SouthState (SSB) 10-Q 5 May 23 2023 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2023	May 03, 2023
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2023
Entity File Number	001-12669
Entity Registrant Name	SOUTHSTATE CORP
Entity Incorporation, State or Country Code	SC
Entity Tax Identification Number	57-0799315
Entity Address, Address Line One	1101 First Street South, Suite 202
Entity Address, City or Town	Winter Haven
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33880
City Area Code	863
Local Phone Number	293-4710
Title of 12(b) Security	Common Stock
Trading Symbol	SSB
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		75,922,877
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000764038
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Cash and cash equivalents:
Cash and due from banks	$ 558,158	$ 548,387
Federal funds sold and interest-earning deposits with banks	1,215,766	580,491
Deposits in other financial institutions (restricted cash)	222,738	183,685
Total cash and cash equivalents	1,996,662	1,312,563
Trading securities, at fair value	16,039	31,263
Investment securities:
Securities held to maturity (fair value of $2,227,612 and $2,250,168)	2,636,673	2,683,241
Securities available for sale, at fair value	5,159,999	5,326,822
Other investments	217,991	179,717
Total investment securities	8,014,663	8,189,780
Loans held for sale	27,289	28,968
Loans:
Total loans	30,696,142	30,177,862
Less allowance for credit losses	(370,645)	(356,444)
Loans, net	30,325,497	29,821,418
Other real estate owned	3,473	1,023
Bank property held for sale	16,724	17,754
Premises and equipment, net	517,146	520,635
Bank owned life insurance ("BOLI")	967,750	964,708
Deferred tax assets	165,161	177,801
Derivatives assets	159,287	211,016
Mortgage servicing rights	85,406	86,610
Core deposit and other intangibles	109,603	116,450
Goodwill	1,923,106	1,923,106
Other assets	596,021	515,601
Total assets	44,923,827	43,918,696
Deposits:
Noninterest-bearing	12,422,583	13,168,656
Interest-bearing	23,979,009	23,181,967
Total deposits	36,401,592	36,350,623
Federal funds purchased	233,354	213,597
Securities sold under agreements to repurchase	310,754	342,820
Corporate and subordinated debentures	392,182	392,275
Other borrowings	900,000
Reserve for unfunded commitments	85,068	67,215
Derivative liabilities	806,584	1,034,143
Other liabilities	545,289	443,096
Total liabilities	39,674,823	38,843,769
Shareholders' equity:
Common stock - $2.50 par value; authorized 160,000,000 shares; 75,859,665 and 75,704,563 shares issued and outstanding, respectively	189,649	189,261
Surplus	4,224,503	4,215,712
Retained earnings	1,448,636	1,347,042
Accumulated other comprehensive loss	(613,784)	(677,088)
Total shareholders' equity	5,249,004	5,074,927
Total liabilities and shareholders' equity	44,923,827	43,918,696
Acquired - non-purchased credit deteriorated loans
Loans:
Total loans	5,620,290	5,943,092
Acquired - purchased credit deteriorated loans
Loans:
Total loans	1,325,400	1,429,731
Non-acquired loans
Loans:
Total loans	$ 23,750,452	$ 22,805,039

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment securities:
Securities held to maturity, fair value (in dollars)	$ 2,227,612	$ 2,250,168
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50
Common stock, shares authorized	160,000,000	160,000,000
Common stock, shares issued	75,859,665	75,704,563
Common stock, shares outstanding	75,859,665	75,704,563

Condensed Consolidated Statemen

Condensed Consolidated Statements of Net Income - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income:
Loans, including fees	$ 393,366,000	$ 233,617,000
Investment securities:
Taxable	41,565,000	30,120,000
Tax-exempt	6,557,000	3,875,000
Federal funds sold, securities purchased under agreements to resell and interest-bearing deposits with banks	8,921,000	2,859,000
Total interest income	450,409,000	270,471,000
Interest expense:
Deposits	55,942,000	4,591,000
Federal funds purchased and securities sold under agreements to repurchase	2,853,000	269,000
Corporate and subordinated debentures	5,735,000	4,093,000
Other borrowings	4,616,000
Total interest expense	69,146,000	8,953,000
Net interest income	381,263,000	261,518,000
Provision (recovery) for credit losses	33,091,000	(8,449,000)
Net interest income after provision (recovery) for credit losses	348,172,000	269,967,000
Noninterest income:
Securities gains, net	45,000
Other income	9,866,000	6,595,000
Total noninterest income	71,355,000	86,046,000
Noninterest expense:
Salaries and employee benefits	144,060,000	137,673,000
Occupancy expense	21,533,000	21,840,000
Information services expense	19,925,000	19,193,000
OREO and loan related expense (recovery)	169,000	(238,000)
Amortization of intangibles	7,299,000	8,494,000
Supplies, printing and postage expense	2,640,000	2,189,000
Professional fees	3,702,000	3,749,000
FDIC assessment and other regulatory charges	6,294,000	4,812,000
Advertising and marketing	2,118,000	1,763,000
Merger, branch consolidation and severance related expense	9,412,000	10,276,000
Other expense	23,353,000	18,849,000
Total noninterest expense	240,505,000	228,600,000
Earnings:
Income before provision for income taxes	179,022,000	127,413,000
Provision for income taxes	39,096,000	27,084,000
Net income	$ 139,926,000	$ 100,329,000
Earnings per common share:
Basic (in dollars per share)	$ 1.84	$ 1.40
Diluted (in dollars per share)	$ 1.83	$ 1.39
Weighted average common shares outstanding:
Basic (in shares)	75,902	71,447
Diluted (in shares)	76,389	72,111
Fees on deposit accounts
Noninterest income:
Noninterest income	$ 29,859,000	$ 28,009,000
