,918 and $7,839, respectively.

Other real estate owned acquired in settlement of indebtedness is recorded at fair value of the real estate less estimated costs to sell. Subsequently, it may be necessary to record nonrecurring fair value adjustments for declines in fair value. Any write-downs based on the asset's fair value at the date of foreclosure are charged to the allowance for credit losses. Appraisals for both collateral dependent loans and other real estate owned are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. Once received, a member of the lending administrative department reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry wide statistics. Collateral dependent loans that are dependent on recovery through sale of equipment, such as farm equipment, automobiles and aircrafts are generally valued based on public source pricing or subscription services while more complex assets are valued through leveraging brokers who have expertise in the collateral involved.

- Definition

Disclosure of accounting policy for credit loss on financial instrument measured at amortized cost basis, net investment in lease, off-balance sheet credit exposure, and available-for-sale debt security. Includes, but is not limited to, methodology used to estimate allowance for credit loss, how writeoff of uncollectible amount is recognized, and determination of past due status and nonaccrual status.

+ References

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+ Details

Basis of presentation (Tables)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Schedule of Basic and Diluted Earnings Per Common Share Calculation

The following is a summary of the basic and diluted earnings per common share calculation for each of the periods presented:


	Three Months Ended September 30,			Nine Months Ended September 30,
		2021		2020		2021		2020
Basic earnings (loss) per common share calculation:
Net income (loss) applicable to FB Financial Corporation		$	45,290	$	(5,599)	$	141,458	$	18,019
Dividends paid on and undistributed earnings allocated to participating securities		—		—		—		—
Earnings (loss) available to common shareholders		$	45,290	$	(5,599)	$	141,458	$	18,019
Weighted average basic shares outstanding		47,412,214		40,154,841		47,345,984		34,404,064
Basic earnings (loss) per common share		$	0.96	$	(0.14)	$	2.99	$	0.52
Diluted earnings per common share:
Earnings (loss) available to common shareholders		$	45,290	$	(5,599)	$	141,458	$	18,019
Weighted average basic shares outstanding		47,412,214		40,154,841		47,345,984		34,404,064
Weighted average diluted shares contingently issuable(1)		594,933		482,904		637,510		436,228
Weighted average diluted shares outstanding		48,007,147		40,637,745		47,983,494		34,840,292
Diluted earnings (loss) per common share		$	0.94	$	(0.14)	$	2.95	$	0.52

(1)Excludes 15,974 and 20,448 restricted stock units outstanding considered to be antidilutive for the three and nine months ended September 30, 2021, respectively and 332,347 and 536,908 for three and nine months ended September 30, 2020.

Mergers and acquisitions (Tables)

9 Months Ended

Sep. 30, 2021

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the estimated fair values of assets acquired and liabilities assumed as of the respective acquisition dates:


	As of August 15, 2020		As of February 14, 2020
	Franklin Financial Network, Inc.		FNB Financial Corp.
ASSETS
Cash and cash equivalents	$	284,004	$	10,774
Investments	373,462		50,594
Mortgage loans held for sale, at fair value	38,740		—
Commercial loans held for sale, at fair value	326,206		—
Loans held for investment, net of fair value adjustments	2,427,527		182,171
Allowance for credit losses on purchased credit deteriorated loans	(24,831)		(669)
Premises and equipment	45,471		8,049
Operating lease right-of-use assets	23,958		14
Mortgage servicing rights	5,111		—
Core deposit intangible	7,670		2,490
Other assets	124,571		4,795
Total assets	$	3,631,889	$	258,218
LIABILITIES
Deposits:
Noninterest-bearing	$	505,374	$	63,531
Interest-bearing checking	1,783,379		26,451
Money market and savings	342,093		37,002
Customer time deposits	383,433		82,551
Brokered and internet time deposits	107,452		—
Total deposits	3,121,731		209,535

Borrowings	62,435		3,192
Operating lease liabilities	24,330		14
Accrued expenses and other liabilities	12,661		1,754
Total liabilities assumed	3,221,157		214,495
Noncontrolling interests acquired	93		—
Net assets acquired	$	410,639	$	43,723

Schedule of Purchased Credit-deteriorated Loans


	As of August 15, 2020		As of February 14, 2020
	Franklin Financial Network, Inc.		FNB Financial Corp.
Purchased credit-deteriorated loans
Principal balance	$	693,999	$	18,964
Allowance for credit losses at acquisition	(24,831)		(669)
Net premium attributable to other factors	8,810		63
Loans purchased credit-deteriorated fair value	$	677,978	$	18,358

Schedule of Pro Forma Financial Information (Unaudited)

The following unaudited pro forma condensed consolidated financial information presents the results of operations for the three and nine months ended September 30, 2020, as though the Franklin and Farmers National acquisitions had been completed as of January 1, 2019. The unaudited estimated pro forma information combines the historical results of the mergers with the Company’s historical consolidated results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the periods presented. Merger expenses are reflected in the period they were incurred. The pro forma information is not indicative of what would have occurred had the transactions taken place on January 1, 2019 and does not include the effect of cost-saving or revenue-enhancing strategies.


	Three Months Ended September 30,		Nine Months Ended September 30,
	2020		2020
Net interest income	$	83,641	$	252,849
Total revenues	$	178,384	$	488,493
Net (loss) income applicable to FB Financial Corporation	$	(12,428)	$	19,526

Franklin Financial Network, Inc.

Business Acquisition [Line Items]

Schedule of Consideration Paid and Allocation of Purchase Price to Net Assets Acquired

The following table presents an allocation of the consideration to net assets acquired:


Purchase Price:
Equity consideration
Franklin shares outstanding(1)	15,588,337
Franklin options converted to net shares	62,906
	15,651,243
Exchange ratio to FB Financial shares	0.965
FB Financial shares to be issued as merger consideration(2)	15,102,492
Issuance price as of August 15, 2020	$	29.52
Value of FB Financial stock to be issued as merger consideration	$	445,826
Less: tax withholding on vested restricted stock awards, units and options(3)	(1,308)
Value of FB Financial stock issued	$	444,518
FB Financial shares issued	15,058,181

Franklin restricted stock units that do not vest on change in control	114,915
Replacement awards issued to Franklin employees	118,776
Fair value of replacement awards	$	3,506
Fair value of replacement awards attributable to pre-combination service	$	674

Cash consideration
Total Franklin shares and net shares outstanding	15,651,243
Cash consideration per share	$	2.00
Total cash to be paid to Franklin(4)	$	31,330
Total purchase price			$	477,830
Fair value of net assets acquired			410,639
Goodwill resulting from merger			$	67,191

(1)Franklin shares outstanding includes restricted stock awards and restricted stock units that vested upon change in control.

(2)Only factors in whole share issuance. Cash was paid in lieu of fractional shares.

(3)Represents the equivalent value of approximately 44,311 shares of FB Financial Corporation stock on August 15, 2020.

(4)Includes $28 of cash paid in lieu of fractional shares.

FNB Financial Corp.

Business Acquisition [Line Items]

Schedule of Consideration Paid and Allocation of Purchase Price to Net Assets Acquired

The following table presents the total purchase price, fair value of net assets acquired, and the goodwill as of the acquisition date.


Consideration:
Net shares issued	954,797
Purchase price per share on February 14, 2020	$	36.70
Value of stock consideration			$	35,041
Cash consideration paid			15,001
Total purchase price			$	50,042
Fair value of net assets acquired			43,723
Goodwill resulting from merger			$	6,319

Investment securities (Tables)

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Amortized Cost of Securities and Fair Values

The following tables summarize the amortized cost, allowance for credit losses and fair value of the available-for-sale debt securities and the corresponding amounts of unrealized gains and losses recognized in accumulated other comprehensive income at September 30, 2021 and December 31, 2020:


	September 30, 2021
	Amortized cost		Gross unrealized gains		Gross unrealized losses		Allowance for credit losses for investments		Fair Value
Investment Securities
Available-for-sale debt securities
U.S. government agency securities	$	10,598	$	5	$	(32)	$	—	$	10,571
Mortgage-backed securities - residential	1,211,042		9,111		(9,650)		—		1,210,503
Mortgage-backed securities - commercial	15,374		368		(30)		—		15,712
Municipal securities	312,672		14,881		(314)		—		327,239
U.S. Treasury securities	5,998		8		—		—		6,006
Corporate securities	2,500		35		(8)		—		2,527
Total	$	1,558,184	$	24,408	$	(10,034)	$	—	$	1,572,558


	December 31, 2020
	Amortized cost		Gross unrealized gains		Gross unrealized losses		Allowance for credit losses for investments		Fair Value
Investment Securities
Available-for-sale debt securities
U.S. government agency securities	$	2,000	$	3	$	—	$	—	$	2,003
Mortgage-backed securities - residential	760,099		14,040		(803)		—		773,336
Mortgage-backed securities - commercial	20,226		1,362		—		—		21,588
Municipal securities	336,543		19,806		(20)		—		356,329
U.S. Treasury securities	16,480		148		—		—		16,628
Corporate securities	2,500		17		(1)		—		2,516
Total	$	1,137,848	$	35,376	$	(824)	$	—	$	1,172,400

Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

Therefore, mortgage-backed securities are not included in the maturity categories in the following maturity summary.


	September 30,				December 31,
	2021				2020
	Available-for-sale				Available-for-sale
	Amortized cost		Fair value		Amortized cost		Fair value
Due in one year or less	$	16,713	$	16,773	$	35,486	$	35,662
Due in one to five years	20,242		20,637		24,278		24,684
Due in five to ten years	40,757		42,211		40,038		41,332
Due in over ten years	254,056		266,722		257,721		275,798
	331,768		346,343		357,523		377,476
Mortgage-backed securities - residential	1,211,042		1,210,503		760,099		773,336
Mortgage-backed securities - commercial	15,374		15,712		20,226		21,588
Total debt securities	$	1,558,184	$	1,572,558	$	1,137,848	$	1,172,400

Schedule of Sales and Other Dispositions of Available-for-Sale Securities

Sales and other dispositions of available-for-sale securities were as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Proceeds from sales	$	8,855	$	28,257	$	8,855	$	28,257
Proceeds from maturities, prepayments and calls	68,126		67,886		216,032		140,246
Gross realized gains	76		563		91		563
Gross realized losses	1		39		1		39

Schedule of Gross Unrealized Losses

The following tables show gross unrealized losses for which an allowance for credit losses has not been recorded at September 30, 2021 and December 31, 2020, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position:


	September 30, 2021
	Less than 12 months				12 months or more				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government agency securities	$	7,639	$	(32)	$	—	$	—	$	7,639	$	(32)
Mortgage-backed securities - residential	711,775		(9,377)		24,341		(273)		736,116		(9,650)
Mortgage-backed securities - commercial	1,949		(30)		—		—		1,949		(30)
Municipal securities	30,371		(314)		—		—		30,371		(314)

Corporate securities	492		(8)		—		—		492		(8)
Total	$	752,226	$	(9,761)	$	24,341	$	(273)	$	776,567	$	(10,034)


	December 31, 2020
	Less than 12 months				12 months or more				Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized loss

Mortgage-backed securities - residential	$	182,012	$	(803)	$	—	$	—	$	182,012	$	(803)
Municipal securities	3,184		(20)		—		—		3,184		(20)
Corporate Securities	499		(1)						499		(1)

Total	$	185,695	$	(824)	$	—	$	—	$	185,695	$	(824)

Loans and allowance for credit losses (Tables)

9 Months Ended

Sep. 30, 2021

Receivables [Abstract]

Schedule of Loans Outstanding by Class of Financing Receivable

Loans outstanding at September 30, 2021 and December 31, 2020, by class of financing receivable are as follows:


	September 30,		December 31,
	2021		2020
Commercial and industrial (1)	$	1,252,425	$	1,346,122
Construction	1,190,623		1,222,220
Residential real estate:
1-to-4 family mortgage	1,175,155		1,089,270
Residential line of credit	392,440		408,211
Multi-family mortgage	324,662		175,676
Commercial real estate:
Owner occupied	938,241		924,841
Non-owner occupied	1,695,573		1,598,979
Consumer and other	325,555		317,640
Gross loans	7,294,674		7,082,959
Less: Allowance for credit losses	(139,446)		(170,389)
Net loans	$	7,155,228	$	6,912,570

(1)Includes $9,415 and $212,645 of loans originated as part of the Paycheck Protection Program as of September 30, 2021 and December 31, 2020, respectively. PPP loans are federally guaranteed as part of the CARES Act, provided PPP loan recipients receive loan forgiveness under the SBA regulations. As such, there is minimal credit risk associated with these loans.

Schedule of Changes in Allowance for Credit Losses by Class of Financing Receivable

The following provide the changes in the allowance for credit losses by class of financing receivable for the three and nine months ended September 30, 2021 and 2020:


	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Three months ended September 30, 2021
Beginning balance - June 30, 2021	$	13,791	$	32,838	$	19,672	$	6,716	$	13,475	$	4,707	$	42,856	$	10,608	$	144,663
Provision for credit losses	3,203		(3,080)		(2,677)		(952)		(1,462)		7,665		(6,450)		921		(2,832)
Recoveries of loans previously charged-off	19		3		33		1		—		4		—		169		229
Loans charged off	(2,175)		(1)		—		—		—		—		—		(438)		(2,614)


Ending balance - September 30, 2021	$	14,838	$	29,760	$	17,028	$	5,765	$	12,013	$	12,376	$	36,406	$	11,260	$	139,446
Nine Months Ended September 30, 2021
Beginning balance - December 31, 2020	$	14,748	$	58,477	$	19,220	$	10,534	$	7,174	$	4,849	$	44,147	$	11,240	$	170,389


Provision for credit losses	2,667		(28,690)		(2,141)		(4,767)		4,839		7,384		(7,741)		1,100		(27,349)
Recoveries of loans previously charged-off	235		3		98		16		—		143		—		554		1,049
Loans charged off	(2,812)		(30)		(149)		(18)		—		—		—		(1,634)		(4,643)


Ending balance - September 30, 2021	$	14,838	$	29,760	$	17,028	$	5,765	$	12,013	$	12,376	$	36,406	$	11,260	$	139,446


	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Three months ended September 30, 2020
Beginning balance - June 30, 2020	$	8,878	$	35,599	$	12,463	$	6,811	$	4,499	$	7,420	$	30,444	$	7,015	$	113,129
Provision for loan losses	(1,520)		22,383		4,194		4,053		1,908		(1,276)		12,364		3,728		45,834
Recoveries of loans previously charged-off	757		51		116		22		—		51		—		175		1,172
Loans charged off	(249)		—		(8)		—		—		(95)		(166)		(475)		(993)
Initial allowance on loans purchased with deteriorated credit quality	$	743	$	5,596	$	1,533	$	569	$	784	$	605	$	14,998	$	3	$	24,831
Ending balance - September 30, 2020	$	8,609	$	63,629	$	18,298	$	11,455	$	7,191	$	6,705	$	57,640	$	10,446	$	183,973
Nine Months Ended September 30, 2020
Beginning balance - December 31, 2019	$	4,805	$	10,194	$	3,112	$	752	$	544	$	4,109	$	4,621	$	3,002	$	31,139
Impact of adopting ASC 326 on non-purchased credit deteriorated loans	5,300		1,533		7,920		3,461		340		1,879		6,822		3,633		30,888
Impact of adopted ASC 326 on purchased credit deteriorated loans	82		150		421		(3)		—		162		184		(438)		558
Provision for loan losses	(2,354)		45,962		5,412		6,633		5,523		132		31,282		5,247		97,837
Recoveries of loans previously charged-off	1,652		202		166		61		—		68		—		471		2,620
Loans charged off	(1,630)		(18)		(373)		(21)		—		(304)		(711)		(1,512)		(4,569)
Initial allowance on loans purchased with deteriorated credit quality	754		5,606		1,640		572		784		659		15,442		43		25,500

Ending balance - September 30, 2020	$	8,609	$	63,629	$	18,298	$	11,455	$	7,191	$	6,705	$	57,640	$	10,446	$	183,973

Schedule of Allowance for Credit Losses by Class of Financing Receivable Disaggregated by Measurement Methodology

The following tables provide the amount of the allowance for credit losses by class of financing receivable disaggregated by measurement methodology as of September 30, 2021 and December 31, 2020:


	September 30, 2021
	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Amount of allowance allocated to:
Individually evaluated for credit loss	$	123	$	112	$	—	$	7	$	—	$	167	$	624	$	2	$	1,035
Collectively evaluated for credit loss	14,148		28,244		16,056		5,597		11,561		11,244		26,676		10,657		124,183
Purchased credit deteriorated	567		1,404		972		161		452		965		9,106		601		14,228
Ending balance - September 30, 2021	$	14,838	$	29,760	$	17,028	$	5,765	$	12,013	$	12,376	$	36,406	$	11,260	$	139,446


	December 31, 2020
	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Amount of allowance allocated to:
Individually evaluated for credit loss	$	373	$	95	$	—	$	9	$	—	$	30	$	1,531	$	1	$	2,039
Collectively evaluated for credit loss	13,493		54,065		17,206		10,031		6,326		4,062		33,706		10,516		149,405
Purchased credit deteriorated	882		4,317		2,014		494		848		757		8,910		723		18,945
Ending balance - December 31, 2020	$	14,748	$	58,477	$	19,220	$	10,534	$	7,174	$	4,849	$	44,147	$	11,240	$	170,389

Schedule of Amount of Loans by Class of Financing Receivable Disaggregated by Measurement Methodology

The following tables provide the amount of loans by class of financing receivable disaggregated by measurement methodology as of September 30, 2021, and December 31, 2020:


	September 30, 2021
	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Loans, net of unearned income
Individually evaluated for credit loss	$	2,802	$	4,597	$	375	$	1,123	$	—	$	7,808	$	11,430	$	26	$	28,161
Collectively evaluated for credit loss	1,206,783		1,148,604		1,112,578		380,272		315,140		857,865		1,419,981		313,079		6,754,302
Purchased credit deteriorated	42,840		37,422		62,202		11,045		9,522		72,568		264,162		12,450		512,211
Ending balance - September 30, 2021	$	1,252,425	$	1,190,623	$	1,175,155	$	392,440	$	324,662	$	938,241	$	1,695,573	$	325,555	$	7,294,674


	December 31, 2020
	Commercial and industrial		Construction		1-to-4 family residential mortgage		Residential line of credit		Multi-family residential mortgage		Commercial real estate owner occupied		Commercial real estate non-owner occupied		Consumer and other		Total
Loans, net of unearned income
Individually evaluated for credit loss	$	15,578	$	4,851	$	848	$	412	$	—	$	7,846	$	8,631	$	39	$	38,205
Collectively evaluated for credit loss	1,270,058		1,140,634		987,142		387,250		156,447		813,151		1,272,203		302,983		6,329,868
Purchased credit deteriorated	60,486		76,735		101,280		20,549		19,229		103,844		318,145		14,618		714,886
Ending balance - December 31, 2020	$	1,346,122	$	1,222,220	$	1,089,270	$	408,211	$	175,676	$	924,841	$	1,598,979	$	317,640	$	7,082,959

Schedule of Credit Quality of Loan Portfolio by Year of Origination

The following tables present the credit quality of our loan portfolio by year of origination as of September 30, 2021 and December 31, 2020. Revolving loans are presented separately. Management considers the guidance in ASC 310-20 when determining whether a modification, extension, or renewal constitutes a current period origination. Generally, current period renewals of credit are reunderwritten at the point of renewal and considered current period originations for the purposes of the tables below.


