Seacoast Banking Corporation of Florida (SBCF) 10-Q 6 May 22 2022 Q1 Quarterly report Financial data

Cover Page

Cover Page	3 Months Ended
	Mar. 31, 2022shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	0-13660
Entity Registrant Name	Seacoast Banking Corporation of Florida
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	59-2260678
Entity Address, Address Line One	815 COLORADO AVENUE,
Entity Address, City or Town	STUART
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	34994
City Area Code	(772)
Local Phone Number	287-4000
Title of 12(b) Security	Common Stock
Trading Symbol	SBCF
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	61,238,897
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000730708
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Interest and fees on loans	$ 67,118	$ 62,298
Interest and dividends on securities	10,181	6,446
Interest on interest bearing deposits and other investments	933	586
Total Interest Income	78,232	69,330
Interest on deposits	767	1,065
Interest on time certificates	468	1,187
Interest on borrowed money	475	468
Total Interest Expense	1,710	2,720
Net Interest Income	76,522	66,610
Provision for credit losses	6,556	(5,715)
Net Interest Income after Provision for Credit Losses	69,966	72,325
Noninterest income:
Service charges on deposit accounts	2,801	2,338
Interchange income	4,128	3,820
Wealth management income	2,659	2,323
Mortgage banking fees	1,686	4,225
Marine finance fees	191	189
SBA gains	156	287
BOLI income	1,334	859
Other	2,870	3,744
Noninterest income, excluding securities gains (losses)	15,825	17,785
Securities losses, net	(452)	(114)
Total Noninterest Income	15,373	17,671
Noninterest Expense:
Salaries and wages	28,219	21,393
Employee benefits	5,501	4,980
Outsourced data processing costs	6,156	4,468
Telephone / data lines	733	785
Occupancy	3,986	3,789
Furniture and equipment	1,426	1,254
Marketing	1,171	1,168
Legal and professional fees	4,789	2,582
FDIC assessments	789	526
Amortization of intangibles	1,446	1,211
Foreclosed property expense and net gain on sale	(164)	(65)
Provision for credit losses on unfunded commitments	142	0
Other	4,723	4,029
Total Noninterest Expense	58,917	46,120
Income Before Income Taxes	26,422	43,876
Provision for income taxes	5,834	10,157
Net Income	$ 20,588	$ 33,719
Net income per share of common stock
Diluted (in dollars per share)	$ 0.33	$ 0.60
Basic (in dollars per share)	$ 0.34	$ 0.61
Average common shares outstanding
Diluted (in shares)	61,704	55,992
Basic (in shares)	61,127	55,271

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 20,588	$ 33,719
Available-for-sale securities:
Unrealized losses on available-for-sale securities, net of tax benefit of $20.6 million and $3.1 million for the three months ended March 31, 2022 and 2021, respectively	(66,012)	(10,851)
Amortization of unrealized gains and losses on securities transferred to held-to-maturity, net of tax expense of $7 thousand and $6 thousand for the three months ended March 31, 2022 and 2021, respectively	36	24
Available-for-sale securities, net of tax	(65,976)	(10,827)
Unrealized losses on derivatives designated as cash flow hedges, net of reclassifications to income, net of tax benefit of $22 thousand and $47 thousand for the three months ended March 31, 2022 and 2021, respectively	(64)	(138)
Total other comprehensive loss	(66,040)	(10,965)
Comprehensive (Loss) Income	$ (45,452)	$ 22,754

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Unrealized losses on available-for-sale securities, tax benefit	$ 20,600	$ 3,100
Amortization of unrealized gains and losses on securities transferred to held-to-maturity, tax expense	7	6
Unrealized losses on cash flow hedging derivatives, net of reclassifications, tax benefit	$ 22	$ 47

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets
Cash and due from banks	$ 351,128	$ 238,750
Interest bearing deposits with other banks	871,387	498,979
Total cash and cash equivalents	1,222,515	737,729
Time deposits with other banks	5,975	0
Debt securities:
Securities available-for-sale (at fair value)	1,706,619	1,644,319
Securities held-to-maturity (fair value $709.5 million at March 31, 2022 and $627.4 million at December 31, 2021)	747,004	638,640
Total debt securities	2,453,623	2,282,959
Loans held for sale (at fair value)	20,615	31,791
Loans	6,451,217	5,925,029
Less: Allowance for credit losses	(89,838)	(83,315)
Loans, net of allowance for credit losses	6,361,379	5,841,714
Bank premises and equipment, net	74,617	72,404
Other real estate owned	11,567	13,618
Goodwill	286,606	252,154
Other intangible assets, net	21,549	14,845
Bank owned life insurance	206,375	205,041
Net deferred tax assets	47,222	27,321
Other assets	192,774	201,857
Total Assets	10,904,817	9,681,433
Liabilities
Deposits	9,243,768	8,067,589
Securities sold under agreements to repurchase, maturing within 30 days	120,922	121,565
Subordinated debt	71,716	71,646
Other liabilities	112,126	109,897
Total Liabilities	9,548,532	8,370,697
Shareholders' Equity
Common stock, par value $0.10 per share, authorized 120,000,000 shares, issued 61,640,882 and outstanding 61,238,897 at March 31, 2022, and authorized 120,000,000, issued 58,909,369 and outstanding 58,504,250 shares at December 31, 2021	6,124	5,850
Other shareholders' equity	1,350,161	1,304,886
Total Shareholders' Equity	1,356,285	1,310,736
Total Liabilities and Shareholders' Equity	$ 10,904,817	$ 9,681,433

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Held to maturity, fair value	$ 709,492	$ 627,398
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares issued (in shares)	61,640,882	58,909,369
Common stock, shares outstanding (in shares)	61,238,897	58,504,250

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows from Operating Activities
Net income	$ 20,588	$ 33,719
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,420	1,440
Amortization of premiums and discounts on securities, net	361	2,362
Amortization of operating lease right-of-use assets	990	1,102
Other amortization and accretion, net	(1,173)	(4,437)
Stock based compensation	1,419	1,759
Origination of loans designated for sale	(57,625)	(163,863)
Sale of loans designated for sale	71,210	177,516
Provision for credit losses	6,556	(5,715)
Deferred income taxes	866	2,320
Gains on sale of loans	(2,324)	(5,570)
Gains on sale and write-downs of other real estate owned	(255)	(167)
Losses on disposition of fixed assets and write-downs upon transfer of bank premises to other real estate owned	31	315
Changes in operating assets and liabilities, net of effects from acquired companies:
Net decrease in other assets	15,471	4,658
Net (decrease) increase in other liabilities	(3,001)	1,659
Net cash provided by operating activities	54,534	47,098
Cash Flows from Investing Activities
Maturities and repayments of debt securities available-for-sale	95,398	155,860
Maturities and repayments of debt securities held-to-maturity	26,430	43,291
Proceeds from sale of debt securities available-for-sale	26,011	0
Purchases of debt securities available-for-sale	(244,551)	(36,512)
Purchases of debt securities held-to-maturity	(134,941)	(160,031)
Maturities of time deposits with other banks	498	0
Net new loans and principal repayments	(44,256)	79,353
Purchases of loans held for investment	(111,292)	0
Proceeds from sale of other real estate owned	3,742	1,340
Additions to other real estate owned	(319)	(654)
Proceeds from sale of FHLB and Federal Reserve Bank Stock	0	2,704
Purchase of FHLB and Federal Reserve Bank Stock	(3,347)	(55)
Net cash from bank acquisitions	208,933	0
Additions to bank premises and equipment	(825)	(341)
Net cash used in investing activities	(178,519)	84,955
Cash Flows from Financing Activities
Net increase in deposits	613,899	453,188
Net decrease in repurchase agreements	(643)	(10,438)
Stock based employee benefit plans	3,509	434
Dividends paid	(7,994)	0
Net cash provided by financing activities	608,771	443,184
Net increase in cash and cash equivalents	484,786	575,237
Cash and cash equivalents at beginning of period	737,729	404,088
Cash and cash equivalents at end of period	1,222,515	979,325
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	1,673	3,695
Recognition of operating lease right-of-use assets, other than through bank acquisitions	3,370	0
Recognition of operating lease liabilities, other than through bank acquisitions	3,370	0
Supplemental disclosure of non-cash investing activities:
Transfer of debt securities from available-for-sale to held-to-maturity	0	210,805
Transfers from bank premises to other real estate owned	$ 1,008	$ 3,318

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		55,243
Beginning balance at Dec. 31, 2020	$ 1,130,402	$ 5,524	$ 856,092	$ 256,701	$ (8,285)	$ 20,370
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	22,754			33,719		(10,965)
Stock based compensation expense	1,759		1,759
Common stock transactions related to stock based employee benefit plans (in shares)		20
Common stock transactions related to stock based employee benefit plans	(406)	$ 2			(408)
Common stock issued for stock options (in shares)		31
Common stock issued for stock options	840	$ 3	837
Increase (decrease) in shares during period (in shares)		51
Increase (decrease) in stockholders' equity during period	24,947	$ 5	2,596	33,719	(408)	(10,965)
Ending balance (in shares) at Mar. 31, 2021		55,294
Ending balance at Mar. 31, 2021	1,155,349	$ 5,529	858,688	290,420	(8,693)	9,405
Beginning balance (in shares) at Dec. 31, 2021		58,504
Beginning balance at Dec. 31, 2021	1,310,736	$ 5,850	963,851	358,598	(10,569)	(6,994)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	(45,452)			20,588		(66,040)
Stock based compensation expense	1,419		1,419
Common stock transactions related to stock based employee benefit plans (in shares)		7
Common stock transactions related to stock based employee benefit plans	106	$ 1	(5)		110
Common stock issued for stock options (in shares)		178
Common stock issued for stock options	3,403	$ 18	3,385
Issuance of common stock, pursuant to acquisition (in shares)		2,550
Issuance of common stock, pursuant to acquisitions	90,234	$ 255	89,979
Conversion of options, pursuant to acquisitions	3,833		3,833
Dividends on common stock	(7,994)			(7,994)
Increase (decrease) in shares during period (in shares)		2,735
Increase (decrease) in stockholders' equity during period	45,549	$ 274	98,611	12,594	110	(66,040)
Ending balance (in shares) at Mar. 31, 2022		61,239
Ending balance at Mar. 31, 2022	$ 1,356,285	$ 6,124	$ 1,062,462	$ 371,192	$ (10,459)	$ (73,034)

CONSOLIDATED STATEMENTS OF SH_2

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical)	3 Months Ended
	Mar. 31, 2022$ / shares
Statement of Stockholders' Equity [Abstract]
Dividends on common stock (in dollars per share)	$ 0.13

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Basis of Presentation: The accompanying unaudited condensed consolidated financial statements of Seacoast Banking Corporation of Florida and its subsidiaries (the “Company”) have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Certain prior period amounts have been reclassified to conform to the current period presentation. Operating results for the three months ended March 31, 2022, are not necessarily indicative of the results that may be expected for the year ending December 31, 2022, or any other period. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. Use of Estimates: The preparation of these condensed consolidated financial statements requires management to make judgments in the application of certain accounting policies that involve significant estimates and assumptions. The Company has established policies and control procedures that are intended to ensure valuation methods are well controlled and applied consistently from period to period. These estimates and assumptions, which may materially affect the reported amounts of certain assets, liabilities, revenues and expenses, are based on information available as of the date of the financial statements, and changes in this information over time and the use of revised estimates and assumptions could materially affect amounts reported in subsequent financial statements. Specific areas, among others, requiring the application of management’s estimates include determination of the allowance for credit losses, acquisition accounting and purchased loans, intangible assets and impairment testing, other fair value measurements and contingent liabilities. Recently Issued Accounting Standards, Not Yet Adopted In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2022-02, Financial Instruments Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures . ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings (“TDRs”) in ASC 310-40, Receivables - Troubled Debt Restructurings by Creditors , and introduces new disclosures related to modifications with borrowers that are experiencing financial difficulties. ASU 2022-02 also requires the disclosure of current-period gross writeoffs by year of origination for financing receivables held at amortized cost. The amendments in ASU 2022-02 are effective for fiscal years beginning after December 15, 2022, and early adoption is permitted. The impact to the Company’s consolidated financial statements of the adoption of ASU 2022-02 is not expected to be material.

Earnings per Share

Earnings per Share	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share Basic earnings per common share is computed by dividing net income available to common shareholders by the weighted average number of shares of common stock outstanding during the period. For the three months ended March 31, 2022 and March 31, 2021, no options to purchase shares of the Company's common stock were anti-dilutive. Three Months Ended March 31, (Dollars in thousands, except per share data) 2022 2021 Basic earnings per share Net income $ 20,588 $ 33,719 Average common shares outstanding 61,127 55,271 Net income per share $ 0.34 $ 0.61 Diluted earnings per share Net income $ 20,588 $ 33,719 Average common shares outstanding 61,127 55,271 Add: Dilutive effect of employee restricted stock and stock options 577 721 Average diluted shares outstanding 61,704 55,992 Net income per share $ 0.33 $ 0.60 Net income has not been allocated to unvested restricted stock awards that are participating securities because the amounts that would be allocated are not material to net income per share of common stock. Unvested restricted stock awards that are participating securities represent less than one percent of all of the outstanding shares of common stock for each of the periods presented.

Securities

Securities	3 Months Ended
	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The amortized cost, gross unrealized gains and losses and fair value of securities available-for-sale and held-to-maturity at March 31, 2022 and December 31, 2021 are summarized as follows: March 31, 2022 (In thousands) Amortized Gross Gross Unrealized Fair Debt securities available-for-sale U.S. Treasury securities and obligations of U.S. government agencies $ 6,240 $ 54 $ (13) $ 6,281 Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 1,335,336 829 (91,495) 1,244,670 Private mortgage-backed securities and collateralized mortgage obligations 114,286 284 (3,274) 111,296 Collateralized loan obligations 315,168 — (2,044) 313,124 Obligations of state and political subdivisions 31,533 518 (803) 31,248 Totals $ 1,802,563 $ 1,685 $ (97,629) $ 1,706,619 Debt securities held-to-maturity Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities $ 747,004 $ 15,397 $ (52,909) $ 709,492 Totals $ 747,004 $ 15,397 $ (52,909) $ 709,492 December 31, 2021 (In thousands) Amortized Gross Unrealized Gross Unrealized Fair Debt securities available-for-sale U.S. Treasury securities and obligations of U.S. government agencies $ 6,466 $ 316 $ (3) $ 6,779 Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 1,234,721 8,308 (20,309) 1,222,720 Private mortgage-backed securities and collateralized mortgage obligations 88,096 1,091 (420) 88,767 Collateralized loan obligations 292,751 63 (124) 292,690 Obligations of state and political subdivisions 31,624 1,740 (1) 33,363 Totals $ 1,653,658 $ 11,518 $ (20,857) $ 1,644,319 Debt securities held-to-maturity Mortgage-backed securities of U.S. government-sponsored entities $ 638,640 $ 3,828 $ (15,070) $ 627,398 Totals $ 638,640 $ 3,828 $ (15,070) $ 627,398 During the three months ended March 31, 2022, securities with a fair value of $26.0 million obtained in the acquisition of Business Bank of Florida Corp. were immediately sold. No gain or loss was recognized on the sale. There were no other sales of securities during the three months ended March 31, 2022. There were no sales of securities for the three months ended March 31, 2021. Also included in “Securities losses, net” is a decrease of $0.5 million for the three months ended March 31, 2022, and a decrease of $0.1 million for the three months ended March 31, 2021, in the value of an investment in shares of a mutual fund that invests in CRA-qualified debt securities. During the three months ended March 31, 2021, the Company reclassified debt securities with an amortized cost of $210.8 million from available-for-sale to held-to-maturity, as it has the ability and intent to hold these securities to maturity. These securities had net unrealized gains of $0.8 million at the date of transfer, which will continue to be reported in accumulated other comprehensive income, and will be amortized over the remaining life of the securities as an adjustment of yield. The effect on interest income of the amortization of net unrealized gains is offset by the amortization of the premium on the securities transferred. At March 31, 2022, debt securities with a fair value of $446.7 million were pledged primarily as collateral for public deposits and secured borrowings. The amortized cost and fair value of securities at March 31, 2022, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because prepayments of the underlying collateral for these securities may occur, due to the right to call or repay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately. March 31, 2022 Held-to-Maturity Available-for-Sale (In thousands) Amortized Fair Amortized Fair Due in less than one year $ — $ — $ 2,776 $ 2,790 Due after one year through five years — — 14,493 14,807 Due after five years through ten years — — 5,705 5,698 Due after ten years — — 14,799 14,234 — — 37,773 37,529 Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 747,004 709,492 1,335,336 1,244,670 Private mortgage-backed securities and collateralized mortgage obligations — — 114,286 111,296 Collateralized loan obligations — — 315,168 313,124 Totals $ 747,004 $ 709,492 $ 1,802,563 $ 1,706,619 The estimated fair value of a security is determined based on market quotations when available or, if not available, by using quoted market prices for similar securities, pricing models or discounted cash flows analyses, or using observable market data. The tables below indicate the fair value of available-for-sale debt securities with unrealized losses for which no allowance for credit losses has been recorded. March 31, 2022 Less Than 12 Months 12 Months or Longer Total (In thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury securities and obligations of U.S. government agencies $ 303 $ (11) $ 229 $ (2) $ 532 $ (13) Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 1,089,150 (80,423) 100,982 (11,072) 1,190,132 (91,495) Private mortgage-backed securities and collateralized mortgage obligations 84,333 (3,109) 4,721 (165) 89,054 (3,274) Collateralized loan obligations 298,334 (1,928) 14,790 (116) 313,124 (2,044) Obligations of state and political subdivisions 9,255 (803) — — 9,255 (803) Totals $ 1,481,375 $ (86,274) $ 120,722 $ (11,355) $ 1,602,097 $ (97,629) December 31, 2021 Less Than 12 Months 12 Months or Longer Total (In thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury securities and obligations of U.S. government agencies $ 97 $ (1) $ 245 $ (2) $ 342 $ (3) Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 955,881 (19,575) 11,953 (734) 967,834 (20,309) Private mortgage-backed securities and collateralized mortgage obligations 33,640 (173) 9,628 (247) 43,268 (420) Collateralized loan obligations 123,202 (81) 9,461 (43) 132,663 (124) Obligations of state and political subdivisions 499 (1) — — 499 (1) Totals $ 1,113,319 $ (19,831) $ 31,287 $ (1,026) $ 1,144,606 $ (20,857) At March 31, 2022, the Company had unrealized losses of $91.5 million on mortgage-backed securities and collateralized mortgage obligations issued by government-sponsored entities having a fair value of $1.2 billion. These securities are either explicitly or implicitly guaranteed by the U.S. government and have a long history of no credit losses. The implied government guarantee of principal and interest payments and the high credit rating of the portfolio provide a sufficient basis for the current expectation that there is no risk of loss if default were to occur. Based on the assessment of all relevant factors, the Company believes that the unrealized loss positions on these debt securities are a function of changes in investment spreads and interest rate movements and not changes in credit quality, and expects to recover the entire amortized cost basis of these securities. Therefore, at March 31, 2022, no allowance for credit losses has been recorded. At March 31, 2022, the Company had $3.3 million of unrealized losses on private label residential and commercial mortgage-backed securities and collateralized mortgage obligations having a fair value of $89.1 million. The collateral underlying these mortgage investments is primarily residential real estate. The securities have average credit support of 24%. Based on the assessment of all relevant factors, the Company believes that the unrealized loss positions on these debt securities are a function of changes in investment spreads and interest rate movements and not changes in credit quality, and expects to recover the entire amortized cost basis of these securities. Therefore, at March 31, 2022, no allowance for credit losses has been recorded. At March 31, 2022, the Company had $2.0 million of unrealized losses in uncapped 3-month LIBOR floating rate collateralized loan obligations (“CLOs”) having a fair value of $313.1 million. CLOs are special purpose vehicles and those in which the Company has invested acquire nearly all first-lien, broadly syndicated corporate loans across a diversified band of industries while providing support to senior tranche investors. As of March 31, 2022, all positions held by the Company are in AAA and AA tranches, with average credit support of 37% and 25%, respectively. The Company evaluates the securities for potential credit losses by modeling expected loan-level defaults, recoveries, and prepayments for each CLO security. Based on the assessment of all relevant factors, the Company believes that the unrealized loss positions on these debt securities are a function of changes in investment spreads and interest rate movements and not changes in credit quality, and expects to recover the entire amortized cost basis of these securities. Therefore, at March 31, 2022, no allowance for credit losses has been recorded. All HTM debt securities are issued by government-sponsored entities, which are either explicitly or implicitly guaranteed by the U.S. government and have a long history of no credit losses. While the potential for default on these securities may be something greater than zero, the long history with no credit losses, the implied government guarantee of principal and interest payments and the high credit rating of the HTM portfolio provide sufficient basis for the current expectation that there is no risk of loss if default were to occur. As a result, as of March 31, 2022, no allowance for credit losses has been recorded. Included in Other Assets at March 31, 2022 is $38.1 million of Federal Home Loan Bank and Federal Reserve Bank stock stated at par value. The Company has not identified events or changes in circumstances, which may have a significant adverse effect on the fair value of these cost method investment securities. Accrued interest receivable on AFS and HTM debt securities of $3.4 million and $1.2 million, respectively, at March 31, 2022, and $3.4 million and $1.0 million, respectively, at December 31, 2021, is included in Other Assets. Also included in Other Assets is an $8.9 million investment in a CRA-qualified mutual fund carried at fair value.