Mortgage banking income
Noninterest income:
Noninterest income	4,332,000	10,594,000
Trust and investment services income
Noninterest income:
Noninterest income	9,937,000	9,718,000
Correspondent banking and capital market income
Noninterest income:
Noninterest income	13,594,000	27,950,000
SBA income
Noninterest income:
Noninterest income	$ 3,722,000	$ 3,180,000

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 139,926	$ 100,329
Unrealized holding gains (losses) on available for sale securities:
Unrealized holding gains (losses) arising during period	72,772	(362,120)
Tax effect	(9,501)	89,310
Reclassification adjustment for gains included in net income	45
Tax effect	(12)
Net of tax amount	63,304	(272,810)
Other comprehensive income (loss), net of tax	63,304	(272,810)
Comprehensive income (loss)	$ 203,230	$ (172,481)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock	Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2021	$ 173,331	$ 3,653,098	$ 997,657	$ (21,146)	$ 4,802,940
Balance (in shares) at Dec. 31, 2021	69,332,297
Increase (Decrease) in Stockholders' Equity
Net income			100,329		100,329
Other comprehensive income (loss), net of tax effects				(272,810)	(272,810)
Total comprehensive income (loss)					(172,481)
Cash dividends declared on common stock per share			(33,822)		(33,822)
Cash dividends equivalents paid on restricted stock units			(100)		(100)
Stock options exercised	$ 24	384			408
Stock options exercised (in shares)	9,703
Stock issued pursuant to restricted stock units	$ 321	(321)
Stock issued pursuant to restricted stock units (in shares)	128,302
Common stock repurchased - buyback plan	$ (2,530)	(83,928)			(86,458)
Common stock repurchased - buyback plan (in shares)	(1,012,038)
Common stock repurchased	$ (70)	(2,287)			(2,357)
Common stock repurchased (in shares)	(28,049)
Share-based compensation expense		8,486			8,486
Common stock issued for acquisition	$ 18,327	641,445			659,772
Common stock issued for acquisition (in shares)	7,330,803
Net fair value of unvested equity awards assumed in the Atlantic Capital acquisition		(1,980)			(1,980)
Balance at Mar. 31, 2022	$ 189,403	4,214,897	1,064,064	(293,956)	5,174,408
Balance (in shares) at Mar. 31, 2022	75,761,018
Balance at Dec. 31, 2022	$ 189,261	4,215,712	1,347,042	(677,088)	$ 5,074,927
Balance (in shares) at Dec. 31, 2022	75,704,563				75,704,563
Increase (Decrease) in Stockholders' Equity
Net income			139,926		$ 139,926
Other comprehensive income (loss), net of tax effects				63,304	63,304
Total comprehensive income (loss)					203,230
Cash dividends declared on common stock per share			(37,912)		(37,912)
Cash dividends equivalents paid on restricted stock units			(420)		(420)
Stock options exercised	$ 59	1,114			1,173
Stock options exercised (in shares)	23,516
Restricted stock awards	$ (5)	5
Restricted stock awards (in shares)	(2,233)
Stock issued pursuant to restricted stock units	$ 444	(444)
Stock issued pursuant to restricted stock units (in shares)	177,708
Common stock repurchased	$ (110)	(3,306)			(3,416)
Common stock repurchased (in shares)	(43,889)
Share-based compensation expense		11,422			11,422
Balance at Mar. 31, 2023	$ 189,649	$ 4,224,503	$ 1,448,636	$ (613,784)	$ 5,249,004
Balance (in shares) at Mar. 31, 2023	75,859,665				75,859,665

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares		3 Months Ended
	Apr. 27, 2023	Mar. 31, 2023	Mar. 31, 2022
Condensed Consolidated Statements of Changes in Shareholders' Equity
Common stock cash dividends declared, per share (in dollars per share)	$ 0.50	$ 0.50	$ 0.49

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 139,926	$ 100,329
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,015	16,178
(Recovery) provision for credit losses	33,091	(8,449)
Deferred income taxes	3,127	49,073
Gains on sale of securities, net	(45)
Share-based compensation expense	11,422	8,486
Accretion of discount related to acquired loans	(7,398)	(6,741)
(Gains) losses on disposal of premises and equipment	(65)	812
Gains on sale of bank properties held for sale and repossessed real estate	(514)	(624)
Net amortization of premiums on investment securities	5,358	7,767
Bank properties held for sale and repossessed real estate write downs	410	195
Fair value adjustment for loans held for sale	9	6,026
Originations and purchases of loans held for sale	(157,683)	(645,339)
Proceeds from sales of loans held for sale	160,808	702,505
Gains on sales of loans held for sale	(1,456)	(1,845)
Increase in cash surrender value of BOLI	(5,906)	(5,260)
Net change in:
Accrued interest receivable	(3,921)	(4,630)
Prepaid assets	2,406	3,309
Operating leases	72	33
Bank owned life insurance	(930)
Trading securities	15,225	3,455
Derivative assets	51,729	290,886
Miscellaneous other assets	(115,557)	(75,613)
Accrued interest payable	14,193	3,035
Accrued income taxes	36,423	(20,188)
Derivative liabilities	(227,559)	119,608
Miscellaneous other liabilities	91,201	35,761
Net cash provided by operating activities	59,381	578,769
Cash flows from investing activities:
Proceeds from sales of investment securities available for sale	125,298	414,438
Proceeds from maturities and calls of investment securities held to maturity	45,308	40,152
Proceeds from maturities and calls of investment securities available for sale	110,287	158,642
Proceeds from sales and redemptions of other investment securities	25,500	13,216
Purchases of investment securities available for sale		(980,298)
Purchases of investment securities held to maturity		(1,049,722)
Purchases of other investment securities	(63,773)	(19,890)