As of September 30, 2021
	Term Loans
	Amortized Cost Basis by Origination Year
	2021		2020		2019		2018		2017		Prior		Revolving Loans Amortized Cost Basis		Total
Commercial and industrial
Pass	$	194,285	$	105,301	$	151,572	$	60,459	$	44,334	$	61,502	$	591,465	$	1,208,918
Special Mention	68		246		414		19		5		2,051		12,987		15,790
Classified	893		2,601		2,678		3,527		3,618		6,711		7,689		27,717

Total	195,246		108,148		154,664		64,005		47,957		70,264		612,141		1,252,425

Construction
Pass	455,443		337,263		145,945		47,026		19,507		67,697		106,294		1,179,175
Special Mention	—		—		—		—		1,209		1,441		—		2,650
Classified	—		—		3,035		2,879		4		2,698		182		8,798

Total	455,443		337,263		148,980		49,905		20,720		71,836		106,476		1,190,623

Residential real estate:
1-to-4 family mortgage
Pass	360,638		217,308		128,286		115,183		116,907		211,215		—		1,149,537
Special Mention	201		1,346		525		389		99		1,648		—		4,208
Classified	901		2,884		1,962		3,086		4,549		8,028		—		21,410

Total	361,740		221,538		130,773		118,658		121,555		220,891		—		1,175,155

Residential line of credit
Pass	—		—		—		—		—		—		387,472		387,472
Special Mention	—		—		—		—		—		—		407		407
Classified	—		—		—		—		—		—		4,561		4,561

Total	—		—		—		—		—		—		392,440		392,440

Multi-family mortgage
Pass	144,982		32,463		68,421		7,050		20,528		39,546		10,408		323,398
Special Mention	—		—		—		—		—		—		—		—
Classified	—		—		—		—		—		1,264		—		1,264

Total	144,982		32,463		68,421		7,050		20,528		40,810		10,408		324,662


Commercial real estate:
Owner occupied
Pass	117,740		140,281		177,960		86,488		83,352		247,941		52,732		906,494
Special Mention	—		—		1,328		3,595		112		2,948		220		8,203
Classified	—		—		3,118		779		4,122		13,770		1,755		23,544

Total	117,740		140,281		182,406		90,862		87,586		264,659		54,707		938,241

Non-owner occupied
Pass	304,279		163,471		180,893		282,221		203,813		460,088		46,599		1,641,364
Special Mention	—		—		3,812		3,452		—		8,041		—		15,305
Classified	—		—		2,082		24,173		1,524		11,125		—		38,904

Total	304,279		163,471		186,787		309,846		205,337		479,254		46,599		1,695,573


As of September 30, 2021
	Term Loans
	Amortized Cost Basis by Origination Year
	2021		2020		2019		2018		2017		Prior		Revolving Loans Amortized Cost Basis		Total
Consumer and other loans
Pass	72,706		59,182		40,851		34,539		22,783		74,776		14,827		319,664
Special Mention	75		—		10		—		1		383		—		469
Classified	43		129		341		1,015		897		2,561		436		5,422

Total	72,824		59,311		41,202		35,554		23,681		77,720		15,263		325,555

Total Loans
Pass	1,650,073		1,055,269		893,928		632,966		511,224		1,162,765		1,209,797		7,116,022
Special Mention	344		1,592		6,089		7,455		1,426		16,512		13,614		47,032
Classified	1,837		5,614		13,216		35,459		14,714		46,157		14,623		131,620

Total	$	1,652,254	$	1,062,475	$	913,233	$	675,880	$	527,364	$	1,225,434	$	1,238,034	$	7,294,674


As of December 31, 2020
	Term Loans
	Amortized Cost Basis by Origination Year
	2020		2019		2018		2017		2016		Prior		Revolving Loans Amortized Cost Basis		Total
Commercial and industrial
Pass	$	339,074	$	185,636	$	70,549	$	59,917	$	37,573	$	42,685	$	540,960	$	1,276,394
Special Mention	231		824		561		445		915		2,580		24,826		30,382
Classified	2,501		2,688		11,227		4,425		6,582		1,277		10,646		39,346

Total	341,806		189,148		82,337		64,787		45,070		46,542		576,432		1,346,122

Construction
Pass	461,715		390,443		86,490		52,942		40,907		62,890		112,004		1,207,391
Special Mention	469		1,485		2,197		1,221		729		13		—		6,114
Classified	573		1,755		3,178		141		—		3,068		—		8,715

Total	462,757		393,683		91,865		54,304		41,636		65,971		112,004		1,222,220

Residential real estate:
1-to-4 family mortgage
Pass	283,107		176,711		164,499		157,731		111,194		162,051		—		1,055,293
Special Mention	1,423		1,829		1,209		753		721		3,865		—		9,800
Classified	448		1,428		3,806		5,473		3,622		9,400		—		24,177

Total	284,978		179,968		169,514		163,957		115,537		175,316		—		1,089,270

Residential line of credit
Pass	—		—		—		—		—		—		400,206		400,206
Special Mention	—		—		—		—		—		—		2,653		2,653
Classified	—		—		—		—		—		—		5,352		5,352

Total	—		—		—		—		—		—		408,211		408,211

Multi-family mortgage
Pass	29,006		13,446		11,843		46,561		28,330		35,339		11,094		175,619
Special Mention	—		—		—		—		—		—		—		—
Classified	—		—		—		—		—		57		—		57

Total	29,006		13,446		11,843		46,561		28,330		35,396		11,094		175,676


Commercial real estate:
Owner occupied
Pass	140,904		179,500		97,577		94,659		76,539		224,108		53,451		866,738
Special Mention	967		1,356		4,251		16,173		6,101		2,466		230		31,544
Classified	44		1,785		2,423		6,074		274		11,226		4,733		26,559

Total	141,915		182,641		104,251		116,906		82,914		237,800		58,414		924,841

Non-owner occupied
Pass	166,962		229,442		342,640		221,149		290,163		272,184		38,820		1,561,360
Special Mention	—		1,500		6,672		—		207		8,445		—		16,824
Classified	—		2,210		1,502		—		—		17,083		—		20,795

Total	166,962		233,152		350,814		221,149		290,370		297,712		38,820		1,598,979

Consumer and other loans
Pass	89,625		52,839		39,725		27,201		43,503		37,673		14,817		305,383
Special Mention	281		797		1,588		468		526		1,364		11		5,035
Classified	151		565		1,434		1,161		935		2,308		668		7,222

Total	90,057		54,201		42,747		28,830		44,964		41,345		15,496		317,640


As of December 31, 2020
	Term Loans
	Amortized Cost Basis by Origination Year
	2020		2019		2018		2017		2016		Prior		Revolving Loans Amortized Cost Basis		Total
Total Loans
Pass	1,510,393		1,228,017		813,323		660,160		628,209		836,930		1,171,352		6,848,384
Special Mention	3,371		7,791		16,478		19,060		9,199		18,733		27,720		102,352
Classified	3,717		10,431		23,570		17,274		11,413		44,419		21,399		132,223

Total	$	1,517,481	$	1,246,239	$	853,371	$	696,494	$	648,821	$	900,082	$	1,220,471	$	7,082,959

Schedule of Analysis of Aging by Class of Financing Receivable

The following tables represent an analysis of the aging by class of financing receivable as of September 30, 2021 and December 31, 2020:


September 30, 2021	30-89 days past due		90 days or more and accruing interest		Non-accrual loans		Loans current on payments and accruing interest		Total
Commercial and industrial	$	1,400	$	126	$	2,896	$	1,248,003	$	1,252,425
Construction	2,078		1,057		3,851		1,183,637		1,190,623
Residential real estate:
1-to-4 family mortgage	5,233		6,989		4,936		1,157,997		1,175,155
Residential line of credit	1,132		—		1,269		390,039		392,440
Multi-family mortgage	—		—		50		324,612		324,662
Commercial real estate:
Owner occupied	565		—		6,239		931,437		938,241
Non-owner occupied	452		—		11,666		1,683,455		1,695,573
Consumer and other	4,542		729		3,219		317,065		325,555
Total	$	15,402	$	8,901	$	34,126	$	7,236,245	$	7,294,674


December 31, 2020	30-89 days past due		90 days or more and accruing interest		Non-accrual loans		Loans current on payments and accruing interest		Total
Commercial and industrial	$	3,297	$	330	$	16,005	$	1,326,490	$	1,346,122
Construction	7,607		573		4,053		1,209,987		1,222,220
Residential real estate:
1-to-4 family mortgage	7,058		10,470		5,923		1,065,819		1,089,270
Residential line of credit	3,551		239		1,757		402,664		408,211
Multi-family mortgage	—		57		—		175,619		175,676
Commercial real estate:
Owner occupied	98		—		7,948		916,795		924,841
Non-owner occupied	915		—		12,471		1,585,593		1,598,979
Consumer and other	4,469		2,027		2,603		308,541		317,640
Total	$	26,995	$	13,696	$	50,760	$	6,991,508	$	7,082,959

Schedule of Amortized Cost, Related Allowance and Interest Income of Non-accrual Loans

The following tables provide the amortized cost basis of loans on non-accrual status, as well as any related allowance as of September 30, 2021 and December 31, 2020 by class of financing receivable.



September 30, 2021	Non-accrual with no related allowance		Non-accrual with related allowance		Related allowance
Commercial and industrial	$	1,777	$	1,119	$	135
Construction	2,879		972		121
Residential real estate:
1-to-4 family mortgage	772		4,164		66
Residential line of credit	804		465		9
Multi-family mortgage	—		50		8
Commercial real estate:
Owner occupied	5,408		831		171
Non-owner occupied	6,279		5,387		641
Consumer and other	—		3,219		163
Total	$	17,919	$	16,207	$	1,314



December 31, 2020	Non-accrual with no related allowance		Non-accrual with related allowance		Related allowance

Commercial and industrial	$	13,960	$	2,045	$	383
Construction	3,061		992		131
Residential real estate:
1-to-4 family mortgage	3,048		2,875		84
Residential line of credit	854		903		31
Multi-family mortgage	—		—		—
Commercial real estate:
Owner occupied	7,172		776		63
Non-owner occupied	4,566		7,905		1,711
Consumer and other	—		2,603		147
Total	$	32,661	$	18,099	$	2,550

The following presents interest income recognized on nonaccrual loans during the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Commercial and industrial	$	190	$	287	$	523	$	304
Construction	75		42		105		48
Residential real estate:
1-to-4 family mortgage	114		15		199		21
Residential line of credit	197		72		242		72
Multi-family mortgage	—		—		2		—
Commercial real estate:
Owner occupied	187		32		419		75
Non-owner occupied	123		76		353		185
Consumer and other	75		—		130		24
Total	$	961	$	524	$	1,973	$	729

Schedule of Financial Effect of TDRs

The following tables present the financial effect of TDRs recorded during the periods indicated.


Three Months Ended September 30, 2021	Number of loans	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Charge offs and specific reserves





Residential real estate:
1-to-4 family mortgage	1	$	134	$	134	$	—


Total	1	$	134	$	134	$	—


Nine Months Ended September 30, 2021	Number of loans	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Charge offs and specific reserves
Commercial and industrial	5	$	13,162	$	13,162	$	—

Commercial real estate:
Owner occupied	4	3,550		3,550		—
Non-owner occupied	1	11,997		11,997		—
Residential real estate:
1-to-4 family mortgage	3	945		945		—
Residential line of credit	1	11		11		—

Total	14	$	29,665	$	29,665	$	—


Three Months Ended September 30, 2020	Number of loans	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Charge offs and specific reserves
Commercial and industrial	2	$	420	$	420	$	—








Total	2	$	420	$	420	$	—


Nine Months Ended September 30, 2020	Number of loans	Pre-modification outstanding recorded investment		Post-modification outstanding recorded investment		Charge offs and specific reserves
Commercial and industrial	3	$	1,573	$	1,573	$	—

Commercial real estate:
Owner occupied	1	788		788
Non-owner occupied	2	3,752		3,752		—
Residential real estate:
1-4 family mortgage	2	77		77		—

Total	8	$	6,190	$	6,190	$	—

Schedule of Individually Assessed Allowance for Credit Losses for Collateral Dependent Loans

For loans for which the repayment (based on the Company's assessment) is expected to be provided substantially through the operation or sale of collateral and the borrower is experiencing financial difficulty, the following table presents the loans and the corresponding individually assessed allowance for credit losses by class of financing receivable. Significant changes in individually assessed reserves are due to changes in the valuation of the underlying collateral in addition to changes in accrual and past due status.


	September 30, 2021
	Type of Collateral
	Real Estate		Financial Assets and Equipment		Individually assessed allowance for credit loss
Commercial and industrial	$	635	$	2,166	$	123
Construction	4,597		—		112
Residential real estate:
1-to-4 family mortgage	375		—		—
Residential line of credit	1,123		—		7

Commercial real estate:
Owner occupied	7,808		—		167
Non-owner occupied	11,430		—		624
Consumer and other	26		—		2
Total	$	25,994	$	2,166	$	1,035


	December 31, 2020
	Type of Collateral
	Real Estate		Financial Assets and Equipment		Individually assessed allowance for credit loss
Commercial and industrial	$	—	$	1,728	$	117
Construction	3,877		—		—
Residential real estate:
1-to-4 family mortgage	226		—		—
Residential line of credit	1,174		—		9

Commercial real estate:
Owner occupied	3,391		—		30
Non-owner occupied	8,164		—		1,531

Total	$	16,832	$	1,728	$	1,687

Schedule of Financing Receivables Under Deferral Program

The following table outlines the Company's recorded investment and percentage of loans held for investment by class of financing receivable for executed deferrals remaining on deferral status as of September 30, 2021 or December 31, 2020, in connection with Company's COVID-19 relief programs. These deferrals typically ranged from sixty to ninety days per deferral and the majority were not considered TDRs under the interagency regulatory guidance or CARES Act, issued in March 2020. Section 541 of the Consolidated Appropriations Act extended this relief to the earlier of January 1, 2022 or 60 days after the national emergency termination date. As of September 30, 2021 and December 31, 2020, the Company had a recorded investment in loans totaling $1,331,538 and $1,399,088 previously deferred that were no longer in deferral status.


	September 30, 2021				December 31, 2020
				% of Loans					% of Loans
Commercial and industrial		$	—		—	%	$	7,118		0.5	%
Construction		—			—	%	1,918			0.2	%
Residential real estate:
1-to-4 family mortgage		—			—	%	19,201			1.8	%
Residential line of credit		—			—	%	204			—	%
Multi-family mortgage		—			—	%	3,305			1.9	%
Commercial real estate:
Owner occupied		—			—	%	19,815			2.1	%
Non-owner occupied		17,953			1.1	%	139,590			8.7	%
Consumer and other		—			—	%	11,366			3.6	%
Total		$	17,953		0.2	%	$	202,517		2.9	%

Other real estate owned (Tables)

9 Months Ended

Sep. 30, 2021

Real Estate [Abstract]

Schedule of Other Real Estate Owned

The following table summarizes the other real estate owned for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
Balance at beginning of period	$	11,986	$	15,091	$	12,111	$	18,939
Transfers from loans	349		573		4,945		1,579
Transfers to premises and equipment	—		—		—		(841)

Proceeds from sale of other real estate owned	(4,173)		(1,411)		(8,834)		(5,561)
Gain on sale of other real estate owned	2,090		119		3,190		464
Loans provided for sales of other real estate owned	(152)		—		(685)		—
Write-downs and partial liquidations	(85)		(1,624)		(712)		(1,832)
Balance at end of period	$	10,015	$	12,748	$	10,015	$	12,748

Leases (Tables)

9 Months Ended

Sep. 30, 2021

Leases [Abstract]

Schedule of Information Related to Company's Leases and Lease Expense

Information related to the Company's leases is presented below as of September 30, 2021 and December 31, 2020:


		September 30,			December 31,
	Classification	2021			2020
Right-of-use assets:
Operating leases	Operating lease right-of-use assets	$	44,006		$	49,537
Finance leases	Premises and equipment, net	1,505			1,588
Total right-of-use assets		$	45,511		$	51,125
Lease liabilities:
Operating leases	Operating lease liabilities	$	48,875		$	55,187
Finance leases	Borrowings	1,532			1,598
Total lease liabilities		$	50,407		$	56,785
Weighted average remaining lease term (in years) - operating		12.4			12.2
Weighted average remaining lease term (in years) - finance		13.6			14.4
Weighted average discount rate - operating		2.72		%	2.65		%
Weighted average discount rate - finance		1.76		%	1.76		%

The components of total lease expense included in the consolidated statements of income were as follows:


		Three Months Ended				Nine Months Ended
		September 30,				September 30,
	Classification	2021		2020			2021		2020
Operating lease costs:
Amortization of right-of-use asset	Occupancy and equipment	$	1,838	$	1,663		$	5,948	$	4,341
Short-term lease cost	Occupancy and equipment	107		95			296		261
Variable lease cost	Occupancy and equipment	284		78			760		376

Gain on lease modifications and terminations	Occupancy and equipment	(14)		—			(801)		—
Finance lease costs:
Interest on lease liabilities	Interest expense on borrowings	7		—			21		—
Amortization of right-of-use asset	Occupancy and equipment	28		—			83		—
Total lease cost		$	2,250	$	1,836		$	6,307	$	4,978

Schedule of Maturity Analysis of Operating Lease Liabilities

A maturity analysis of operating and finance lease liabilities and a reconciliation of undiscounted cash flows to the total lease liability as of September 30, 2021 is as follows:


	Operating		Finance
	Leases		Lease
Lease payments due:
September 30, 2022	$	7,434	$	116
September 30, 2023	6,110		117
September 30, 2024	5,180		119
September 30, 2025	4,765		121
September 30, 2026	4,637		123
Thereafter	29,784		1,133
Total undiscounted future minimum lease payments	57,910		1,729
Less: imputed interest	(9,035)		(197)
Lease liability	$	48,875	$	1,532

Schedule of Maturity of Finance Lease Liabilities

A maturity analysis of operating and finance lease liabilities and a reconciliation of undiscounted cash flows to the total lease liability as of September 30, 2021 is as follows:


	Operating		Finance
	Leases		Lease
Lease payments due:
September 30, 2022	$	7,434	$	116
September 30, 2023	6,110		117
September 30, 2024	5,180		119
September 30, 2025	4,765		121
September 30, 2026	4,637		123
Thereafter	29,784		1,133
Total undiscounted future minimum lease payments	57,910		1,729
Less: imputed interest	(9,035)		(197)
Lease liability	$	48,875	$	1,532

Mortgage servicing rights (Tables)

9 Months Ended

Sep. 30, 2021

Transfers and Servicing of Financial Assets [Abstract]

Schedule of Changes in Mortgage Servicing Rights

Changes in the Company’s mortgage servicing rights were as follows for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020


Carrying value at beginning of period	$	101,615	$	60,508	$	79,997	$	75,521
Capitalization	9,215		18,202		31,382		33,415

Mortgage servicing rights acquired from Franklin, at fair value	—		4,850		—		4,850



Change in fair value:
Due to pay-offs/pay-downs	(7,302)		(7,756)		(24,488)		(19,676)
Due to change in valuation inputs or assumptions	7,063		581		23,700		(22,575)
Carrying value at end of period	$	110,591	$	71,535	$	110,591	$	71,535

Schedule of Servicing Income and Expense Included in Mortgage Banking Income

The following table summarizes servicing income and expense, which are included in 'Mortgage banking income' and 'Other noninterest expense', respectively, within the Mortgage segment operating results for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Servicing income:
Servicing income	$	7,539	$	5,536	$	21,258	$	15,667
Change in fair value of mortgage servicing rights	(239)		(7,175)		(788)		(42,251)
Change in fair value of derivative hedging instruments	(2,128)		(265)		(9,987)		15,705
Servicing income (loss)	5,172		(1,904)		10,483		(10,879)
Servicing expenses	2,156		1,999		7,381		5,392
Net servicing income (loss)(1)	$	3,016	$	(3,903)	$	3,102	$	(16,271)

(1) Excludes benefit of custodial servicing related noninterest-bearing deposits held by the Bank.