Loans

Loans	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
Loans	Loans Loans held for investment are categorized into the following segments: • Construction and land development: Loans are extended to both commercial and consumer customers which are collateralized by and for the purpose of funding land development and construction projects, including 1-4 family residential construction, multi-family property and non-farm residential property where the primary source of repayment is from proceeds of the sale, refinancing or permanent financing of the property. • Commercial real estate - owner-occupied: Loans are extended to commercial customers for the purpose of acquiring real estate to be occupied by the borrower's business. These loans are collateralized by the subject property and the repayment of these loans is largely dependent on the performance of the company occupying the property. • Commercial real estate - non owner-occupied: Loans are extended to commercial customers for the purpose of acquiring commercial property where occupancy by the borrower is not their primary intent. These loans are viewed primarily as cash flow loans, collateralized by the subject property, and the repayment of these loans is largely dependent on rental income from the successful operation of the property. • Residential real estate: Loans are extended to consumer customers and collateralized primarily by 1-4 family residential properties and include fixed and variable rate mortgages, home equity mortgages, and home equity lines of credit. Loans are primarily written based on conventional loan agency guidelines, including loans that exceed agency value limitations. Sources of repayment may be from the occupant of the residential property or from cash flows on rental income from the successful operation of the property. • Commercial and financial: Loans are extended to commercial customers. The purpose of the loans can be working capital, physical asset expansion, asset acquisition or other business purposes. Loans may be collateralized by assets owned by the borrower or the borrower's business. Commercial loans are based primarily on the historical and projected cash flow of the borrower's business and secondarily on the capacity of credit enhancements, guarantees and underlying collateral provided by the borrower. • Consumer: Loans are extended to consumer customers. The segment includes both installment loans and lines of credit which may be collateralized or non-collateralized. • Paycheck Protection Program (“PPP”): Loans originated under a temporary program established by the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”), and extended by the Economic Aid Act. Under the terms of the program, balances may be forgiven if the borrower uses the funds in a manner consistent with the program guidelines, and repayment is guaranteed by the U.S. government. The following tables present net loan balances by segment as of: March 31, 2022 (In thousands) Portfolio Loans Acquired Non-PCD Loans PCD Loans Total Construction and land development $ 226,149 $ 33,231 $ 41 $ 259,421 Commercial real estate - owner-occupied 990,929 273,498 20,088 1,284,515 Commercial real estate - non owner-occupied 1,400,270 488,400 77,480 1,966,150 Residential real estate 1,379,911 214,401 5,333 1,599,645 Commercial and financial 1,007,064 110,161 15,281 1,132,506 Consumer 165,650 4,074 — 169,724 Paycheck Protection Program 29,137 10,119 — 39,256 Totals $ 5,199,110 $ 1,133,884 $ 118,223 $ 6,451,217 December 31, 2021 (In thousands) Portfolio Loans Acquired Non-PCD Loans PCD Loans Total Construction and land development $ 199,341 $ 31,438 $ 45 $ 230,824 Commercial real estate - owner occupied 983,517 186,812 27,445 1,197,774 Commercial real estate - non-owner occupied 1,278,180 382,554 75,705 1,736,439 Residential real estate 1,261,306 156,957 7,091 1,425,354 Commercial and financial 968,318 84,395 16,643 1,069,356 Consumer 169,507 4,658 10 174,175 Paycheck Protection Program 69,503 21,604 — 91,107 Totals $ 4,929,672 $ 868,418 $ 126,939 $ 5,925,029 The amortized cost basis of loans at March 31, 2022 included net deferred costs of $27.6 million on non-PPP portfolio loans and net deferred fees of $1.0 million on PPP loans. At December 31, 2021, the amortized cost basis included net deferred costs of $31.0 million on non-PPP portfolio loans and net deferred fees of $2.4 million on PPP loans. At March 31, 2022, the remaining fair value adjustments on acquired loans were $24.1 million, or 1.9% of the outstanding acquired loan balances, compared to $23.1 million, or 2.3% of the acquired loan balances at December 31, 2021. These amounts are accreted into interest income over the remaining lives of the related loans on a level yield basis. Accrued interest receivable is included within Other Assets and was $15.5 million and $14.7 million at March 31, 2022 and December 31, 2021, respectively. The following tables present the status of net loan balances as of March 31, 2022 and December 31, 2021. March 31, 2022 (In thousands) Current Accruing Accruing Accruing Nonaccrual Total Portfolio Loans Construction and land development $ 225,921 $ — $ — $ — $ 228 $ 226,149 Commercial real estate - owner-occupied 990,260 — — — 669 990,929 Commercial real estate - non owner-occupied 1,399,902 35 — — 333 1,400,270 Residential real estate 1,372,141 155 275 — 7,340 1,379,911 Commercial and financial 1,000,983 2,738 — 40 3,303 1,007,064 Consumer 164,430 638 458 — 124 165,650 Paycheck Protection Program 1 29,109 28 — — — 29,137 Total Portfolio Loans $ 5,182,746 $ 3,594 $ 733 $ 40 $ 11,997 $ 5,199,110 Acquired Non-PCD Loans Construction and land development $ 33,231 $ — $ — $ — $ — $ 33,231 Commercial real estate - owner-occupied 273,498 — — — — 273,498 Commercial real estate - non owner-occupied 487,175 — — — 1,225 488,400 Residential real estate 213,208 — — — 1,193 214,401 Commercial and financial 109,805 282 — — 74 110,161 Consumer 3,837 — — — 237 4,074 Paycheck Protection Program 1 10,119 — — — — 10,119 Total Acquired Non-PCD Loans $ 1,130,873 $ 282 $ — $ — $ 2,729 $ 1,133,884 PCD Loans Construction and land development $ 37 $ — $ — $ — $ 4 $ 41 Commercial real estate - owner-occupied 16,915 — — — 3,173 20,088 Commercial real estate - non owner-occupied 74,256 — — — 3,224 77,480 Residential real estate 4,624 — — — 709 5,333 Commercial and financial 10,908 — — — 4,373 15,281 Consumer — — — — — — Total PCD Loans $ 106,740 $ — $ — $ — $ 11,483 $ 118,223 Total Loans $ 6,420,359 $ 3,876 $ 733 $ 40 $ 26,209 $ 6,451,217 1 Paycheck Protection Program loans are not reflected as past due when forgiveness applications are being processed by the SBA. Repayment of principal and interest is fully guaranteed by the U.S. government. December 31, 2021 (In thousands) Current Accruing Accruing Accruing Nonaccrual Total Portfolio Loans Construction and land development $ 199,087 $ — $ — $ — $ 254 $ 199,341 Commercial real estate - owner occupied 982,804 — — — 713 983,517 Commercial real estate - non-owner occupied 1,276,582 — — — 1,598 1,278,180 Residential real estate 1,248,160 3,457 143 — 9,546 1,261,306 Commercial and financial 963,828 851 41 — 3,598 968,318 Consumer 168,791 565 23 15 113 169,507 Paycheck Protection Program 1 69,434 — — 69 — 69,503 Total Portfolio Loans $ 4,908,686 $ 4,873 $ 207 $ 84 $ 15,822 $ 4,929,672 Acquired Non-PCD Loans Construction and land development $ 31,438 $ — $ — $ — $ — $ 31,438 Commercial real estate - owner occupied 186,652 — 160 — — 186,812 Commercial real estate - non-owner occupied 381,510 — — — 1,044 382,554 Residential real estate 154,981 182 — — 1,794 156,957 Commercial and financial 84,180 — 40 — 175 84,395 Consumer 4,082 135 — — 441 4,658 Paycheck Protection Program 1 21,567 — — 37 — 21,604 Total Acquired Non-PCD Loans $ 864,410 $ 317 $ 200 $ 37 $ 3,454 $ 868,418 PCD Loans Construction and land development $ 40 $ — $ — $ — $ 5 $ 45 Commercial real estate - owner occupied 24,192 — — — 3,253 27,445 Commercial real estate - non-owner occupied 72,442 — — — 3,263 75,705 Residential real estate 5,386 — — — 1,705 7,091 Commercial and financial 13,547 — — — 3,096 16,643 Consumer 10 — — — — 10 Total PCD Loans $ 115,617 $ — $ — $ — $ 11,322 $ 126,939 Total Loans $ 5,888,713 $ 5,190 $ 407 $ 121 $ 30,598 $ 5,925,029 1 Paycheck Protection Program loans are not reflected as past due when forgiveness applications are being processed by the SBA. Repayment of principal and interest is fully guaranteed by the U.S. government. All interest accrued but not received for loans placed on nonaccrual is reversed against interest income. Interest subsequently received on such loans is accounted for under the cost-recovery method, whereby interest income is not recognized until the loan balance is reduced to zero. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current, and future payments are reasonably assured. The Company recognized $0.8 million and $0.2 million in interest income on nonaccrual loans during the three months ended March 31, 2022 and 2021, respectively. The following tables present net balances of loans on nonaccrual status and the related allowance for credit losses, if any, as of: March 31, 2022 (In thousands) Nonaccrual Loans With No Related Allowance Nonaccrual Loans With an Allowance Total Nonaccrual Loans Allowance for Credit Losses Construction and land development $ 12 $ 220 $ 232 $ 89 Commercial real estate - owner-occupied 2,871 971 3,842 380 Commercial real estate - non owner-occupied 3,406 1,376 4,782 18 Residential real estate 9,145 97 9,242 35 Commercial and financial 4,084 3,666 7,750 1,945 Consumer 23 338 361 329 Totals $ 19,541 $ 6,668 $ 26,209 $ 2,796 December 31, 2021 (In thousands) Nonaccrual Loans With No Related Allowance Nonaccrual Loans With an Allowance Total Nonaccrual Loans Allowance for Credit Losses Construction and land development $ 37 $ 222 $ 259 $ 92 Commercial real estate - owner-occupied 2,976 990 3,966 419 Commercial real estate - non owner-occupied 4,490 1,415 5,905 27 Residential real estate 12,358 687 13,045 357 Commercial and financial 2,676 4,193 6,869 2,384 Consumer 29 525 554 525 Totals $ 22,566 $ 8,032 $ 30,598 $ 3,804 Collateral-Dependent Loans Loans are considered collateral-dependent when the repayment, based on the Company's assessment as of the reporting date, is expected to be provided substantially through the operation or sale of the underlying collateral and there are no other available and reliable sources of repayment. The following table presents collateral-dependent loans as of: (In thousands) March 31, 2022 December 31, 2021 Construction and land development $ 248 $ 271 Commercial real estate - owner-occupied 4,581 4,706 Commercial real estate - non owner-occupied 3,619 4,923 Residential real estate 12,482 16,334 Commercial and financial 8,033 8,741 Consumer 478 741 Totals $ 29,441 $ 35,716 Loans by Risk Rating The Company utilizes an internal asset classification system as a means of identifying problem and potential problem loans. The following classifications are used to categorize loans under the internal classification system: • Pass: Loans that are not problem loans or potential problem loans are considered to be pass-rated. • Special Mention: Loans that do not currently expose the Company to sufficient risk to warrant classification in the Substandard or Doubtful categories, but possess weaknesses that deserve management's close attention are deemed to be Special Mention. • Substandard: Loans with the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. • Substandard Impaired: Loans typically placed on nonaccrual and considered to be collateral-dependent or accruing TDRs. • Doubtful: Loans that have all the weaknesses inherent in those classified Substandard with the added characteristic that the weakness present makes collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The principal balance of loans classified as doubtful are likely to be charged off. The following tables present the risk rating of loans by year of origination as of: March 31, 2022 (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Total Construction and Land Development Risk Ratings: Pass $ 15,252 $ 118,289 $ 22,227 $ 30,059 $ 16,221 $ 16,738 $ 40,387 $ 259,173 Special Mention — — — — — — — — Substandard — — — — — 7 — 7 Substandard Impaired — — — — 220 21 — 241 Doubtful — — — — — — — — Total $ 15,252 $ 118,289 $ 22,227 $ 30,059 $ 16,441 $ 16,766 $ 40,387 $ 259,421 Commercial real estate - owner-occupied Risk Ratings: Pass $ 57,482 $ 216,122 $ 161,838 $ 192,208 $ 128,139 $ 492,637 $ 11,429 $ 1,259,855 Special Mention — — 6,464 5,322 641 1,528 — 13,955 Substandard — — — — — 5,359 350 5,709 Substandard Impaired — — — 2,672 310 2,014 — 4,996 Doubtful — — — — — — — — Total $ 57,482 $ 216,122 $ 168,302 $ 200,202 $ 129,090 $ 501,538 $ 11,779 $ 1,284,515 Commercial real estate - non owner-occupied Risk Ratings: Pass $ 174,966 $ 415,704 $ 227,927 $ 305,852 $ 186,363 $ 578,279 $ 7,563 $ 1,896,654 Special Mention — — — 837 — 10,640 — 11,477 Substandard — — 4,753 5,351 23,146 19,242 — 52,492 Substandard Impaired — — 1,044 1,849 — 2,634 — 5,527 Doubtful — — — — — — — — Total $ 174,966 $ 415,704 $ 233,724 $ 313,889 $ 209,509 $ 610,795 $ 7,563 $ 1,966,150 Residential real estate Risk Ratings: Pass $ 14,211 $ 564,750 $ 120,963 $ 90,420 $ 110,413 $ 311,573 $ 370,928 $ 1,583,258 Special Mention — — — — 13 1,120 75 1,208 Substandard — — 338 — 55 1,480 201 2,074 Substandard Impaired — — 144 134 38 9,777 3,012 13,105 Doubtful — — — — — — — — Total $ 14,211 $ 564,750 $ 121,445 $ 90,554 $ 110,519 $ 323,950 $ 374,216 $ 1,599,645 March 31, 2022 (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Total Commercial and financial Risk Ratings: Pass $ 51,836 $ 351,023 $ 176,311 $ 90,587 $ 63,294 $ 89,736 $ 271,721 $ 1,094,508 Special Mention — 504 14,956 449 235 637 385 17,166 Substandard — — 212 2,466 2,104 3,365 273 8,420 Substandard Impaired — — 219 4,534 4,615 2,945 99 12,412 Doubtful — — — — — — — — Total $ 51,836 $ 351,527 $ 191,698 $ 98,036 $ 70,248 $ 96,683 $ 272,478 $ 1,132,506 Consumer Risk Ratings: Pass $ 9,049 $ 46,934 $ 28,939 $ 23,469 $ 15,271 $ 20,920 $ 21,607 $ 166,189 Special Mention — 7 43 100 38 437 1,748 2,373 Substandard — 437 — 8 — — 191 636 Substandard Impaired — 7 21 89 34 153 222 526 Doubtful — — — — — — — — Total $ 9,049 $ 47,385 $ 29,003 $ 23,666 $ 15,343 $ 21,510 $ 23,768 $ 169,724 Paycheck Protection Program Risk Ratings: Pass $ — $ 37,304 $ 1,952 $ — $ — $ — $ — $ 39,256 Total $ — $ 37,304 $ 1,952 $ — $ — $ — $ — $ 39,256 Consolidated Risk Ratings: Pass $ 322,796 $ 1,750,126 $ 740,157 $ 732,595 $ 519,701 $ 1,509,883 $ 723,635 $ 6,298,893 Special Mention — 511 21,463 6,708 927 14,362 2,208 46,179 Substandard — 437 5,303 7,825 25,305 29,453 1,015 69,338 Substandard Impaired — 7 1,428 9,278 5,217 17,544 3,333 36,807 Doubtful — — — — — — — — Total $ 322,796 $ 1,751,081 $ 768,351 $ 756,406 $ 551,150 $ 1,571,242 $ 730,191 $ 6,451,217 December 31, 2021 (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Total Construction and Land Development Risk Ratings: Pass $ 94,318 $ 23,860 $ 38,058 $ 25,507 $ 3,995 $ 15,466 $ 29,349 $ 230,553 Special Mention — — — — — — — — Substandard — — — — — — — — Substandard Impaired — — — 222 — 49 — 271 Doubtful — — — — — — — — Total $ 94,318 $ 23,860 $ 38,058 $ 25,729 $ 3,995 $ 15,515 $ 29,349 $ 230,824 Commercial real estate - owner-occupied Risk Ratings: Pass $ 205,404 $ 154,432 $ 179,786 $ 132,353 $ 125,763 $ 363,986 $ 10,005 $ 1,171,729 Special Mention — 6,527 5,370 649 218 3,250 — 16,014 Substandard — — — — 3,290 1,610 — 4,900 Substandard Impaired — — 2,742 310 596 1,483 — 5,131 Doubtful — — — — — — — — Total $ 205,404 $ 160,959 $ 187,898 $ 133,312 $ 129,867 $ 370,329 $ 10,005 $ 1,197,774 December 31, 2021 (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Total Commercial real estate - non owner-occupied Risk Ratings: Pass $ 395,308 $ 207,824 $ 298,021 $ 186,339 $ 110,990 $ 460,435 $ 6,477 $ 1,665,394 Special Mention — — 844 — 289 13,850 — 14,983 Substandard — 4,776 3,009 23,206 1,900 17,266 — 50,157 Substandard Impaired — 1,044 1,849 — 326 2,686 — 5,905 Doubtful — — — — — — — — Total $ 395,308 $ 213,644 $ 303,723 $ 209,545 $ 113,505 $ 494,237 $ 6,477 $ 1,736,439 Residential real estate Risk Ratings: Pass $ 394,547 $ 114,364 $ 90,566 $ 119,836 $ 118,556 $ 213,950 $ 354,439 $ 1,406,258 Special Mention — — — 70 — 1,243 532 1,845 Substandard — 340 — — 58 422 86 906 Substandard Impaired — 149 724 39 4,415 8,507 2,511 16,345 Doubtful — — — — — — — — Total $ 394,547 $ 114,853 $ 91,290 $ 119,945 $ 123,029 $ 224,122 $ 357,568 $ 1,425,354 Commercial and financial Risk Ratings: Pass $ 340,826 $ 180,677 $ 97,072 $ 68,232 $ 39,331 $ 56,053 $ 246,568 $ 1,028,759 Special Mention 530 15,587 — 237 251 84 876 17,565 Substandard — 371 2,605 3,594 1,436 3,217 339 11,562 Substandard Impaired — 196 4,561 3,694 1,371 1,520 128 11,470 Doubtful — — — — — — — — Total $ 341,356 $ 196,831 $ 104,238 $ 75,757 $ 42,389 $ 60,874 $ 247,911 $ 1,069,356 Consumer Risk Ratings: Pass $ 45,063 $ 31,342 $ 26,194 $ 17,300 $ 9,979 $ 16,019 $ 25,418 $ 171,315 Special Mention — 24 431 37 167 3 1,199 1,861 Substandard — — 18 — 17 — 223 258 Substandard Impaired — — 92 23 74 118 434 741 Doubtful — — — — — — — — Total $ 45,063 $ 31,366 $ 26,735 $ 17,360 $ 10,237 $ 16,140 $ 27,274 $ 174,175 Paycheck Protection Program Risk Ratings: Pass $ 87,036 $ 4,071 $ — $ — $ — $ — $ — $ 91,107 Total $ 87,036 $ 4,071 $ — $ — $ — $ — $ — $ 91,107 Consolidated Risk Ratings: Pass $ 1,562,502 $ 716,570 $ 729,697 $ 549,567 $ 408,614 $ 1,125,909 $ 672,256 $ 5,765,115 Special Mention 530 22,138 6,645 993 925 18,430 2,607 52,268 Substandard — 5,487 5,632 26,800 6,701 22,515 648 67,783 Substandard Impaired — 1,389 9,968 4,288 6,782 14,363 3,073 39,863 Doubtful — — — — — — — — Total $ 1,563,032 $ 745,584 $ 751,942 $ 581,648 $ 423,022 $ 1,181,217 $ 678,584 $ 5,925,029 Troubled Debt Restructured Loans The Company’s TDR concessions granted to certain borrowers generally do not include forgiveness of principal balances, but may include interest rate reductions, an extension of the amortization period and/or converting the loan to interest only for a limited period of time. Loan modifications are not reported in calendar years after modification if the loans were modified at an interest rate equal to the yields of new loan originations with comparable risk and the loans are performing based on the terms of the restructuring agreements. The following table presents loans that were modified in a troubled debt restructuring during the three months ended March 31, 2022 and March 31, 2021: Three Months Ended March 31, 2022 2021 (In thousands) Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Construction and land development — $ — $ — — $ — $ — Commercial real estate - owner-occupied — — — — — — Commercial real estate - non owner-occupied — — — — — — Residential real estate 3 785 785 1 27 27 Commercial and financial 1 33 33 — — — Consumer 4 22 22 — — — Totals 8 $ 840 $ 840 1 $ 27 $ 27 The TDRs described above resulted in a specific allowance for credit losses of $0.2 million as of March 31, 2022 and March 31, 2021. During the three months ended March 31, 2022, there was one default totaling $33 thousand on a loan that had been modified to a TDR within the preceding twelve months. During the three months ended March 31, 2021, there were no defaults on loans that had been modified to a TDR within the preceding twelve months. The Company considers a loan to have defaulted when it becomes 90 days or more delinquent under the modified terms, has been transferred to nonaccrual status, is charged off or has been transferred to other real estate owned. For loans measured based on the present value of expected future cash flows, $5,000 for each of the three months ended March 31, 2022, and 2021 was included in interest income and represents the change in present value attributable to the passage of time.