Net increase in loans	(518,335)	(243,652)
Net cash received from acquisitions		250,115
Recoveries of loans previously charged off	3,589	3,168
Purchase of bank owned life insurance		(80,000)
Purchases of premises and equipment	(7,642)	(4,983)
Proceeds from redemption and payout of bank owned life insurance policies	3,794
Proceeds from sale of bank properties held for sale and repossessed real estate	1,511	5,449
Proceeds from sale of premises and equipment	616	453
Net cash used in investing activities	(273,847)	(1,492,912)
Cash flows from financing activities:
Net increase in deposits	51,450	518,522
Net decrease in federal funds purchased and securities sold under agreements to repurchase and other short-term borrowings	(12,309)	(10,830)
Proceeds from FHLB borrowings	2,150,000
Repayment of FHLB borrowings	(1,250,000)
Common stock repurchases	(3,416)	(88,815)
Dividends paid	(38,333)	(33,922)
Stock options exercised	1,173	408
Net cash provided by financing activities	898,565	385,363
Net (decrease) increase in cash and cash equivalents	684,099	(528,780)
Cash and cash equivalents at beginning of period	1,312,563	6,721,571
Cash and cash equivalents at end of period	1,996,662	6,192,791
Cash paid for:
Interest	54,953	5,956
Income taxes	2,400	1,231
Recognition of operating lease assets in exchange for lease liabilities		12,428
Acquisitions:
Fair value of tangible assets acquired		3,499,774
Other intangible assets acquired		20,791
Liabilities assumed		3,205,694
Net identifiable assets acquired over liabilities assumed		342,939
Common stock issued in acquisition		659,772
Real estate acquired in full or in partial settlement of loans	$ 2,826	$ 1,151

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2023
Basis of Presentation
Basis of Presentation	Note 1 — Basis of Presentation ​ The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America, otherwise referred to as GAAP, for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and disclosures required 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 information has been reclassified to conform to the current period presentation, and these reclassifications had no impact on net income or equity as previously reported. Operating results for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023. ​ The condensed consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements at that date but does not include all of the information and disclosures required by GAAP for complete financial statements.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2023
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	Note 2 — Summary of Significant Accounting Policies ​ The information contained in the consolidated financial statements and accompanying notes included in our Annual Report on Form 10-K for the year ended December 31, 2022, as filed with the Securities and Exchange Commission (the “SEC”) on February 24, 2023, should be referenced when reading these unaudited condensed consolidated financial statements. Unless otherwise mentioned or unless the context requires otherwise, references herein to “SouthState,” the “Company” “we,” “us,” “our” or similar references mean SouthState Corporation and its consolidated subsidiaries. References to the “Bank” or “SouthState Bank” means SouthState Corporation’s wholly owned subsidiary, South State Bank, National Association, a national banking association. ​ Loans ​ Loans that management has originated and has the intent and ability to hold for the foreseeable future or until maturity or pay off generally are reported at their unpaid principal balances, less unearned income and net of any deferred loan fees and costs, including unamortized fair value discount or premium. Unearned income on installment loans is recognized as income over the terms of the loans by methods that generally approximate the interest method. Interest on other loans is calculated by using the simple interest method on daily balances of the principal amount outstanding. If the loan is prepaid, the remaining unamortized fees and costs are charged or credited to interest income. Amortization ceases for non-accrual loans. ​ We place non acquired loans and acquired loans on nonaccrual once reasonable doubt exists about the collectability of all principal and interest due. Generally, this occurs when principal or interest is 90 days or more past due, unless the loan is well secured and in the process of collection, and excludes factored receivables. For factored receivables, which are commercial trade credits rather than promissory notes, the Company’s practice, in most cases, is to charge-off unpaid recourse receivables when they become 90 days past due from the invoice due date and the non-recourse receivables when they become 120 days past due from the statement due date. Past due status is based on the contractual terms of the loan. In all cases, loans are placed on non-accrual or charged-off at an earlier date if collection of principal or interest is considered doubtful. ​ A loan is evaluated individually for loss when it is on nonaccrual and has a net book balance over $1 million. Large pools of homogeneous loans are collectively evaluated for loss and reserved at the pool level. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as nonaccrual, provided that management expects to collect all amounts due, including interest accrued at the contractual interest rate for the period of delay. ​ ​ Allowance for Credit Losses (“ACL”) – Investment Securities Management uses a systematic methodology to determine its ACL for investment securities held to maturity. The ACL is a valuation account that is deducted from the amortized cost basis to present the net amount expected to be collected on the held to maturity portfolio. Management considers the effects of past events, current conditions, and reasonable and supportable forecasts on the collectability of the held to maturity investment portfolio. The Company’s estimate of its ACL involves a high degree of judgment; therefore, management’s process for determining expected credit losses may result in a range of expected credit losses. Management monitors the held to maturity portfolio to determine whether a valuation account should be recorded. As of March 31, 2023 and December 31, 2022, the Company had The Company follows its nonaccrual policy by reversing interest income in the income statement when the Company determines the interest for held to maturity securities is uncollectible. Therefore, management excludes the accrued interest receivable balance from the amortized cost basis in measuring expected credit losses on the investment securities and does not record an allowance for credit losses on accrued interest receivable. As of March 31, 2023 and December 31, 2022, the accrued interest receivables for all investment securities recorded in Other Assets were Each quarter, management evaluates impairment where there has been a decline in fair value below the amortized cost basis of a security to determine whether there is a credit loss associated with the decline in fair value. Management considers the nature of the collateral, potential future changes in collateral values, default rates, delinquency rates, third-party guarantees, credit ratings, interest rate changes since purchase, volatility of the security’s fair value and historical loss information for financial assets secured with similar collateral among other factors. Credit losses are calculated individually, rather than collectively, using a discounted cash flow method, whereby management compares the present value of expected cash flows with the amortized cost basis of the security. The credit loss component would be recognized through the Provision for Credit Losses in the Condensed Consolidated Statements of Net Income. ACL – Loans and Certain Off-Balance-Sheet Credit Exposures The ACL for loans held for investment reflects management’s estimate of credit losses that will result from the inability of our borrowers to make required loan payments. The Company makes adjustments to the ACL by recording a provision for or recovery of credit losses through earnings. Loans charged off are recorded as reductions to the ACL on the balance sheet and subsequent recoveries ​ Management uses systematic methodologies to determine its ACL for loans held for investment and certain off-balance-sheet credit exposures. The ACL is a valuation account that is deducted from the amortized cost basis to present the net amount expected to be collected on the loan portfolio. Management considers the effects of past events, current conditions, and reasonable and supportable forecasts on the collectability of the loan portfolio. The Company’s estimate of its ACL involves a high degree of judgment; therefore, management’s process for determining expected credit losses may result in a range of expected credit losses. The Company’s ACL recorded in the balance sheet reflects management’s best estimate within the range of expected credit losses. The Company recognizes in net income the amount needed to adjust the ACL for management’s current estimate of expected credit losses. ​ The Company’s ACL is calculated using collectively evaluated and individually evaluated loans. The ACL is measured on a collective pool basis when similar risk characteristics exist. Loans with similar risk characteristics are grouped into homogenous segments, or pools, for analysis. The Discounted Cash Flow (“DCF”) method is used for each loan in a pool, and the results are aggregated at the pool level. A periodic tendency to default and absolute loss given default are applied to a projective model of the loan’s cash flow while considering prepayment and principal curtailment effects. The analysis produces expected cash flows for each instrument in the pool by pairing loan-level term information (e.g., maturity date, payment amount, interest rate, etc.) with top-down pool assumptions (e.g., default rates and prepayment speeds). The Company has identified the following portfolio segments: Owner-Occupied Commercial Real Estate, Non-Owner Occupied Commercial Real Estate, Multifamily, Municipal, Commercial and Industrial, Commercial Construction and Land Development, Residential Construction, Residential Senior Mortgage, Residential Junior Mortgage, Revolving Mortgage, and Consumer and Other. ​ In determining the proper level of the ACL, management has determined that the loss experience of the Bank provides the best basis for its assessment of expected credit losses. The Company therefore used its own historical credit loss experience by each loan segment over an economic cycle, while excluding loss experience from certain acquired institutions (i.e., failed banks). For most of the segment models for collectively evaluated loans, the Company incorporated two or more macroeconomic drivers using a statistical regression modeling methodology. ​ Management considers forward-looking information in estimating expected credit losses. The Company subscribes to a third-party service which provides their quarterly macroeconomic baseline scenario and alternative scenarios for