Schedule of Data and Key Economic Assumptions Related to Mortgage Servicing Rights

Data and key economic assumptions related to the Company’s mortgage servicing rights as of September 30, 2021 and December 31, 2020 are as follows:


	September 30,			December 31,
	2021			2020
Unpaid principal balance	$	10,633,805		$	9,787,657
Weighted-average prepayment speed (CPR)	9.46		%	14.07		%
Estimated impact on fair value of a 10% increase	$	(4,737)		$	(4,493)
Estimated impact on fair value of a 20% increase	$	(9,107)		$	(8,599)
Discount rate	11.56		%	11.49		%
Estimated impact on fair value of a 100 bp increase	$	(4,454)		$	(2,942)
Estimated impact on fair value of a 200 bp increase	$	(8,571)		$	(5,674)
Weighted-average coupon interest rate	3.29		%	3.58		%
Weighted-average servicing fee (basis points)	27			28
Weighted-average remaining maturity (in months)	330			328

Income taxes (Tables)

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Schedule of Allocation of Federal and State Income Taxes between Current and Deferred Portions

An allocation of federal and state income taxes between current and deferred portions is presented below:


	Three Months Ended September 30,
	2021		2020
Current	$	2,350	$	13,123
Deferred	7,366		(15,163)
Total	$	9,716	$	(2,040)

	Nine Months Ended September 30,
	2021		2020
Current	$	17,840	$	37,038
Deferred	20,904		(31,543)
Total	$	38,744	$	5,495

Schedule of Reconciliation of Income Taxes Computed at the United States Federal Statutory Tax Rates to the Provision for Income Taxes

The following table presents a reconciliation of federal income taxes at the statutory federal rate of 21% to the Company's effective tax rates for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,
	2021				2020
Federal taxes calculated at statutory rate	$	11,551	21.0	%	$	(1,604)	21.0	%
Increase (decrease) resulting from:
State taxes, net of federal benefit	3,279		6.0	%	100		(1.3)	%


(Benefit) expense from equity based compensation	(1,784)		(3.2)	%	(7)		0.1	%
Municipal interest income, net of interest disallowance	(416)		(0.8)	%	(422)		5.5	%
Bank owned life insurance	(74)		(0.1)	%	(55)		0.7	%
NOL Carryback provision under CARES Act	(3,424)		(6.2)	%
Merger and offering costs	—		—	%	126		(1.6)	%
Section 162(m) limitation	1,065		1.9	%	—		—	%
Other	(481)		(0.9)	%	(178)		2.3	%
Income tax expense, as reported	$	9,716	17.7	%	$	(2,040)	26.7	%

	Nine Months Ended September 30,
	2021				2020
Federal taxes calculated at statutory rate	$	37,844	21.0	%	$	4,938	21.0	%
Increase (decrease) resulting from:
State taxes, net of federal benefit	6,908		3.8	%	1,266		5.4	%
(Benefit) expense from equity based compensation	(2,129)		(1.2)	%	154		0.7	%
Municipal interest income, net of interest disallowance	(1,259)		(0.7)	%	(996)		(4.2)	%
Bank owned life insurance	(240)		(0.1)	%	(90)		(0.4)	%
NOL Carryback provision under CARES Act	(3,424)		(1.9)	%
Merger and offering costs	127		0.1	%	289		1.2	%
Section 162(m) limitation	1,313		0.7	%			—	%
Other	(396)		(0.2)	%	(66)		(0.3)	%
Income tax expense, as reported	$	38,744	21.5	%	$	5,495	23.4	%

Schedule of Net Deferred Tax Assets

The components of the net deferred tax assets at September 30, 2021 and December 31, 2020, are as follows:


	September 30,		December 31
	2021		2020
Deferred tax assets:
Allowance for credit losses	$	38,751	$	48,409
Operating lease liabilities	13,134		14,496
Federal net operating loss	1,541		1,753

Deferred compensation	6,798		8,872


Unrealized loss on cash flow hedges	326		499
Other	13,886		19,101
Subtotal	74,436		93,130
Deferred tax liabilities:
FHLB stock dividends	$	(484)	$	(561)
Operating leases - right of use assets	(11,726)		(13,197)
Depreciation	(7,276)		(7,491)
Amortization of core deposit intangibles	(200)		(684)
Unrealized gain on equity securities	(3,879)		(17)

Unrealized gain on debt securities	(3,913)		(13,027)
Mortgage servicing rights	(28,774)		(20,803)
Goodwill	(13,133)		(11,301)
Other	(4,407)		(9,653)
Subtotal	(73,792)		(76,734)
Net deferred tax assets	$	644	$	16,396

Commitments and contingencies (Tables)

9 Months Ended

Sep. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of Financial Instruments with Off-Balance Sheet Credit Risk


	September 30,		December 31,
	2021		2020
Commitments to extend credit, excluding interest rate lock commitments	$	2,826,186	$	2,719,996
Letters of credit	63,698		67,598
Balance at end of period	$	2,889,884	$	2,787,594

Schedule of Allowance of Credit Losses on Unfunded Commitments

The table below presents activity within the allowance for credit losses on unfunded commitments included in accrued expenses and other liabilities on the Company's consolidated balance sheets for the three and nine months ended September 30, 2021 and 2020:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Balance at beginning of period	$	13,202	$	6,500	$	16,378	$	—
Impact of CECL adoption on provision for credit losses on unfunded commitments	—		—		—		2,947
Increase in provision for credit losses from unfunded commitments acquired in business combination	—		10,429		—		10,499
Provision for credit losses on unfunded commitments	301		(862)		(2,875)		2,621
Balance at end of period	$	13,503	$	16,067	$	13,503	$	16,067

Schedule of Activity in the Repurchase Reserve

The following table summarizes the activity in the repurchase reserve included in accrued expenses and other liabilities on the Company's consolidated balance sheets:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Balance at beginning of period	$	5,489	$	4,601	$	5,928	$	3,529
Provision for loan repurchases or indemnifications	—		901		(266)		2,128

Losses on loans repurchased or indemnified	(120)		(44)		(293)		(199)
Balance at end of period	$	5,369	$	5,458	$	5,369	$	5,458

Derivatives (Tables)

9 Months Ended

Sep. 30, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Financial Instruments

The following tables provide details on the Company’s derivative financial instruments as of the dates presented:


	September 30, 2021
	Notional Amount		Asset		Liability
Not designated as hedging:
Interest rate contracts	$	611,188	$	22,456	$	22,301
Forward commitments	1,404,819		6,526		—
Interest rate-lock commitments	738,201		9,804		—
Futures contracts	491,800		—		4,758

Total	$	3,246,008	$	38,786	$	27,059


	December 31, 2020
	Notional Amount		Asset		Liability
Not designated as hedging:
Interest rate contracts	$	606,878	$	34,547	$	34,317
Forward commitments	1,358,328		—		11,633
Interest rate-lock commitments	1,191,621		34,391		—
Futures contracts	375,400		—		383

Total	$	3,532,227	$	68,938	$	46,333


	September 30, 2021
	Notional Amount		Asset		Liability
Designated as hedging:
Interest rate swaps	$	30,000	$	—	$	1,247


	December 31, 2020
	Notional Amount		Asset		Liability
Designated as hedging:
Interest rate swaps	$	30,000	$	—	$	1,909

Schedule of Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments

Gains (losses) included in the consolidated statements of income related to the Company’s derivative financial instruments were as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Not designated as hedging instruments (included in mortgage banking income):
Interest rate lock commitments	$	(3,316)	$	5,994	$	(24,587)	$	35,997
Forward commitments	(806)		(16,548)		23,252		(56,998)
Futures contracts	(2,152)		(587)		(9,380)		10,955

Total	$	(6,274)	$	(11,141)	$	(10,715)	$	(10,046)


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Designated as hedging:
Amount of gain reclassified from other comprehensive income and recognized in interest expense on borrowings, net of taxes of $0, $41, $0, and $145	$	—	$	115	$	—	$	410
Loss included in interest expense on borrowings	(148)		(137)		(428)		(211)
Total	$	(148)	$	(22)	$	(428)	$	199

The following discloses the amount included in other comprehensive income, net of tax, for derivative instruments designated as cash flow hedges for the periods presented:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Designated as hedging:
Amount of gain (loss) recognized in other comprehensive income, net of tax $38, $40, $173, and $(403)	$	106	$	112	$	489	$	(1,145)

Schedule of Offsetting Assets

The following table presents the Company's gross derivative positions as recognized in the consolidated balance sheets as well as the net derivative positions, including collateral pledged to the extent the application of such collateral did not reduce the net derivative liability position below zero, had the Company elected to offset those instruments subject to an enforceable master netting agreement:


	Offsetting Derivative Assets				Offsetting Derivative Liabilities
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Gross amounts recognized	$	4,813	$	3,863	$	19,467	$	34,051
Gross amounts offset in the consolidated balance sheets	—		—		—		—
Net amounts presented in the consolidated balance sheets	4,813		3,863		19,467		34,051

Gross amounts not offset in the consolidated balance sheets
Less: financial instruments	3,816		857		3,816		857
Less: financial collateral pledged	—		—		15,651		33,194
Net amounts	$	997	$	3,006	$	—	$	—

Schedule of Offsetting Liabilities

The following table presents the Company's gross derivative positions as recognized in the consolidated balance sheets as well as the net derivative positions, including collateral pledged to the extent the application of such collateral did not reduce the net derivative liability position below zero, had the Company elected to offset those instruments subject to an enforceable master netting agreement:


	Offsetting Derivative Assets				Offsetting Derivative Liabilities
	September 30, 2021		December 31, 2020		September 30, 2021		December 31, 2020
Gross amounts recognized	$	4,813	$	3,863	$	19,467	$	34,051
Gross amounts offset in the consolidated balance sheets	—		—		—		—
Net amounts presented in the consolidated balance sheets	4,813		3,863		19,467		34,051

Gross amounts not offset in the consolidated balance sheets
Less: financial instruments	3,816		857		3,816		857
Less: financial collateral pledged	—		—		15,651		33,194
Net amounts	$	997	$	3,006	$	—	$	—

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41620-113959

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41638-113959

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41678-113959

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41641-113959

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579240-113959

+ Details

Fair value of financial instruments (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Estimated Fair Values and Carrying Values of Financial Instruments

The following table contains the estimated fair values and the related carrying values of the Company's financial instruments. Items which are not financial instruments are not included.


	Fair Value
September 30, 2021	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	1,324,564	$	1,324,564	$	—	$	—	$	1,324,564
Investment securities	1,577,337		—		1,577,337		—		1,577,337

Loans, net	7,155,228		—		—		7,255,887		7,255,887
Loans held for sale	855,706		—		755,210		100,496		855,706
Interest receivable	41,393		30		6,448		34,915		41,393
Mortgage servicing rights	110,591		—		—		110,591		110,591
Derivatives	38,786		—		38,786		—		38,786
Financial liabilities:
Deposits:
Without stated maturities	$	8,884,429	$	8,884,429	$	—	$	—	$	8,884,429
With stated maturities	1,187,489		—		1,196,141		—		1,196,141
Securities sold under agreement to repurchase and federal funds sold	41,730		41,730		—		—		41,730

Subordinated debt	129,448		—		—		134,668		134,668
Other borrowings	1,532		—		1,532		—		1,532
Interest payable	2,394		138		1,873		383		2,394
Derivatives	28,306		—		28,306		—		28,306


	Fair Value
December 31, 2020	Carrying amount		Level 1		Level 2		Level 3		Total
Financial assets:
Cash and cash equivalents	$	1,317,898	$	1,317,898	$	—	$	—	$	1,317,898
Investment securities	1,176,991		—		1,176,991		—		1,176,991

Loans, net	6,912,570		—		—		7,058,693		7,058,693
Loans held for sale	899,173		—		683,770		215,403		899,173
Interest receivable	43,603		33		5,254		38,316		43,603
Mortgage servicing rights	79,997		—		—		79,997		79,997
Derivatives	68,938		—		68,938		—		68,938
Financial liabilities:
Deposits:
Without stated maturities	$	8,020,783	$	8,020,783	$	—	$	—	$	8,020,783
With stated maturities	1,437,254		—		1,446,605		—		1,446,605
Securities sold under agreement to repurchase and federal funds sold	32,199		32,199		—		—		32,199

Subordinated debt	189,527		—		—		192,149		192,149
Other borrowings	16,598		—		16,598		—		16,598
Interest payable	6,772		327		4,210		2,235		6,772
Derivatives	48,242		—		48,242		—		48,242

Schedule of Balances and Levels of Assets Measured at Fair Value on Recurring Basis

The balances and levels of the assets measured at fair value on a recurring basis at September 30, 2021 are presented in the following table:


At September 30, 2021	Quoted prices in active markets for identical assets (liabilities) (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)		Total
Recurring valuations:
Financial assets:
Available-for-sale securities:
U.S. government agency securities	$	—	$	10,571	$	—	$	10,571
Mortgage-backed securities - residential	—		1,210,503		—		1,210,503
Mortgage-backed securities - commercial	—		15,712		—		15,712
Municipal securities	—		327,239		—		327,239
Treasury securities	—		6,006		—		6,006
Corporate securities	—		2,527		—		2,527
Equity securities	—		4,779		—		4,779
Total securities	$	—	$	1,577,337	$	—	$	1,577,337
Loans held for sale	—		755,210		100,496		855,706
Mortgage servicing rights	—		—		110,591		110,591
Derivatives	—		38,786		—		38,786
Financial Liabilities:
Derivatives	—		28,306		—		28,306

The balances and levels of the assets measured at fair value on a recurring basis at December 31, 2020 are presented in the following table:


At December 31, 2020	Quoted prices in active markets for identical assets (liabilities) (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)		Total
Recurring valuations:
Financial assets:
Available-for-sale securities:
U.S. government agency securities	$	—	$	2,003	$	—	$	2,003
Mortgage-backed securities - residential	—		773,336		—		773,336
Mortgage-backed securities - commercial	—		21,588		—		21,588
Municipals, tax-exempt	—		356,329		—		356,329
Treasury securities	—		16,628		—		16,628
Corporate securities	—		2,516		—		2,516
Equity securities	—		4,591		—		4,591
Total securities	$	—	$	1,176,991	$	—	$	1,176,991
Loans held for sale	$	—	$	683,770	$	215,403	$	899,173
Mortgage servicing rights	—		—		79,997		79,997
Derivatives	—		68,938		—		68,938
Financial Liabilities:
Derivatives	—		48,242		—		48,242

Schedule of Balances and Levels of Assets Measured at Fair Value on Non-recurring Basis

The balances and levels of the assets measured at fair value on a non-recurring basis at September 30, 2021 are presented in the following table:


At September 30, 2021	Quoted prices in active markets for identical assets (liabilities (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)		Total
Non-recurring valuations:
Financial assets:
Other real estate owned	$	—	$	—	$	6,192	$	6,192
Collateral dependent loans:
Commercial and industrial	$	—	$	—	$	101	$	101
Construction	—		—		606		606
Residential real estate:

Residential line of credit	—		—		311		311

Commercial real estate:
Owner occupied	—		—		315		315
Non-owner occupied	—		—		4,527		4,527
Consumer and other	—		—		24		24
Total collateral dependent loans	$	—	$	—	$	5,884	$	5,884

The balances and levels of the assets measured at fair value on a non-recurring basis at December 31, 2020 are presented in the following table:


At December 31, 2020	Quoted prices in active markets for identical assets (liabilities) (level 1)		Significant other observable inputs (level 2)		Significant unobservable inputs (level 3)		Total
Non-recurring valuations:
Financial assets:
Other real estate owned	$	—	$	—	$	6,662	$	6,662
Collateral dependent loans:
Commercial and industrial	$	—	$	—	$	684	$	684

Residential real estate:

Residential line of credit	—		—		311		311
Commercial real estate:
Owner occupied	—		—		136		136
Non-owner occupied	—		—		5,022		5,022

Total collateral dependent loans	$	—	$	—	$	6,153	$	6,153

Schedule of Information About Significant Unobservable Inputs (Level 3) Used in Valuation of Assets Measured at Fair Value on Nonrecurring Basis

The following tables present information as of September 30, 2021 and December 31, 2020 about significant unobservable inputs (Level 3) used in the valuation of assets measured at fair value on a nonrecurring basis:

As of September 30, 2021

Financial instrument

Fair Value

Valuation technique

Significant
unobservable inputs

Range of
inputs

Collateral dependent loans

$

5,884

Valuation of collateral

Discount for comparable sales

0%-30%

Other real estate owned

$

6,192

Appraised value of property less costs to sell

Discount for costs to sell

0%-15%

As of December 31, 2020

Financial instrument

Fair Value

Valuation technique

Significant
unobservable inputs

Range of
inputs

Collateral dependent loans

$

6,153

Valuation of collateral

Discount for comparable sales

0%-30%

Other real estate owned

$

6,662

Appraised value of property less costs to sell

Discount for costs to sell

0%-15%

Schedule of Loans Held For Sale at Fair Value

The following table summarizes the Company's loans held for sale, at fair value, as of the dates presented:


	September 30,		December 31,
	2021		2020
Commercial and industrial	$	100,496	$	215,403
Residential real estate:
1-4 family mortgage	755,210		683,770
Total loans held for sale	$	855,706	$	899,173

Schedule of Changes in Associated with Commercial Loans Held For Sale

The following table sets forth the changes in fair value associated with this portfolio.


	Three Months Ended September 30, 2021
	Principal Balance		Fair Value Discount		Fair Value
Carrying value at beginning of period	$	135,972	$	(11,850)	$	124,122
Change in fair value:
Pay-downs and pay-offs	(24,366)		—		(24,366)

Changes in valuation included in other noninterest income	—		740		740
Carrying value at end of period	$	111,606	$	(11,110)	$	100,496

	Nine Months Ended September 30, 2021
	Principal Balance		Fair Value Discount		Fair Value
Carrying value at beginning of period	$	239,063	$	(23,660)	$	215,403
Change in fair value:
Pay-downs and pay-offs	(116,158)		—		(116,158)
Write-offs to discount	(11,299)		11,299		—
Changes in valuation included in other noninterest income	—		1,251		1,251
Carrying value at end of period	$	111,606	$	(11,110)	$	100,496

	Three Months Ended September 30, 2020
	Principal balance		Fair Value discount		Fair Value
Carrying value at beginning of period	$	—	$	—	$	—
Commercial loans held for sale acquired from Franklin	350,269		(24,063)		326,206
Change in fair value:
Pay-downs and pay-offs	(86,808)		—		(86,808)

Changes in valuation included in other noninterest income			1,858		1,858
Carrying value at end of period	$	263,461	$	(22,205)	$	241,256


	Nine Months ended September 30, 2020
	Principal balance		Fair Value discount		Fair Value
Carrying value at beginning of period	$	—	$	—	$	—
Commercial loans held for sale acquired from Franklin	350,269		(24,063)		326,206
Change in fair value:
Pay-downs and pay-offs	(86,808)		—		(86,808)

Changes in valuation included in other noninterest income	—		1,858		1,858
Carrying value at end of period	$	263,461	$	(22,205)	$	241,256

Schedule of Differences between Fair Value and Principal Balance for Loans Held for Sale Measured at Fair Value

The following table summarizes the differences between the fair value and the principal balance for loans held for sale and nonaccrual loans measured at fair value as of September 30, 2021 and December 31, 2020:


September 30, 2021	Aggregate fair value		Aggregate Unpaid Principal Balance		Difference
Mortgage loans held for sale measured at fair value	$	755,210	$	738,221	$	16,989
Commercial loans held for sale measured at fair value	94,871		100,914		(6,043)

Nonaccrual loans	5,625		10,692		(5,067)

December 31, 2020
Mortgage loans held for sale measured at fair value	$	683,770	$	651,887	$	31,883
Commercial loans held for sale measured at fair value	208,914		226,867		(17,953)
Past due loans of 90 days or more	83		163		(80)
Nonaccrual loans	6,406		12,033		(5,627)

Segment reporting (Tables)

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Schedule of Segment Financial Information

The following tables provide segment financial information for three and nine months ended September 30, 2021 and 2020 as follows:


Three Months Ended September 30, 2021	Banking		Mortgage		Consolidated
Net interest income	$	88,576	$	(100)	$	88,476
Provisions for credit losses(1)	(2,531)		—		(2,531)
Mortgage banking income(2)	—		47,751		47,751
Change in fair value of mortgage servicing rights, net of hedging(2)	—		(2,367)		(2,367)
Other noninterest income	13,823		(201)		13,622
Depreciation and amortization	1,791		349		2,140
Amortization of intangibles	1,344		—		1,344

Other noninterest expense	55,642		35,881		91,523
Income before income taxes	$	46,153	$	8,853	$	55,006
Income tax expense					9,716
Net income applicable to FB Financial Corporation and noncontrolling interest					45,290
Net income applicable to noncontrolling interest(3)					—
Net income applicable to FB Financial Corporation					$	45,290
Total assets	$	10,712,281	$	1,098,009	$	11,810,290
Goodwill	242,561		—		242,561

(1)Included $301 in provision for credit losses on unfunded commitments.

(2)Change in fair value of mortgage servicing rights, net of hedging is included in mortgage banking income in the Company's consolidated statements of income.

(3)Banking segment includes noncontrolling interest.