Allowance for Credit Losses

Allowance for Credit Losses	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
Allowance for Credit Losses	Allowance for Credit Losses Activity in the allowance for credit losses is summarized as follows: Three Months Ended March 31, 2022 (In thousands) Beginning Initial Allowance on PCD Loans Acquired During the Period Provision Charge- Recoveries TDR Ending Construction and land development $ 2,751 $ — $ (493) $ — $ 10 $ — $ 2,268 Commercial real estate - owner-occupied 8,579 — 715 — — — 9,294 Commercial real estate - non owner-occupied 36,617 31 7,274 — — — 43,922 Residential real estate 12,811 17 1,060 (1) 191 (3) 14,075 Commercial and financial 19,744 3 (1,628) (569) 177 — 17,727 Consumer 2,813 — (372) (95) 208 (2) 2,552 Paycheck Protection Program — — — — — — — Totals $ 83,315 $ 51 $ 6,556 $ (665) $ 586 $ (5) $ 89,838 Three Months Ended March 31, 2021 (In thousands) Beginning Provision Charge- Recoveries TDR Ending Construction and land development $ 4,920 $ (510) $ — $ 18 $ — $ 4,428 Commercial real estate - owner occupied 9,868 (76) — — — 9,792 Commercial real estate - non-owner occupied 38,266 (2,038) — 1 — 36,229 Residential real estate 17,500 (3,372) — 229 (4) 14,353 Commercial and financial 18,690 775 (756) 207 — 18,916 Consumer 3,489 (494) (185) 116 (1) 2,925 Paycheck Protection Program — — — — — — Totals $ 92,733 $ (5,715) $ (941) $ 571 $ (5) $ 86,643 Management establishes the allowance using relevant available information from both internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts to project losses over a three-year forecast period. Forecast data is sourced primarily from Moody’s Analytics (“Moody’s”), a firm widely recognized for its research, analysis, and economic forecasts. For portfolio segments with a weighted average life longer than three years, the Company reverts to longer-term historical loss experience to estimate losses over the remaining life of the loans within each segment. Historical credit losses provide the basis for the estimation of expected credit losses. Adjustments to historical loss information are made for differences in current loan-specific risk characteristics such as differences in underwriting standards, portfolio mix, delinquency level, loan to value ratios, borrower credit characteristics, loan seasoning or term as well as for changes in current and forecasted environmental conditions, such as changes in unemployment rates, property values, occupancy rates, and other macroeconomic metrics. As of March 31, 2022, the Company utilized Moody’s most recent “U.S. Macroeconomic Outlook Baseline” scenario and considered the uncertainty associated with the assumptions in the Baseline scenario, including actions taken by the Federal Reserve with regard to monetary policy and interest rates and the potential impact of those actions, the Russian invasion of Ukraine and the magnitude of the resulting market disruption, and the potential impact of persistent high inflation on economic growth. Outcomes in any or all of these factors could differ from the Baseline scenario, and the Company incorporated qualitative considerations reflecting the risk of uncertain economic conditions, and for additional dimensions of risk not captured in the quantitative model. The following section discusses changes in the level of reserves for the three months ended March 31, 2022. In the Construction and Land Development segment, the decrease in reserves reflects continuing low historical loss rates for this segment and improved economic variables relating to residential real estate. In this segment, the primary source of repayment is typically from proceeds of the sale, refinancing, or permanent financing of the underlying property; therefore, industry and collateral type and estimated collateral values are among the relevant factors in assessing expected losses. In the Commercial Real Estate - Owner-Occupied segment, increases in the allowance correspond with the increase in loan balances during the quarter. Risk characteristics include but are not limited to, collateral type, loan seasoning, and lien position. In the Commercial Real Estate - Non Owner-Occupied segment, the increase in reserves reflects the increase in loan balances and changes in economic forecast variables including unemployment. Repayment is often dependent upon rental income from the successful operation of the underlying property. Loan performance may be adversely affected by general economic conditions or conditions specific to the real estate market, including property types. Collateral type, loan seasoning, and lien position are among the risk characteristics analyzed for this segment. The Residential Real Estate segment includes first mortgages secured by residential property, and home equity lines of credit. The increase in reserves reflects the impact of higher loan balances. Risk characteristics considered for this segment include, but are not limited to, collateral type, lien position, loan to value ratios, and loan seasoning. In the Commercial and Financial segment, borrowers are primarily small to medium sized professional firms and other businesses, and loans are generally supported by projected cash flows of the business, collateralized by business assets, and/or guaranteed by the business owners. The decrease in reserves is attributed to improved economic forecast variables including business profitability. Industry, collateral type, estimated collateral values and loan seasoning are among the relevant factors in assessing expected losses. Consumer loans include installment and revolving lines, loans for automobiles, boats, and other personal or family purposes. Risk characteristics considered for this segment include, but are not limited to, collateral type, loan to value ratios, loan seasoning and FICO score. The decline in the reserve reflects lower loan balances and improved economic forecast variables. Balances outstanding under the Paycheck Protection Program are guaranteed by the U.S. government and have not been assigned a reserve. The allowance for credit losses is composed of specific allowances for loans individually evaluated and general allowances for loans grouped into loan pools based on similar characteristics, which are collectively evaluated. The Company’s loan portfolio and related allowance at March 31, 2022 and December 31, 2021 is shown in the following tables: March 31, 2022 Individually Evaluated Collectively Evaluated Total (In thousands) Recorded Associated Recorded Associated Recorded Associated Construction and land development $ 248 $ 89 $ 259,173 $ 2,179 $ 259,421 $ 2,268 Commercial real estate - owner occupied 4,996 380 1,279,519 8,914 1,284,515 9,294 Commercial real estate - non owner-occupied 5,527 787 1,960,623 43,135 1,966,150 43,922 Residential real estate 13,154 312 1,586,491 13,763 1,599,645 14,075 Commercial and financial 13,172 2,511 1,119,334 15,216 1,132,506 17,727 Consumer 540 481 169,184 2,071 169,724 2,552 Paycheck Protection Program — — 39,256 — 39,256 — Totals $ 37,637 $ 4,560 $ 6,413,580 $ 85,278 $ 6,451,217 $ 89,838 December 31, 2021 Individually Evaluated Collectively Evaluated Total (In thousands) Recorded Associated Recorded Associated Recorded Associated Construction and land development $ 271 $ 92 $ 230,553 $ 2,659 $ 230,824 $ 2,751 Commercial real estate - owner occupied 5,131 419 1,192,643 8,160 1,197,774 8,579 Commercial real estate - non owner-occupied 5,905 27 1,730,534 36,590 1,736,439 36,617 Residential real estate 16,345 646 1,409,009 12,165 1,425,354 12,811 Commercial and financial 11,470 2,885 1,057,886 16,859 1,069,356 19,744 Consumer 741 685 173,434 2,128 174,175 2,813 Paycheck Protection Program — — 91,107 — 91,107 — Totals $ 39,863 $ 4,754 $ 5,885,166 $ 78,561 $ 5,925,029 $ 83,315

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives Back-to-Back Swaps The Company offers interest rate swaps when requested by customers to allow them to hedge the risk of rising interest rates on their variable rate loans. Upon entering into these swaps, the Company enters into offsetting positions with counterparties in order to minimize the interest rate risk. These back-to-back swaps qualify as freestanding financial derivatives with the fair values reported in other assets and other liabilities. The Company is party to master netting arrangements with its financial institution counterparties; however, the Company does not offset assets and liabilities under the arrangements for financial statement presentation purposes. Gains and losses on these back-to-back swaps, which offset, are recorded through noninterest income. No net gains or losses have been recognized to date on these instruments. As of March 31, 2022, the interest rate swaps had an aggregate notional value of $209.9 million, with a fair value of $8.9 million recorded in other assets and other liabilities. As of December 31, 2021, the interest rate swaps had an aggregate notional value of $175.4 million, with a fair value of $8.0 million recorded in other assets and other liabilities. The weighted average maturity was 6.5 years at March 31, 2022 and 6.7 years at December 31, 2021. Interest Rate Floors Designated as Cash Flow Hedges The Company has entered into interest rate floor contracts to mitigate exposure to the variability of future cash flows due to changes in interest rates on certain segments of its variable-rate loans. During 2020, the Company entered into two interest rate floor contracts, each with a notional amount of $150.0 million, maturing in October 2023 and November 2023. The Company considers these derivatives to be highly effective at achieving offsetting changes in cash flows attributable to changes in interest rates and has designated them as cash flow hedges. Therefore, changes in the fair value of these derivative instruments are recognized in other comprehensive income. Amortization of the premium paid on cash flow hedges is recognized in earnings over the term of the hedge in the same caption as the hedged item. For the three months ended March 31, 2022, the Company recognized a loss through other comprehensive income of $0.2 million, and reclassified $0.1 million, out of accumulated other comprehensive income and into interest income. As of March 31, 2022 and December 31, 2021, the interest rate floors had a fair value of $0.1 million and $0.3 million, respectively, recorded in other assets in the consolidated balance sheet. Over the next twelve months the Company expects to reclassify $0.4 million from accumulated other comprehensive income into interest income related to these agreements. (In thousands) Notional Amount Fair Value Balance Sheet Category At March 31, 2022 Back-to-back swaps $ 209,904 $ 8,923 Other Assets and Other Liabilities Interest rate floors 300,000 122 Other Assets At December 31, 2021 Back-to-back swaps $ 175,392 $ 8,022 Other Assets and Other Liabilities Interest rate floors 300,000 290 Other Assets

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	3 Months Ended
	Mar. 31, 2022
Brokers and Dealers [Abstract]
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase Securities sold under agreements to repurchase are accounted for as secured borrowings. For securities sold under agreements to repurchase, the Company is required to pledge collateral with value sufficient to fully collateralize borrowings. Company securities pledged were as follows by collateral type and maturity as of: (In thousands) March 31, 2022 December 31, 2021 Fair value of pledged securities - overnight and continuous: Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities $ 152,817 $ 134,577

Equity Capital

Equity Capital	3 Months Ended
	Mar. 31, 2022
Equity [Abstract]
Equity Capital	Equity CapitalThe Company is well capitalized and at March 31, 2022, the Company and the Company’s principal banking subsidiary, Seacoast Bank, exceeded the common equity Tier 1 (CET1) capital ratio regulatory threshold of 6.5% for well-capitalized institutions under the Basel III standardized transition approach, as well as risk-based and leverage ratio requirements for well capitalized banks under the regulatory framework for prompt corrective action.

Contingent Liabilities

Contingent Liabilities	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities	Contingent LiabilitiesThe Company and its subsidiaries, because of the nature of their business, are at all times subject to numerous legal actions, threatened or filed. Management presently believes that none of the legal proceedings to which it is a party are likely to have a materially adverse effect on the Company’s consolidated financial condition, operating results or cash flows.

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Under ASC Topic 820, fair value measurements for items measured at fair value on a recurring and nonrecurring basis at March 31, 2022 and December 31, 2021 included: (In thousands) Fair Value Quoted Prices Significant Significant At March 31, 2022 Financial Assets Available-for-sale debt securities 1 $ 1,706,619 $ 191 $ 1,706,428 $ — Derivative financial instruments 2 9,045 — 9,045 — Loans held for sale 2 20,615 — 20,615 — Loans 3 8,395 — 1,517 6,878 Other real estate owned 4 11,567 — 2,420 9,147 Equity securities 5 8,864 8,864 — — Financial Liabilities Derivative financial instruments 2 $ 8,923 $ — $ 8,923 $ — At December 31, 2021 Financial Assets Available-for-sale debt securities 1 $ 1,644,319 $ 197 $ 1,644,122 $ — Derivative financial instruments 2 8,312 — 8,312 — Loans held for sale 2 31,791 — 31,791 — Loans 3 8,443 — 1,558 6,885 Other real estate owned 4 13,618 — — 13,618 Equity securities 5 9,316 9,316 — — Financial Liabilities Derivative financial instruments 2 $ 8,022 $ — $ 8,022 $ — 1 See “ Note 3 – Securities ” for further detail of fair value of individual investment categories. 2 Recurring fair value basis determined using observable market data. 3 S e e “ Note 4 – Loans .” N onrecurring fair value adjustments to collateral-dependent loans reflect full or partial write-downs that are based on current appraised values of the collateral in accordance with ASC Topic 310. 4 Fair value is measured on a nonrecurring basis in accordance with ASC Topic 360. 5 An investment in shares of a mutual fund that invests primarily in CRA-qualified debt securities, reported at fair value in Other Assets. Recurring fair value basis is determined using market quotations. Available-for-sale debt securities : Level 1 securities consist of U.S. Treasury securities. Other securities are reported at fair value utilizing Level 2 inputs. The estimated fair value of a security is determined based on market quotations when available or, if not available, by using quoted market prices for similar securities, pricing models or discounted cash flow analyses, using observable market data where available. The Company reviews the prices supplied by independent pricing services, as well as their underlying pricing methodologies, for reasonableness and to ensure such prices are aligned with traditional pricing matrices. The fair value of collateralized loan obligations is determined from broker quotes. From time to time, the Company will validate, on a sample basis, prices supplied by the independent pricing service by comparison to prices obtained from other brokers and third-party sources or derived using internal models. Derivative financial instruments : The Company offers interest rate swaps to certain loan customers to allow them to hedge the risk of rising interest rates on their variable rate loans. The Company originates a variable rate loan and enters into a variable-to-fixed interest rate swap with the customer. The Company also enters into an offsetting swap with a correspondent bank. These back-to-back agreements are intended to offset each other and allow the Company to originate a variable rate loan, while providing a contract for fixed interest payments for the customer. The fair value of these derivatives is based on a discounted cash flow approach. Due to the observable nature of the inputs used in deriving the fair value of these derivative contracts, the valuation of interest rate swaps is classified as Level 2. Other derivatives consist of interest rate floors designated as cash flow hedges. The fair values of these instruments are based upon the estimated amount the Company would receive or pay to terminate the instruments, taking into account current interest rates and, when appropriate, the current creditworthiness of the counterparties. Interest rate floors designated as cash flow hedges are classified within Level 2. Loans held for sale : Fair values are based upon estimated values to be received from independent third party purchasers. These loans are intended for sale and the Company believes that the fair value is the best indicator of the resolution of these loans. Fair market value changes occur due to changes in interest rates, the borrower’s credit, the secondary loan market and the market for a borrower’s debt. Interest income is recorded based on the contractual terms of the loan and in accordance with the Company’s policy on loans held for investment. None of the loans were 90 days or more past due or on nonaccrual as of March 31, 2022 and December 31, 2021. The aggregate fair value and contractual balance of loans held for sale as of March 31, 2022 and December 31, 2021 is as follows: (In thousands) March 31, 2022 December 31, 2021 Aggregate fair value $ 20,615 $ 31,791 Contractual balance 20,087 30,963 Excess 528 828 Loans : Loans carried at fair value consist of collateral-dependent real estate loans. Fair value is based on recent real estate appraisals less estimated costs of sale. These evaluations may use either a single valuation approach or a combination of approaches, such as comparative sales, cost and/or income approach. A significant unobservable input in the income approach is the estimated capitalization rate for a given piece of collateral. At March 31, 2022 capitalization rates utilized to determine fair value of the underlying collateral averaged approximately 7.0%. Adjustments to comparable sales may be made by an appraiser to reflect local market conditions or other economic factors and may result in changes in the fair value of an asset over time. As such, the fair value of these loans is considered level 3 in the fair value hierarchy. Collateral-dependent loans measured at fair value totaled $12.7 million with a specific reserve of $4.3 million at March 31, 2022, compared to $13.1 million with a specific reserve of $4.7 million at December 31, 2021. Other real estate owned : When appraisals are used to determine fair value and the appraisals are based on a market approach, the fair value of other real estate owned (“OREO”) is classified as a Level 2 input. When the fair value of OREO is based on appraisals which require significant adjustments to market-based valuation inputs or apply an income approach based on unobservable cash flows, the fair value of OREO is classified as Level 3. Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which generally coincides with the Company’s monthly and/or quarterly valuation process. During the three months ended March 31, 2022, an updated appraisal was obtained on a former branch property, and the value was transferred from Level 3 to Level 2. There were no transfers during the three months ended March 31, 2021. The carrying amount and fair value of the Company’s other financial instruments that were not disclosed previously in the balance sheet and for which carrying amount is not fair value as of March 31, 2022 and December 31, 2021 is as follows: (In thousands) Carrying Amount Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2022 Financial Assets Debt securities held-to-maturity 1 $ 747,004 $ — $ 709,492 $ — Time deposits with other banks 5,975 — 5,933 — Loans, net 6,352,984 — — 6,423,158 Financial Liabilities Deposit liabilities 9,243,768 — — 9,238,260 Subordinated debt 71,716 — 69,416 — December 31, 2021 Financial Assets Debt securities held-to-maturity 1 $ 638,640 $ — $ 627,398 $ — Loans, net 5,833,271 — — 5,907,447 Financial Liabilities Deposit liabilities 8,067,589 — — 8,067,995 Subordinated debt 71,646 — 69,348 — 1 See “ Note 3 – Securities ” for further detail of individual investment categories. The short maturity of Seacoast’s assets and liabilities results in having a significant number of financial instruments whose fair value equals or closely approximates carrying value. Such financial instruments are reported in the following balance sheet captions: cash and due from banks, interest bearing deposits with other banks, FHLB borrowings and securities sold under agreements to repurchase, maturing within 30 days. The following methods and assumptions were used to estimate the fair value of each class of financial instrument for which it is practicable to estimate that value at March 31, 2022 and December 31, 2021: Held-to-maturity debt securities : These debt securities are reported at fair value utilizing level 2 inputs. The estimated fair value of a security is determined based on market quotations when available or, if not available, by using quoted market prices for similar securities, pricing models or discounted cash flow analyses, using observable market data where available. The Company reviews the prices supplied by independent pricing services, as well as their underlying pricing methodologies, for reasonableness and to ensure such prices are aligned with traditional pricing matrices. From time to time, the Company will validate, on a sample basis, prices supplied by the independent pricing service by comparison to prices obtained from other brokers and third-party sources or derived using internal models. Loans : Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type, such as commercial or mortgage. Each loan category is further segmented into fixed and adjustable-rate interest terms as well as performing and nonperforming categories. The fair value of loans is calculated by discounting scheduled cash flows through the estimated life including prepayment considerations, using estimated market discount rates that reflect the risks inherent in the loan. The fair value approach considers market-driven variables including credit related factors and reflects an “exit price” as defined in ASC Topic 820. Deposit liabilities : The fair value of demand deposits, savings accounts and money market deposits is the amount payable at the reporting date. The fair value of fixed maturity certificates of deposit is estimated using the rates currently offered for funding of similar remaining maturities.