the United States economy. The baseline, along with the evaluation of alternative scenarios, is used by management to determine the best estimate within the range of expected credit losses. Management has evaluated the appropriateness of the reasonable and supportable forecast scenarios and has made adjustments as needed. For the contractual term that extends beyond the reasonable and supportable forecast period, the Company reverts to the long term mean of historical factors within four quarters using a straight-line approach. The Company generally uses a four-quarter forecast and a four-quarter reversion period. ​ Included in its systematic methodology to determine its ACL, management considers the need to qualitatively adjust expected credit losses for information not already captured in the loss estimation process. These qualitative adjustments either increase or decrease the quantitative model estimation (i.e., formulaic model results). Each period, the Company considers qualitative factors that are relevant within the qualitative framework that includes the following: 1) Lending Policy; 2) Economic conditions not captured in models; 3) Volume and Mix of Loan Portfolio; 4) Past Due Trends; 5) Concentration Risk; 6) External Factors; and 7) Model Limitations. ​ When a loan no longer shares similar risk characteristics with its segment, the asset is assessed to determine whether it should be included in another pool or should be individually evaluated. The Company’s threshold for individually evaluated loans includes all non-accrual loans with a net book balance in excess of million. Management will monitor the credit environment and make adjustments to this threshold in the future if warranted. Based on the threshold above, consumer financial assets will generally remain in pools unless they meet the dollar threshold. The expected credit losses on individually evaluated loans will be estimated based on discounted cash flow analysis unless the loan meets the criteria for use of the fair value of collateral, either by virtue of an expected foreclosure or through meeting the definition of collateral-dependent. Financial assets that have been individually evaluated can be returned to a pool for purposes of estimating the expected credit loss insofar as their credit profile improves and that the repayment terms were not considered to be unique to the asset. ​ Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures , prospectively that requires the elimination of TDR guidance. Management measures expected credit losses over the contractual term of a loan. When determining the contractual term, the Company considers expected prepayments but is precluded from considering expected extensions, renewals, or modifications. Longstanding TDR accounting rules were replaced as of January 1, 2023 with ASU No. 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures (See Note 3 Recent Accounting Pronouncements). In accordance with the adoption of ASU 2022-02, any loans modified to a borrower experiencing financial difficulty are reviewed by the Bank to determine if an interest rate reduction, a term extension, an other-than-insignificant payment delay, a principal forgiveness, or any combination of these has occurred. ​ Effective January 1, 2023, the ACL includes expected losses from modifications of receivables to borrowers experiencing financial difficulty. Losses on modifications of loans over million to borrowers experiencing financial difficulty are estimated on an individual basis. Because the effect of the remainder of modifications made to borrowers experiencing financial difficulty is already incorporated into the measurement methodologies used to estimate the allowance, they are accounted for as pooled loans. The effects of reasonably expected TDRs are no longer considered in the measurement of expected credit losses. Prior to the adoption of ASU No. 2022-02, when determining the contractual term, the Company considered expected prepayments but was precluded from considering expected extensions, renewals, or modifications, unless the Company reasonably expected it would execute a TDR with a borrower. In the event of a reasonably expected TDR, the Company factored the reasonably-expected TDR into the expected credit losses estimate. For consumer loans, the point at which a TDR was reasonably expected was when the Company approved the borrower’s application for a modification (i.e., the borrower qualifies for the TDR) or when the Credit Administration department approved loan concessions on substandard loans. For commercial loans, the point at which a TDR was reasonably expected was when the Company approved the loan for modification or when the Credit Administration department approved loan concessions on substandard loans. The Company used a discounted cash flow methodology for a TDR to calculate the effect of the concession provided to the borrower within the ACL. ​ For purchased credit-deteriorated, otherwise referred to herein as PCD, assets are defined as acquired individual financial assets (or acquired groups of financial assets with similar risk characteristics) that, as of the date of acquisition, have experienced a more-than-insignificant deterioration in credit quality since origination, as determined by the Company’s assessment. The Company records acquired PCD loans by adding the expected credit losses (i.e., allowance for credit losses) to the purchase price of the financial assets rather than recording through the provision for credit losses in the income statement. The