Three Months Ended September 30, 2020	Banking		Mortgage		Consolidated
Net interest income	$	68,791	$	37	$	68,828
Provisions for credit losses(1)	55,401		—		55,401
Mortgage banking income(2)	—		92,126		92,126
Change in fair value of mortgage servicing rights, net of hedging(2)	—		(7,440)		(7,440)
Other noninterest income	12,340		—		12,340
Depreciation and amortization	1,550		273		1,823
Amortization of intangibles	1,417		—		1,417

Other noninterest expense(3)	69,568		45,284		114,852
(Loss) income before income taxes	$	(46,805)	$	39,166	$	(7,639)
Income tax benefit					(2,040)
Net loss applicable to FB Financial Corporation and noncontrolling interest					(5,599)
Net income applicable to noncontrolling interest(4)					—
Net loss applicable to FB Financial Corporation					$	(5,599)
Total assets	$	10,143,956	$	866,482	$	11,010,438
Goodwill	236,086		—		236,086

(1)Included $9,567 in provision for credit losses on unfunded commitments.

(2)Change in fair value of mortgage servicing rights, net of hedging is included in mortgage banking income in the Company's consolidated statements of income.

(3)Included $20,400 of merger costs in the Banking Segment primarily related to the acquisition and integration of Franklin and $330 of merger costs in the Mortgage segment related to the Franklin merger.

(4)Banking segment includes noncontrolling interest.


Nine Months Ended September 30, 2021	Banking		Mortgage		Consolidated
Net interest income	$	257,726	$	(111)	$	257,615
Provisions for credit losses(1)	(30,224)		—		(30,224)
Mortgage banking income(2)	—		146,990		146,990
Change in fair value of mortgage servicing rights, net of hedging(2)	—		(10,775)		(10,775)
Other noninterest income	39,223		(402)		38,821
Depreciation and amortization	5,267		1,021		6,288
Amortization of intangibles	4,178		—		4,178

Other noninterest expense	163,261		108,938		272,199
Income before income taxes	$	154,467	$	25,743	$	180,210
Income tax expense					38,744
Net income applicable to FB Financial Corporation and noncontrolling interest					141,466
Net income applicable to noncontrolling interest(3)					8
Net income applicable to FB Financial Corporation					$	141,458
Total assets	$	10,712,281	$	1,098,009	$	11,810,290
Goodwill	242,561		—		242,561

(1)Included $(2,875) in provision for credit losses on unfunded commitments.

(2)Change in fair value of mortgage servicing rights, net of hedging is included in mortgage banking income in the Company's consolidated statements of income.

(3)Banking segment includes noncontrolling interest.


Nine Months Ended September 30, 2020	Banking		Mortgage		Consolidated
Net interest income	$	180,374	$	40	$	180,414
Provisions for credit losses(1)	110,887		—		110,887
Mortgage banking income(2)	—		216,145		216,145
Change in fair value of mortgage servicing rights, net of hedging(2)	—		(26,546)		(26,546)
Other noninterest income	31,618		—		31,618
Depreciation and amortization	4,545		770		5,315
Amortization of intangibles	3,825		—		3,825

Other noninterest expense(3)	150,022		108,068		258,090
(Loss) income before income taxes	$	(57,287)	$	80,801	$	23,514
Income tax expense					5,495


Net income applicable to FB Financial Corporation and noncontrolling interest					18,019
Net income applicable to noncontrolling interest(4)					—
Net income applicable to FB Financial Corporation					$	18,019
Total assets	$	10,143,956	$	866,482	$	11,010,438
Goodwill	236,086		—		236,086

(1)Includes $13,050 in provision for credit losses on unfunded commitments.

(2)Change in fair value of mortgage servicing rights, net of hedging is included in mortgage banking income in the Company's consolidated statements of income.

(3)Includes $25,036 of merger costs in the Banking segment related to the Farmers National acquisition and the Franklin merger and $330 of merger costs in the Mortgage segment related to the Franklin merger.

(4)Banking segment includes noncontrolling interest.

Minimum capital requirements (Tables)

9 Months Ended

Sep. 30, 2021

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of Actual and Required Capital Amounts and Ratios

Actual and required capital amounts and ratios are included below as of the dates indicated.


	Actual				Minimum Capital adequacy with capital buffer			To be well capitalized under prompt corrective action provisions
	Amount		Ratio			Amount		Ratio		Amount		Ratio
September 30, 2021
Total Capital (to risk-weighted assets)
FB Financial Corporation	$	1,400,521	14.6	%		$	1,005,220	10.5	%	N/A		N/A
FirstBank	1,352,956		14.2	%		1,003,252		10.5	%	$	955,478	10.0	%
Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,213,432	12.7	%		$	813,750	8.5	%	N/A		N/A
FirstBank	1,165,867		12.2	%		812,156		8.5	%	$	764,382	8.0	%
Tier 1 Capital (to average assets)
FB Financial Corporation	$	1,213,432	10.4	%		$	467,369	4.0	%	N/A		N/A
FirstBank	1,165,867		10.0	%		465,817		4.0	%	$	582,271	5.0	%
Common Equity Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,183,432	12.4	%		$	670,147	7.0	%	N/A		N/A
FirstBank	1,165,867		12.2	%		668,835		7.0	%	$	621,061	6.5	%


	Actual				Minimum Capital adequacy with capital buffer			To be well capitalized under prompt corrective action provisions
	Amount		Ratio			Amount		Ratio		Amount		Ratio
December 31, 2020
Total Capital (to risk-weighted assets)
FB Financial Corporation	$	1,358,897	15.0	%		$	952,736	10.5	%	N/A		N/A
FirstBank	1,353,279		14.9	%		951,327		10.5	%	$	906,026	10.0	%
Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,090,364	12.0	%		$	771,262	8.5	%	N/A		N/A
FirstBank	1,142,548		12.6	%		770,122		8.5	%	$	724,820	8.0	%
Tier 1 Capital (to average assets)
FB Financial Corporation	$	1,090,364	10.0	%		$	435,064	4.0	%	N/A		N/A
FirstBank	1,142,548		10.5	%		435,279		4.0	%	$	544,098	5.0	%
Common Equity Tier 1 Capital (to risk-weighted assets)
FB Financial Corporation	$	1,060,364	11.7	%		$	635,157	7.0	%	N/A		N/A
FirstBank	1,142,548		12.6	%		634,218		7.0	%	$	588,917	6.5	%

Stock-based compensation (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Changes in Restricted Stock Units

The following table summarizes information about the changes in restricted stock units as of the dates indicated:


	Nine Months Ended September 30,
	2021			2020
	Restricted Stock Units Outstanding	Weighted Average Grant Date Fair Value		Restricted Stock Units Outstanding	Weighted Average Grant Date Fair Value
Balance at beginning of period	1,047,071	$	26.06	826,263	$	23.76
Granted(1)	194,388	43.06		353,891	31.12
Vested	(699,156)	22.80		(145,157)	31.67
Forfeited	(34,298)	28.06		(19,269)	33.19
Balance at end of period	508,005	$	36.01	1,015,728	$	25.83

(1) 2020 includes 118,776 restricted stock units issued in replacement of those initially granted by Franklin. See Note 2 for additional information.

Schedule of Changes in Performance Stock Units

The following table summarizes information about the changes in performance stock units as of and for the nine months ended September 30, 2021 and 2020.




	Nine Months Ended September 30,
	2021			2020
	Performance Stock Units Outstanding	Weighted Average Grant Date Fair Value		Performance Stock Units Outstanding	Weighted Average Grant Date Fair Value
Balance at beginning of period (unvested)	53,147	$	36.21	—	$	—
Granted	65,304	43.20		53,147	36.21
Vested	—	—		—	—
Forfeited or expired	(2,319)	36.73		—	—
Balance at end of period (unvested)	116,132	$	40.13	53,147	$	36.21

Related party transactions (Tables)

9 Months Ended

Sep. 30, 2021

Schedule of Loans Analysis to Executive Officers, Certain Management, Bank Directors and Their Affiliates

An analysis of loans to executive officers, certain management, and directors of the Bank and their affiliates is presented below:


Loans outstanding at January 1, 2021	$	24,675
New loans and advances	12,116
Change in related party status	(108)
Repayments	(5,939)
Loans outstanding at September 30, 2021	$	30,744

Basis of presentation - Narrative (Details)	Sep. 30, 2021 branch
Accounting Policies [Abstract]
Number of full-service branches	82

Basis of presentation - Basic and Diluted Earnings Per Common Share Calculation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic earnings (loss) per common share calculation:
Net income (loss) applicable to FB Financial Corporation	$ 45,290	$ (5,599)	$ 141,458	$ 18,019
Dividends paid on and undistributed earnings allocated to participating securities	0	0	0	0
Earnings (loss) available to common shareholders	$ 45,290	$ (5,599)	$ 141,458	$ 18,019
Weighted average basic shares outstanding (in shares)	47,412,214	40,154,841	47,345,984	34,404,064
Basic earnings (loss) per common share (in dollars per share)	$ 0.96	$ (0.14)	$ 2.99	$ 0.52
Diluted earnings per common share:
Earnings (loss) available to common shareholders	$ 45,290	$ (5,599)	$ 141,458	$ 18,019
Weighted average basic shares outstanding (in shares)	47,412,214	40,154,841	47,345,984	34,404,064
Weighted average diluted shares contingently issuable (in shares)	594,933	482,904	637,510	436,228
Weighted average diluted shares outstanding (in shares)	48,007,147	40,637,745	47,983,494	34,840,292
Diluted (loss) earnings per common share (in dollars per share)	$ 0.94	$ (0.14)	$ 2.95	$ 0.52
Restricted Stock Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Restricted stock units outstanding considered to be antidilutive (in shares)	15,974	332,347	20,448	536,908

Mergers and acquisitions - Franklin Financial Network, Inc. - Narrative (Details) - Franklin $ / shares in Units, $ in Thousands	Aug. 15, 2020 USD ($) branch $ / shares shares
Business Acquisition [Line Items]
Assets assumed in acquisition	$ 3,631,889
Loans assumed in acquisition	2,790,000
Deposits assumed in acquisition	3,121,731
Non-strategic loans assumed in acquisition	$ 326,206
Business acquisition, shares issued (in shares) \| shares	15,058,181
Equivalent value of parent stock (in shares) \| shares	44,311
Cash consideration paid	$ 31,330
Fair value replacement awards attributable to pre-combination service	$ 674
Business acquisition, share price (in dollars per share) \| $ / shares	$ 29.52
Purchase price	$ 477,830
Goodwill resulting from merger	$ 67,191
Tennessee
Business Acquisition [Line Items]
Number of branches acquired \| branch	10

Mergers and acquisitions - Consideration for Franklin Financial Network (Details) $ / shares in Units, $ in Thousands	Aug. 15, 2020 USD ($) $ / shares shares
Business Combination, Consideration Transferred [Abstract]
Shares and net shares outstanding (in shares)	15,651,243
Franklin Financial Network, Inc.
Business Combination, Consideration Transferred [Abstract]
Shares outstanding (in shares)	15,588,337
Options converted to net shares (in shares)	62,906
Number of shares outstanding including converted options (in shares)	15,651,243
Exchange ratio	0.965
Shares to be issued as merger consideration (in shares)	15,102,492
Issuance price (in dollars per share) \| $ / shares	$ 29.52
Value of stock to be issued as merger consideration \| $	$ 445,826
Less: tax withholding on vested restricted stock awards, units and options \| $	(1,308)
Value of stock issued \| $	$ 444,518
Net shares issued (in shares)	15,058,181
Stock units that do not vest on change in control (in shares)	114,915
Replacement awards issued to employees (in shares)	118,776
Fair value of replacement awards (in shares)	3,506,000
Fair value replacement awards attributable to pre-combination service \| $	$ 674
Cash consideration per share (in dollars per share) \| $ / shares	$ 2.00
Total cash to be paid \| $	$ 31,330
Total purchase price \| $	477,830
Preliminary fair value of net assets acquired \| $	410,639
Goodwill resulting from merger \| $	$ 67,191
Equivalent value of parent stock (in shares)	44,311
Cash paid in lieu of fractional shares \| $	$ 28

Mergers and acquisitions - FNB Financial Corp. - Narrative (Details) - FNB Financial Corp. $ / shares in Units, $ in Thousands	Feb. 14, 2020 USD ($) branch $ / shares shares
Business Acquisition [Line Items]
Assets assumed in acquisition	$ 258,218
Loans assumed in acquisition	182,171
Deposits assumed in acquisition	$ 209,535
Business acquisition, shares issued (in shares) \| shares	954,797
Cash consideration paid	$ 15,001
Business acquisition, share price (in dollars per share) \| $ / shares	$ 36.70
Purchase price	$ 50,042
Goodwill resulting from merger	$ 6,319
Kentucky
Business Acquisition [Line Items]
Number of branches acquired \| branch	4

Mergers and acquisitions - Consideration for FNB Financial Corp. (Details) - FNB Financial Corp. $ / shares in Units, $ in Thousands	Feb. 14, 2020 USD ($) $ / shares shares
Business Combination, Consideration Transferred [Abstract]
Net shares issued (in shares) \| shares	954,797
Purchase price per share (in dollars per share) \| $ / shares	$ 36.70
Value of stock consideration	$ 35,041
Cash consideration paid	15,001
Total purchase price	50,042
Preliminary fair value of net assets acquired	43,723
Goodwill resulting from merger	$ 6,319

Mergers and acquisitions - Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Aug. 15, 2020	Feb. 14, 2020
Franklin Financial Network, Inc.
ASSETS
Cash and cash equivalents	$ 284,004
Investments	373,462
Mortgage loans held for sale, at fair value	38,740
Commercial loans held for sale, at fair value	326,206
Loans held for investment, net of fair value adjustments	2,427,527
Allowance for credit losses on purchased credit deteriorated loans	(24,831)
Premises and equipment	45,471
Operating lease right-of-use assets	23,958
Mortgage servicing rights	5,111
Core deposit intangible	7,670
Other assets	124,571
Total assets	3,631,889
LIABILITIES
Deposits, non-interest bearing	505,374
Deposits, interest-bearing checking	1,783,379
Money market and savings	342,093
Customer time deposits	383,433
Brokered and internet time deposits	107,452
Total deposits	3,121,731
Borrowings	62,435
Operating lease liabilities	24,330
Accrued expenses and other liabilities	12,661
Total liabilities assumed	3,221,157
Noncontrolling interests acquired	93
Net assets acquired	$ 410,639
FNB Financial Corp.
ASSETS
Cash and cash equivalents		$ 10,774
Investments		50,594
Mortgage loans held for sale, at fair value		0
Commercial loans held for sale, at fair value		0
Loans held for investment, net of fair value adjustments		182,171
Allowance for credit losses on purchased credit deteriorated loans		(669)
Premises and equipment		8,049
Operating lease right-of-use assets		14
Mortgage servicing rights		0
Core deposit intangible		2,490
Other assets		4,795
Total assets		258,218
LIABILITIES
Deposits, non-interest bearing		63,531
Deposits, interest-bearing checking		26,451
Money market and savings		37,002
Customer time deposits		82,551
Brokered and internet time deposits		0
Total deposits		209,535
Borrowings		3,192
Operating lease liabilities		14
Accrued expenses and other liabilities		1,754
Total liabilities assumed		214,495
Noncontrolling interests acquired		0
Net assets acquired		$ 43,723

Mergers and acquisitions - Purchased Credit-deteriorated Loans (Details) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended
	Aug. 15, 2020	Feb. 14, 2020	Sep. 30, 2020	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deterioration credit quality since origination, percentage	27.90%	10.10%
Allowance for credit loss, purchased with credit deterioration			$ 24,831	$ 25,500
Franklin Financial Network, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance	$ 693,999
Allowance for credit losses at acquisition	(24,831)
Net premium attributable to other factors	8,810
Loans purchased credit-deteriorated fair value	677,978
Allowance for credit loss, purchased with credit deterioration	52,822
Increase in provision for credit losses from unfunded commitments acquired in business combination	$ 10,499
FNB Financial Corp.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance		$ 18,964
Allowance for credit losses at acquisition		(669)
Net premium attributable to other factors		63
Loans purchased credit-deteriorated fair value		18,358
Allowance for credit loss, purchased with credit deterioration		$ 2,885

Mergers and acquisitions - Pro Forma Information (unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
Business Combination and Asset Acquisition [Abstract]
Net interest income	$ 83,641	$ 252,849
Total revenues	178,384	488,493
Net (loss) income applicable to FB Financial Corporation	$ (12,428)	$ 19,526

Investment securities - Summary of Amortized Cost and Fair Value of Securities (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Debt Securities, Available-for-sale [Abstract]
Amortized cost	$ 1,558,184,000	$ 1,137,848,000
Gross unrealized gains	24,408,000	35,376,000
Gross unrealized losses	(10,034,000)	(824,000)
Allowance for credit losses for investments	0	0	$ 0
Fair Value	1,572,558,000	1,172,400,000
U.S. government agency securities
Debt Securities, Available-for-sale [Abstract]
Amortized cost	10,598,000	2,000,000
Gross unrealized gains	5,000	3,000
Gross unrealized losses	(32,000)	0
Allowance for credit losses for investments	0	0
Fair Value	10,571,000	2,003,000
Mortgage-backed securities - residential
Debt Securities, Available-for-sale [Abstract]
Amortized cost	1,211,042,000	760,099,000
Gross unrealized gains	9,111,000	14,040,000
Gross unrealized losses	(9,650,000)	(803,000)
Allowance for credit losses for investments	0	0
Fair Value	1,210,503,000	773,336,000
Mortgage-backed securities - commercial
Debt Securities, Available-for-sale [Abstract]
Amortized cost	15,374,000	20,226,000
Gross unrealized gains	368,000	1,362,000
Gross unrealized losses	(30,000)	0
Allowance for credit losses for investments	0	0
Fair Value	15,712,000	21,588,000
Municipal securities
Debt Securities, Available-for-sale [Abstract]
Amortized cost	312,672,000	336,543,000
Gross unrealized gains	14,881,000	19,806,000
Gross unrealized losses	(314,000)	(20,000)
Allowance for credit losses for investments	0	0
Fair Value	327,239,000	356,329,000
U.S. Treasury securities
Debt Securities, Available-for-sale [Abstract]
Amortized cost	5,998,000	16,480,000
Gross unrealized gains	8,000	148,000
Gross unrealized losses	0	0
Allowance for credit losses for investments	0	0
Fair Value	6,006,000	16,628,000
Corporate securities
Debt Securities, Available-for-sale [Abstract]
Amortized cost	2,500,000	2,500,000
Gross unrealized gains	35,000	17,000
Gross unrealized losses	(8,000)	(1,000)
Allowance for credit losses for investments	0	0
Fair Value	$ 2,527,000	$ 2,516,000

Investment securities - Narrative (Details)	3 Months Ended		9 Months Ended		12 Months Ended
Investment securities - Narrative (Details)	Sep. 30, 2021 USD ($) security	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) security	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) security
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	$ 41,393,000		$ 41,393,000		$ 43,603,000
Marketable securities at fair value	4,779,000		4,779,000		4,591,000
Trade date receivable - securities			0		0
Trade date payable - securities			5,996,000	$ 1,214,000	0
Net unrealized gains (losses) on change in fair value of equity securities	(24,000)	$ 59,000	188,000	94,000
Allowance for credit losses for investments	$ 0	0	$ 0	$ 0	$ 0
Number of securities in securities portfolio \| security	513		513		514
Number of securities in securities portfolio, unrealized loss position \| security	61		61		16
Provision for credit losses on available for sale debt securities	$ 0	$ 0
Collateral Pledged
Debt and Equity Securities, FV-NI [Line Items]
Securities pledged	1,154,797,000		$ 1,154,797,000		$ 804,821,000
Debt Securities
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	$ 4,744,000		$ 4,744,000		$ 4,540,000

Investment securities - Schedule of Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Amortized cost
Due in one year or less	$ 16,713	$ 35,486
Due in one to five years	20,242	24,278
Due in five to ten years	40,757	40,038
Due in over ten years	254,056	257,721
Amortized cost, sub-total	331,768	357,523
Total debt securities	1,558,184	1,137,848
Fair value
Due in one year or less	16,773	35,662
Due in one to five years	20,637	24,684
Due in five to ten years	42,211	41,332
Due in over ten years	266,722	275,798
Fair value, sub-total	346,343	377,476
Total debt securities	1,572,558	1,172,400
Mortgage-backed securities - residential
Amortized cost
Mortgage-backed securities	1,211,042	760,099
Total debt securities	1,211,042	760,099
Fair value
Mortgage-backed securities	1,210,503	773,336
Total debt securities	1,210,503	773,336
Mortgage-backed securities - commercial
Amortized cost
Mortgage-backed securities	15,374	20,226
Total debt securities	15,374	20,226
Fair value
Mortgage-backed securities	15,712	21,588
Total debt securities	$ 15,712	$ 21,588