Business Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Business Combinations	Business Combinations Acquisition of Business Bank of Florida, Corp. On January 3, 2022, the Company completed its acquisition of Business Bank of Florida, Corp., (“BBFC”). Simultaneously, upon completion of the merger of BBFC and the Company, BBFC’s wholly owned subsidiary bank, Florida Business Bank, was merged with and into Seacoast Bank. Prior to the acquisition, Florida Business Bank operated one branch in Melbourne, Florida. As a result of this acquisition, the Company expects to expand its customer base and leverage operating cost through economies of scale, and positively affect the Company’s operating results. The Company acquired 100% of the outstanding common stock of BBFC. Under the terms of the definitive agreement, each share of BBFC common stock was converted into the right to receive 0.7997 of a share of Seacoast common stock. (In thousands, except per share data) January 3, 2022 Number of BBFC common shares outstanding 1,112 Per share exchange ratio 0.7997 Number of shares of common stock issued 889 Multiplied by common stock price per share on January 3, 2022 $ 35.39 Value of common stock issued 31,480 Fair value of options converted 497 Total purchase price $ 31,977 The acquisition of BBFC was accounted for under the acquisition method in accordance with ASC Topic 805, Business Combinations . The Company recognized goodwill of $8.0 million for this acquisition that is nondeductible for tax purposes. Determining fair values of assets and liabilities, especially the loan portfolio, core deposit intangibles, and deferred taxes, is a complicated process involving significant judgment regarding methods and assumptions used to calculate estimated fair values. The fair values initially assigned to assets acquired and liabilities assumed are preliminary and could change for up to one year after the closing date of the acquisition as new information and circumstances relative to closing date fair values becomes known. As part of the BBFC acquisition, 52,432 options were granted to replace outstanding BBFC options. These options had a weighted average exercise price of $26.63 and were fully vested upon acquisition. In accordance with ASC Topic 805, Business Combinations , the value of the replacement awards associated with pre-combination service, $0.5 million, was considered purchase consideration. (In thousands) Initially Measured Assets: Cash $ 38,332 Investment securities 26,011 Loans 121,774 Bank premises and equipment 2,102 Core deposit intangibles 2,621 Goodwill 7,962 Total assets $ 198,802 Liabilities: Deposits 166,326 Other liabilities 499 Total liabilities $ 166,825 The table below presents information with respect to the fair value and unpaid principal balance of acquired loans at the acquisition date. January 3, 2022 (In thousands) Book Balance Fair Value Loans: Construction and land development $ 8,677 $ 8,414 Commercial real estate - owner-occupied 45,403 44,564 Commercial real estate - non owner-occupied 53,065 52,034 Residential real estate 5,377 5,421 Commercial and financial 9,376 9,321 Consumer 59 61 PPP loans 1,959 1,959 Total acquired loans $ 123,916 $ 121,774 The table below presents the carrying amount of loans for which, at the date of acquisition, there was evidence of more than insignificant deterioration of credit quality since origination: (In thousands) January 3, 2022 Book balance of loans at acquisition $ 714 Allowance for credit losses at acquisition (15) Non-credit related discount (48) Total PCD loans acquired $ 651 The acquisition of BBFC resulted in the addition of $1.8 million in allowance for credit losses, including the $15 thousand identified in the table above for PCD loans, and $1.8 million for non-PCD loans recorded through the provision for credit losses at the date of acquisition. The Company believes the deposits assumed in the acquisition have an intangible value. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships. Acquisition of Sabal Palm Bancorp, Inc. On January 3, 2022, the Company completed its acquisition of Sabal Palm Bancorp, Inc. (“Sabal Palm”). Simultaneously, upon completion of the merger of Sabal Palm and the Company, Sabal Palm’s wholly owned subsidiary bank, Sabal Palm Bank, was merged with and into Seacoast Bank. Prior to the acquisition, Sabal Palm Bank operated three branches in the Sarasota area. As a result of this acquisition, the Company expects to expand its customer base and leverage operating cost through economies of scale, and positively affect the Company’s operating results. The Company acquired 100% of the outstanding common stock of Sabal Palm. Under the terms of the definitive agreement, each share of Sabal Palm common stock was converted into the right to receive 0.2203 of a share of Seacoast common stock. (In thousands, except per share data) January 3, 2022 Number of Sabal Palm common shares outstanding 7,536 Per share exchange ratio 0.2203 Number of shares of common stock issued 1,660 Multiplied by common stock price per share on January 3, 2022 $ 35.39 Value of common stock issued 58,762 Fair value of options converted 3,336 Total purchase price $ 62,098 The acquisition of Sabal Palm was accounted for under the acquisition method in accordance with ASC Topic 805, Business Combinations . The Company recognized goodwill of $26.5 million for this acquisition that is nondeductible for tax purposes. Determining fair values of assets and liabilities, especially the loan portfolio, core deposit intangibles, and deferred taxes, is a complicated process involving significant judgment regarding methods and assumptions used to calculate estimated fair values. The fair values initially assigned to assets acquired and liabilities assumed are preliminary and could change for up to one year after the closing date of the acquisition as new information and circumstances relative to closing date fair values becomes known. As part of the Sabal Palm acquisition, 188,253 options were granted to replace outstanding Sabal Palm options. These options had a weighted average exercise price of $17.84 and were fully vested upon acquisition. In accordance with ASC Topic 805, Business Combinations , the value of the replacement awards associated with pre-combination service, $3.3 million, was considered purchase consideration. (In thousands) Initially Measured Assets: Cash $ 170,609 Time deposits with other banks 6,473 Loans 246,152 Bank premises and equipment 1,745 Core deposit intangibles 5,587 Goodwill 26,489 Other assets 5,189 Total assets $ 462,244 Liabilities: Deposits 395,952 Other liabilities 4,194 Total liabilities $ 400,146 The table below presents information with respect to the fair value and unpaid principal balance of acquired loans at the acquisition date. January 3, 2022 (In thousands) Book Balance Fair Value Loans: Construction and land development $ 9,256 $ 9,009 Commercial real estate - owner-occupied 57,690 56,591 Commercial real estate - non owner-occupied 89,153 87,280 Residential real estate 71,469 72,227 Commercial and financial 17,797 17,501 Consumer 233 232 PPP loans 3,312 3,312 Total acquired loans $ 248,910 $ 246,152 The table below presents the carrying amount of loans for which, at the date of acquisition, there was evidence of more than insignificant deterioration of credit quality since origination: (In thousands) January 3, 2022 Book balance of loans at acquisition $ 3,703 Allowance for credit losses at acquisition (37) Non-credit related discount (663) Total PCD loans acquired $ 3,003 The acquisition of Sabal Palm resulted in the addition of $3.4 million in allowance for credit losses, including the $37 thousand identified in the table above for PCD loans, and $3.4 million for non-PCD loans recorded through the provision for credit losses at the date of acquisition. The Company believes the deposits assumed in the acquisition have an intangible value. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships. Acquisition of Legacy Bank of Florida On August 6, 2021, the Company completed its acquisition of Legacy Bank of Florida (“Legacy Bank”). Prior to the acquisition, Legacy Bank operated five branches in Broward and Palm Beach counties. As a result of this acquisition, the Company expects to expand its customer base and leverage operating cost through economies of scale, and positively affect the Company’s operating results. The Company acquired 100% of the outstanding common stock of Legacy Bank. Under the terms of the definitive agreement, each share of Legacy Bank common stock was converted into the right to receive 0.1703 of a share of Seacoast common stock. (In thousands, except per share data) August 6, 2021 Number of Legacy Bank common shares outstanding 15,778 Per share exchange ratio 0.1703 Number of shares of common stock issued 2,687 Multiplied by common stock price per share on August 6, 2021 $ 32.19 Value of common stock issued 86,487 Cash paid for fractional shares 7 Fair value of options converted 4,736 Total purchase price $ 91,230 The acquisition of Legacy Bank was accounted for under the acquisition method in accordance with ASC Topic 805, Business Combinations . The Company recognized goodwill of $31.0 million for this acquisition that is nondeductible for tax purposes. Determining fair values of assets and liabilities, especially the loan portfolio, core deposit intangibles, and deferred taxes, is a complicated process involving significant judgment regarding methods and assumptions used to calculate estimated fair values. The fair values initially assigned to assets acquired and liabilities assumed are preliminary and could change for up to one year after the closing date of the acquisition as new information and circumstances relative to closing date fair values becomes known. As part of the Legacy Bank acquisition, 356,497 options were granted to replace outstanding Legacy Bank options. These options had a weighted average exercise price of $16.70 and were fully vested upon acquisition. In accordance with ASC Topic 805, Business Combinations , the value of the replacement awards associated with pre-combination service, $4.7 million, was considered purchase consideration, and the value of the replacement awards associated with post-combination service, $0.9 million, was recognized as compensation expense in 2021. (In thousands) Initially Measured Assets: Cash $ 98,107 Investment securities 992 Loans 477,215 Bank premises and equipment 2,577 Core deposit intangibles 3,454 Goodwill 30,978 Other assets 15,532 Total assets $ 628,855 Liabilities: Deposits 494,921 Other liabilities 42,705 Total liabilities $ 537,626 The table below presents information with respect to the fair value and unpaid principal balance of acquired loans at the acquisition date. August 6, 2021 (In thousands) Book Balance Fair Value Loans: Construction and land development $ 37,558 $ 36,651 Commercial real estate - owner-occupied 35,765 35,363 Commercial real estate - non owner-occupied 241,322 237,091 Residential real estate 71,118 70,541 Commercial and financial 61,274 58,324 Consumer 647 647 PPP loans 38,598 38,598 Total acquired loans $ 486,282 $ 477,215 The table below presents the carrying amount of loans for which, at the date of acquisition, there was evidence of more than insignificant deterioration of credit quality since origination: (In thousands) August 6, 2021 Book balance of loans at acquisition $ 66,371 Allowance for credit losses at acquisition (3,046) Non-credit related discount (736) Total PCD loans acquired $ 62,589 The acquisition of Legacy Bank resulted in the addition of $11.2 million in allowance for credit losses, including the $3.0 million identified in the table above for PCD loans, and $8.2 million for non-PCD loans recorded through the provision for credit losses at the date of acquisition. The Company believes the deposits assumed in the acquisition have an intangible value. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships. Pro-Forma Information Pro-forma data for the three months ended March 31, 2022 presents information as if the acquisition of Legacy Bank occurred at the beginning of 2020, and the acquisitions of BBFC and Sabal Palm occurred at the beginning of 2021, as follows: Three Months Ended March 31, (In thousands, except per share amounts) 2022 2021 Net interest income $ 76,504 $ 78,107 Net income 25,270 38,097 EPS - basic $ 0.41 $ 0.62 EPS - diluted 0.41 0.63 Proposed Acquisition of Apollo Bancshares, Inc. On March 29, 2022, the Company announced its proposed acquisition of Apollo Bancshares, Inc. (“Apollo”). The transaction, which is expected to close early in the fourth quarter of 2022, will expand the Company’s presence in Miami-Dade County, part of the Miami-Fort Lauderdale-Pompano Beach MSA, Florida’s largest MSA and the 8 th largest in the nation. Apollo operates five branches across Miami-Dade County with deposits of approximately $947 million and loans of $705 million as of March 31, 2022. Completion of the Apollo merger is subject to certain conditions, including the receipt of regulatory approvals, the approval of Apollo and Apollo Bank shareholders and the satisfaction of other customary closing conditions.

Subsequent Event

Subsequent Event	3 Months Ended
	Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Event	Subsequent EventOn May 4, 2022, the Company announced its proposed acquisition of Drummond Banking Company (“Drummond”). The transaction, which is expected to close early in the fourth quarter of 2022, will expand the Company’s presence in new Florida markets including Ocala and Gainesville. Drummond operates 18 branches across North Florida with deposits of approximately $932 million and loans of $543 million as of March 31, 2022. Completion of the Drummond merger is subject to certain conditions, including the receipt of regulatory approvals, the approval of Drummond shareholders and the satisfaction of other customary closing conditions.

Basis of Presentation (Policies

Basis of Presentation (Policies)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation: The accompanying unaudited condensed consolidated financial statements of Seacoast Banking Corporation of Florida and its subsidiaries (the “Company”) have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Certain prior period amounts have been reclassified to conform to the current period presentation.
Use of Estimates	Use of Estimates: The preparation of these condensed consolidated financial statements requires management to make judgments in the application of certain accounting policies that involve significant estimates and assumptions. The Company has established policies and control procedures that are intended to ensure valuation methods are well controlled and applied consistently from period to period. These estimates and assumptions, which may materially affect the reported amounts of certain assets, liabilities, revenues and expenses, are based on information available as of the date of the financial statements, and changes in this information over time and the use of revised estimates and assumptions could materially affect amounts reported in subsequent financial statements. Specific areas, among others, requiring the application of management’s estimates include determination of the allowance for credit losses, acquisition accounting and purchased loans, intangible assets and impairment testing, other fair value measurements and contingent liabilities.
Recently Issued Accounting Standards, Not Yet Adopted	Recently Issued Accounting Standards, Not Yet Adopted In March 2022, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2022-02, Financial Instruments Credit Losses (Topic 326), Troubled Debt Restructurings and Vintage Disclosures . ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings (“TDRs”) in ASC 310-40, Receivables - Troubled Debt Restructurings by Creditors , and introduces new disclosures related to modifications with borrowers that are experiencing financial difficulties. ASU 2022-02 also requires the disclosure of current-period gross writeoffs by year of origination for financing receivables held at amortized cost. The amendments in ASU 2022-02 are effective for fiscal years beginning after December 15, 2022, and early adoption is permitted. The impact to the Company’s consolidated financial statements of the adoption of ASU 2022-02 is not expected to be material.
Fair Value Measurement	Held-to-maturity debt securities : These debt securities are reported at fair value utilizing level 2 inputs. The estimated fair value of a security is determined based on market quotations when available or, if not available, by using quoted market prices for similar securities, pricing models or discounted cash flow analyses, using observable market data where available. The Company reviews the prices supplied by independent pricing services, as well as their underlying pricing methodologies, for reasonableness and to ensure such prices are aligned with traditional pricing matrices. From time to time, the Company will validate, on a sample basis, prices supplied by the independent pricing service by comparison to prices obtained from other brokers and third-party sources or derived using internal models. Loans : Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type, such as commercial or mortgage. Each loan category is further segmented into fixed and adjustable-rate interest terms as well as performing and nonperforming categories. The fair value of loans is calculated by discounting scheduled cash flows through the estimated life including prepayment considerations, using estimated market discount rates that reflect the risks inherent in the loan. The fair value approach considers market-driven variables including credit related factors and reflects an “exit price” as defined in ASC Topic 820. Deposit liabilities : The fair value of demand deposits, savings accounts and money market deposits is the amount payable at the reporting date. The fair value of fixed maturity certificates of deposit is estimated using the rates currently offered for funding of similar remaining maturities.

Earnings per Share (Tables)

Earnings per Share (Tables)	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Three Months Ended March 31, (Dollars in thousands, except per share data) 2022 2021 Basic earnings per share Net income $ 20,588 $ 33,719 Average common shares outstanding 61,127 55,271 Net income per share $ 0.34 $ 0.61 Diluted earnings per share Net income $ 20,588 $ 33,719 Average common shares outstanding 61,127 55,271 Add: Dilutive effect of employee restricted stock and stock options 577 721 Average diluted shares outstanding 61,704 55,992 Net income per share $ 0.33 $ 0.60 Net income has not been allocated to unvested restricted stock awards that are participating securities because the amounts that would be allocated are not material to net income per share of common stock. Unvested restricted stock awards that are participating securities represent less than one percent of all of the outstanding shares of common stock for each of the periods presented.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Fair Value of Securities Available for Sale	The amortized cost, gross unrealized gains and losses and fair value of securities available-for-sale and held-to-maturity at March 31, 2022 and December 31, 2021 are summarized as follows: March 31, 2022 (In thousands) Amortized Gross Gross Unrealized Fair Debt securities available-for-sale U.S. Treasury securities and obligations of U.S. government agencies $ 6,240 $ 54 $ (13) $ 6,281 Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 1,335,336 829 (91,495) 1,244,670 Private mortgage-backed securities and collateralized mortgage obligations 114,286 284 (3,274) 111,296 Collateralized loan obligations 315,168 — (2,044) 313,124 Obligations of state and political subdivisions 31,533 518 (803) 31,248 Totals $ 1,802,563 $ 1,685 $ (97,629) $ 1,706,619 Debt securities held-to-maturity Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities $ 747,004 $ 15,397 $ (52,909) $ 709,492 Totals $ 747,004 $ 15,397 $ (52,909) $ 709,492 December 31, 2021 (In thousands) Amortized Gross Unrealized Gross Unrealized Fair Debt securities available-for-sale U.S. Treasury securities and obligations of U.S. government agencies $ 6,466 $ 316 $ (3) $ 6,779 Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 1,234,721 8,308 (20,309) 1,222,720 Private mortgage-backed securities and collateralized mortgage obligations 88,096 1,091 (420) 88,767 Collateralized loan obligations 292,751 63 (124) 292,690 Obligations of state and political subdivisions 31,624 1,740 (1) 33,363 Totals $ 1,653,658 $ 11,518 $ (20,857) $ 1,644,319 Debt securities held-to-maturity Mortgage-backed securities of U.S. government-sponsored entities $ 638,640 $ 3,828 $ (15,070) $ 627,398 Totals $ 638,640 $ 3,828 $ (15,070) $ 627,398
Summary of Amortized Cost and Fair Value of Held-to-Maturity Securities	The amortized cost, gross unrealized gains and losses and fair value of securities available-for-sale and held-to-maturity at March 31, 2022 and December 31, 2021 are summarized as follows: March 31, 2022 (In thousands) Amortized Gross Gross Unrealized Fair Debt securities available-for-sale U.S. Treasury securities and obligations of U.S. government agencies $ 6,240 $ 54 $ (13) $ 6,281 Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 1,335,336 829 (91,495) 1,244,670 Private mortgage-backed securities and collateralized mortgage obligations 114,286 284 (3,274) 111,296 Collateralized loan obligations 315,168 — (2,044) 313,124 Obligations of state and political subdivisions 31,533 518 (803) 31,248 Totals $ 1,802,563 $ 1,685 $ (97,629) $ 1,706,619 Debt securities held-to-maturity Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities $ 747,004 $ 15,397 $ (52,909) $ 709,492 Totals $ 747,004 $ 15,397 $ (52,909) $ 709,492 December 31, 2021 (In thousands) Amortized Gross Unrealized Gross Unrealized Fair Debt securities available-for-sale U.S. Treasury securities and obligations of U.S. government agencies $ 6,466 $ 316 $ (3) $ 6,779 Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 1,234,721 8,308 (20,309) 1,222,720 Private mortgage-backed securities and collateralized mortgage obligations 88,096 1,091 (420) 88,767 Collateralized loan obligations 292,751 63 (124) 292,690 Obligations of state and political subdivisions 31,624 1,740 (1) 33,363 Totals $ 1,653,658 $ 11,518 $ (20,857) $ 1,644,319 Debt securities held-to-maturity Mortgage-backed securities of U.S. government-sponsored entities $ 638,640 $ 3,828 $ (15,070) $ 627,398 Totals $ 638,640 $ 3,828 $ (15,070) $ 627,398
Summary of Investments Classified by Contractual Maturity	Securities not due at a single maturity date are shown separately. March 31, 2022 Held-to-Maturity Available-for-Sale (In thousands) Amortized Fair Amortized Fair Due in less than one year $ — $ — $ 2,776 $ 2,790 Due after one year through five years — — 14,493 14,807 Due after five years through ten years — — 5,705 5,698 Due after ten years — — 14,799 14,234 — — 37,773 37,529 Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 747,004 709,492 1,335,336 1,244,670 Private mortgage-backed securities and collateralized mortgage obligations — — 114,286 111,296 Collateralized loan obligations — — 315,168 313,124 Totals $ 747,004 $ 709,492 $ 1,802,563 $ 1,706,619
Schedule of Debt Securities in Unrealized Loss Position	The tables below indicate the fair value of available-for-sale debt securities with unrealized losses for which no allowance for credit losses has been recorded. March 31, 2022 Less Than 12 Months 12 Months or Longer Total (In thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury securities and obligations of U.S. government agencies $ 303 $ (11) $ 229 $ (2) $ 532 $ (13) Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 1,089,150 (80,423) 100,982 (11,072) 1,190,132 (91,495) Private mortgage-backed securities and collateralized mortgage obligations 84,333 (3,109) 4,721 (165) 89,054 (3,274) Collateralized loan obligations 298,334 (1,928) 14,790 (116) 313,124 (2,044) Obligations of state and political subdivisions 9,255 (803) — — 9,255 (803) Totals $ 1,481,375 $ (86,274) $ 120,722 $ (11,355) $ 1,602,097 $ (97,629) December 31, 2021 Less Than 12 Months 12 Months or Longer Total (In thousands) Fair Unrealized Fair Unrealized Fair Unrealized U.S. Treasury securities and obligations of U.S. government agencies $ 97 $ (1) $ 245 $ (2) $ 342 $ (3) Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities 955,881 (19,575) 11,953 (734) 967,834 (20,309) Private mortgage-backed securities and collateralized mortgage obligations 33,640 (173) 9,628 (247) 43,268 (420) Collateralized loan obligations 123,202 (81) 9,461 (43) 132,663 (124) Obligations of state and political subdivisions 499 (1) — — 499 (1) Totals $ 1,113,319 $ (19,831) $ 31,287 $ (1,026) $ 1,144,606 $ (20,857)