expected credit loss, as of the acquisition day, of a PCD loan is added to the allowance for credit losses. The non-credit discount or premium is the difference between the unpaid principal balance and the amortized cost basis as of the acquisition date. Subsequent to the acquisition date, the change in the ACL on PCD loans is recognized through the Provision for Credit Losses in the Condensed Consolidated Statements of Net Income. The non-credit discount or premium is accreted or amortized, respectively, into interest income over the remaining life of the PCD loan on a level-yield basis. ​ The Company follows its nonaccrual policy by reversing contractual interest income in the income statement when the Company places a loan on nonaccrual status. Therefore, management excludes the accrued interest receivable balance from the amortized cost basis in measuring expected credit losses on the portfolio and does not record an allowance for credit losses on accrued interest receivable. As of March 31, 2023 and December 31, 2022, the accrued interest receivables for loans recorded in Other Assets were ​ The Company has a variety of assets that have a component that qualifies as an off-balance sheet exposure. These primarily include undrawn portions of revolving lines of credit and standby letters of credit. The expected losses associated with these exposures within the unfunded portion of the expected credit loss are recorded as a liability on the balance sheet. Management has determined that a majority of the Company’s off-balance sheet credit exposures are not unconditionally cancellable. Management completes funding studies based on historical data to estimate the percentage of unfunded loan commitments that will ultimately be funded to calculate the reserve for unfunded commitments. Management applies this funding rate, along with the loss factor rate determined for each pooled loan segment, to unfunded loan commitments, excluding unconditionally cancellable exposures and letters of credit, to arrive at the reserve for unfunded loan commitments. As of March 31, 2023 and December 31, 2022, the liabilities recorded for expected credit losses on unfunded commitments were million, respectively. ​ ​ Reclassification and Correction ​ Certain amounts previously reported have been reclassified to conform to the current quarter’s presentation. Such reclassifications had no effect on net income and shareholders’ equity. ​ ​ The table below discloses the net change (increase or (decrease)) included in all the Condensed Consolidated Statements of Net Income line items in this Form 10-Q, as a result of the change in accounting treatment. There was no impact to Net Income or Shareholders’ Equity as previously reported. ​ ​ ​ ​ ​ (Dollars in thousands) ​ Three Months Ended March 31, ​ INCOME STATEMENT 2022 ​ Interest income: ​ ​ ​ ​ Effect to interest income on federal funds sold and interest-earning ​ ​ ​ deposits with banks ​ $ 7 ​ Net effect to interest income ​ ​ 7 ​ Effect to interest expense on deposits ​ ​ (37) ​ Net effect to interest expense ​ ​ (37) ​ Net effect to net interest income $ 44 ​ ​ ​ ​ ​ Noninterest Income: ​ ​ ​ ​ Effect to correspondent banking and capital market income ​ $ (44) ​ Net effect to noninterest income ​ $ (44) ​ Net effect to net income ​ $ — ​ ​

Recent Accounting and Regulator

Recent Accounting and Regulatory Pronouncements	3 Months Ended
	Mar. 31, 2023
Recent Accounting and Regulatory Pronouncements
Recent Accounting and Regulatory Pronouncements	Note 3 — Recent Accounting and Regulatory Pronouncements ​ Accounting Standards Adopted In March 2022, FASB issued ASU No. 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures . The amendments in this ASU eliminate the long-standing accounting guidance for Troubled Debt Restructurings (“TDRs”) by creditors in Subtopic 310-40, Receivables – Troubled Debt Restructurings by Creditors , as it is no longer meaningful due to the introduction of Topic 326, which requires an entity to consider lifetime expected credit losses on loans when establishing an allowance for credit losses. Thus, most losses that would have been realized for a TDR under Subtopic 310-40 are now captured by the accounting required under Topic 326. The amendments in this ASU also require that an entity disclose current-period gross write offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, Financial Instruments – Credit Losses Measured at Amortized Cost . The Company adopted ASU No. 2022-02 effective January 1, 2023. We elected to apply a prospective transition method, which applies only to modifications occurring after the adoption date. For loans meeting the Bank’s materiality criteria, which includes loans in excess of $250,000, an assessment of whether a borrower is experiencing financial difficulty is made on the date of the modification. On the transition date, the former TDR loans as of December 31, 2022 were designated as individually evaluated loans on January 1, 2023 and retained the allowance for credit losses allocated to these loans at the adoption date as the credit risk of these did not change. Aside from the changes to the disclosures required by ASU No. 2022-02, the ASU did not have a material impact on our consolidated financial statements. Issued But Not Yet Adopted Accounting Standards In March 2020, FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848 – Facilitation of the Effects of Reference Rate Reform on Financial Reporting and subsequently expanded the scope of ASU No. 2020-04 with the issuance of ASU No. 2021-01 and