Investment securities - Summary of Sales and Other Dispositions of Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 8,855	$ 28,257	$ 8,855	$ 28,257
Proceeds from maturities, prepayments and calls	68,126	67,886	216,032	140,246
Gross realized gains	76	563	91	563
Gross realized losses	$ 1	$ 39	$ 1	$ 39

Investment securities - Schedule of Gross Unrealized Losses on Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Abstract]
Fair Value, Less than 12 months	$ 752,226	$ 185,695
Unrealized Loss, Less than 12 months	(9,761)	(824)
Fair Value, 12 months or more	24,341	0
Unrealized Loss, 12 months or more	(273)	0
Fair Value, Total	776,567	185,695
Unrealized Loss, Total	(10,034)	(824)
U.S. government agency securities
Debt Securities, Available-for-sale [Abstract]
Fair Value, Less than 12 months	7,639
Unrealized Loss, Less than 12 months	(32)
Fair Value, 12 months or more	0
Unrealized Loss, 12 months or more	0
Fair Value, Total	7,639
Unrealized Loss, Total	(32)
Mortgage-backed securities - residential
Debt Securities, Available-for-sale [Abstract]
Fair Value, Less than 12 months	711,775	182,012
Unrealized Loss, Less than 12 months	(9,377)	(803)
Fair Value, 12 months or more	24,341	0
Unrealized Loss, 12 months or more	(273)	0
Fair Value, Total	736,116	182,012
Unrealized Loss, Total	(9,650)	(803)
Mortgage-backed securities - commercial
Debt Securities, Available-for-sale [Abstract]
Fair Value, Less than 12 months	1,949
Unrealized Loss, Less than 12 months	(30)
Fair Value, 12 months or more	0
Unrealized Loss, 12 months or more	0
Fair Value, Total	1,949
Unrealized Loss, Total	(30)
Municipal securities
Debt Securities, Available-for-sale [Abstract]
Fair Value, Less than 12 months	30,371	3,184
Unrealized Loss, Less than 12 months	(314)	(20)
Fair Value, 12 months or more	0	0
Unrealized Loss, 12 months or more	0	0
Fair Value, Total	30,371	3,184
Unrealized Loss, Total	(314)	(20)
Corporate securities
Debt Securities, Available-for-sale [Abstract]
Fair Value, Less than 12 months	492	499
Unrealized Loss, Less than 12 months	(8)	(1)
Fair Value, 12 months or more	0
Unrealized Loss, 12 months or more	0
Fair Value, Total	492	499
Unrealized Loss, Total	$ (8)	$ (1)

Loans and allowance for credit losses - Loans Outstanding by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Gross loans	$ 7,294,674		$ 7,082,959
Less: Allowance for credit losses	(139,446)	$ (144,663)	(170,389)	$ (183,973)	$ (113,129)	$ (31,139)
Net loans	7,155,228		6,912,570
Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans originated as part of PPP program	9,415		212,645
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Gross loans	1,252,425		1,346,122
Less: Allowance for credit losses	(14,838)	(13,791)	(14,748)	(8,609)	(8,878)	(4,805)
Construction
Financing Receivable, Past Due [Line Items]
Gross loans	1,190,623		1,222,220
Less: Allowance for credit losses	(29,760)	(32,838)	(58,477)	(63,629)	(35,599)	(10,194)
Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	1,175,155		1,089,270
Less: Allowance for credit losses	(17,028)	(19,672)	(19,220)	(18,298)	(12,463)	(3,112)
Residential real estate \| Residential line of credit
Financing Receivable, Past Due [Line Items]
Gross loans	392,440		408,211
Less: Allowance for credit losses	(5,765)	(6,716)	(10,534)	(11,455)	(6,811)	(752)
Residential real estate \| Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Gross loans	324,662		175,676
Less: Allowance for credit losses	(12,013)	(13,475)	(7,174)	(7,191)	(4,499)	(544)
Commercial real estate \| Owner occupied
Financing Receivable, Past Due [Line Items]
Gross loans	938,241		924,841
Less: Allowance for credit losses	(12,376)	(4,707)	(4,849)	(6,705)	(7,420)	(4,109)
Commercial real estate \| Non-owner occupied
Financing Receivable, Past Due [Line Items]
Gross loans	1,695,573		1,598,979
Less: Allowance for credit losses	(36,406)	(42,856)	(44,147)	(57,640)	(30,444)	(4,621)
Consumer and other
Financing Receivable, Past Due [Line Items]
Gross loans	325,555		317,640
Less: Allowance for credit losses	$ (11,260)	$ (10,608)	$ (11,240)	$ (10,446)	$ (7,015)	$ (3,002)

Loans and allowance for credit losses - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Accrued interest receivable on loans	$ 34,915,000		$ 34,915,000		$ 38,316,000
Accrued interest receivable written off as an adjustment to interest income on non-accrual loans	63,000	$ 660,000	177,000	$ 459,000
Recorded investment in TDRs	29,645,000		29,645,000		15,988,000
TDRs classified as non-accruals	10,628,000		10,628,000		8,279,000
Allocation to specific reserves	1,007,000		1,007,000		310,000
Commitment to lend additional amounts to troubled debt restructuring	422,000		422,000		0
Payment default for loans modified as troubled debt restructurings	305,000	$ 0	$ 305,000	$ 0
Payment deferral extension period			60 days
Deferred loans that were transferred to normal payment status	1,331,538,000		$ 1,331,538,000		1,399,088,000
Minimum
Financing Receivable, Past Due [Line Items]
Payment deferral period			60 days
Maximum
Financing Receivable, Past Due [Line Items]
Payment deferral period			90 days
Federal Reserve Bank
Financing Receivable, Past Due [Line Items]
Pledged loans to the Federal Reserve Bank	2,345,431,000		$ 2,345,431,000		2,463,281,000
FHLB Cincinnati \| Residential Mortgage Loans
Financing Receivable, Past Due [Line Items]
Pledge loans to the Federal Home Loan Bank securing advances	1,220,451,000		1,220,451,000		1,248,857,000
FHLB Cincinnati \| Commercial Loan
Financing Receivable, Past Due [Line Items]
Pledge loans to the Federal Home Loan Bank securing advances	$ 1,571,007,000		$ 1,571,007,000		$ 1,532,749,000

Loans and allowance for credit losses - Changes in Allowance for Credit Losses by Class of Financing Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 144,663	$ 113,129	$ 170,389	$ 31,139
Provision for credit losses	(2,832)	45,834	(27,349)	97,837
Recoveries of loans previously charged-off	229	1,172	1,049	2,620
Loans charged off	(2,614)	(993)	(4,643)	(4,569)
Initial allowance on loans purchased with deteriorated credit quality		24,831		25,500
Balance at end of period	139,446	183,973	139,446	183,973
Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			18,945
Balance at end of period	14,228		14,228
Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				30,888
Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				558
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	13,791	8,878	14,748	4,805
Provision for credit losses	3,203	(1,520)	2,667	(2,354)
Recoveries of loans previously charged-off	19	757	235	1,652
Loans charged off	(2,175)	(249)	(2,812)	(1,630)
Initial allowance on loans purchased with deteriorated credit quality		743		754
Balance at end of period	14,838	8,609	14,838	8,609
Commercial and industrial \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			882
Balance at end of period	567		567
Commercial and industrial \| Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				5,300
Commercial and industrial \| Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				82
Construction
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	32,838	35,599	58,477	10,194
Provision for credit losses	(3,080)	22,383	(28,690)	45,962
Recoveries of loans previously charged-off	3	51	3	202
Loans charged off	(1)	0	(30)	(18)
Initial allowance on loans purchased with deteriorated credit quality		5,596		5,606
Balance at end of period	29,760	63,629	29,760	63,629
Construction \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			4,317
Balance at end of period	1,404		1,404
Construction \| Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				1,533
Construction \| Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				150
Residential real estate \| 1-to-4 family mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	19,672	12,463	19,220	3,112
Provision for credit losses	(2,677)	4,194	(2,141)	5,412
Recoveries of loans previously charged-off	33	116	98	166
Loans charged off	0	(8)	(149)	(373)
Initial allowance on loans purchased with deteriorated credit quality		1,533		1,640
Balance at end of period	17,028	18,298	17,028	18,298
Residential real estate \| 1-to-4 family mortgage \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			2,014
Balance at end of period	972		972
Residential real estate \| 1-to-4 family mortgage \| Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				7,920
Residential real estate \| 1-to-4 family mortgage \| Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				421
Residential real estate \| Residential line of credit
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	6,716	6,811	10,534	752
Provision for credit losses	(952)	4,053	(4,767)	6,633
Recoveries of loans previously charged-off	1	22	16	61
Loans charged off	0	0	(18)	(21)
Initial allowance on loans purchased with deteriorated credit quality		569		572
Balance at end of period	5,765	11,455	5,765	11,455
Residential real estate \| Residential line of credit \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			494
Balance at end of period	161		161
Residential real estate \| Residential line of credit \| Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				3,461
Residential real estate \| Residential line of credit \| Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				(3)
Residential real estate \| Multi-family mortgage
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	13,475	4,499	7,174	544
Provision for credit losses	(1,462)	1,908	4,839	5,523
Recoveries of loans previously charged-off	0	0	0	0
Loans charged off	0	0	0	0
Initial allowance on loans purchased with deteriorated credit quality		784		784
Balance at end of period	12,013	7,191	12,013	7,191
Residential real estate \| Multi-family mortgage \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			848
Balance at end of period	452		452
Residential real estate \| Multi-family mortgage \| Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				340
Residential real estate \| Multi-family mortgage \| Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				0
Commercial real estate \| Owner occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	4,707	7,420	4,849	4,109
Provision for credit losses	7,665	(1,276)	7,384	132
Recoveries of loans previously charged-off	4	51	143	68
Loans charged off	0	(95)	0	(304)
Initial allowance on loans purchased with deteriorated credit quality		605		659
Balance at end of period	12,376	6,705	12,376	6,705
Commercial real estate \| Owner occupied \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			757
Balance at end of period	965		965
Commercial real estate \| Owner occupied \| Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				1,879
Commercial real estate \| Owner occupied \| Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				162
Commercial real estate \| Non-owner occupied
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	42,856	30,444	44,147	4,621
Provision for credit losses	(6,450)	12,364	(7,741)	31,282
Recoveries of loans previously charged-off	0	0	0	0
Loans charged off	0	(166)	0	(711)
Initial allowance on loans purchased with deteriorated credit quality		14,998		15,442
Balance at end of period	36,406	57,640	36,406	57,640
Commercial real estate \| Non-owner occupied \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			8,910
Balance at end of period	9,106		9,106
Commercial real estate \| Non-owner occupied \| Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				6,822
Commercial real estate \| Non-owner occupied \| Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				184
Consumer and other
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	10,608	7,015	11,240	3,002
Provision for credit losses	921	3,728	1,100	5,247
Recoveries of loans previously charged-off	169	175	554	471
Loans charged off	(438)	(475)	(1,634)	(1,512)
Initial allowance on loans purchased with deteriorated credit quality		3		43
Balance at end of period	11,260	$ 10,446	11,260	10,446
Consumer and other \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period			723
Balance at end of period	$ 601		$ 601
Consumer and other \| Impact of adopting ASC 326 \| Non-purchased credit deteriorated loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				3,633
Consumer and other \| Impact of adopting ASC 326 \| Purchased Credit Impaired loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period				$ (438)

Loans and allowance for credit losses - Allowance for Credit Losses by Class of Financing Receivable Disaggregated by Measurement Methodology (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	$ 1,035		$ 2,039
Collectively evaluated for credit loss	124,183		149,405
Total	139,446	$ 144,663	170,389	$ 183,973	$ 113,129	$ 31,139
Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	14,228		18,945
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	123		373
Collectively evaluated for credit loss	14,148		13,493
Total	14,838	13,791	14,748	8,609	8,878	4,805
Commercial and industrial \| Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	567		882
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	112		95
Collectively evaluated for credit loss	28,244		54,065
Total	29,760	32,838	58,477	63,629	35,599	10,194
Construction \| Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,404		4,317
Residential real estate \| 1-to-4 family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	0		0
Collectively evaluated for credit loss	16,056		17,206
Total	17,028	19,672	19,220	18,298	12,463	3,112
Residential real estate \| 1-to-4 family mortgage \| Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	972		2,014
Residential real estate \| Residential line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	7		9
Collectively evaluated for credit loss	5,597		10,031
Total	5,765	6,716	10,534	11,455	6,811	752
Residential real estate \| Residential line of credit \| Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	161		494
Residential real estate \| Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	0		0
Collectively evaluated for credit loss	11,561		6,326
Total	12,013	13,475	7,174	7,191	4,499	544
Residential real estate \| Multi-family mortgage \| Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	452		848
Commercial real estate \| Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	167		30
Collectively evaluated for credit loss	11,244		4,062
Total	12,376	4,707	4,849	6,705	7,420	4,109
Commercial real estate \| Owner occupied \| Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	965		757
Commercial real estate \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	624		1,531
Collectively evaluated for credit loss	26,676		33,706
Total	36,406	42,856	44,147	57,640	30,444	4,621
Commercial real estate \| Non-owner occupied \| Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	9,106		8,910
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	2		1
Collectively evaluated for credit loss	10,657		10,516
Total	11,260	$ 10,608	11,240	$ 10,446	$ 7,015	$ 3,002
Consumer and other \| Purchased Credit Impaired loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 601		$ 723

Loans and allowance for credit losses - Amount of Loans by Loan Class of Financing Receivable Individually and Collectively Evaluated for Credit Loss (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	$ 28,161	$ 38,205
Collectively evaluated for credit loss	6,754,302	6,329,868
Purchased credit deteriorated	512,211	714,886
Total	7,294,674	7,082,959
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	2,802	15,578
Collectively evaluated for credit loss	1,206,783	1,270,058
Purchased credit deteriorated	42,840	60,486
Total	1,252,425	1,346,122
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	4,597	4,851
Collectively evaluated for credit loss	1,148,604	1,140,634
Purchased credit deteriorated	37,422	76,735
Total	1,190,623	1,222,220
Residential real estate \| 1-to-4 family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	375	848
Collectively evaluated for credit loss	1,112,578	987,142
Purchased credit deteriorated	62,202	101,280
Total	1,175,155	1,089,270
Residential real estate \| Residential line of credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	1,123	412
Collectively evaluated for credit loss	380,272	387,250
Purchased credit deteriorated	11,045	20,549
Total	392,440	408,211
Residential real estate \| Multi-family mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	0	0
Collectively evaluated for credit loss	315,140	156,447
Purchased credit deteriorated	9,522	19,229
Total	324,662	175,676
Commercial real estate \| Owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	7,808	7,846
Collectively evaluated for credit loss	857,865	813,151
Purchased credit deteriorated	72,568	103,844
Total	938,241	924,841
Commercial real estate \| Non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	11,430	8,631
Collectively evaluated for credit loss	1,419,981	1,272,203
Purchased credit deteriorated	264,162	318,145
Total	1,695,573	1,598,979
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for credit loss	26	39
Collectively evaluated for credit loss	313,079	302,983
Purchased credit deteriorated	12,450	14,618
Total	$ 325,555	$ 317,640