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
Schedule of Portfolio Loans, Purchased Credit Impaired Loans and Purchased Unimpaired Loans	The following tables present net loan balances by segment as of: March 31, 2022 (In thousands) Portfolio Loans Acquired Non-PCD Loans PCD Loans Total Construction and land development $ 226,149 $ 33,231 $ 41 $ 259,421 Commercial real estate - owner-occupied 990,929 273,498 20,088 1,284,515 Commercial real estate - non owner-occupied 1,400,270 488,400 77,480 1,966,150 Residential real estate 1,379,911 214,401 5,333 1,599,645 Commercial and financial 1,007,064 110,161 15,281 1,132,506 Consumer 165,650 4,074 — 169,724 Paycheck Protection Program 29,137 10,119 — 39,256 Totals $ 5,199,110 $ 1,133,884 $ 118,223 $ 6,451,217 December 31, 2021 (In thousands) Portfolio Loans Acquired Non-PCD Loans PCD Loans Total Construction and land development $ 199,341 $ 31,438 $ 45 $ 230,824 Commercial real estate - owner occupied 983,517 186,812 27,445 1,197,774 Commercial real estate - non-owner occupied 1,278,180 382,554 75,705 1,736,439 Residential real estate 1,261,306 156,957 7,091 1,425,354 Commercial and financial 968,318 84,395 16,643 1,069,356 Consumer 169,507 4,658 10 174,175 Paycheck Protection Program 69,503 21,604 — 91,107 Totals $ 4,929,672 $ 868,418 $ 126,939 $ 5,925,029
Schedule of Past Due Financing Receivables	The following tables present the status of net loan balances as of March 31, 2022 and December 31, 2021. March 31, 2022 (In thousands) Current Accruing Accruing Accruing Nonaccrual Total Portfolio Loans Construction and land development $ 225,921 $ — $ — $ — $ 228 $ 226,149 Commercial real estate - owner-occupied 990,260 — — — 669 990,929 Commercial real estate - non owner-occupied 1,399,902 35 — — 333 1,400,270 Residential real estate 1,372,141 155 275 — 7,340 1,379,911 Commercial and financial 1,000,983 2,738 — 40 3,303 1,007,064 Consumer 164,430 638 458 — 124 165,650 Paycheck Protection Program 1 29,109 28 — — — 29,137 Total Portfolio Loans $ 5,182,746 $ 3,594 $ 733 $ 40 $ 11,997 $ 5,199,110 Acquired Non-PCD Loans Construction and land development $ 33,231 $ — $ — $ — $ — $ 33,231 Commercial real estate - owner-occupied 273,498 — — — — 273,498 Commercial real estate - non owner-occupied 487,175 — — — 1,225 488,400 Residential real estate 213,208 — — — 1,193 214,401 Commercial and financial 109,805 282 — — 74 110,161 Consumer 3,837 — — — 237 4,074 Paycheck Protection Program 1 10,119 — — — — 10,119 Total Acquired Non-PCD Loans $ 1,130,873 $ 282 $ — $ — $ 2,729 $ 1,133,884 PCD Loans Construction and land development $ 37 $ — $ — $ — $ 4 $ 41 Commercial real estate - owner-occupied 16,915 — — — 3,173 20,088 Commercial real estate - non owner-occupied 74,256 — — — 3,224 77,480 Residential real estate 4,624 — — — 709 5,333 Commercial and financial 10,908 — — — 4,373 15,281 Consumer — — — — — — Total PCD Loans $ 106,740 $ — $ — $ — $ 11,483 $ 118,223 Total Loans $ 6,420,359 $ 3,876 $ 733 $ 40 $ 26,209 $ 6,451,217 1 Paycheck Protection Program loans are not reflected as past due when forgiveness applications are being processed by the SBA. Repayment of principal and interest is fully guaranteed by the U.S. government. December 31, 2021 (In thousands) Current Accruing Accruing Accruing Nonaccrual Total Portfolio Loans Construction and land development $ 199,087 $ — $ — $ — $ 254 $ 199,341 Commercial real estate - owner occupied 982,804 — — — 713 983,517 Commercial real estate - non-owner occupied 1,276,582 — — — 1,598 1,278,180 Residential real estate 1,248,160 3,457 143 — 9,546 1,261,306 Commercial and financial 963,828 851 41 — 3,598 968,318 Consumer 168,791 565 23 15 113 169,507 Paycheck Protection Program 1 69,434 — — 69 — 69,503 Total Portfolio Loans $ 4,908,686 $ 4,873 $ 207 $ 84 $ 15,822 $ 4,929,672 Acquired Non-PCD Loans Construction and land development $ 31,438 $ — $ — $ — $ — $ 31,438 Commercial real estate - owner occupied 186,652 — 160 — — 186,812 Commercial real estate - non-owner occupied 381,510 — — — 1,044 382,554 Residential real estate 154,981 182 — — 1,794 156,957 Commercial and financial 84,180 — 40 — 175 84,395 Consumer 4,082 135 — — 441 4,658 Paycheck Protection Program 1 21,567 — — 37 — 21,604 Total Acquired Non-PCD Loans $ 864,410 $ 317 $ 200 $ 37 $ 3,454 $ 868,418 PCD Loans Construction and land development $ 40 $ — $ — $ — $ 5 $ 45 Commercial real estate - owner occupied 24,192 — — — 3,253 27,445 Commercial real estate - non-owner occupied 72,442 — — — 3,263 75,705 Residential real estate 5,386 — — — 1,705 7,091 Commercial and financial 13,547 — — — 3,096 16,643 Consumer 10 — — — — 10 Total PCD Loans $ 115,617 $ — $ — $ — $ 11,322 $ 126,939 Total Loans $ 5,888,713 $ 5,190 $ 407 $ 121 $ 30,598 $ 5,925,029 1 Paycheck Protection Program loans are not reflected as past due when forgiveness applications are being processed by the SBA. Repayment of principal and interest is fully guaranteed by the U.S. government.
Schedule of Nonaccrual Loans by Loan Category	The following tables present net balances of loans on nonaccrual status and the related allowance for credit losses, if any, as of: March 31, 2022 (In thousands) Nonaccrual Loans With No Related Allowance Nonaccrual Loans With an Allowance Total Nonaccrual Loans Allowance for Credit Losses Construction and land development $ 12 $ 220 $ 232 $ 89 Commercial real estate - owner-occupied 2,871 971 3,842 380 Commercial real estate - non owner-occupied 3,406 1,376 4,782 18 Residential real estate 9,145 97 9,242 35 Commercial and financial 4,084 3,666 7,750 1,945 Consumer 23 338 361 329 Totals $ 19,541 $ 6,668 $ 26,209 $ 2,796 December 31, 2021 (In thousands) Nonaccrual Loans With No Related Allowance Nonaccrual Loans With an Allowance Total Nonaccrual Loans Allowance for Credit Losses Construction and land development $ 37 $ 222 $ 259 $ 92 Commercial real estate - owner-occupied 2,976 990 3,966 419 Commercial real estate - non owner-occupied 4,490 1,415 5,905 27 Residential real estate 12,358 687 13,045 357 Commercial and financial 2,676 4,193 6,869 2,384 Consumer 29 525 554 525 Totals $ 22,566 $ 8,032 $ 30,598 $ 3,804
Schedule of Collateral Dependent Loans	The following table presents collateral-dependent loans as of: (In thousands) March 31, 2022 December 31, 2021 Construction and land development $ 248 $ 271 Commercial real estate - owner-occupied 4,581 4,706 Commercial real estate - non owner-occupied 3,619 4,923 Residential real estate 12,482 16,334 Commercial and financial 8,033 8,741 Consumer 478 741 Totals $ 29,441 $ 35,716
Schedule of Risk Categories of Loans by Class of Loans	The following tables present the risk rating of loans by year of origination as of: March 31, 2022 (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Total Construction and Land Development Risk Ratings: Pass $ 15,252 $ 118,289 $ 22,227 $ 30,059 $ 16,221 $ 16,738 $ 40,387 $ 259,173 Special Mention — — — — — — — — Substandard — — — — — 7 — 7 Substandard Impaired — — — — 220 21 — 241 Doubtful — — — — — — — — Total $ 15,252 $ 118,289 $ 22,227 $ 30,059 $ 16,441 $ 16,766 $ 40,387 $ 259,421 Commercial real estate - owner-occupied Risk Ratings: Pass $ 57,482 $ 216,122 $ 161,838 $ 192,208 $ 128,139 $ 492,637 $ 11,429 $ 1,259,855 Special Mention — — 6,464 5,322 641 1,528 — 13,955 Substandard — — — — — 5,359 350 5,709 Substandard Impaired — — — 2,672 310 2,014 — 4,996 Doubtful — — — — — — — — Total $ 57,482 $ 216,122 $ 168,302 $ 200,202 $ 129,090 $ 501,538 $ 11,779 $ 1,284,515 Commercial real estate - non owner-occupied Risk Ratings: Pass $ 174,966 $ 415,704 $ 227,927 $ 305,852 $ 186,363 $ 578,279 $ 7,563 $ 1,896,654 Special Mention — — — 837 — 10,640 — 11,477 Substandard — — 4,753 5,351 23,146 19,242 — 52,492 Substandard Impaired — — 1,044 1,849 — 2,634 — 5,527 Doubtful — — — — — — — — Total $ 174,966 $ 415,704 $ 233,724 $ 313,889 $ 209,509 $ 610,795 $ 7,563 $ 1,966,150 Residential real estate Risk Ratings: Pass $ 14,211 $ 564,750 $ 120,963 $ 90,420 $ 110,413 $ 311,573 $ 370,928 $ 1,583,258 Special Mention — — — — 13 1,120 75 1,208 Substandard — — 338 — 55 1,480 201 2,074 Substandard Impaired — — 144 134 38 9,777 3,012 13,105 Doubtful — — — — — — — — Total $ 14,211 $ 564,750 $ 121,445 $ 90,554 $ 110,519 $ 323,950 $ 374,216 $ 1,599,645 March 31, 2022 (In thousands) 2022 2021 2020 2019 2018 Prior Revolving Total Commercial and financial Risk Ratings: Pass $ 51,836 $ 351,023 $ 176,311 $ 90,587 $ 63,294 $ 89,736 $ 271,721 $ 1,094,508 Special Mention — 504 14,956 449 235 637 385 17,166 Substandard — — 212 2,466 2,104 3,365 273 8,420 Substandard Impaired — — 219 4,534 4,615 2,945 99 12,412 Doubtful — — — — — — — — Total $ 51,836 $ 351,527 $ 191,698 $ 98,036 $ 70,248 $ 96,683 $ 272,478 $ 1,132,506 Consumer Risk Ratings: Pass $ 9,049 $ 46,934 $ 28,939 $ 23,469 $ 15,271 $ 20,920 $ 21,607 $ 166,189 Special Mention — 7 43 100 38 437 1,748 2,373 Substandard — 437 — 8 — — 191 636 Substandard Impaired — 7 21 89 34 153 222 526 Doubtful — — — — — — — — Total $ 9,049 $ 47,385 $ 29,003 $ 23,666 $ 15,343 $ 21,510 $ 23,768 $ 169,724 Paycheck Protection Program Risk Ratings: Pass $ — $ 37,304 $ 1,952 $ — $ — $ — $ — $ 39,256 Total $ — $ 37,304 $ 1,952 $ — $ — $ — $ — $ 39,256 Consolidated Risk Ratings: Pass $ 322,796 $ 1,750,126 $ 740,157 $ 732,595 $ 519,701 $ 1,509,883 $ 723,635 $ 6,298,893 Special Mention — 511 21,463 6,708 927 14,362 2,208 46,179 Substandard — 437 5,303 7,825 25,305 29,453 1,015 69,338 Substandard Impaired — 7 1,428 9,278 5,217 17,544 3,333 36,807 Doubtful — — — — — — — — Total $ 322,796 $ 1,751,081 $ 768,351 $ 756,406 $ 551,150 $ 1,571,242 $ 730,191 $ 6,451,217 December 31, 2021 (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Total Construction and Land Development Risk Ratings: Pass $ 94,318 $ 23,860 $ 38,058 $ 25,507 $ 3,995 $ 15,466 $ 29,349 $ 230,553 Special Mention — — — — — — — — Substandard — — — — — — — — Substandard Impaired — — — 222 — 49 — 271 Doubtful — — — — — — — — Total $ 94,318 $ 23,860 $ 38,058 $ 25,729 $ 3,995 $ 15,515 $ 29,349 $ 230,824 Commercial real estate - owner-occupied Risk Ratings: Pass $ 205,404 $ 154,432 $ 179,786 $ 132,353 $ 125,763 $ 363,986 $ 10,005 $ 1,171,729 Special Mention — 6,527 5,370 649 218 3,250 — 16,014 Substandard — — — — 3,290 1,610 — 4,900 Substandard Impaired — — 2,742 310 596 1,483 — 5,131 Doubtful — — — — — — — — Total $ 205,404 $ 160,959 $ 187,898 $ 133,312 $ 129,867 $ 370,329 $ 10,005 $ 1,197,774 December 31, 2021 (In thousands) 2021 2020 2019 2018 2017 Prior Revolving Total Commercial real estate - non owner-occupied Risk Ratings: Pass $ 395,308 $ 207,824 $ 298,021 $ 186,339 $ 110,990 $ 460,435 $ 6,477 $ 1,665,394 Special Mention — — 844 — 289 13,850 — 14,983 Substandard — 4,776 3,009 23,206 1,900 17,266 — 50,157 Substandard Impaired — 1,044 1,849 — 326 2,686 — 5,905 Doubtful — — — — — — — — Total $ 395,308 $ 213,644 $ 303,723 $ 209,545 $ 113,505 $ 494,237 $ 6,477 $ 1,736,439 Residential real estate Risk Ratings: Pass $ 394,547 $ 114,364 $ 90,566 $ 119,836 $ 118,556 $ 213,950 $ 354,439 $ 1,406,258 Special Mention — — — 70 — 1,243 532 1,845 Substandard — 340 — — 58 422 86 906 Substandard Impaired — 149 724 39 4,415 8,507 2,511 16,345 Doubtful — — — — — — — — Total $ 394,547 $ 114,853 $ 91,290 $ 119,945 $ 123,029 $ 224,122 $ 357,568 $ 1,425,354 Commercial and financial Risk Ratings: Pass $ 340,826 $ 180,677 $ 97,072 $ 68,232 $ 39,331 $ 56,053 $ 246,568 $ 1,028,759 Special Mention 530 15,587 — 237 251 84 876 17,565 Substandard — 371 2,605 3,594 1,436 3,217 339 11,562 Substandard Impaired — 196 4,561 3,694 1,371 1,520 128 11,470 Doubtful — — — — — — — — Total $ 341,356 $ 196,831 $ 104,238 $ 75,757 $ 42,389 $ 60,874 $ 247,911 $ 1,069,356 Consumer Risk Ratings: Pass $ 45,063 $ 31,342 $ 26,194 $ 17,300 $ 9,979 $ 16,019 $ 25,418 $ 171,315 Special Mention — 24 431 37 167 3 1,199 1,861 Substandard — — 18 — 17 — 223 258 Substandard Impaired — — 92 23 74 118 434 741 Doubtful — — — — — — — — Total $ 45,063 $ 31,366 $ 26,735 $ 17,360 $ 10,237 $ 16,140 $ 27,274 $ 174,175 Paycheck Protection Program Risk Ratings: Pass $ 87,036 $ 4,071 $ — $ — $ — $ — $ — $ 91,107 Total $ 87,036 $ 4,071 $ — $ — $ — $ — $ — $ 91,107 Consolidated Risk Ratings: Pass $ 1,562,502 $ 716,570 $ 729,697 $ 549,567 $ 408,614 $ 1,125,909 $ 672,256 $ 5,765,115 Special Mention 530 22,138 6,645 993 925 18,430 2,607 52,268 Substandard — 5,487 5,632 26,800 6,701 22,515 648 67,783 Substandard Impaired — 1,389 9,968 4,288 6,782 14,363 3,073 39,863 Doubtful — — — — — — — — Total $ 1,563,032 $ 745,584 $ 751,942 $ 581,648 $ 423,022 $ 1,181,217 $ 678,584 $ 5,925,029
Schedule of Troubled Debt Restructuring	The following table presents loans that were modified in a troubled debt restructuring during the three months ended March 31, 2022 and March 31, 2021: Three Months Ended March 31, 2022 2021 (In thousands) Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Construction and land development — $ — $ — — $ — $ — Commercial real estate - owner-occupied — — — — — — Commercial real estate - non owner-occupied — — — — — — Residential real estate 3 785 785 1 27 27 Commercial and financial 1 33 33 — — — Consumer 4 22 22 — — — Totals 8 $ 840 $ 840 1 $ 27 $ 27

Allowance for Credit Losses (Ta

Allowance for Credit Losses (Tables)	3 Months Ended
	Mar. 31, 2022
Receivables [Abstract]
Schedule of Allowance for Credit Losses	Activity in the allowance for credit losses is summarized as follows: Three Months Ended March 31, 2022 (In thousands) Beginning Initial Allowance on PCD Loans Acquired During the Period Provision Charge- Recoveries TDR Ending Construction and land development $ 2,751 $ — $ (493) $ — $ 10 $ — $ 2,268 Commercial real estate - owner-occupied 8,579 — 715 — — — 9,294 Commercial real estate - non owner-occupied 36,617 31 7,274 — — — 43,922 Residential real estate 12,811 17 1,060 (1) 191 (3) 14,075 Commercial and financial 19,744 3 (1,628) (569) 177 — 17,727 Consumer 2,813 — (372) (95) 208 (2) 2,552 Paycheck Protection Program — — — — — — — Totals $ 83,315 $ 51 $ 6,556 $ (665) $ 586 $ (5) $ 89,838 Three Months Ended March 31, 2021 (In thousands) Beginning Provision Charge- Recoveries TDR Ending Construction and land development $ 4,920 $ (510) $ — $ 18 $ — $ 4,428 Commercial real estate - owner occupied 9,868 (76) — — — 9,792 Commercial real estate - non-owner occupied 38,266 (2,038) — 1 — 36,229 Residential real estate 17,500 (3,372) — 229 (4) 14,353 Commercial and financial 18,690 775 (756) 207 — 18,916 Consumer 3,489 (494) (185) 116 (1) 2,925 Paycheck Protection Program — — — — — — Totals $ 92,733 $ (5,715) $ (941) $ 571 $ (5) $ 86,643
Schedule of Loan Portfolio, Excluding PCI Loans and Related Allowance	The allowance for credit losses is composed of specific allowances for loans individually evaluated and general allowances for loans grouped into loan pools based on similar characteristics, which are collectively evaluated. The Company’s loan portfolio and related allowance at March 31, 2022 and December 31, 2021 is shown in the following tables: March 31, 2022 Individually Evaluated Collectively Evaluated Total (In thousands) Recorded Associated Recorded Associated Recorded Associated Construction and land development $ 248 $ 89 $ 259,173 $ 2,179 $ 259,421 $ 2,268 Commercial real estate - owner occupied 4,996 380 1,279,519 8,914 1,284,515 9,294 Commercial real estate - non owner-occupied 5,527 787 1,960,623 43,135 1,966,150 43,922 Residential real estate 13,154 312 1,586,491 13,763 1,599,645 14,075 Commercial and financial 13,172 2,511 1,119,334 15,216 1,132,506 17,727 Consumer 540 481 169,184 2,071 169,724 2,552 Paycheck Protection Program — — 39,256 — 39,256 — Totals $ 37,637 $ 4,560 $ 6,413,580 $ 85,278 $ 6,451,217 $ 89,838 December 31, 2021 Individually Evaluated Collectively Evaluated Total (In thousands) Recorded Associated Recorded Associated Recorded Associated Construction and land development $ 271 $ 92 $ 230,553 $ 2,659 $ 230,824 $ 2,751 Commercial real estate - owner occupied 5,131 419 1,192,643 8,160 1,197,774 8,579 Commercial real estate - non owner-occupied 5,905 27 1,730,534 36,590 1,736,439 36,617 Residential real estate 16,345 646 1,409,009 12,165 1,425,354 12,811 Commercial and financial 11,470 2,885 1,057,886 16,859 1,069,356 19,744 Consumer 741 685 173,434 2,128 174,175 2,813 Paycheck Protection Program — — 91,107 — 91,107 — Totals $ 39,863 $ 4,754 $ 5,885,166 $ 78,561 $ 5,925,029 $ 83,315

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	(In thousands) Notional Amount Fair Value Balance Sheet Category At March 31, 2022 Back-to-back swaps $ 209,904 $ 8,923 Other Assets and Other Liabilities Interest rate floors 300,000 122 Other Assets At December 31, 2021 Back-to-back swaps $ 175,392 $ 8,022 Other Assets and Other Liabilities Interest rate floors 300,000 290 Other Assets