extended the sunset date to December 31, 2024 with ASU No. 2022-06. This update provides companies with optional guidance to ease the potential accounting burden associated with transitioning away from reference rates that will be discontinued. The amendments in this update provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The main provisions for contract modifications include optional relief by allowing the modification as a continuation of the existing contract without additional analysis and other optional expedients regarding embedded features. The amendments in this update apply only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate that will be discontinued because of reference rate reform. The amendments in this update were effective for all entities as of March 12, 2020 and may be applied through December 31, 2022. An entity may elect to apply the amendments in this update to eligible hedging relationships existing as of the beginning of the interim period that includes March 12, 2020 and to new eligible hedging relationships entered into after the beginning of the interim period that includes March 12, 2020. An entity may elect to apply the amendments for contract modifications as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020, up to the date that the financial statements are available to be issued. Once elected, the amendments in this update must be applied prospectively for all eligible contract modifications and hedging relationships. ​ The Company has established a LIBOR Committee and various subcommittees, which have evaluated the impact of adopting and implementing ASU 2020-04 on the consolidated financial statements, including the evaluation of all of the Company’s contracts, hedging relationships and other transactions that will be affected by reference rates that are being discontinued. The cross-functional LIBOR Committee and subcommittees have (1) assessed the Company's current exposure to LIBOR indexed instruments and the data, systems and processes that will be impacted; (2) established a detailed implementation plan; and (3) developed a formal governance structure for the transition. The Company is in the process of developing and implementing various proactive steps to facilitate the transition on behalf of customers, which include the adoption and ongoing implementation of fallback provisions that provide for the determination of replacement rates for LIBOR-linked financial products; the adoption of new products linked to alternative reference rates, such as adjustable-rate mortgages, consistent with guidance provided by the U.S. regulators, the Alternative Reference Rates Committee, and government sponsored entities; the cessation of quoting LIBOR and originating new products linked to LIBOR by December 31, 2021; and the selection of SOFR indices as the replacement indices, and successful completion of systems testing using the SOFR replacement indices. ​ The Company discontinued quoting LIBOR on September 30, 2021 and discontinued originating new products linked to LIBOR on December 31, 2021. The Company continues to evaluate its financial and operational infrastructure in its effort to transition all financial and strategic processes, systems, and models to reference rates other than LIBOR. The Company is in the process of developing and implementing processes to educate all client-facing associates and coordinate communications with customers regarding the transition. ​ ASU 2020-04 provides temporary, optional expedients and exceptions to ease the potential burden in accounting for modifications of loan contracts, borrowings, and other transactions related to reference rate reform associated with the LIBOR transition if certain criteria are met. In January 2021, the FASB issued ASU 2021-01 which clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. ASU 2022-06 extended the effective date through December 31, 2024. The amendments are effective as of March 12, 2020 through December 31, 2024 and can be adopted at the instrument level on an ongoing basis. Management is adopting these option expedients beginning April 1, 2023 to coincide with the transition and modification of our Libor-exposed instruments beginning in the second quarter of 2023. These modifications have not had and are not expected to have a material impact on the consolidated financial statements. ​ ​ ​ In March 2023, FASB issued ASU No. 2023-02, Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Tax Credit Structures Using the Proportional Amortization Method . The Proportional Amortization method was introduced by ASU No. 2014-01, but limited this amortization method to investments in low-income housing tax credit structures. The amendments in ASU 2023-02 will allow entities the option to elect whether they account for tax equity investments using the proportional amortization method if certain conditions are met, regardless of the program from which the income tax credits are received. The election would be on a program-by-program basis. The ASU would also require disclosures to be transparent about an entity’s investments that generate income tax credits and other income tax benefits. The amendments are effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years with early adoption permitted. The Company maintains investments in low-income housing tax structures and will evaluate whether it will change its current accounting treatment for low-income housing tax credits. The Company does not anticipate this ASU will have a material impact on its financial statements.