Loans and allowance for credit losses - Credit Quality of Loan Portfolio by Year of Origination (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	$ 1,652,254	$ 1,517,481
Before Current Fiscal Year	1,062,475	1,246,239
Two Years before Current Fiscal Year	913,233	853,371
Three Years before Current Fiscal Year	675,880	696,494
Four Years before Current Fiscal Year	527,364	648,821
Five Years before Current Fiscal Year	1,225,434	900,082
Revolving Loans Amortized Cost Basis	1,238,034	1,220,471
Total	7,294,674	7,082,959
Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	1,650,073	1,510,393
Before Current Fiscal Year	1,055,269	1,228,017
Two Years before Current Fiscal Year	893,928	813,323
Three Years before Current Fiscal Year	632,966	660,160
Four Years before Current Fiscal Year	511,224	628,209
Five Years before Current Fiscal Year	1,162,765	836,930
Revolving Loans Amortized Cost Basis	1,209,797	1,171,352
Total	7,116,022	6,848,384
Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	344	3,371
Before Current Fiscal Year	1,592	7,791
Two Years before Current Fiscal Year	6,089	16,478
Three Years before Current Fiscal Year	7,455	19,060
Four Years before Current Fiscal Year	1,426	9,199
Five Years before Current Fiscal Year	16,512	18,733
Revolving Loans Amortized Cost Basis	13,614	27,720
Total	47,032	102,352
Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	1,837	3,717
Before Current Fiscal Year	5,614	10,431
Two Years before Current Fiscal Year	13,216	23,570
Three Years before Current Fiscal Year	35,459	17,274
Four Years before Current Fiscal Year	14,714	11,413
Five Years before Current Fiscal Year	46,157	44,419
Revolving Loans Amortized Cost Basis	14,623	21,399
Total	131,620	132,223
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	195,246	341,806
Before Current Fiscal Year	108,148	189,148
Two Years before Current Fiscal Year	154,664	82,337
Three Years before Current Fiscal Year	64,005	64,787
Four Years before Current Fiscal Year	47,957	45,070
Five Years before Current Fiscal Year	70,264	46,542
Revolving Loans Amortized Cost Basis	612,141	576,432
Total	1,252,425	1,346,122
Commercial and industrial \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	194,285	339,074
Before Current Fiscal Year	105,301	185,636
Two Years before Current Fiscal Year	151,572	70,549
Three Years before Current Fiscal Year	60,459	59,917
Four Years before Current Fiscal Year	44,334	37,573
Five Years before Current Fiscal Year	61,502	42,685
Revolving Loans Amortized Cost Basis	591,465	540,960
Total	1,208,918	1,276,394
Commercial and industrial \| Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	68	231
Before Current Fiscal Year	246	824
Two Years before Current Fiscal Year	414	561
Three Years before Current Fiscal Year	19	445
Four Years before Current Fiscal Year	5	915
Five Years before Current Fiscal Year	2,051	2,580
Revolving Loans Amortized Cost Basis	12,987	24,826
Total	15,790	30,382
Commercial and industrial \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	893	2,501
Before Current Fiscal Year	2,601	2,688
Two Years before Current Fiscal Year	2,678	11,227
Three Years before Current Fiscal Year	3,527	4,425
Four Years before Current Fiscal Year	3,618	6,582
Five Years before Current Fiscal Year	6,711	1,277
Revolving Loans Amortized Cost Basis	7,689	10,646
Total	27,717	39,346
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	455,443	462,757
Before Current Fiscal Year	337,263	393,683
Two Years before Current Fiscal Year	148,980	91,865
Three Years before Current Fiscal Year	49,905	54,304
Four Years before Current Fiscal Year	20,720	41,636
Five Years before Current Fiscal Year	71,836	65,971
Revolving Loans Amortized Cost Basis	106,476	112,004
Total	1,190,623	1,222,220
Construction \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	455,443	461,715
Before Current Fiscal Year	337,263	390,443
Two Years before Current Fiscal Year	145,945	86,490
Three Years before Current Fiscal Year	47,026	52,942
Four Years before Current Fiscal Year	19,507	40,907
Five Years before Current Fiscal Year	67,697	62,890
Revolving Loans Amortized Cost Basis	106,294	112,004
Total	1,179,175	1,207,391
Construction \| Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	469
Before Current Fiscal Year	0	1,485
Two Years before Current Fiscal Year	0	2,197
Three Years before Current Fiscal Year	0	1,221
Four Years before Current Fiscal Year	1,209	729
Five Years before Current Fiscal Year	1,441	13
Revolving Loans Amortized Cost Basis	0	0
Total	2,650	6,114
Construction \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	573
Before Current Fiscal Year	0	1,755
Two Years before Current Fiscal Year	3,035	3,178
Three Years before Current Fiscal Year	2,879	141
Four Years before Current Fiscal Year	4	0
Five Years before Current Fiscal Year	2,698	3,068
Revolving Loans Amortized Cost Basis	182	0
Total	8,798	8,715
Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	361,740	284,978
Before Current Fiscal Year	221,538	179,968
Two Years before Current Fiscal Year	130,773	169,514
Three Years before Current Fiscal Year	118,658	163,957
Four Years before Current Fiscal Year	121,555	115,537
Five Years before Current Fiscal Year	220,891	175,316
Revolving Loans Amortized Cost Basis	0	0
Total	1,175,155	1,089,270
Residential real estate \| 1-to-4 family mortgage \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	360,638	283,107
Before Current Fiscal Year	217,308	176,711
Two Years before Current Fiscal Year	128,286	164,499
Three Years before Current Fiscal Year	115,183	157,731
Four Years before Current Fiscal Year	116,907	111,194
Five Years before Current Fiscal Year	211,215	162,051
Revolving Loans Amortized Cost Basis	0	0
Total	1,149,537	1,055,293
Residential real estate \| 1-to-4 family mortgage \| Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	201	1,423
Before Current Fiscal Year	1,346	1,829
Two Years before Current Fiscal Year	525	1,209
Three Years before Current Fiscal Year	389	753
Four Years before Current Fiscal Year	99	721
Five Years before Current Fiscal Year	1,648	3,865
Revolving Loans Amortized Cost Basis	0	0
Total	4,208	9,800
Residential real estate \| 1-to-4 family mortgage \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	901	448
Before Current Fiscal Year	2,884	1,428
Two Years before Current Fiscal Year	1,962	3,806
Three Years before Current Fiscal Year	3,086	5,473
Four Years before Current Fiscal Year	4,549	3,622
Five Years before Current Fiscal Year	8,028	9,400
Revolving Loans Amortized Cost Basis	0	0
Total	21,410	24,177
Residential real estate \| Residential line of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	0
Before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	392,440	408,211
Total	392,440	408,211
Residential real estate \| Residential line of credit \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	0
Before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	387,472	400,206
Total	387,472	400,206
Residential real estate \| Residential line of credit \| Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	0
Before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	407	2,653
Total	407	2,653
Residential real estate \| Residential line of credit \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	0
Before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	4,561	5,352
Total	4,561	5,352
Residential real estate \| Multi-family mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	144,982	29,006
Before Current Fiscal Year	32,463	13,446
Two Years before Current Fiscal Year	68,421	11,843
Three Years before Current Fiscal Year	7,050	46,561
Four Years before Current Fiscal Year	20,528	28,330
Five Years before Current Fiscal Year	40,810	35,396
Revolving Loans Amortized Cost Basis	10,408	11,094
Total	324,662	175,676
Residential real estate \| Multi-family mortgage \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	144,982	29,006
Before Current Fiscal Year	32,463	13,446
Two Years before Current Fiscal Year	68,421	11,843
Three Years before Current Fiscal Year	7,050	46,561
Four Years before Current Fiscal Year	20,528	28,330
Five Years before Current Fiscal Year	39,546	35,339
Revolving Loans Amortized Cost Basis	10,408	11,094
Total	323,398	175,619
Residential real estate \| Multi-family mortgage \| Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	0
Before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Five Years before Current Fiscal Year	0	0
Revolving Loans Amortized Cost Basis	0	0
Total	0	0
Residential real estate \| Multi-family mortgage \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	0
Before Current Fiscal Year	0	0
Two Years before Current Fiscal Year	0	0
Three Years before Current Fiscal Year	0	0
Four Years before Current Fiscal Year	0	0
Five Years before Current Fiscal Year	1,264	57
Revolving Loans Amortized Cost Basis	0	0
Total	1,264	57
Commercial real estate \| Owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	117,740	141,915
Before Current Fiscal Year	140,281	182,641
Two Years before Current Fiscal Year	182,406	104,251
Three Years before Current Fiscal Year	90,862	116,906
Four Years before Current Fiscal Year	87,586	82,914
Five Years before Current Fiscal Year	264,659	237,800
Revolving Loans Amortized Cost Basis	54,707	58,414
Total	938,241	924,841
Commercial real estate \| Owner occupied \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	117,740	140,904
Before Current Fiscal Year	140,281	179,500
Two Years before Current Fiscal Year	177,960	97,577
Three Years before Current Fiscal Year	86,488	94,659
Four Years before Current Fiscal Year	83,352	76,539
Five Years before Current Fiscal Year	247,941	224,108
Revolving Loans Amortized Cost Basis	52,732	53,451
Total	906,494	866,738
Commercial real estate \| Owner occupied \| Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	967
Before Current Fiscal Year	0	1,356
Two Years before Current Fiscal Year	1,328	4,251
Three Years before Current Fiscal Year	3,595	16,173
Four Years before Current Fiscal Year	112	6,101
Five Years before Current Fiscal Year	2,948	2,466
Revolving Loans Amortized Cost Basis	220	230
Total	8,203	31,544
Commercial real estate \| Owner occupied \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	44
Before Current Fiscal Year	0	1,785
Two Years before Current Fiscal Year	3,118	2,423
Three Years before Current Fiscal Year	779	6,074
Four Years before Current Fiscal Year	4,122	274
Five Years before Current Fiscal Year	13,770	11,226
Revolving Loans Amortized Cost Basis	1,755	4,733
Total	23,544	26,559
Commercial real estate \| Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	304,279	166,962
Before Current Fiscal Year	163,471	233,152
Two Years before Current Fiscal Year	186,787	350,814
Three Years before Current Fiscal Year	309,846	221,149
Four Years before Current Fiscal Year	205,337	290,370
Five Years before Current Fiscal Year	479,254	297,712
Revolving Loans Amortized Cost Basis	46,599	38,820
Total	1,695,573	1,598,979
Commercial real estate \| Non-owner occupied \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	304,279	166,962
Before Current Fiscal Year	163,471	229,442
Two Years before Current Fiscal Year	180,893	342,640
Three Years before Current Fiscal Year	282,221	221,149
Four Years before Current Fiscal Year	203,813	290,163
Five Years before Current Fiscal Year	460,088	272,184
Revolving Loans Amortized Cost Basis	46,599	38,820
Total	1,641,364	1,561,360
Commercial real estate \| Non-owner occupied \| Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	0
Before Current Fiscal Year	0	1,500
Two Years before Current Fiscal Year	3,812	6,672
Three Years before Current Fiscal Year	3,452	0
Four Years before Current Fiscal Year	0	207
Five Years before Current Fiscal Year	8,041	8,445
Revolving Loans Amortized Cost Basis	0	0
Total	15,305	16,824
Commercial real estate \| Non-owner occupied \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	0	0
Before Current Fiscal Year	0	2,210
Two Years before Current Fiscal Year	2,082	1,502
Three Years before Current Fiscal Year	24,173	0
Four Years before Current Fiscal Year	1,524	0
Five Years before Current Fiscal Year	11,125	17,083
Revolving Loans Amortized Cost Basis	0	0
Total	38,904	20,795
Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	72,824	90,057
Before Current Fiscal Year	59,311	54,201
Two Years before Current Fiscal Year	41,202	42,747
Three Years before Current Fiscal Year	35,554	28,830
Four Years before Current Fiscal Year	23,681	44,964
Five Years before Current Fiscal Year	77,720	41,345
Revolving Loans Amortized Cost Basis	15,263	15,496
Total	325,555	317,640
Consumer and other \| Pass
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	72,706	89,625
Before Current Fiscal Year	59,182	52,839
Two Years before Current Fiscal Year	40,851	39,725
Three Years before Current Fiscal Year	34,539	27,201
Four Years before Current Fiscal Year	22,783	43,503
Five Years before Current Fiscal Year	74,776	37,673
Revolving Loans Amortized Cost Basis	14,827	14,817
Total	319,664	305,383
Consumer and other \| Special Mention
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	75	281
Before Current Fiscal Year	0	797
Two Years before Current Fiscal Year	10	1,588
Three Years before Current Fiscal Year	0	468
Four Years before Current Fiscal Year	1	526
Five Years before Current Fiscal Year	383	1,364
Revolving Loans Amortized Cost Basis	0	11
Total	469	5,035
Consumer and other \| Classified
Financing Receivable, Allowance for Credit Loss [Line Items]
Current Fiscal Year	43	151
Before Current Fiscal Year	129	565
Two Years before Current Fiscal Year	341	1,434
Three Years before Current Fiscal Year	1,015	1,161
Four Years before Current Fiscal Year	897	935
Five Years before Current Fiscal Year	2,561	2,308
Revolving Loans Amortized Cost Basis	436	668
Total	$ 5,422	$ 7,222

Loans and allowance for credit losses - Analysis of Aging by Class of Financing Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans	$ 7,294,674	$ 7,082,959
90 days or more and accruing interest	8,901	13,696
Non-accrual loans	34,126	50,760
30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	15,402	26,995
Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	7,236,245	6,991,508
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Loans	1,252,425	1,346,122
90 days or more and accruing interest	126	330
Non-accrual loans	2,896	16,005
Commercial and industrial \| 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	1,400	3,297
Commercial and industrial \| Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	1,248,003	1,326,490
Construction
Financing Receivable, Past Due [Line Items]
Loans	1,190,623	1,222,220
90 days or more and accruing interest	1,057	573
Non-accrual loans	3,851	4,053
Construction \| 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	2,078	7,607
Construction \| Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	1,183,637	1,209,987
Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Loans	1,175,155	1,089,270
90 days or more and accruing interest	6,989	10,470
Non-accrual loans	4,936	5,923
Residential real estate \| 1-to-4 family mortgage \| 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	5,233	7,058
Residential real estate \| 1-to-4 family mortgage \| Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	1,157,997	1,065,819
Residential real estate \| Residential line of credit
Financing Receivable, Past Due [Line Items]
Loans	392,440	408,211
90 days or more and accruing interest	0	239
Non-accrual loans	1,269	1,757
Residential real estate \| Residential line of credit \| 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	1,132	3,551
Residential real estate \| Residential line of credit \| Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	390,039	402,664
Residential real estate \| Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Loans	324,662	175,676
90 days or more and accruing interest	0	57
Non-accrual loans	50	0
Residential real estate \| Multi-family mortgage \| 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate \| Multi-family mortgage \| Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	324,612	175,619
Commercial real estate \| Owner occupied
Financing Receivable, Past Due [Line Items]
Loans	938,241	924,841
90 days or more and accruing interest	0	0
Non-accrual loans	6,239	7,948
Commercial real estate \| Owner occupied \| 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	565	98
Commercial real estate \| Owner occupied \| Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	931,437	916,795
Commercial real estate \| Non-owner occupied
Financing Receivable, Past Due [Line Items]
Loans	1,695,573	1,598,979
90 days or more and accruing interest	0	0
Non-accrual loans	11,666	12,471
Commercial real estate \| Non-owner occupied \| 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	452	915
Commercial real estate \| Non-owner occupied \| Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	1,683,455	1,585,593
Consumer and other
Financing Receivable, Past Due [Line Items]
Loans	325,555	317,640
90 days or more and accruing interest	729	2,027
Non-accrual loans	3,219	2,603
Consumer and other \| 30-89 days past due
Financing Receivable, Past Due [Line Items]
Loans	4,542	4,469
Consumer and other \| Loans current on payments and accruing interest
Financing Receivable, Past Due [Line Items]
Loans	$ 317,065	$ 308,541

Loans and allowance for credit losses - Amortized Cost and Related Allowance of Non-accrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	$ 17,919	$ 32,661
Non-accrual with related allowance	16,207	18,099
Related allowance	1,314	2,550
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	1,777	13,960
Non-accrual with related allowance	1,119	2,045
Related allowance	135	383
Construction
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	2,879	3,061
Non-accrual with related allowance	972	992
Related allowance	121	131
Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	772	3,048
Non-accrual with related allowance	4,164	2,875
Related allowance	66	84
Residential real estate \| Residential line of credit
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	804	854
Non-accrual with related allowance	465	903
Related allowance	9	31
Residential real estate \| Multi-family mortgage
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	0	0
Non-accrual with related allowance	50	0
Related allowance	8	0
Commercial real estate \| Owner occupied
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	5,408	7,172
Non-accrual with related allowance	831	776
Related allowance	171	63
Commercial real estate \| Non-owner occupied
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	6,279	4,566
Non-accrual with related allowance	5,387	7,905
Related allowance	641	1,711
Consumer and other
Financing Receivable, Past Due [Line Items]
Non-accrual with no related allowance	0	0
Non-accrual with related allowance	3,219	2,603
Related allowance	$ 163	$ 147

Loans and allowance for credit losses - Interest Income Recognized on Non-accrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	$ 961	$ 524	$ 1,973	$ 729
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	190	287	523	304
Construction
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	75	42	105	48
Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	114	15	199	21
Residential real estate \| Residential line of credit
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	197	72	242	72
Residential real estate \| Multi-family mortgage
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	0	0	2	0
Commercial real estate \| Owner occupied
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	187	32	419	75
Commercial real estate \| Non-owner occupied
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	123	76	353	185
Consumer and other
Financing Receivable, Impaired [Line Items]
Interest income recognized on non-accrual loans	$ 75	$ 0	$ 130	$ 24

Loans and allowance for credit losses - Financial Effect of TDRs (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| loan	1	2	14	8
Pre-modification outstanding recorded investment	$ 134	$ 420	$ 29,665	$ 6,190
Post-modification outstanding recorded investment	134	420	29,665	6,190
Charge offs and specific reserves	$ 0	$ 0	$ 0	$ 0
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| loan		2	5	3
Pre-modification outstanding recorded investment		$ 420	$ 13,162	$ 1,573
Post-modification outstanding recorded investment		420	13,162	1,573
Charge offs and specific reserves		$ 0	$ 0	$ 0
Commercial real estate \| Owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| loan			4	1
Pre-modification outstanding recorded investment			$ 3,550	$ 788
Post-modification outstanding recorded investment			3,550	788
Charge offs and specific reserves			$ 0
Commercial real estate \| Non-owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| loan			1	2
Pre-modification outstanding recorded investment			$ 11,997	$ 3,752
Post-modification outstanding recorded investment			11,997	3,752
Charge offs and specific reserves			$ 0	$ 0
Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| loan	1		3	2
Pre-modification outstanding recorded investment	$ 134		$ 945	$ 77
Post-modification outstanding recorded investment	134		945	77
Charge offs and specific reserves	$ 0		$ 0	$ 0
Residential real estate \| Residential line of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans \| loan			1
Pre-modification outstanding recorded investment			$ 11
Post-modification outstanding recorded investment			11
Charge offs and specific reserves			$ 0

Loans and allowance for credit losses - Individually Assessed Allowance for Credit Losses for Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	$ 139,446	$ 144,663	$ 170,389	$ 183,973	$ 113,129	$ 31,139
Individually assessed allowance for credit loss	1,035		2,039
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	14,838	13,791	14,748	8,609	8,878	4,805
Individually assessed allowance for credit loss	123		373
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	29,760	32,838	58,477	63,629	35,599	10,194
Individually assessed allowance for credit loss	112		95
Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	17,028	19,672	19,220	18,298	12,463	3,112
Individually assessed allowance for credit loss	0		0
Residential real estate \| Residential line of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	5,765	6,716	10,534	11,455	6,811	752
Individually assessed allowance for credit loss	7		9
Commercial real estate \| Owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	12,376	4,707	4,849	6,705	7,420	4,109
Individually assessed allowance for credit loss	167		30
Commercial real estate \| Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	36,406	42,856	44,147	57,640	30,444	4,621
Individually assessed allowance for credit loss	624		1,531
Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	11,260	$ 10,608	11,240	$ 10,446	$ 7,015	$ 3,002
Individually assessed allowance for credit loss	2		1
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	25,994		16,832
Real Estate \| Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	635		0
Real Estate \| Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	4,597		3,877
Real Estate \| Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	375		226
Real Estate \| Residential real estate \| Residential line of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	1,123		1,174
Real Estate \| Commercial real estate \| Owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	7,808		3,391
Real Estate \| Commercial real estate \| Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	11,430		8,164
Real Estate \| Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	26
Financial Assets and Equipment
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	2,166		1,728
Financial Assets and Equipment \| Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	2,166		1,728
Financial Assets and Equipment \| Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	0		0
Financial Assets and Equipment \| Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	0		0
Financial Assets and Equipment \| Residential real estate \| Residential line of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	0		0
Financial Assets and Equipment \| Commercial real estate \| Owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	0		0
Financial Assets and Equipment \| Commercial real estate \| Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	0		0
Financial Assets and Equipment \| Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Type of Collateral	0
Individually assessed allowance for credit loss
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually assessed allowance for credit loss	1,035		1,687
Individually assessed allowance for credit loss \| Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually assessed allowance for credit loss	123		117
Individually assessed allowance for credit loss \| Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually assessed allowance for credit loss	112		0
Individually assessed allowance for credit loss \| Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually assessed allowance for credit loss	0		0
Individually assessed allowance for credit loss \| Residential real estate \| Residential line of credit
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually assessed allowance for credit loss	7		9
Individually assessed allowance for credit loss \| Commercial real estate \| Owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually assessed allowance for credit loss	167		30
Individually assessed allowance for credit loss \| Commercial real estate \| Non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually assessed allowance for credit loss	624		$ 1,531
Individually assessed allowance for credit loss \| Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually assessed allowance for credit loss	$ 2

Loans and allowance for credit losses - Deferrals Program (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 17,953	$ 202,517
% of Loans	0.20%	2.90%
Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 0	$ 7,118
% of Loans	0.00%	0.50%
Construction
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 0	$ 1,918
% of Loans	0.00%	0.20%
Residential real estate \| 1-to-4 family mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 0	$ 19,201
% of Loans	0.00%	1.80%
Residential real estate \| Residential line of credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 0	$ 204
% of Loans	0.00%	0.00%
Residential real estate \| Multi-family mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 0	$ 3,305
% of Loans	0.00%	1.90%
Commercial real estate \| Owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 0	$ 19,815
% of Loans	0.00%	2.10%
Commercial real estate \| Non-owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 17,953	$ 139,590
% of Loans	1.10%	8.70%
Consumer and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Outstanding loans balance	$ 0	$ 11,366
% of Loans	0.00%	3.60%

Other real estate owned - Summary of Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Real Estate [Roll Forward]
Balance at beginning of period	$ 11,986	$ 15,091	$ 12,111	$ 18,939
Transfers from loans	349	573	4,945	1,579
Transfers to premises and equipment	0	0	0	(841)
Proceeds from sale of other real estate owned	(4,173)	(1,411)	(8,834)	(5,561)
Gain on sale of other real estate owned	2,090	119	3,190	464
Loans provided for sales of other real estate owned	(152)	0	(685)	0
Write-downs and partial liquidations	(85)	(1,624)	(712)	(1,832)
Balance at end of period	$ 10,015	$ 12,748	$ 10,015	$ 12,748

Other real estate owned - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Real Estate Properties [Line Items]
Other real estate owned included excess land and facilities held for sale	$ 3,501	$ 5,703
Residential Real Estate Properties
Real Estate Properties [Line Items]
Foreclosed residential real estate properties	676	1,890
Total foreclosure proceedings in process	$ 129	$ 167

Leases - Narrative (Details)	3 Months Ended		9 Months Ended
Leases - Narrative (Details)	Sep. 30, 2021 USD ($) lease branch lease_renewal_option	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) lease branch lease_renewal_option	Sep. 30, 2020 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Lessee, number of operating leases \| lease	55		55
Lessee, number of finance leases \| branch	1		1
Lessee, number of total operating leases, noncurrent \| lease	44		44
Lessee, number of total finance leases, noncurrent \| branch	1		1
Lessee, operating and finance lease, number of options to renew \| lease_renewal_option	1		1
Operating lease right-of-use assets	$ 44,006,000		$ 44,006,000			$ 49,537,000
Operating lease liabilities	48,875,000		48,875,000			$ 55,187,000
Gain on lease modifications and terminations	$ 14,000	$ 0	$ 801,000	$ 0
Forecast \| Corporate headquarters
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets					$ 29,000,000
Operating lease liabilities					$ 30,000,000
Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating and finance lease, term of contract			1 year
Lessee, operating and finance lease, renewal term			20 years
Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating and finance lease, term of contract			34 years

Leases - Information Related to Company's Leases (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating leases	$ 44,006	$ 49,537
Finance leases	1,505	1,588
Total right-of-use assets	45,511	51,125
Operating leases	48,875	55,187
Finance leases	1,532	1,598
Total lease liabilities	$ 50,407	$ 56,785
Weighted average remaining lease term (in years) - operating	12 years 4 months 24 days	12 years 2 months 12 days
Weighted average remaining lease term (in years) - finance	13 years 7 months 6 days	14 years 4 months 24 days
Weighted average discount rate - operating	2.72%	2.65%
Weighted average discount rate - finance	1.76%	1.76%
Right-of-use asset - finance [Extensible Enumeration]	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Lease liabilities - finance [Extensible Enumeration]	Borrowings	Borrowings