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	3 Months Ended
	Mar. 31, 2022
Brokers and Dealers [Abstract]
Schedule of Securities Sold Under Agreements to Repurchase and Securities Pledged	Company securities pledged were as follows by collateral type and maturity as of: (In thousands) March 31, 2022 December 31, 2021 Fair value of pledged securities - overnight and continuous: Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities $ 152,817 $ 134,577

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2022
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Assets Measured on Recurring and Nonrecurring Basis	Under ASC Topic 820, fair value measurements for items measured at fair value on a recurring and nonrecurring basis at March 31, 2022 and December 31, 2021 included: (In thousands) Fair Value Quoted Prices Significant Significant At March 31, 2022 Financial Assets Available-for-sale debt securities 1 $ 1,706,619 $ 191 $ 1,706,428 $ — Derivative financial instruments 2 9,045 — 9,045 — Loans held for sale 2 20,615 — 20,615 — Loans 3 8,395 — 1,517 6,878 Other real estate owned 4 11,567 — 2,420 9,147 Equity securities 5 8,864 8,864 — — Financial Liabilities Derivative financial instruments 2 $ 8,923 $ — $ 8,923 $ — At December 31, 2021 Financial Assets Available-for-sale debt securities 1 $ 1,644,319 $ 197 $ 1,644,122 $ — Derivative financial instruments 2 8,312 — 8,312 — Loans held for sale 2 31,791 — 31,791 — Loans 3 8,443 — 1,558 6,885 Other real estate owned 4 13,618 — — 13,618 Equity securities 5 9,316 9,316 — — Financial Liabilities Derivative financial instruments 2 $ 8,022 $ — $ 8,022 $ — 1 See “ Note 3 – Securities ” for further detail of fair value of individual investment categories. 2 Recurring fair value basis determined using observable market data. 3 S e e “ Note 4 – Loans .” N onrecurring fair value adjustments to collateral-dependent loans reflect full or partial write-downs that are based on current appraised values of the collateral in accordance with ASC Topic 310. 4 Fair value is measured on a nonrecurring basis in accordance with ASC Topic 360. 5 An investment in shares of a mutual fund that invests primarily in CRA-qualified debt securities, reported at fair value in Other Assets. Recurring fair value basis is determined using market quotations.
Schedule of Aggregate Fair Value and Contractual Balance of Loans for Sale	The aggregate fair value and contractual balance of loans held for sale as of March 31, 2022 and December 31, 2021 is as follows: (In thousands) March 31, 2022 December 31, 2021 Aggregate fair value $ 20,615 $ 31,791 Contractual balance 20,087 30,963 Excess 528 828
Schedule of Carrying Amount and Fair Value of Other Significant Financial Instruments Not Measured on a Recurring Basis	The carrying amount and fair value of the Company’s other financial instruments that were not disclosed previously in the balance sheet and for which carrying amount is not fair value as of March 31, 2022 and December 31, 2021 is as follows: (In thousands) Carrying Amount Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs March 31, 2022 Financial Assets Debt securities held-to-maturity 1 $ 747,004 $ — $ 709,492 $ — Time deposits with other banks 5,975 — 5,933 — Loans, net 6,352,984 — — 6,423,158 Financial Liabilities Deposit liabilities 9,243,768 — — 9,238,260 Subordinated debt 71,716 — 69,416 — December 31, 2021 Financial Assets Debt securities held-to-maturity 1 $ 638,640 $ — $ 627,398 $ — Loans, net 5,833,271 — — 5,907,447 Financial Liabilities Deposit liabilities 8,067,589 — — 8,067,995 Subordinated debt 71,646 — 69,348 — 1 See “ Note 3 – Securities ” for further detail of individual investment categories.

Business Combinations (Tables)

Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Schedule of Purchase Price Calculation	The Company acquired 100% of the outstanding common stock of BBFC. Under the terms of the definitive agreement, each share of BBFC common stock was converted into the right to receive 0.7997 of a share of Seacoast common stock. (In thousands, except per share data) January 3, 2022 Number of BBFC common shares outstanding 1,112 Per share exchange ratio 0.7997 Number of shares of common stock issued 889 Multiplied by common stock price per share on January 3, 2022 $ 35.39 Value of common stock issued 31,480 Fair value of options converted 497 Total purchase price $ 31,977 The Company acquired 100% of the outstanding common stock of Sabal Palm. Under the terms of the definitive agreement, each share of Sabal Palm common stock was converted into the right to receive 0.2203 of a share of Seacoast common stock. (In thousands, except per share data) January 3, 2022 Number of Sabal Palm common shares outstanding 7,536 Per share exchange ratio 0.2203 Number of shares of common stock issued 1,660 Multiplied by common stock price per share on January 3, 2022 $ 35.39 Value of common stock issued 58,762 Fair value of options converted 3,336 Total purchase price $ 62,098 The Company acquired 100% of the outstanding common stock of Legacy Bank. Under the terms of the definitive agreement, each share of Legacy Bank common stock was converted into the right to receive 0.1703 of a share of Seacoast common stock. (In thousands, except per share data) August 6, 2021 Number of Legacy Bank common shares outstanding 15,778 Per share exchange ratio 0.1703 Number of shares of common stock issued 2,687 Multiplied by common stock price per share on August 6, 2021 $ 32.19 Value of common stock issued 86,487 Cash paid for fractional shares 7 Fair value of options converted 4,736 Total purchase price $ 91,230
Schedule of Business Acquisitions	(In thousands) Initially Measured Assets: Cash $ 38,332 Investment securities 26,011 Loans 121,774 Bank premises and equipment 2,102 Core deposit intangibles 2,621 Goodwill 7,962 Total assets $ 198,802 Liabilities: Deposits 166,326 Other liabilities 499 Total liabilities $ 166,825 (In thousands) Initially Measured Assets: Cash $ 170,609 Time deposits with other banks 6,473 Loans 246,152 Bank premises and equipment 1,745 Core deposit intangibles 5,587 Goodwill 26,489 Other assets 5,189 Total assets $ 462,244 Liabilities: Deposits 395,952 Other liabilities 4,194 Total liabilities $ 400,146 As part of the Legacy Bank acquisition, 356,497 options were granted to replace outstanding Legacy Bank options. These options had a weighted average exercise price of $16.70 and were fully vested upon acquisition. In accordance with ASC Topic 805, Business Combinations , the value of the replacement awards associated with pre-combination service, $4.7 million, was considered purchase consideration, and the value of the replacement awards associated with post-combination service, $0.9 million, was recognized as compensation expense in 2021. (In thousands) Initially Measured Assets: Cash $ 98,107 Investment securities 992 Loans 477,215 Bank premises and equipment 2,577 Core deposit intangibles 3,454 Goodwill 30,978 Other assets 15,532 Total assets $ 628,855 Liabilities: Deposits 494,921 Other liabilities 42,705 Total liabilities $ 537,626
Schedule of Fair Value of Acquired Loans, Unpaid Principal Balance, Purchase Price and Allowance for Credit Losses	The table below presents information with respect to the fair value and unpaid principal balance of acquired loans at the acquisition date. January 3, 2022 (In thousands) Book Balance Fair Value Loans: Construction and land development $ 8,677 $ 8,414 Commercial real estate - owner-occupied 45,403 44,564 Commercial real estate - non owner-occupied 53,065 52,034 Residential real estate 5,377 5,421 Commercial and financial 9,376 9,321 Consumer 59 61 PPP loans 1,959 1,959 Total acquired loans $ 123,916 $ 121,774 The table below presents information with respect to the fair value and unpaid principal balance of acquired loans at the acquisition date. January 3, 2022 (In thousands) Book Balance Fair Value Loans: Construction and land development $ 9,256 $ 9,009 Commercial real estate - owner-occupied 57,690 56,591 Commercial real estate - non owner-occupied 89,153 87,280 Residential real estate 71,469 72,227 Commercial and financial 17,797 17,501 Consumer 233 232 PPP loans 3,312 3,312 Total acquired loans $ 248,910 $ 246,152 The table below presents information with respect to the fair value and unpaid principal balance of acquired loans at the acquisition date. August 6, 2021 (In thousands) Book Balance Fair Value Loans: Construction and land development $ 37,558 $ 36,651 Commercial real estate - owner-occupied 35,765 35,363 Commercial real estate - non owner-occupied 241,322 237,091 Residential real estate 71,118 70,541 Commercial and financial 61,274 58,324 Consumer 647 647 PPP loans 38,598 38,598 Total acquired loans $ 486,282 $ 477,215
Schedule Purchase Credit Deteriorated Loans Acquired	The table below presents the carrying amount of loans for which, at the date of acquisition, there was evidence of more than insignificant deterioration of credit quality since origination: (In thousands) January 3, 2022 Book balance of loans at acquisition $ 714 Allowance for credit losses at acquisition (15) Non-credit related discount (48) Total PCD loans acquired $ 651 The table below presents the carrying amount of loans for which, at the date of acquisition, there was evidence of more than insignificant deterioration of credit quality since origination: (In thousands) January 3, 2022 Book balance of loans at acquisition $ 3,703 Allowance for credit losses at acquisition (37) Non-credit related discount (663) Total PCD loans acquired $ 3,003 The table below presents the carrying amount of loans for which, at the date of acquisition, there was evidence of more than insignificant deterioration of credit quality since origination: (In thousands) August 6, 2021 Book balance of loans at acquisition $ 66,371 Allowance for credit losses at acquisition (3,046) Non-credit related discount (736) Total PCD loans acquired $ 62,589
Schedule of Pro-Forma Data	Pro-forma data for the three months ended March 31, 2022 presents information as if the acquisition of Legacy Bank occurred at the beginning of 2020, and the acquisitions of BBFC and Sabal Palm occurred at the beginning of 2021, as follows: Three Months Ended March 31, (In thousands, except per share amounts) 2022 2021 Net interest income $ 76,504 $ 78,107 Net income 25,270 38,097 EPS - basic $ 0.41 $ 0.62 EPS - diluted 0.41 0.63

Earnings per Share - Narrative

Earnings per Share - Narrative (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Antidilutive securities excluded from diluted earnings per share calculation (in shares)	0	0

Earnings per Share - Schedule o

Earnings per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic earnings per share
Net income	$ 20,588	$ 33,719
Average common shares outstanding (in shares)	61,127	55,271
Net income per share (in dollars per share)	$ 0.34	$ 0.61
Diluted earnings per share
Average common shares outstanding (in shares)	61,127	55,271
Add: Dilutive effect of employee restricted stock and stock options (in shares)	577	721
Average diluted shares outstanding (in shares)	61,704	55,992
Net income per share (in dollars per share)	$ 0.33	$ 0.60

Securities - Amortized Cost and

Securities - Amortized Cost and Fair Value of Securities Available for Sale and Held for Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt securities available-for-sale
Available for sale, amortized cost, total	$ 1,802,563	$ 1,653,658
Available for sale, gross unrealized gains	1,685	11,518
Available for sale, gross unrealized losses	(97,629)	(20,857)
Available for sale, fair value	1,706,619	1,644,319
Debt securities held-to-maturity
Held to maturity, amortized cost, total	747,004	638,640
Held to maturity, gross unrealized gains	15,397	3,828
Held to maturity, gross unrealized losses	(52,909)	(15,070)
Held to maturity, fair value	709,492	627,398
U.S. Treasury securities and obligations of U.S. government agencies
Debt securities available-for-sale
Available for sale, amortized cost, total	6,240	6,466
Available for sale, gross unrealized gains	54	316
Available for sale, gross unrealized losses	(13)	(3)
Available for sale, fair value	6,281	6,779
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Debt securities available-for-sale
Available for sale, amortized cost, total	1,335,336	1,234,721
Available for sale, gross unrealized gains	829	8,308
Available for sale, gross unrealized losses	(91,495)	(20,309)
Available for sale, fair value	1,244,670	1,222,720
Debt securities held-to-maturity
Held to maturity, amortized cost, total		638,640
Held to maturity, gross unrealized gains		3,828
Held to maturity, gross unrealized losses		(15,070)
Held to maturity, fair value	709,492	627,398
Private mortgage-backed securities and collateralized mortgage obligations
Debt securities available-for-sale
Available for sale, amortized cost, total	114,286	88,096
Available for sale, gross unrealized gains	284	1,091
Available for sale, gross unrealized losses	(3,274)	(420)
Available for sale, fair value	111,296	88,767
Debt securities held-to-maturity
Held to maturity, fair value	0
Collateralized loan obligations
Debt securities available-for-sale
Available for sale, amortized cost, total	315,168	292,751
Available for sale, gross unrealized gains	0	63
Available for sale, gross unrealized losses	(2,044)	(124)
Available for sale, fair value	313,124	292,690
Debt securities held-to-maturity
Held to maturity, fair value	0
Obligations of state and political subdivisions
Debt securities available-for-sale
Available for sale, amortized cost, total	31,533	31,624
Available for sale, gross unrealized gains	518	1,740
Available for sale, gross unrealized losses	(803)	(1)
Available for sale, fair value	31,248	$ 33,363
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Debt securities held-to-maturity
Held to maturity, amortized cost, total	747,004
Held to maturity, gross unrealized gains	15,397
Held to maturity, gross unrealized losses	(52,909)
Held to maturity, fair value	$ 709,492

Securities - Narrative (Details

Securities - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available-for-sale debt securities, including legacy securities	$ 26,000	$ 0
Securities transferred from available for sale to held to maturity		210,800
Securities transferred from available for sale to held to maturity, unrealized gains		800
Unrealized losses on mortgage backed securities of government sponsored entities	97,629		$ 20,857
Fair value of securities in unrealized loss position	1,602,097		1,144,606
Held-to-maturity securities, allowance for credit loss	0
Federal Home Loan Bank and Federal Reserve stock recorded in other assets	38,100
Accrued interest receivable on AFS debt securities	3,400		3,400
Accrued interest receivable on HTM debt securities	$ 1,200		1,000
Common Class B | Visa
Debt Securities, Available-for-sale [Line Items]
Shares of Visa stock held (in shares)	11,330
Common Class A | Visa
Debt Securities, Available-for-sale [Line Items]
Conversion rate of Class A stock for each share of Class B stock (in shares)	1.6181
Shares issued (in shares)	18,333
CRA - Qualified Mutual Fund
Debt Securities, Available-for-sale [Line Items]
Gross losses from sale of securities	$ 500	$ 100
Investment in mutual fund carried at fair value	8,900
Public Deposits and Secured Borrowings | Carrying Value | Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Fair value of debt securities pledged as collateral	446,700
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	91,495		20,309
Fair value of securities in unrealized loss position	1,190,132		967,834
Allowance for credit losses on AFS debt securities	0
Private mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	3,274		420
Fair value of securities in unrealized loss position	89,054		43,268
Allowance for credit losses on AFS debt securities	$ 0
Average credit support percentage	24.00%
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Unrealized losses on mortgage backed securities of government sponsored entities	$ 2,044		124
Fair value of securities in unrealized loss position	313,124		$ 132,663
Allowance for credit losses on AFS debt securities	$ 0
Collateralized loan obligations | Standard & Poor's, AAA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	37.00%
Collateralized loan obligations | Standard & Poor's, AA Rating
Debt Securities, Available-for-sale [Line Items]
Number of positions held, percentage of total	25.00%

Securities - Amortized Cost a_2

Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Amortized Cost
Held to maturity, amortized cost, total	$ 747,004	$ 638,640
Fair Value
Held to maturity, fair value, total	709,492	627,398
Amortized Cost
Available for sale, amortized cost, total	1,802,563	1,653,658
Fair Value
Available for sale, fair value, total	1,706,619	1,644,319
Other debt
Amortized Cost
Held to maturity, amortized cost, due in less than one year	0
Held to maturity, amortized cost, due after one year through five years	0
Held to maturity, amortized cost, due after five years through ten years	0
Held to maturity, amortized cost, due after ten years	0
Held to maturity, amortized cost, total	0
Fair Value
Held to maturity, fair value, due in less than one year	0
Held to maturity, fair value, due after one year through five years	0
Held to maturity, fair value, due after five years through ten years	0
Held to maturity, fair value, due after ten years	0
Held to maturity, fair value, total	0
Amortized Cost
Available for sale, amortized cost, due in less than one year	2,776
Available for sale, amortized cost, due after one year through five years	14,493
Available for sale, amortized cost, due after five years through ten years	5,705
Available for sale, amortized cost, due after ten years	14,799
Available for sale, amortized cost, total	37,773
Fair Value
Available for sale, fair value, due in less than one year	2,790
Available for sale, fair value, due after one year through five years	14,807
Available for sale, fair value, due after five years through ten years	5,698
Available for sale, fair value, due after ten years	14,234
Available for sale, fair value, total	37,529
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Amortized Cost
Held to maturity, amortized cost, total	747,004
Fair Value
Held to maturity, fair value, total	709,492	627,398
Amortized Cost
Available for sale, amortized cost, total	1,335,336	1,234,721
Fair Value
Available for sale, fair value, total	1,244,670	1,222,720
Private mortgage-backed securities and collateralized mortgage obligations
Amortized Cost
Held to maturity, amortized cost, total	0
Fair Value
Held to maturity, fair value, total	0
Amortized Cost
Available for sale, amortized cost, total	114,286	88,096
Fair Value
Available for sale, fair value, total	111,296	88,767
Collateralized loan obligations
Amortized Cost
Held to maturity, amortized cost, total	0
Fair Value
Held to maturity, fair value, total	0
Amortized Cost
Available for sale, amortized cost, total	315,168	292,751
Fair Value
Available for sale, fair value, total	$ 313,124	$ 292,690

Securities - Schedule of Unreal

Securities - Schedule of Unrealized Loss and Fair Value on Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value
Less Than 12 Months	$ 1,481,375	$ 1,113,319
12 Months or Longer	120,722	31,287
Total	1,602,097	1,144,606
Unrealized Losses
Less Than 12 Months	(86,274)	(19,831)
12 Months or Longer	(11,355)	(1,026)
Total	(97,629)	(20,857)
U.S. Treasury securities and obligations of U.S. government agencies
Fair Value
Less Than 12 Months	303	97
12 Months or Longer	229	245
Total	532	342
Unrealized Losses
Less Than 12 Months	(11)	(1)
12 Months or Longer	(2)	(2)
Total	(13)	(3)
Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Fair Value
Less Than 12 Months	1,089,150	955,881
12 Months or Longer	100,982	11,953
Total	1,190,132	967,834
Unrealized Losses
Less Than 12 Months	(80,423)	(19,575)
12 Months or Longer	(11,072)	(734)
Total	(91,495)	(20,309)
Private mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	84,333	33,640
12 Months or Longer	4,721	9,628
Total	89,054	43,268
Unrealized Losses
Less Than 12 Months	(3,109)	(173)
12 Months or Longer	(165)	(247)
Total	(3,274)	(420)
Collateralized loan obligations
Fair Value
Less Than 12 Months	298,334	123,202
12 Months or Longer	14,790	9,461
Total	313,124	132,663
Unrealized Losses
Less Than 12 Months	(1,928)	(81)
12 Months or Longer	(116)	(43)
Total	(2,044)	(124)
Obligations of state and political subdivisions
Fair Value
Less Than 12 Months	9,255	499
12 Months or Longer	0	0
Total	9,255	499
Unrealized Losses
Less Than 12 Months	(803)	(1)
12 Months or Longer	0	0
Total	$ (803)	$ (1)

Loans - Schedule of Portfolio L

Loans - Schedule of Portfolio Loans, Purchased Credit Impaired Loans and Purchased Unimpaired Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 6,451,217	$ 5,925,029
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	259,421	230,824
Commercial real estate - owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,284,515	1,197,774
Commercial real estate - non owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,966,150	1,736,439
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,599,645	1,425,354
Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,132,506	1,069,356
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	169,724	174,175
Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	39,256	91,107
Acquired Non-PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,133,884	868,418
Acquired Non-PCD Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	33,231	31,438
Acquired Non-PCD Loans | Commercial real estate - owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	273,498	186,812
Acquired Non-PCD Loans | Commercial real estate - non owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	488,400	382,554
Acquired Non-PCD Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	214,401	156,957
Acquired Non-PCD Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	110,161	84,395
Acquired Non-PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	4,074	4,658
Acquired Non-PCD Loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	10,119	21,604
PCD Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	118,223	126,939
PCD Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	41	45
PCD Loans | Commercial real estate - owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	20,088	27,445
PCD Loans | Commercial real estate - non owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	77,480	75,705
PCD Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,333	7,091
PCD Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	15,281	16,643
PCD Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	10
PCD Loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	5,199,110	4,929,672
Portfolio Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	226,149	199,341
Portfolio Loans | Commercial real estate - owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	990,929	983,517
Portfolio Loans | Commercial real estate - non owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,400,270	1,278,180
Portfolio Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,379,911	1,261,306
Portfolio Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,007,064	968,318
Portfolio Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	165,650	169,507
Portfolio Loans | Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 29,137	$ 69,503

Loans - Narrative (Details)

Loans - Narrative (Details) $ in Thousands	3 Months Ended		11 Months Ended
	Mar. 31, 2022USD ($)contract	Mar. 31, 2021USD ($)contract	Dec. 31, 2021USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Net deferred costs	$ 27,600		$ 31,000
Accrued interest receivable	15,500		14,700
Interest income from securities with no related allowance	800	$ 200
Allowance for credit loss on TDRs	$ 200	$ 200
Number of loans under trouble debt restructuring | contract	1	0
Amount of loans in default	$ 33
Interest income related to impaired loans with impairment measured on present value of expected future cash flows	5	$ 5
Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Remaining fair value adjustment for loans acquired	$ 24,100		$ 23,100
Percentage of fair value adjustment for loans acquired	1.90%		2.30%
Portfolio Loans | Paycheck Protection Program
Financing Receivable, Troubled Debt Restructuring [Line Items]
Net deferred fees	$ 1,000		$ 2,400

Loans - Past Due Financing Rece

Loans - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Loans	$ 6,451,217	$ 5,925,029
Nonaccrual	26,209	30,598
Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	1,133,884	868,418
Nonaccrual	2,729	3,454
PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	118,223	126,939
Nonaccrual	11,483	11,322
Current
Financing Receivable, Past Due [Line Items]
Loans	6,420,359	5,888,713
Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	1,130,873	864,410
Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	106,740	115,617
Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	3,876	5,190
Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	282	317
Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	733	407
Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	200
Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	40	121
Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	37
Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development
Financing Receivable, Past Due [Line Items]
Loans	259,421	230,824
Nonaccrual	232	259
Construction and land development | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	33,231	31,438
Nonaccrual	0	0
Construction and land development | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	41	45
Nonaccrual	4	5
Construction and land development | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	33,231	31,438
Construction and land development | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	37	40
Construction and land development | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction and land development | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	1,284,515	1,197,774
Nonaccrual	3,842	3,966
Commercial real estate - owner-occupied | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	273,498	186,812
Nonaccrual	0	0
Commercial real estate - owner-occupied | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	20,088	27,445
Nonaccrual	3,173	3,253
Commercial real estate - owner-occupied | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	273,498	186,652
Commercial real estate - owner-occupied | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	16,915	24,192
Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	160
Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - owner-occupied | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	1,966,150	1,736,439
Nonaccrual	4,782	5,905
Commercial real estate - non owner-occupied | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	488,400	382,554
Nonaccrual	1,225	1,044
Commercial real estate - non owner-occupied | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	77,480	75,705
Nonaccrual	3,224	3,263
Commercial real estate - non owner-occupied | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	487,175	381,510
Commercial real estate - non owner-occupied | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	74,256	72,442
Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	1,599,645	1,425,354
Nonaccrual	9,242	13,045
Residential real estate | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	214,401	156,957
Nonaccrual	1,193	1,794
Residential real estate | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	5,333	7,091
Nonaccrual	709	1,705
Residential real estate | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	213,208	154,981
Residential real estate | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	4,624	5,386
Residential real estate | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	182
Residential real estate | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Residential real estate | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial and financial
Financing Receivable, Past Due [Line Items]
Loans	1,132,506	1,069,356
Nonaccrual	7,750	6,869
Commercial and financial | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	110,161	84,395
Nonaccrual	74	175
Commercial and financial | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	15,281	16,643
Nonaccrual	4,373	3,096
Commercial and financial | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	109,805	84,180
Commercial and financial | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	10,908	13,547
Commercial and financial | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	282	0
Commercial and financial | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial and financial | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	40
Commercial and financial | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial and financial | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial and financial | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer
Financing Receivable, Past Due [Line Items]
Loans	169,724	174,175
Nonaccrual	361	554
Consumer | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	4,074	4,658
Nonaccrual	237	441
Consumer | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	10
Nonaccrual	0	0
Consumer | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	3,837	4,082
Consumer | Current | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	10
Consumer | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	135
Consumer | Accruing 30-59 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer | Accruing 60-89 Days Past Due | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Consumer | Accruing Greater Than 90 Days | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	39,256	91,107
Paycheck Protection Program | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	10,119	21,604
Nonaccrual	0	0
Paycheck Protection Program | PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program | Current | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	10,119	21,567
Paycheck Protection Program | Accruing 30-59 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program | Accruing 60-89 Days Past Due | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	0
Paycheck Protection Program | Accruing Greater Than 90 Days | Acquired Non-PCD Loans
Financing Receivable, Past Due [Line Items]
Loans	0	37
Portfolio Loans
Financing Receivable, Past Due [Line Items]
Loans	5,199,110	4,929,672
Nonaccrual	11,997	15,822
Portfolio Loans | Current
Financing Receivable, Past Due [Line Items]
Loans	5,182,746	4,908,686
Portfolio Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	3,594	4,873
Portfolio Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	733	207
Portfolio Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	40	84
Portfolio Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Loans	226,149	199,341
Nonaccrual	228	254
Portfolio Loans | Construction and land development | Current
Financing Receivable, Past Due [Line Items]
Loans	225,921	199,087
Portfolio Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	990,929	983,517
Nonaccrual	669	713
Portfolio Loans | Commercial real estate - owner-occupied | Current
Financing Receivable, Past Due [Line Items]
Loans	990,260	982,804
Portfolio Loans | Commercial real estate - owner-occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - owner-occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - owner-occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans	1,400,270	1,278,180
Nonaccrual	333	1,598
Portfolio Loans | Commercial real estate - non owner-occupied | Current
Financing Receivable, Past Due [Line Items]
Loans	1,399,902	1,276,582
Portfolio Loans | Commercial real estate - non owner-occupied | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	35	0
Portfolio Loans | Commercial real estate - non owner-occupied | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial real estate - non owner-occupied | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	1,379,911	1,261,306
Nonaccrual	7,340	9,546
Portfolio Loans | Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Loans	1,372,141	1,248,160
Portfolio Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	155	3,457
Portfolio Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	275	143
Portfolio Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Loans	1,007,064	968,318
Nonaccrual	3,303	3,598
Portfolio Loans | Commercial and financial | Current
Financing Receivable, Past Due [Line Items]
Loans	1,000,983	963,828
Portfolio Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	2,738	851
Portfolio Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	41
Portfolio Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	40	0
Portfolio Loans | Consumer
Financing Receivable, Past Due [Line Items]
Loans	165,650	169,507
Nonaccrual	124	113
Portfolio Loans | Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans	164,430	168,791
Portfolio Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	638	565
Portfolio Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	458	23
Portfolio Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	0	15
Portfolio Loans | Paycheck Protection Program
Financing Receivable, Past Due [Line Items]
Loans	29,137	69,503
Nonaccrual	0	0
Portfolio Loans | Paycheck Protection Program | Current
Financing Receivable, Past Due [Line Items]
Loans	29,109	69,434
Portfolio Loans | Paycheck Protection Program | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	28	0
Portfolio Loans | Paycheck Protection Program | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Portfolio Loans | Paycheck Protection Program | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Loans	$ 0	$ 69

Loans - Schedule of Nonaccrual

Loans - Schedule of Nonaccrual Loans by Loan Category (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans With No Related Allowance	$ 19,541	$ 22,566
Nonaccrual Loans With an Allowance	6,668	8,032
Total Nonaccrual Loans	26,209	30,598
Allowance for Credit Losses	2,796	3,804
Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans With No Related Allowance	12	37
Nonaccrual Loans With an Allowance	220	222
Total Nonaccrual Loans	232	259
Allowance for Credit Losses	89	92
Commercial real estate - owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans With No Related Allowance	2,871	2,976
Nonaccrual Loans With an Allowance	971	990
Total Nonaccrual Loans	3,842	3,966
Allowance for Credit Losses	380	419
Commercial real estate - non owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans With No Related Allowance	3,406	4,490
Nonaccrual Loans With an Allowance	1,376	1,415
Total Nonaccrual Loans	4,782	5,905
Allowance for Credit Losses	18	27
Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans With No Related Allowance	9,145	12,358
Nonaccrual Loans With an Allowance	97	687
Total Nonaccrual Loans	9,242	13,045
Allowance for Credit Losses	35	357
Commercial and financial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans With No Related Allowance	4,084	2,676
Nonaccrual Loans With an Allowance	3,666	4,193
Total Nonaccrual Loans	7,750	6,869
Allowance for Credit Losses	1,945	2,384
Consumer
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Loans With No Related Allowance	23	29
Nonaccrual Loans With an Allowance	338	525
Total Nonaccrual Loans	361	554
Allowance for Credit Losses	$ 329	$ 525

Loans - Schedule of Collateral

Loans - Schedule of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Total collateral dependent loans	$ 29,441	$ 35,716
Construction and land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Total collateral dependent loans	248	271
Commercial real estate - owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Total collateral dependent loans	4,581	4,706
Commercial real estate - non owner-occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Total collateral dependent loans	3,619	4,923
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total collateral dependent loans	12,482	16,334
Commercial and financial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total collateral dependent loans	8,033	8,741
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Total collateral dependent loans	$ 478	$ 741

Loans - Risk Categories of Loan

Loans - Risk Categories of Loans by Class of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	$ 322,796	$ 1,563,032
One year prior to current fiscal year	1,751,081	745,584
Two years prior to current fiscal year	768,351	751,942
Three years prior to current fiscal year	756,406	581,648
Four years prior to current fiscal year	551,150	423,022
Prior	1,571,242	1,181,217
Revolving	730,191	678,584
Total	6,451,217	5,925,029
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	322,796	1,562,502
One year prior to current fiscal year	1,750,126	716,570
Two years prior to current fiscal year	740,157	729,697
Three years prior to current fiscal year	732,595	549,567
Four years prior to current fiscal year	519,701	408,614
Prior	1,509,883	1,125,909
Revolving	723,635	672,256
Total	6,298,893	5,765,115
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	530
One year prior to current fiscal year	511	22,138
Two years prior to current fiscal year	21,463	6,645
Three years prior to current fiscal year	6,708	993
Four years prior to current fiscal year	927	925
Prior	14,362	18,430
Revolving	2,208	2,607
Total	46,179	52,268
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	437	5,487
Two years prior to current fiscal year	5,303	5,632
Three years prior to current fiscal year	7,825	26,800
Four years prior to current fiscal year	25,305	6,701
Prior	29,453	22,515
Revolving	1,015	648
Total	69,338	67,783
Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	7	1,389
Two years prior to current fiscal year	1,428	9,968
Three years prior to current fiscal year	9,278	4,288
Four years prior to current fiscal year	5,217	6,782
Prior	17,544	14,363
Revolving	3,333	3,073
Total	36,807	39,863
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	15,252	94,318
One year prior to current fiscal year	118,289	23,860
Two years prior to current fiscal year	22,227	38,058
Three years prior to current fiscal year	30,059	25,729
Four years prior to current fiscal year	16,441	3,995
Prior	16,766	15,515
Revolving	40,387	29,349
Total	259,421	230,824
Construction and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	15,252	94,318
One year prior to current fiscal year	118,289	23,860
Two years prior to current fiscal year	22,227	38,058
Three years prior to current fiscal year	30,059	25,507
Four years prior to current fiscal year	16,221	3,995
Prior	16,738	15,466
Revolving	40,387	29,349
Total	259,173	230,553
Construction and land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Construction and land development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	7	0
Revolving	0	0
Total	7	0
Construction and land development | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	222
Four years prior to current fiscal year	220	0
Prior	21	49
Revolving	0	0
Total	241	271
Construction and land development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Commercial real estate - owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	57,482	205,404
One year prior to current fiscal year	216,122	160,959
Two years prior to current fiscal year	168,302	187,898
Three years prior to current fiscal year	200,202	133,312
Four years prior to current fiscal year	129,090	129,867
Prior	501,538	370,329
Revolving	11,779	10,005
Total	1,284,515	1,197,774
Commercial real estate - owner-occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	57,482	205,404
One year prior to current fiscal year	216,122	154,432
Two years prior to current fiscal year	161,838	179,786
Three years prior to current fiscal year	192,208	132,353
Four years prior to current fiscal year	128,139	125,763
Prior	492,637	363,986
Revolving	11,429	10,005
Total	1,259,855	1,171,729
Commercial real estate - owner-occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	6,527
Two years prior to current fiscal year	6,464	5,370
Three years prior to current fiscal year	5,322	649
Four years prior to current fiscal year	641	218
Prior	1,528	3,250
Revolving	0	0
Total	13,955	16,014
Commercial real estate - owner-occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	3,290
Prior	5,359	1,610
Revolving	350	0
Total	5,709	4,900
Commercial real estate - owner-occupied | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	2,742
Three years prior to current fiscal year	2,672	310
Four years prior to current fiscal year	310	596
Prior	2,014	1,483
Revolving	0	0
Total	4,996	5,131
Commercial real estate - owner-occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Commercial real estate - non owner-occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	174,966	395,308
One year prior to current fiscal year	415,704	213,644
Two years prior to current fiscal year	233,724	303,723
Three years prior to current fiscal year	313,889	209,545
Four years prior to current fiscal year	209,509	113,505
Prior	610,795	494,237
Revolving	7,563	6,477
Total	1,966,150	1,736,439
Commercial real estate - non owner-occupied | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	174,966	395,308
One year prior to current fiscal year	415,704	207,824
Two years prior to current fiscal year	227,927	298,021
Three years prior to current fiscal year	305,852	186,339
Four years prior to current fiscal year	186,363	110,990
Prior	578,279	460,435
Revolving	7,563	6,477
Total	1,896,654	1,665,394
Commercial real estate - non owner-occupied | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	844
Three years prior to current fiscal year	837	0
Four years prior to current fiscal year	0	289
Prior	10,640	13,850
Revolving	0	0
Total	11,477	14,983
Commercial real estate - non owner-occupied | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	4,776
Two years prior to current fiscal year	4,753	3,009
Three years prior to current fiscal year	5,351	23,206
Four years prior to current fiscal year	23,146	1,900
Prior	19,242	17,266
Revolving	0	0
Total	52,492	50,157
Commercial real estate - non owner-occupied | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	1,044
Two years prior to current fiscal year	1,044	1,849
Three years prior to current fiscal year	1,849	0
Four years prior to current fiscal year	0	326
Prior	2,634	2,686
Revolving	0	0
Total	5,527	5,905
Commercial real estate - non owner-occupied | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	14,211	394,547
One year prior to current fiscal year	564,750	114,853
Two years prior to current fiscal year	121,445	91,290
Three years prior to current fiscal year	90,554	119,945
Four years prior to current fiscal year	110,519	123,029
Prior	323,950	224,122
Revolving	374,216	357,568
Total	1,599,645	1,425,354
Residential real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	14,211	394,547
One year prior to current fiscal year	564,750	114,364
Two years prior to current fiscal year	120,963	90,566
Three years prior to current fiscal year	90,420	119,836
Four years prior to current fiscal year	110,413	118,556
Prior	311,573	213,950
Revolving	370,928	354,439
Total	1,583,258	1,406,258
Residential real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	70
Four years prior to current fiscal year	13	0
Prior	1,120	1,243
Revolving	75	532
Total	1,208	1,845
Residential real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	340
Two years prior to current fiscal year	338	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	55	58
Prior	1,480	422
Revolving	201	86
Total	2,074	906
Residential real estate | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	149
Two years prior to current fiscal year	144	724
Three years prior to current fiscal year	134	39
Four years prior to current fiscal year	38	4,415
Prior	9,777	8,507
Revolving	3,012	2,511
Total	13,105	16,345
Residential real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Commercial and financial
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	51,836	341,356
One year prior to current fiscal year	351,527	196,831
Two years prior to current fiscal year	191,698	104,238
Three years prior to current fiscal year	98,036	75,757
Four years prior to current fiscal year	70,248	42,389
Prior	96,683	60,874
Revolving	272,478	247,911
Total	1,132,506	1,069,356
Commercial and financial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	51,836	340,826
One year prior to current fiscal year	351,023	180,677
Two years prior to current fiscal year	176,311	97,072
Three years prior to current fiscal year	90,587	68,232
Four years prior to current fiscal year	63,294	39,331
Prior	89,736	56,053
Revolving	271,721	246,568
Total	1,094,508	1,028,759
Commercial and financial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	530
One year prior to current fiscal year	504	15,587
Two years prior to current fiscal year	14,956	0
Three years prior to current fiscal year	449	237
Four years prior to current fiscal year	235	251
Prior	637	84
Revolving	385	876
Total	17,166	17,565
Commercial and financial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	371
Two years prior to current fiscal year	212	2,605
Three years prior to current fiscal year	2,466	3,594
Four years prior to current fiscal year	2,104	1,436
Prior	3,365	3,217
Revolving	273	339
Total	8,420	11,562
Commercial and financial | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	196
Two years prior to current fiscal year	219	4,561
Three years prior to current fiscal year	4,534	3,694
Four years prior to current fiscal year	4,615	1,371
Prior	2,945	1,520
Revolving	99	128
Total	12,412	11,470
Commercial and financial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	9,049	45,063
One year prior to current fiscal year	47,385	31,366
Two years prior to current fiscal year	29,003	26,735
Three years prior to current fiscal year	23,666	17,360
Four years prior to current fiscal year	15,343	10,237
Prior	21,510	16,140
Revolving	23,768	27,274
Total	169,724	174,175
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	9,049	45,063
One year prior to current fiscal year	46,934	31,342
Two years prior to current fiscal year	28,939	26,194
Three years prior to current fiscal year	23,469	17,300
Four years prior to current fiscal year	15,271	9,979
Prior	20,920	16,019
Revolving	21,607	25,418
Total	166,189	171,315
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	7	24
Two years prior to current fiscal year	43	431
Three years prior to current fiscal year	100	37
Four years prior to current fiscal year	38	167
Prior	437	3
Revolving	1,748	1,199
Total	2,373	1,861
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	437	0
Two years prior to current fiscal year	0	18
Three years prior to current fiscal year	8	0
Four years prior to current fiscal year	0	17
Prior	0	0
Revolving	191	223
Total	636	258
Consumer | Substandard Impaired
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	7	0
Two years prior to current fiscal year	21	92
Three years prior to current fiscal year	89	23
Four years prior to current fiscal year	34	74
Prior	153	118
Revolving	222	434
Total	526	741
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	0
One year prior to current fiscal year	0	0
Two years prior to current fiscal year	0	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	0	0
Paycheck Protection Program
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	87,036
One year prior to current fiscal year	37,304	4,071
Two years prior to current fiscal year	1,952	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	39,256	91,107
Paycheck Protection Program | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Current fiscal year	0	87,036
One year prior to current fiscal year	37,304	4,071
Two years prior to current fiscal year	1,952	0
Three years prior to current fiscal year	0	0
Four years prior to current fiscal year	0	0
Prior	0	0
Revolving	0	0
Total	$ 39,256	$ 91,107

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022USD ($)contract	Mar. 31, 2021USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	8	1
Pre-Modification Outstanding Recorded Investment	$ 840	$ 27
Post-Modification Outstanding Recorded Investment	$ 840	$ 27
Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0
Commercial real estate - owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0
Commercial real estate - non owner-occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0
Residential real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	3	1
Pre-Modification Outstanding Recorded Investment	$ 785	$ 27
Post-Modification Outstanding Recorded Investment	$ 785	$ 27
Commercial and financial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	1	0
Pre-Modification Outstanding Recorded Investment	$ 33	$ 0
Post-Modification Outstanding Recorded Investment	$ 33	$ 0
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts | contract	4	0
Pre-Modification Outstanding Recorded Investment	$ 22	$ 0
Post-Modification Outstanding Recorded Investment	$ 22	$ 0

Allowance for Credit Losses - A

Allowance for Credit Losses - Activity in Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 83,315	$ 92,733
Initial Allowance on PCD Loans Acquired During the Period	51
Provision for Credit Losses	6,556	(5,715)
Charge- Offs	(665)	(941)
Recoveries	586	571
TDR Allowance Adjustments	(5)	(5)
Ending Balance	89,838	86,643
Construction and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,751	4,920
Initial Allowance on PCD Loans Acquired During the Period	0
Provision for Credit Losses	(493)	(510)
Charge- Offs	0	0
Recoveries	10	18
TDR Allowance Adjustments	0	0
Ending Balance	2,268	4,428
Commercial real estate - owner-occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	8,579	9,868
Initial Allowance on PCD Loans Acquired During the Period	0
Provision for Credit Losses	715	(76)
Charge- Offs	0	0
Recoveries	0	0
TDR Allowance Adjustments	0	0
Ending Balance	9,294	9,792
Commercial real estate - non owner-occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	36,617	38,266
Initial Allowance on PCD Loans Acquired During the Period	31
Provision for Credit Losses	7,274	(2,038)
Charge- Offs	0	0
Recoveries	0	1
TDR Allowance Adjustments	0	0
Ending Balance	43,922	36,229
Residential real estate
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	12,811	17,500
Initial Allowance on PCD Loans Acquired During the Period	17
Provision for Credit Losses	1,060	(3,372)
Charge- Offs	(1)	0
Recoveries	191	229
TDR Allowance Adjustments	(3)	(4)
Ending Balance	14,075	14,353
Commercial and financial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	19,744	18,690
Initial Allowance on PCD Loans Acquired During the Period	3
Provision for Credit Losses	(1,628)	775
Charge- Offs	(569)	(756)
Recoveries	177	207
TDR Allowance Adjustments	0	0
Ending Balance	17,727	18,916
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,813	3,489
Initial Allowance on PCD Loans Acquired During the Period	0
Provision for Credit Losses	(372)	(494)
Charge- Offs	(95)	(185)
Recoveries	208	116
TDR Allowance Adjustments	(2)	(1)
Ending Balance	2,552	2,925
Paycheck Protection Program
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	0	0
Initial Allowance on PCD Loans Acquired During the Period	0
Provision for Credit Losses	0	0
Charge- Offs	0	0
Recoveries	0	0
TDR Allowance Adjustments	0	0
Ending Balance	$ 0	$ 0