Leases - Lease Expense (Details) - USD ($)	3 Months Ended		9 Months Ended
Leases - Lease Expense (Details) - USD ($)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Operating lease, amortization of right-of-use asset	$ 1,838,000	$ 1,663,000	$ 5,948,000	$ 4,341,000
Operating lease, short-term lease cost	107,000	95,000	296,000	261,000
Operating lease, variable lease cost	284,000	78,000	760,000	376,000
Operating lease, gain on lease modifications and terminations	(14,000)	0	(801,000)	0
Finance lease, interest on lease liabilities	7,000	0	21,000	0
Finance lease, amortization of right-of-use asset	28,000	0	83,000	0
Total lease cost	$ 2,250,000	$ 1,836,000	$ 6,307,000	$ 4,978,000

Leases - Maturity Analysis of Operating and Finance Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Operating Leases
September 30, 2022	$ 7,434
September 30, 2023	6,110
September 30, 2024	5,180
September 30, 2025	4,765
September 30, 2026	4,637
Thereafter	29,784
Total undiscounted future minimum lease payments	57,910
Less: imputed interest	(9,035)
Operating leases	48,875	$ 55,187
Finance Lease
September 30, 2022	116
September 30, 2023	117
September 30, 2024	119
September 30, 2025	121
September 30, 2026	123
Thereafter	1,133
Total undiscounted future minimum lease payments	1,729
Less: imputed interest	(197)
Finance leases	$ 1,532	$ 1,598

Mortgage servicing rights - Changes in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Servicing Asset at Fair Value, Amount [Roll Forward]
Carrying value at beginning of period	$ 101,615	$ 60,508	$ 79,997	$ 75,521
Capitalization	9,215	18,202	31,382	33,415
Mortgage servicing rights acquired from Franklin, at fair value	0	4,850	0	4,850
Change in fair value:
Due to pay-offs/pay-downs	(7,302)	(7,756)	(24,488)	(19,676)
Due to change in valuation inputs or assumptions	7,063	581	23,700	(22,575)
Carrying value at end of period	$ 110,591	$ 71,535	$ 110,591	$ 71,535

Mortgage servicing rights - Servicing Income and Expense Included in Mortgage Banking Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Servicing income:
Servicing income	$ 7,539	$ 5,536	$ 21,258	$ 15,667
Change in fair value of mortgage servicing rights	(239)	(7,175)	(788)	(42,251)
Change in fair value of derivative hedging instruments	(2,128)	(265)	(9,987)	15,705
Servicing income (loss)	5,172	(1,904)	10,483	(10,879)
Servicing expenses	2,156	1,999	7,381	5,392
Net servicing income (loss)	$ 3,016	$ (3,903)	$ 3,102	$ (16,271)

Mortgage servicing rights - Data and Key Economic Assumptions Related to Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Transfers and Servicing of Financial Assets [Abstract]
Unpaid principal balance	$ 10,633,805	$ 9,787,657
Weighted-average prepayment speed (CPR)	9.46%	14.07%
Estimated impact on fair value of a 10% increase	$ (4,737)	$ (4,493)
Estimated impact on fair value of a 20% increase	$ (9,107)	$ (8,599)
Discount rate	11.56%	11.49%
Estimated impact on fair value of a 100 bp increase	$ (4,454)	$ (2,942)
Estimated impact on fair value of a 200 bp increase	$ (8,571)	$ (5,674)
Weighted-average coupon interest rate	3.29%	3.58%
Weighted-average servicing fee (basis points)	0.27%	0.28%
Weighted-average remaining maturity (in months)	330 months	328 months

Mortgage servicing rights - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Transfers and Servicing of Financial Assets [Abstract]
Mortgage escrow deposit	$ 190,631	$ 147,957

Income taxes - Allocation of Federal and State Income Taxes between Current and Deferred Portions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Current	$ 2,350	$ 13,123	$ 17,840	$ 37,038
Deferred	7,366	(15,163)	20,904	(31,543)
Total	$ 9,716	$ (2,040)	$ 38,744	$ 5,495

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Income taxes - Reconciliation of Income Taxes Computed at the United States Federal Statutory Tax Rates to the Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Federal taxes calculated at statutory rate, amount	$ 11,551	$ (1,604)	$ 37,844	$ 4,938
Amount increase (decrease) resulting from:
State taxes, net of federal benefit	3,279	100	6,908	1,266
(Benefit) expense from equity based compensation	(1,784)	(7)	(2,129)	154
Municipal interest income, net of interest disallowance	(416)	(422)	(1,259)	(996)
Bank owned life insurance	(74)	(55)	(240)	(90)
NOL Carryback provision under CARES Act	(3,424)		(3,424)
Merger and offering costs	0	126	127	289
Section 162(m) limitation	1,065	0	1,313
Other	(481)	(178)	(396)	(66)
Total	$ 9,716	$ (2,040)	$ 38,744	$ 5,495
Federal taxes calculated at statutory rate, percent	21.00%	21.00%	21.00%	21.00%
Percentage increase (decrease) resulting from:
State taxes, net of federal benefit	6.00%	(1.30%)	3.80%	5.40%
(Benefit) expense from equity based compensation	(3.20%)	0.10%	(1.20%)	0.70%
Municipal interest income, net of interest disallowance	(0.80%)	5.50%	(0.70%)	(4.20%)
Bank owned life insurance	(0.10%)	0.70%	(0.10%)	(0.40%)
NOL Carryback provision under CARES Act	(0.062)		(0.019)
Merger and offering costs	0.00%	(1.60%)	0.10%	1.20%
Section 162(m) limitation	0.019	0	0.007	0
Other	(0.90%)	2.30%	(0.20%)	(0.30%)
Total	17.70%	26.70%	21.50%	23.40%

Income taxes - Schedule of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for credit losses	$ 38,751	$ 48,409
Operating lease liabilities	13,134	14,496
Federal net operating loss	1,541	1,753
Deferred compensation	6,798	8,872
Unrealized loss on cash flow hedges	326	499
Other	13,886	19,101
Subtotal	74,436	93,130
Deferred tax liabilities:
FHLB stock dividends	(484)	(561)
Operating leases - right of use assets	(11,726)	(13,197)
Depreciation	(7,276)	(7,491)
Amortization of core deposit intangibles	(200)	(684)
Unrealized gain on equity securities	(3,879)	(17)
Unrealized gain on debt securities	(3,913)	(13,027)
Mortgage servicing rights	(28,774)	(20,803)
Goodwill	(13,133)	(11,301)
Other	(4,407)	(9,653)
Subtotal	(73,792)	(76,734)
Net deferred tax assets	$ 644	$ 16,396

Income taxes - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Acquired net operating losses	$ 1,541	$ 1,753
Franklin Financial Network, Inc.
Business Acquisition [Line Items]
Acquired net operating losses	$ 7,338

Commitments and contingencies - Financial Instruments with Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Balance at end of period	$ 2,889,884	$ 2,787,594
Commitments to extend credit, excluding interest rate lock commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Balance at end of period	2,826,186	2,719,996
Letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Balance at end of period	$ 63,698	$ 67,598

Commitments and contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Floating interest rate loan commitments			$ 2,030,000		$ 1,650,000
Total principal amount of loans repurchased or indemnified	$ 2,917	$ 1,329	$ 4,386	$ 5,696

Commitments and contingencies - Allowance for Credit Losses on Unfunded Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Commitments and Contingencies [Roll Forward]
Balance at beginning of period	$ 144,663	$ 113,129	$ 170,389	$ 31,139
Balance at end of period	139,446	183,973	139,446	183,973
Unfunded Commitments
Commitments and Contingencies [Roll Forward]
Balance at beginning of period	13,202	6,500	16,378	0
Impact of CECL adoption on provision for credit losses on unfunded commitments	0	0	0	2,947
Increase in provision for credit losses from unfunded commitments acquired in business combination	0	10,429	0	10,499
Provision for credit losses on unfunded commitments	301	(862)	(2,875)	2,621
Balance at end of period	$ 13,503	$ 16,067	$ 13,503	$ 16,067

Commitments and contingencies - Activity in the Repurchase Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Commitments and Contingencies [Roll Forward]
Balance at beginning of period	$ 5,489	$ 4,601	$ 5,928	$ 3,529
Provision for loan repurchases or indemnifications	0	901	(266)	2,128
Losses on loans repurchased or indemnified	(120)	(44)	(293)	(199)
Balance at end of period	$ 5,369	$ 5,458	$ 5,369	$ 5,458

Derivatives - Narrative (Details)	9 Months Ended	12 Months Ended
Derivatives - Narrative (Details)	Sep. 30, 2021 USD ($) derivative	Dec. 31, 2018 USD ($)	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Net liability position	$ 0		$ 0
Cash collateral pledged on derivatives	$ 68,910,000		57,985,000
Subordinated debt
Derivative [Line Items]
Number of derivative instruments \| derivative	2
Borrowings	$ 30,930,000
Interest rate swaps
Derivative [Line Items]
Gain on canceled derivatives		$ 1,564,000
Interest rate swaps \| Subordinated debt
Derivative [Line Items]
Notional amount	30,000,000
Fair value of contract of net liability balances of interest rate swaps	$ 1,247,000		$ 1,909,000
Interest rate swaps \| London Interbank Offered Rate (LIBOR) \| Subordinated debt
Derivative [Line Items]
Derivative variable interest rate	2.08%
Minimum
Derivative [Line Items]
Period to lock interest rate on mortgage loan commitments	45 days
Maximum
Derivative [Line Items]
Period to lock interest rate on mortgage loan commitments	90 days

Derivatives - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Not designated as hedging
Derivatives, Fair Value [Line Items]
Notional Amount	$ 3,246,008	$ 3,532,227
Asset	38,786	68,938
Liability	27,059	46,333
Not designated as hedging \| Interest rate contracts
Derivatives, Fair Value [Line Items]
Notional Amount	611,188	606,878
Asset	22,456	34,547
Liability	22,301	34,317
Not designated as hedging \| Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount	1,404,819	1,358,328
Asset	6,526	0
Liability	0	11,633
Not designated as hedging \| Interest rate-lock commitments
Derivatives, Fair Value [Line Items]
Notional Amount	738,201	1,191,621
Asset	9,804	34,391
Liability	0	0
Not designated as hedging \| Futures contracts
Derivatives, Fair Value [Line Items]
Notional Amount	491,800	375,400
Asset	0	0
Liability	4,758	383
Designated as hedging \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount	30,000	30,000
Asset	0	0
Liability	$ 1,247	$ 1,909

Derivatives - Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivatives, Fair Value [Line Items]
Net tax expenses on reclassification adjustment on gain on hedging activities	$ 0	$ 41	$ 0	$ 145
Net tax expenses (benefits) recognized on net change in unrealized gain (loss) on hedging activities	38	40	173	(403)
Amount of gain (loss) recognized in other comprehensive income	106	112	489	(1,145)
Not designated as hedging \| Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(6,274)	(11,141)	(10,715)	(10,046)
Not designated as hedging \| Interest rate-lock commitments \| Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(3,316)	5,994	(24,587)	35,997
Not designated as hedging \| Forward commitments \| Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(806)	(16,548)	23,252	(56,998)
Not designated as hedging \| Futures contracts \| Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(2,152)	(587)	(9,380)	10,955
Designated as hedging
Derivatives, Fair Value [Line Items]
Total	(148)	(22)	(428)	199
Designated as hedging \| Interest Expense on Borrowings
Derivatives, Fair Value [Line Items]
Amount of gain (loss) reclassified from other comprehensive income and recognized in interest expense on borrowings	0	115	0	410
Loss included in interest expense on borrowings	$ (148)	$ (137)	$ (428)	$ (211)

Derivatives - Offsetting Derivative Assets and Liabilities (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Offsetting Derivative Assets
Gross amounts recognized	$ 4,813,000	$ 3,863,000
Gross amounts offset in the consolidated balance sheets	0	0
Net amounts presented in the consolidated balance sheets	4,813,000	3,863,000
Gross amounts not offset in the consolidated balance sheets, less financial instruments	3,816,000	857,000
Gross amounts not offset in the consolidated balance sheets, less financial collateral pledged	0	0
Net amounts	997,000	3,006,000
Offsetting Derivative Liabilities
Gross amounts recognized	19,467,000	34,051,000
Gross amounts offset in the consolidated balance sheets	0	0
Net amounts presented in the consolidated balance sheets	19,467,000	34,051,000
Gross amounts not offset in the consolidated balance sheets, less financial instruments	3,816,000	857,000
Gross amounts not offset in the consolidated balance sheets, less financial collateral pledged	15,651,000	33,194,000
Net amounts	$ 0	$ 0

Fair value of financial instruments - Estimated Fair Values and Carrying Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Financial assets:
Net loans	$ 7,155,228	$ 6,912,570
Loans held for sale	855,706		$ 899,173
Interest receivable	41,393	43,603
Carrying amount
Financial assets:
Cash and cash equivalents	1,324,564	1,317,898
Investment securities	1,577,337	1,176,991
Net loans	7,155,228	6,912,570
Loans held for sale	855,706	899,173
Interest receivable	41,393	43,603
Mortgage servicing rights	110,591	79,997
Derivatives	38,786	68,938
Financial liabilities:
Deposits, Without stated maturities	8,884,429	8,020,783
Deposits, With stated maturities	1,187,489	1,437,254
Securities sold under agreement to repurchase and federal funds sold	41,730	32,199
Subordinated debt	129,448	189,527
Other borrowings	1,532	16,598
Interest payable	2,394	6,772
Derivatives	28,306	48,242
Fair Value
Financial assets:
Cash and cash equivalents	1,324,564	1,317,898
Investment securities	1,577,337	1,176,991
Net loans	7,255,887	7,058,693
Loans held for sale	855,706	899,173
Interest receivable	41,393	43,603
Mortgage servicing rights	110,591	79,997
Derivatives	38,786	68,938
Financial liabilities:
Deposits, Without stated maturities	8,884,429	8,020,783
Deposits, With stated maturities	1,196,141	1,446,605
Securities sold under agreement to repurchase and federal funds sold	41,730	32,199
Subordinated debt	134,668	192,149
Other borrowings	1,532	16,598
Interest payable	2,394	6,772
Derivatives	28,306	48,242
Fair Value \| Level 1
Financial assets:
Cash and cash equivalents	1,324,564	1,317,898
Investment securities	0	0
Net loans	0	0
Loans held for sale	0	0
Interest receivable	30	33
Mortgage servicing rights	0	0
Derivatives	0	0
Financial liabilities:
Deposits, Without stated maturities	8,884,429	8,020,783
Deposits, With stated maturities	0	0
Securities sold under agreement to repurchase and federal funds sold	41,730	32,199
Subordinated debt	0	0
Other borrowings	0	0
Interest payable	138	327
Derivatives	0	0
Fair Value \| Level 2
Financial assets:
Cash and cash equivalents	0	0
Investment securities	1,577,337	1,176,991
Net loans	0	0
Loans held for sale	755,210	683,770
Interest receivable	6,448	5,254
Mortgage servicing rights	0	0
Derivatives	38,786	68,938
Financial liabilities:
Deposits, Without stated maturities	0	0
Deposits, With stated maturities	1,196,141	1,446,605
Securities sold under agreement to repurchase and federal funds sold	0	0
Subordinated debt	0	0
Other borrowings	1,532	16,598
Interest payable	1,873	4,210
Derivatives	28,306	48,242
Fair Value \| Level 3
Financial assets:
Cash and cash equivalents	0	0
Investment securities	0	0
Net loans	7,255,887	7,058,693
Loans held for sale	100,496	215,403
Interest receivable	34,915	38,316
Mortgage servicing rights	110,591	79,997
Derivatives	0	0
Financial liabilities:
Deposits, Without stated maturities	0	0
Deposits, With stated maturities	0	0
Securities sold under agreement to repurchase and federal funds sold	0	0
Subordinated debt	134,668	192,149
Other borrowings	0	0
Interest payable	383	2,235
Derivatives	$ 0	$ 0

Fair value of financial instruments - Balances and Levels of Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Financial assets:
Available-for-sale debt securities, at fair value	$ 1,572,558	$ 1,172,400
Equity securities, at fair value	4,779	4,591
Loans held for sale	855,706		$ 899,173
Mortgage-backed securities - residential
Financial assets:
Available-for-sale debt securities, at fair value	1,210,503	773,336
Mortgage-backed securities - commercial
Financial assets:
Available-for-sale debt securities, at fair value	15,712	21,588
Municipal securities
Financial assets:
Available-for-sale debt securities, at fair value	327,239	356,329
Treasury securities
Financial assets:
Available-for-sale debt securities, at fair value	6,006	16,628
Corporate securities
Financial assets:
Available-for-sale debt securities, at fair value	2,527	2,516
Recurring Basis
Financial assets:
Equity securities, at fair value	4,779	4,591
Total securities	1,577,337	1,176,991
Loans held for sale	855,706	899,173
Mortgage servicing rights	110,591	79,997
Derivatives	38,786	68,938
Financial liabilities:
Derivatives	28,306	48,242
Recurring Basis \| U.S. government agency securities
Financial assets:
Available-for-sale debt securities, at fair value	10,571	2,003
Recurring Basis \| Mortgage-backed securities - residential
Financial assets:
Available-for-sale debt securities, at fair value	1,210,503	773,336
Recurring Basis \| Mortgage-backed securities - commercial
Financial assets:
Available-for-sale debt securities, at fair value	15,712	21,588
Recurring Basis \| Municipal securities
Financial assets:
Available-for-sale debt securities, at fair value	327,239
Recurring Basis \| Municipals, tax-exempt
Financial assets:
Available-for-sale debt securities, at fair value		356,329
Recurring Basis \| Treasury securities
Financial assets:
Available-for-sale debt securities, at fair value	6,006	16,628
Recurring Basis \| Corporate securities
Financial assets:
Available-for-sale debt securities, at fair value	2,527	2,516
Recurring Basis \| Quoted prices in active markets for identical assets (liabilities) (level 1)
Financial assets:
Equity securities, at fair value	0	0
Total securities	0	0
Loans held for sale	0	0
Mortgage servicing rights	0	0
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring Basis \| Quoted prices in active markets for identical assets (liabilities) (level 1) \| U.S. government agency securities
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Quoted prices in active markets for identical assets (liabilities) (level 1) \| Mortgage-backed securities - residential
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Quoted prices in active markets for identical assets (liabilities) (level 1) \| Mortgage-backed securities - commercial
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Quoted prices in active markets for identical assets (liabilities) (level 1) \| Municipal securities
Financial assets:
Available-for-sale debt securities, at fair value	0
Recurring Basis \| Quoted prices in active markets for identical assets (liabilities) (level 1) \| Municipals, tax-exempt
Financial assets:
Available-for-sale debt securities, at fair value		0
Recurring Basis \| Quoted prices in active markets for identical assets (liabilities) (level 1) \| Treasury securities
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Quoted prices in active markets for identical assets (liabilities) (level 1) \| Corporate securities
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Significant other observable inputs (level 2)
Financial assets:
Equity securities, at fair value	4,779	4,591
Total securities	1,577,337	1,176,991
Loans held for sale	755,210	683,770
Mortgage servicing rights	0	0
Derivatives	38,786	68,938
Financial liabilities:
Derivatives	28,306	48,242
Recurring Basis \| Significant other observable inputs (level 2) \| U.S. government agency securities
Financial assets:
Available-for-sale debt securities, at fair value	10,571	2,003
Recurring Basis \| Significant other observable inputs (level 2) \| Mortgage-backed securities - residential
Financial assets:
Available-for-sale debt securities, at fair value	1,210,503	773,336
Recurring Basis \| Significant other observable inputs (level 2) \| Mortgage-backed securities - commercial
Financial assets:
Available-for-sale debt securities, at fair value	15,712	21,588
Recurring Basis \| Significant other observable inputs (level 2) \| Municipal securities
Financial assets:
Available-for-sale debt securities, at fair value	327,239
Recurring Basis \| Significant other observable inputs (level 2) \| Municipals, tax-exempt
Financial assets:
Available-for-sale debt securities, at fair value		356,329
Recurring Basis \| Significant other observable inputs (level 2) \| Treasury securities
Financial assets:
Available-for-sale debt securities, at fair value	6,006	16,628
Recurring Basis \| Significant other observable inputs (level 2) \| Corporate securities
Financial assets:
Available-for-sale debt securities, at fair value	2,527	2,516
Recurring Basis \| Significant unobservable inputs (level 3)
Financial assets:
Equity securities, at fair value	0	0
Total securities	0	0
Loans held for sale	100,496	215,403
Mortgage servicing rights	110,591	79,997
Derivatives	0	0
Financial liabilities:
Derivatives	0	0
Recurring Basis \| Significant unobservable inputs (level 3) \| U.S. government agency securities
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Significant unobservable inputs (level 3) \| Mortgage-backed securities - residential
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Significant unobservable inputs (level 3) \| Mortgage-backed securities - commercial
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Significant unobservable inputs (level 3) \| Municipal securities
Financial assets:
Available-for-sale debt securities, at fair value	0
Recurring Basis \| Significant unobservable inputs (level 3) \| Municipals, tax-exempt
Financial assets:
Available-for-sale debt securities, at fair value		0
Recurring Basis \| Significant unobservable inputs (level 3) \| Treasury securities
Financial assets:
Available-for-sale debt securities, at fair value	0	0
Recurring Basis \| Significant unobservable inputs (level 3) \| Corporate securities
Financial assets:
Available-for-sale debt securities, at fair value	$ 0	$ 0