Allowance for Credit Losses - S

Allowance for Credit Losses - Schedule of Loan Portfolio, Excluding PCI Loans and Related Allowance (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Recorded Investment
Individually Evaluated	$ 37,637	$ 39,863
Collectively Evaluated	6,413,580	5,885,166
Total	6,451,217	5,925,029
Associated Allowance
Individually Evaluated	4,560	4,754
Collectively Evaluated	85,278	78,561
Total	89,838	83,315	$ 86,643	$ 92,733
Construction and land development
Recorded Investment
Individually Evaluated	248	271
Collectively Evaluated	259,173	230,553
Total	259,421	230,824
Associated Allowance
Individually Evaluated	89	92
Collectively Evaluated	2,179	2,659
Total	2,268	2,751	4,428	4,920
Commercial real estate - owner-occupied
Recorded Investment
Individually Evaluated	4,996	5,131
Collectively Evaluated	1,279,519	1,192,643
Total	1,284,515	1,197,774
Associated Allowance
Individually Evaluated	380	419
Collectively Evaluated	8,914	8,160
Total	9,294	8,579	9,792	9,868
Commercial real estate - non owner-occupied
Recorded Investment
Individually Evaluated	5,527	5,905
Collectively Evaluated	1,960,623	1,730,534
Total	1,966,150	1,736,439
Associated Allowance
Individually Evaluated	787	27
Collectively Evaluated	43,135	36,590
Total	43,922	36,617	36,229	38,266
Residential real estate
Recorded Investment
Individually Evaluated	13,154	16,345
Collectively Evaluated	1,586,491	1,409,009
Total	1,599,645	1,425,354
Associated Allowance
Individually Evaluated	312	646
Collectively Evaluated	13,763	12,165
Total	14,075	12,811	14,353	17,500
Commercial and financial
Recorded Investment
Individually Evaluated	13,172	11,470
Collectively Evaluated	1,119,334	1,057,886
Total	1,132,506	1,069,356
Associated Allowance
Individually Evaluated	2,511	2,885
Collectively Evaluated	15,216	16,859
Total	17,727	19,744	18,916	18,690
Consumer
Recorded Investment
Individually Evaluated	540	741
Collectively Evaluated	169,184	173,434
Total	169,724	174,175
Associated Allowance
Individually Evaluated	481	685
Collectively Evaluated	2,071	2,128
Total	2,552	2,813	2,925	3,489
Paycheck Protection Program
Recorded Investment
Individually Evaluated	0	0
Collectively Evaluated	39,256	91,107
Total	39,256	91,107
Associated Allowance
Individually Evaluated	0	0
Collectively Evaluated	0	0
Total	$ 0	$ 0	$ 0	$ 0

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022USD ($)contract	Dec. 31, 2021USD ($)
Derivative [Line Items]
Loss recognized in OCI	$ 200
Reclassification from AOCI into income	100
Back-to-Back Swap
Derivative [Line Items]
Notional amount	$ 209,904	$ 175,392
Weighted average maturity (in years)	6 years 6 months	6 years 8 months 12 days
Back-to-Back Swap | Other Assets and Other Liabilities
Derivative [Line Items]
Fair value of derivative assets and liabilities	$ 8,923	$ 8,022
Interest Rate Floor
Derivative [Line Items]
Notional amount	$ 300,000	300,000
Number of derivative contracts | contract	2
Amount expected to be reclassified from accumulated other comprehensive income into interest income	$ 400
Interest Rate Floor | Other Assets
Derivative [Line Items]
Fair value of derivative assets and liabilities	122	290
Fair value of derivative assets	100	$ 300
Interest Rate Floor, October 2023 Maturity
Derivative [Line Items]
Notional amount	150,000
Interest Rate Floor, November 2023 Maturity
Derivative [Line Items]
Notional amount	$ 150,000

Derivatives - Schedule of Deriv

Derivatives - Schedule of Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Back-to-back swaps
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	$ 209,904	$ 175,392
Back-to-back swaps | Other Assets and Other Liabilities
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivative assets and liabilities	8,923	8,022
Interest rate floors
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	300,000	300,000
Interest rate floors | Other Assets
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of derivative assets and liabilities	$ 122	$ 290

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase - Schedule of Securities Sold Under Agreements to Repurchase and Securities Pledged (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value | Repurchase Agreement | Mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities | Asset Pledged as Collateral
Fair value of pledged securities - overnight and continuous:
Fair value of debt securities pledged as collateral	$ 152,817	$ 134,577

Equity Capital (Details)

Equity Capital (Details)	Mar. 31, 2022
Equity [Abstract]
Regulatory threshold percentage for well-capitalized institutions	0.065

Fair Value - Fair Value of Asse

Fair Value - Fair Value of Assets Measured on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financial Assets
Available-for-sale debt securities	$ 1,706,619	$ 1,644,319
Loans held for sale	20,615	31,791
Other real estate owned	11,567	13,618
Fair Value, Measurements, Recurring
Financial Assets
Available-for-sale debt securities	1,706,619	1,644,319
Derivative financial instruments	9,045	8,312
Loans held for sale	20,615	31,791
Equity securities	8,864	9,316
Financial Liabilities
Derivative financial instruments	8,923	8,022
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets
Available-for-sale debt securities	191	197
Derivative financial instruments	0	0
Loans held for sale	0	0
Equity securities	8,864	9,316
Financial Liabilities
Derivative financial instruments	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Financial Assets
Available-for-sale debt securities	1,706,428	1,644,122
Derivative financial instruments	9,045	8,312
Loans held for sale	20,615	31,791
Equity securities	0	0
Financial Liabilities
Derivative financial instruments	8,923	8,022
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Financial Assets
Available-for-sale debt securities	0	0
Derivative financial instruments	0	0
Loans held for sale	0	0
Equity securities	0	0
Financial Liabilities
Derivative financial instruments	0	0
Fair Value, Measurements, Nonrecurring
Financial Assets
Loans	8,395	8,443
Other real estate owned	11,567	13,618
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets
Loans	0	0
Other real estate owned	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Financial Assets
Loans	1,517	1,558
Other real estate owned	2,420	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Financial Assets
Loans	6,878	6,885
Other real estate owned	$ 9,147	$ 13,618

Fair Value - Aggregate Fair Val

Fair Value - Aggregate Fair Value and Contractual Balance of Loans for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Value of loans held for sale	$ 20,615	$ 31,791
Excess	528	828
Contractual Balance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Value of loans held for sale	$ 20,087	$ 30,963

Fair Value - Narrative (Details

Fair Value - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Average capitalization rate	7.00%
Collateral-Dependent Real Estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired loans	$ 12.7	$ 13.1
Specific reserve on collateral dependent loans	$ 4.3	$ 4.7

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Fair Value of Other Significant Financial Instruments Not Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financial Assets
Debt securities held-to-maturity	$ 747,004	$ 638,640
Time deposits with other banks	5,975	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets
Debt securities held-to-maturity	0	0
Time deposits with other banks	0
Loans, net	0	0
Financial Liabilities
Deposit liabilities	0	0
Subordinated debt	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Financial Assets
Debt securities held-to-maturity	709,492	627,398
Time deposits with other banks	5,933
Loans, net	0	0
Financial Liabilities
Deposit liabilities	0	0
Subordinated debt	69,416	69,348
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Financial Assets
Debt securities held-to-maturity	0	0
Time deposits with other banks	0
Loans, net	6,423,158	5,907,447
Financial Liabilities
Deposit liabilities	9,238,260	8,067,995
Subordinated debt	0	0
Carrying Value | Fair Value, Measurements, Recurring
Financial Assets
Debt securities held-to-maturity	747,004	638,640
Time deposits with other banks	5,975
Loans, net	6,352,984	5,833,271
Financial Liabilities
Deposit liabilities	9,243,768	8,067,589
Subordinated debt	$ 71,716	$ 71,646

Business Combinations - Narrati

Business Combinations - Narrative (Details)	Jan. 03, 2022USD ($)branch$ / sharesshares	Aug. 06, 2021USD ($)branch$ / sharesshares	Mar. 31, 2022USD ($)branch	Dec. 31, 2021USD ($)	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Business Acquisition [Line Items]
Initial allowance for credit losses			$ 89,838,000	$ 83,315,000	$ 86,643,000	$ 92,733,000
Apollo Bancshares, Inc.
Business Acquisition [Line Items]
Number of branches operated | branch			5
Deposits to be acquired in acquisition			$ 947,000,000
Loans to be acquired in acquisition			$ 705,000,000
Business Bank of Florida
Business Acquisition [Line Items]
Number of branches operated | branch	1
Percentage of common stock acquired	100.00%
Common stock portion, number of Seacoast stock for each share of stock converted (in shares)	0.7997
Goodwill recognized from acquisition, nondeductible	$ 8,000,000
Initial allowance for credit losses	1,800,000
Deposits to be acquired in acquisition	166,326,000
Loans to be acquired in acquisition	$ 121,774,000
Business Bank of Florida | Stock Option | Seacoast 2021 Incentive Plan
Business Acquisition [Line Items]
Shares granted (in shares) | shares	52,432
Weighted-average exercise price, granted (in dollars per share) | $ / shares	$ 26.63
Fair value of options converted	$ 500,000
Business Bank of Florida | PCD Loans
Business Acquisition [Line Items]
Initial allowance for credit losses	15,000
Loans to be acquired in acquisition	651,000
Business Bank of Florida | Acquired Non-PCD Loans
Business Acquisition [Line Items]
Initial allowance for credit losses	$ 1,800,000
Sabal Palm Bancorp, Inc.
Business Acquisition [Line Items]
Number of branches operated | branch	3
Percentage of common stock acquired	100.00%
Common stock portion, number of Seacoast stock for each share of stock converted (in shares)	0.2203
Goodwill recognized from acquisition, nondeductible	$ 26,500,000
Fair value of options converted	3,336,000
Initial allowance for credit losses	3,400,000
Deposits to be acquired in acquisition	395,952,000
Loans to be acquired in acquisition	$ 246,152,000
Sabal Palm Bancorp, Inc. | Stock Option | Seacoast 2021 Incentive Plan
Business Acquisition [Line Items]
Shares granted (in shares) | shares	188,253
Weighted-average exercise price, granted (in dollars per share) | $ / shares	$ 17.84
Fair value of options converted	$ 3,300,000
Sabal Palm Bancorp, Inc. | PCD Loans
Business Acquisition [Line Items]
Initial allowance for credit losses	37,000
Loans to be acquired in acquisition	3,003,000
Sabal Palm Bancorp, Inc. | Acquired Non-PCD Loans
Business Acquisition [Line Items]
Initial allowance for credit losses	$ 3,400,000
Legacy Bank of Florida
Business Acquisition [Line Items]
Number of branches operated | branch		5
Percentage of common stock acquired		100.00%
Common stock portion, number of Seacoast stock for each share of stock converted (in shares)	0.7997	0.1703
Goodwill recognized from acquisition, nondeductible		$ 31,000,000
Fair value of options converted	$ 497,000	4,736,000
Initial allowance for credit losses		11,200,000
Deposits to be acquired in acquisition		494,921,000
Loans to be acquired in acquisition		$ 477,215,000
Legacy Bank of Florida | Stock Option | Seacoast 2021 Incentive Plan
Business Acquisition [Line Items]
Shares granted (in shares) | shares		356,497
Weighted-average exercise price, granted (in dollars per share) | $ / shares		$ 16.70
Fair value of options converted		$ 4,700,000
Share-based compensation expense				$ 900,000
Legacy Bank of Florida | PCD Loans
Business Acquisition [Line Items]
Initial allowance for credit losses		3,000,000
Loans to be acquired in acquisition		62,589,000
Legacy Bank of Florida | Acquired Non-PCD Loans
Business Acquisition [Line Items]
Initial allowance for credit losses		$ 8,200,000

Business Combinations - Purchas

Business Combinations - Purchase Price (Details) $ / shares in Units, $ in Thousands	Jan. 03, 2022USD ($)$ / sharesshares	Aug. 06, 2021USD ($)$ / sharesshares
Business Bank of Florida
Business Acquisition [Line Items]
Per share exchange ratio (in shares)	0.7997
Sabal Palm Bancorp, Inc.
Business Acquisition [Line Items]
Number of common shares outstanding (in shares) | shares	7,536,000
Per share exchange ratio (in shares)	0.2203
Number of shares of common stock issued (in shares) | shares	1,660,000
Multiplied by common stock price per share (in dollars per share) | $ / shares	$ 35.39
Value of common stock issued	$ 58,762
Fair value of options converted	3,336
Total purchase price	$ 62,098
Legacy Bank of Florida
Business Acquisition [Line Items]
Number of common shares outstanding (in shares) | shares	1,112,000	15,778,000
Per share exchange ratio (in shares)	0.7997	0.1703
Number of shares of common stock issued (in shares) | shares	889,000	2,687,000
Multiplied by common stock price per share (in dollars per share) | $ / shares	$ 35.39	$ 32.19
Value of common stock issued	$ 31,480	$ 86,487
Cash paid for fractional shares		7
Fair value of options converted	497	4,736
Total purchase price	$ 31,977	$ 91,230

Business Combinations - Fair Va

Business Combinations - Fair Value of the Assets Purchased, Including Goodwill and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jan. 03, 2022	Dec. 31, 2021	Aug. 06, 2021
Assets:
Goodwill	$ 286,606		$ 252,154
Business Bank of Florida
Assets:
Cash		$ 38,332
Investments		26,011
Loans		121,774
Bank premises and equipment		2,102
Core deposit intangibles		2,621
Goodwill		7,962
Total assets		198,802
Liabilities:
Deposits		166,326
Other liabilities		499
Total liabilities		166,825
Sabal Palm Bancorp, Inc.
Assets:
Cash		170,609
Investments		6,473
Loans		246,152
Bank premises and equipment		1,745
Core deposit intangibles		5,587
Goodwill		26,489
Other assets		5,189
Total assets		462,244
Liabilities:
Deposits		395,952
Other liabilities		4,194
Total liabilities		$ 400,146
Legacy Bank of Florida
Assets:
Cash				$ 98,107
Investments				992
Loans				477,215
Bank premises and equipment				2,577
Core deposit intangibles				3,454
Goodwill				30,978
Other assets				15,532
Total assets				628,855
Liabilities:
Deposits				494,921
Other liabilities				42,705
Total liabilities				$ 537,626

Business Combinations - Fair _2

Business Combinations - Fair Value of Acquired Loans (Details) - USD ($) $ in Thousands	Jan. 03, 2022	Aug. 06, 2021
Business Bank of Florida
Business Acquisition [Line Items]
Book Balance	$ 123,916
Fair Value	121,774
Business Bank of Florida | Construction and land development
Business Acquisition [Line Items]
Book Balance	8,677
Fair Value	8,414
Business Bank of Florida | Commercial real estate - owner-occupied
Business Acquisition [Line Items]
Book Balance	45,403
Fair Value	44,564
Business Bank of Florida | Commercial real estate - non owner-occupied
Business Acquisition [Line Items]
Book Balance	53,065
Fair Value	52,034
Business Bank of Florida | Residential real estate
Business Acquisition [Line Items]
Book Balance	5,377
Fair Value	5,421
Business Bank of Florida | Commercial and financial
Business Acquisition [Line Items]
Book Balance	9,376
Fair Value	9,321
Business Bank of Florida | Consumer
Business Acquisition [Line Items]
Book Balance	59
Fair Value	61
Business Bank of Florida | PPP loans
Business Acquisition [Line Items]
Book Balance	1,959
Fair Value	1,959
Sabal Palm Bancorp, Inc.
Business Acquisition [Line Items]
Book Balance	248,910
Fair Value	246,152
Sabal Palm Bancorp, Inc. | Construction and land development
Business Acquisition [Line Items]
Book Balance	9,256
Fair Value	9,009
Sabal Palm Bancorp, Inc. | Commercial real estate - owner-occupied
Business Acquisition [Line Items]
Book Balance	57,690
Fair Value	56,591
Sabal Palm Bancorp, Inc. | Commercial real estate - non owner-occupied
Business Acquisition [Line Items]
Book Balance	89,153
Fair Value	87,280
Sabal Palm Bancorp, Inc. | Residential real estate
Business Acquisition [Line Items]
Book Balance	71,469
Fair Value	72,227
Sabal Palm Bancorp, Inc. | Commercial and financial
Business Acquisition [Line Items]
Book Balance	17,797
Fair Value	17,501
Sabal Palm Bancorp, Inc. | Consumer
Business Acquisition [Line Items]
Book Balance	233
Fair Value	232
Sabal Palm Bancorp, Inc. | PPP loans
Business Acquisition [Line Items]
Book Balance	3,312
Fair Value	$ 3,312
Legacy Bank of Florida
Business Acquisition [Line Items]
Book Balance		$ 486,282
Fair Value		477,215
Legacy Bank of Florida | Construction and land development
Business Acquisition [Line Items]
Book Balance		37,558
Fair Value		36,651
Legacy Bank of Florida | Commercial real estate - owner-occupied
Business Acquisition [Line Items]
Book Balance		35,765
Fair Value		35,363
Legacy Bank of Florida | Commercial real estate - non owner-occupied
Business Acquisition [Line Items]
Book Balance		241,322
Fair Value		237,091
Legacy Bank of Florida | Residential real estate
Business Acquisition [Line Items]
Book Balance		71,118
Fair Value		70,541
Legacy Bank of Florida | Commercial and financial
Business Acquisition [Line Items]
Book Balance		61,274
Fair Value		58,324
Legacy Bank of Florida | Consumer
Business Acquisition [Line Items]
Book Balance		647
Fair Value		647
Legacy Bank of Florida | PPP loans
Business Acquisition [Line Items]
Book Balance		38,598
Fair Value		$ 38,598

Business Combinations - Purch_2

Business Combinations - Purchased Credit Impaired Loans (Details) - USD ($) $ in Thousands	Jan. 03, 2022	Aug. 06, 2021
Business Bank of Florida
Business Acquisition [Line Items]
Total PCD loans acquired	$ 121,774
Sabal Palm Bancorp, Inc.
Business Acquisition [Line Items]
Total PCD loans acquired	246,152
Legacy Bank of Florida
Business Acquisition [Line Items]
Total PCD loans acquired		$ 477,215
PCD Loans | Business Bank of Florida
Business Acquisition [Line Items]
Book balance of loans at acquisition	714
Allowance for credit losses at acquisition	(15)
Non-credit related discount	(48)
Total PCD loans acquired	651
PCD Loans | Sabal Palm Bancorp, Inc.
Business Acquisition [Line Items]
Book balance of loans at acquisition	3,703
Allowance for credit losses at acquisition	(37)
Non-credit related discount	(663)
Total PCD loans acquired	$ 3,003
PCD Loans | Legacy Bank of Florida
Business Acquisition [Line Items]
Book balance of loans at acquisition		66,371
Allowance for credit losses at acquisition		(3,046)
Non-credit related discount		(736)
Total PCD loans acquired		$ 62,589

Business Combinations - Pro-For

Business Combinations - Pro-Forma Information (Details) - Legacy Bank of Florida, Business Bank of Florida and Sabal Palm - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Business Acquisition, Pro Forma Information [Abstract]
Net interest income	$ 76,504	$ 78,107
Net income	$ 25,270	$ 38,097
EPS - basic (in dollars per share)	$ 0.41	$ 0.62
EPS - diluted (in dollars per share)	$ 0.41	$ 0.63

Subsequent Event (Details)

Subsequent Event (Details) - Drummond Banking Company $ in Millions	3 Months Ended
	Mar. 31, 2022USD ($)branch
Subsequent Event [Line Items]
Number of branches operated | branch	18
Deposits	$ 932
Loans acquired in acquisition	$ 543