Fair value of financial instruments - Balances and Levels of Assets Measured at Fair Value on Non-recurring Basis (Details) - Non-recurring Basis - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financial assets:
Other real estate owned	$ 6,192	$ 6,662
Collateral dependent loans	5,884	6,153
Commercial and industrial
Financial assets:
Collateral dependent loans	101	684
Construction
Financial assets:
Collateral dependent loans	606
Residential real estate \| Residential line of credit
Financial assets:
Collateral dependent loans	311	311
Commercial real estate \| Owner occupied
Financial assets:
Collateral dependent loans	315	136
Commercial real estate \| Non-owner occupied
Financial assets:
Collateral dependent loans	4,527	5,022
Consumer and other
Financial assets:
Collateral dependent loans	24
Quoted prices in active markets for identical assets (liabilities) (level 1)
Financial assets:
Other real estate owned	0	0
Collateral dependent loans	0	0
Quoted prices in active markets for identical assets (liabilities) (level 1) \| Commercial and industrial
Financial assets:
Collateral dependent loans	0	0
Quoted prices in active markets for identical assets (liabilities) (level 1) \| Construction
Financial assets:
Collateral dependent loans	0
Quoted prices in active markets for identical assets (liabilities) (level 1) \| Residential real estate \| Residential line of credit
Financial assets:
Collateral dependent loans	0	0
Quoted prices in active markets for identical assets (liabilities) (level 1) \| Commercial real estate \| Owner occupied
Financial assets:
Collateral dependent loans	0	0
Quoted prices in active markets for identical assets (liabilities) (level 1) \| Commercial real estate \| Non-owner occupied
Financial assets:
Collateral dependent loans	0	0
Quoted prices in active markets for identical assets (liabilities) (level 1) \| Consumer and other
Financial assets:
Collateral dependent loans	0
Significant other observable inputs (level 2)
Financial assets:
Other real estate owned	0	0
Collateral dependent loans	0	0
Significant other observable inputs (level 2) \| Commercial and industrial
Financial assets:
Collateral dependent loans	0	0
Significant other observable inputs (level 2) \| Construction
Financial assets:
Collateral dependent loans	0
Significant other observable inputs (level 2) \| Residential real estate \| Residential line of credit
Financial assets:
Collateral dependent loans	0	0
Significant other observable inputs (level 2) \| Commercial real estate \| Owner occupied
Financial assets:
Collateral dependent loans	0	0
Significant other observable inputs (level 2) \| Commercial real estate \| Non-owner occupied
Financial assets:
Collateral dependent loans	0	0
Significant other observable inputs (level 2) \| Consumer and other
Financial assets:
Collateral dependent loans	0
Significant unobservable inputs (level 3)
Financial assets:
Other real estate owned	6,192	6,662
Collateral dependent loans	5,884	6,153
Significant unobservable inputs (level 3) \| Commercial and industrial
Financial assets:
Collateral dependent loans	101	684
Significant unobservable inputs (level 3) \| Construction
Financial assets:
Collateral dependent loans	606
Significant unobservable inputs (level 3) \| Residential real estate \| Residential line of credit
Financial assets:
Collateral dependent loans	311	311
Significant unobservable inputs (level 3) \| Commercial real estate \| Owner occupied
Financial assets:
Collateral dependent loans	315	136
Significant unobservable inputs (level 3) \| Commercial real estate \| Non-owner occupied
Financial assets:
Collateral dependent loans	4,527	$ 5,022
Significant unobservable inputs (level 3) \| Consumer and other
Financial assets:
Collateral dependent loans	$ 24

Fair value of financial instruments - Information about Significant Unobservable Inputs (Level 3) Used in Valuation of Assets Measured at Fair Value on Nonrecurring Basis (Details) - Non-recurring Basis $ in Thousands	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans	$ 5,884	$ 6,153
Other real estate owned	6,192	6,662
Significant unobservable inputs (level 3)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans	5,884	6,153
Other real estate owned	$ 6,192	$ 6,662
Significant unobservable inputs (level 3) \| Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans, measurement input	0	0
Other real estate owned, measurement input	0	0
Significant unobservable inputs (level 3) \| Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent loans, measurement input	0.30	0.30
Other real estate owned, measurement input	0.15	0.15

Fair value of financial instruments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Percent of remaining principal allowed to buy back under GNMA optional repurchase programs			100.00%
Level 3 \| Non-recurring Basis
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amortized costs of collateral dependent loans	$ 6,918		$ 6,918		$ 7,839
Mortgage Loans
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net gains (losses) from fair value changes of mortgage loans	(3,908)	$ 20,378	(14,894)	$ 6,512
GNMA
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Delinquent GNMA loans that had been previously sold	$ 105,094		$ 105,094		$ 151,184

Fair value of financial instruments - Loans Held for Sale at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans held for sale	$ 855,706		$ 899,173
Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans held for sale	100,496		215,403
Residential real estate \| 1-to-4 family mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans held for sale	755,210		$ 683,770
Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans held for sale	855,706	$ 899,173
Recurring Basis \| Commercial and industrial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans held for sale	100,496	215,403
Recurring Basis \| Residential real estate \| 1-to-4 family mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total loans held for sale	$ 755,210	$ 683,770

Fair value of financial instruments - Changes in Fair Value Associated with Commercial Loans Held for Sale (Details) - Franklin Financial Network, Inc. - Commercial and industrial - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Carrying amount
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value at beginning of period	$ 135,972	$ 0	$ 239,063	$ 0
Commercial loans held for sale acquired from Franklin		350,269		350,269
Change in fair value:
Pay-downs and pay-offs	(24,366)	(86,808)	(116,158)	(86,808)
Write-offs to discount			(11,299)
Changes in valuation included in other noninterest income	0		0	0
Carrying value at end of period	111,606	263,461	111,606	263,461
Fair Value Discount
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value at beginning of period	(11,850)	0	(23,660)	0
Commercial loans held for sale acquired from Franklin		(24,063)		(24,063)
Change in fair value:
Pay-downs and pay-offs	0	0	0	0
Write-offs to discount			11,299
Changes in valuation included in other noninterest income	740	1,858	1,251	1,858
Carrying value at end of period	(11,110)	(22,205)	(11,110)	(22,205)
Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Carrying value at beginning of period	124,122	0	215,403	0
Commercial loans held for sale acquired from Franklin		326,206		326,206
Change in fair value:
Pay-downs and pay-offs	(24,366)	(86,808)	(116,158)	(86,808)
Write-offs to discount			0
Changes in valuation included in other noninterest income	740	1,858	1,251	1,858
Carrying value at end of period	$ 100,496	$ 241,256	$ 100,496	$ 241,256

Fair value of financial instruments - Differences Between Fair Value and Principal Balance for Loans Held for Sale Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	$ 755,210	$ 683,770
Nonaccrual loans	5,625	6,406
Fair Value \| Past due 90 days or more
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value		83
Fair Value \| Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	94,871	208,914
Aggregate Unpaid Principal Balance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	738,221	651,887
Nonaccrual loans	10,692	12,033
Aggregate Unpaid Principal Balance \| Past due 90 days or more
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value		163
Aggregate Unpaid Principal Balance \| Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	100,914	226,867
Difference
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	16,989	31,883
Nonaccrual loans	(5,067)	(5,627)
Difference \| Past due 90 days or more
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value		(80)
Difference \| Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	$ (6,043)	$ (17,953)

Segment reporting - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
Segment reporting - Narrative (Details) $ in Thousands	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment channel	Sep. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of distinct reportable segments \| segment			2
Number of distinct delivery channels \| channel			2
Total net contribution reclassification to (from) segment realignment	$ 55,006	$ (7,639)	$ 180,210	$ 23,514
Banking
Segment Reporting Information [Line Items]
Total net contribution reclassification to (from) segment realignment	46,153	(46,805)	154,467	(57,287)
Mortgage
Segment Reporting Information [Line Items]
Total net contribution reclassification to (from) segment realignment	8,853	39,166	25,743	80,801
Interest paid	$ 6,075	3,940	$ 17,585	9,650
Segment Realignment, Reclassification Adjustment \| Banking
Segment Reporting Information [Line Items]
Total net contribution reclassification to (from) segment realignment		(9,508)		(18,382)
Segment Realignment, Reclassification Adjustment \| Mortgage
Segment Reporting Information [Line Items]
Total net contribution reclassification to (from) segment realignment		$ 9,508		$ 18,382

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123384075&loc=d3e41242-110953

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Segment reporting - Segment Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting Information [Line Items]
Net interest income	$ 88,476	$ 68,828	$ 257,615	$ 180,414
Provision for credit losses	(2,531)	55,401	(30,224)	110,887
Mortgage banking income	47,751	92,126	146,990	216,145
Change in fair value of mortgage servicing rights, net of hedging	(2,367)	(7,440)	(10,775)	(26,546)
Other noninterest income	13,622	12,340	38,821	31,618
Depreciation and amortization	2,140	1,823	6,288	5,315
Amortization of intangibles	1,344	1,417	4,178	3,825
Other noninterest expense	91,523	114,852	272,199	258,090
Income (loss) before income taxes	55,006	(7,639)	180,210	23,514
Income tax expense (benefit)	9,716	(2,040)	38,744	5,495
Net income (loss) applicable to FB Financial Corporation and noncontrolling interest	45,290	(5,599)	141,466	18,019
Net income applicable to noncontrolling interest	0	0	8	0
Net income (loss) applicable to FB Financial Corporation	45,290	(5,599)	141,458	18,019
Assets	11,810,290	11,010,438	11,810,290	11,010,438	$ 11,207,330
Goodwill	242,561	236,086	242,561	236,086	$ 242,561
Provision (reversal) for credit losses on unfunded commitments	301	9,567	(2,875)	13,050
Merger costs	0	20,730	0	25,366
Banking
Segment Reporting Information [Line Items]
Net interest income	88,576	68,791	257,726	180,374
Provision for credit losses	(2,531)	55,401	(30,224)	110,887
Mortgage banking income	0	0	0	0
Change in fair value of mortgage servicing rights, net of hedging	0	0	0	0
Other noninterest income	13,823	12,340	39,223	31,618
Depreciation and amortization	1,791	1,550	5,267	4,545
Amortization of intangibles	1,344	1,417	4,178	3,825
Other noninterest expense	55,642	69,568	163,261	150,022
Income (loss) before income taxes	46,153	(46,805)	154,467	(57,287)
Assets	10,712,281	10,143,956	10,712,281	10,143,956
Goodwill	242,561	236,086	242,561	236,086
Banking \| Franklin Financial Network, Inc.
Segment Reporting Information [Line Items]
Merger costs		20,400
Banking \| Farmers National
Segment Reporting Information [Line Items]
Merger costs				25,036
Mortgage
Segment Reporting Information [Line Items]
Net interest income	(100)	37	(111)	40
Provision for credit losses	0	0	0	0
Mortgage banking income	47,751	92,126	146,990	216,145
Change in fair value of mortgage servicing rights, net of hedging	(2,367)	(7,440)	(10,775)	(26,546)
Other noninterest income	(201)	0	(402)	0
Depreciation and amortization	349	273	1,021	770
Amortization of intangibles	0	0	0	0
Other noninterest expense	35,881	45,284	108,938	108,068
Income (loss) before income taxes	8,853	39,166	25,743	80,801
Assets	1,098,009	866,482	1,098,009	866,482
Goodwill	$ 0	0	$ 0	0
Mortgage \| Franklin Financial Network, Inc.
Segment Reporting Information [Line Items]
Merger costs		$ 330		$ 330

Minimum capital requirements (Details) $ in Thousands	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
FB Financial Corporation
Total Capital (to risk-weighted assets)
Actual, Amount	$ 1,400,521	$ 1,358,897
Actual, Ratio	0.146	0.150
Minimum Capital adequacy with capital buffer, Amount	$ 1,005,220	$ 952,736
Minimum Capital adequacy with capital buffer, Ratio	0.105	0.105
Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 1,213,432	$ 1,090,364
Actual, Ratio	0.127	0.120
Minimum Capital adequacy with capital buffer, Amount	$ 813,750	$ 771,262
Minimum Capital adequacy with capital buffer, Ratio	8.50%	8.50%
Tier 1 Capital (to average assets)
Actual, Amount	$ 1,213,432	$ 1,090,364
Actual, Ratio	0.104	0.100
Minimum Capital adequacy with capital buffer, Amount	$ 467,369	$ 435,064
Minimum Capital adequacy with capital buffer. Ratio	0.040	0.040
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 1,183,432	$ 1,060,364
Actual Ratio	12.40%	11.70%
Minimum Capital adequacy with capital buffer, Amount	$ 670,147	$ 635,157
Minimum Capital adequacy with capital buffer, Ratio	0.070	0.070
FirstBank
Total Capital (to risk-weighted assets)
Actual, Amount	$ 1,352,956	$ 1,353,279
Actual, Ratio	0.142	0.149
Minimum Capital adequacy with capital buffer, Amount	$ 1,003,252	$ 951,327
Minimum Capital adequacy with capital buffer, Ratio	0.105	0.105
To be well capitalized under prompt corrective action provisions, Amount	$ 955,478	$ 906,026
To be well capitalized under prompt corrective action provisions, Ratio	0.100	0.100
Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 1,165,867	$ 1,142,548
Actual, Ratio	0.122	0.126
Minimum Capital adequacy with capital buffer, Amount	$ 812,156	$ 770,122
Minimum Capital adequacy with capital buffer, Ratio	8.50%	8.50%
To be well capitalized under prompt corrective action provisions Amount	$ 764,382	$ 724,820
To be well capitalized under prompt corrective action provisions Ratio	0.080	0.080
Tier 1 Capital (to average assets)
Actual, Amount	$ 1,165,867	$ 1,142,548
Actual, Ratio	0.100	0.105
Minimum Capital adequacy with capital buffer, Amount	$ 465,817	$ 435,279
Minimum Capital adequacy with capital buffer. Ratio	0.040	0.040
To be well capitalized under prompt corrective action provisions, Amount	$ 582,271	$ 544,098
To be well capitalized under prompt corrective action provisions, Ratio	0.050	0.050
Common Equity Tier 1 Capital (to risk-weighted assets)
Actual, Amount	$ 1,165,867	$ 1,142,548
Actual Ratio	12.20%	12.60%
Minimum Capital adequacy with capital buffer, Amount	$ 668,835	$ 634,218
Minimum Capital adequacy with capital buffer, Ratio	0.070	0.070
To be well capitalized under prompt corrective action provisions, Amount	$ 621,061	$ 588,917
To be well capitalized under prompt corrective action provisions, Ratio	6.50%	6.50%

Stock-based compensation - Changes in Restricted Stock Units (Details) - RSUs - $ / shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Restricted Stock Units Outstanding
Balance at beginning of period (in shares)	1,047,071,000	826,263,000
Granted (in shares)	194,388,000	353,891,000
Vested (in shares)	(699,156,000)	(145,157,000)
Forfeited (in shares)	(34,298,000)	(19,269,000)
Balance at end of period (in shares)	508,005,000	1,015,728,000
Weighted Average Grant Date Fair Value
Balance at beginning of period (in dollars per share)	$ 26.06	$ 23.76
Granted (in dollars per share)	43.06	31.12
Vested (in dollars per share)	22.80	31.67
Forfeited (in dollars per share)	28.06	33.19
Balance at end of period (in dollars per share)	$ 36.01	$ 25.83
Franklin
Restricted Stock Units Outstanding
Granted (in shares)		118,776

Stock-based compensation - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost related to nonvested awards			$ 8,065	$ 7,253
Dividends declared not paid on restricted stock units	$ 340	$ 139	$ 340	139
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance (in shares)	2,341,696		2,341,696		2,379,006
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock units vested and released	$ 10,749	3,549	$ 15,941	4,597
Compensation cost related to nonvested awards	2,365	4,651	7,024	6,666
Unrecognized compensation cost related to nonvested awards	13,616		$ 13,616		$ 13,436
Expected weighted-average period to be recognized			2 years 8 months 12 days		2 years 6 months
Dividends declared not paid on restricted stock units	232		$ 232		$ 613
RSUs \| Independent Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost related to nonvested awards	$ 168	237	$ 467	615
RSUs \| 2016-LTIP Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuable (in shares)	1,822,506		1,822,506		2,240,434
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost related to nonvested awards	$ 551	$ 171	$ 1,041	$ 587
Unrecognized compensation cost related to nonvested awards	$ 7,279		$ 7,279
Expected weighted-average period to be recognized			2 years 1 month 6 days
Core return threshold percentages			200.00%
Award vesting, percentage	150.00%		100.00%
PSUs \| Executives and Other Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Criteria period			3 years
Vesting period			3 years
PSUs \| Executives and Other Officers \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Core return threshold percentages			0.00%
PSUs \| Executives and Other Officers \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Core return threshold percentages			200.00%
Employee Stock \| ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuable (in shares)	200,000		200,000
Purchase price percentage of subsequent offering periods			95.00%
Maximum number of shares per participant (in shares)			725
Maximum worth of award per participant			$ 25
Shares issued under plan (in shares)	15,744,000	18,034,000	37,310,000	30,179,000

Stock-based compensation - Changes in Performance Stock Units (Details) - PSUs - $ / shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Restricted Stock Units Outstanding
Balance at beginning of period (in shares)	53,147	0
Granted (in shares)	65,304	53,147
Vested (in shares)	0	0
Forfeited or expired (in shares)	(2,319)	0
Balance at end of period (in shares)	116,132	53,147
Weighted Average Grant Date Fair Value
Balance at beginning of period (in dollars per share)	$ 36.21	$ 0
Granted (in dollars per share)	43.20	36.21
Vested (in dollars per share)	0	0
Forfeited (in dollars per share)	36.73	0
Balance at end of period (in dollars per share)	$ 40.13	$ 36.21

Related party transactions - Loans Analysis to Executive Officers, Certain Management, Bank Directors and Their Affiliates (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Financing Receivable, Related Parties [Roll Forward]
Loans outstanding at January 1, 2021	$ 24,675
New loans and advances	12,116
Change in related party status	(108)
Repayments	(5,939)
Loans outstanding at September 30, 2021	$ 30,744

Related party transactions - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Deposits from related parties	$ 320,207,000		$ 320,207,000		$ 245,084,000
Aviation Time Sharing Agreement
Related Party Transaction [Line Items]
Payments to related party	0	$ 17,000	32,000	$ 108,000
Certain Executive Officers, Certain Management and Directors and Their Associates \| Unfunded Loan Commitment
Related Party Transaction [Line Items]
Unfunded commitments	13,678,000		13,678,000		23,059,000
Director
Related Party Transaction [Line Items]
Unamortized leasehold improvements	13,000		13,000		$ 53,000
Operating lease expense	128,000	125,000	388,000	381,000
Former Majority Shareholder \| Registration Right Agreement
Related Party Transaction [Line Items]
Share registration expenses	$ 0	$ 0	$ 605,000	$ 0