Mergers and Acquisitions

Mergers and Acquisitions	3 Months Ended
	Mar. 31, 2023
Mergers and Acquisitions
Mergers and Acquisitions	Note 4 — Mergers and Acquisitions Atlantic Capital Bancshares, Inc. (“Atlantic Capital” or “ACBI”) ​ On March 1, 2022, the Company acquired all of the outstanding common stock of Atlantic Capital in a stock transaction. Upon the terms and subject to the conditions set forth therein, Atlantic Capital merged with and into the Company, with the Company continuing as the surviving corporation in the merger. Immediately following the merger, Atlantic Capital’s wholly owned banking subsidiary, Atlantic Capital Bank, N.A. (“ACB”) merged with and into the Bank, which continues as the surviving bank. Shareholders of Atlantic Capital received shares of the Company’s common stock for each share of Atlantic Capital common stock they owned. In total, the purchase price for Atlantic Capital was million. ​ In the acquisition, the Company acquired $2.4 billion of loans, including PPP loans, at fair value, net of $54.3 million, or 2.24%, estimated discount to the outstanding principal balance, representing 10.0% of the Company’s total loans at December 31, 2021. Of the total loans acquired, management identified million that had more than insignificantly deteriorated since origination and were thus determined to be PCD loans. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805. The Company recognized goodwill on this acquisition of million. The goodwill was calculated based on the fair values of the assets acquired and liabilities assumed as of the acquisition date. ​ During three months ended March 31, 2023 and 2022, the Company incurred approximately $1.4 million and $5.6 million, respectively, of acquisition costs related to this transaction. These acquisition costs are reported in Merger and Branch Consolidation Related Expenses on the Company’s Condensed Consolidated Statements of Net Income. ​ The Atlantic Capital transaction was accounted for using the acquisition method of accounting and, accordingly, assets acquired, liabilities assumed and consideration exchanged were recorded at estimated fair value on the acquisition date. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Initial ​ Subsequent ​ ​ ​ ​ ​ As Recorded ​ Fair Value ​ Fair Value ​ As Recorded by ​ (Dollars in thousands) by Atlantic Capital Adjustments Adjustments ​ the Company Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 250,134 ​ $ 24 (a) $ — ​ $ 250,158 ​ Investment securities ​ ​ 717,332 ​ ​ (13,622) (b) ​ — ​ ​ 703,710 ​ Loans, net of allowance and mark ​ 2,394,256 ​ (18,964) (c) ​ (5,614) (c) 2,369,678 ​ Premises and equipment ​ 16,892 ​ 2,608 (d) ​ — ​ 19,500 ​ Intangible assets ​ ​ 22,572 ​ ​ (1,781) (e) ​ — ​ ​ 20,791 ​ Bank owned life insurance ​ ​ 74,613 ​ ​ — ​ ​ — ​ ​ 74,613 ​ Deferred tax asset ​ ​ 30,231 ​ ​ 2,273 (f) ​ (1,025) (f) ​ 31,479 ​ Other assets ​ 45,274 ​ (1,277) (g) ​ 7,557 (g) 51,554 ​ Total assets ​ $ 3,551,304 ​ $ (30,739) ​ $ 918 ​ $ 3,521,483 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Noninterest-bearing ​ $ 1,411,671 ​ $ — ​ $ — ​ $ 1,411,671 ​ Interest-bearing ​ 1,616,970 ​ — ​ ​ — ​ 1,616,970 ​ Total deposits ​ 3,028,641 ​ — ​ ​ — ​ 3,028,641 ​ Federal funds purchased and securities sold under agreements to repurchase ​ ​ 50,000 ​ ​ — ​ ​ — ​ ​ 50,000 ​ Other borrowings ​ ​ 74,131 ​ ​ 4,286 (h) ​ — ​ ​ 78,417 ​ Other liabilities ​ 50,711 ​ (2,075) (i) ​ — ​ 48,636 ​ Total liabilities ​ ​ 3,203,483 ​ ​ 2,211 ​ ​ — ​ ​ 3,205,694 ​ Net identifiable assets acquired over (under) liabilities assumed ​ ​ 347,821 ​ ​ (32,950) ​ ​ 918 ​ ​ 315,789 ​ Goodwill ​ — ​ 342,939 ​ ​ (918) ​ 342,021 ​ Net assets acquired over liabilities assumed ​ $ 347,821 ​ $ 309,989 ​ $ — ​ $ 657,810 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consideration: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ SouthState Corporation common shares issued ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7,330,803 ​ Purchase price per share of the Company's common stock ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 90.00 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Company common stock issued ($659,772) and cash exchanged for fractional shares ($19) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 659,791 ​ Stock option conversion ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1,135 ​ Restricted stock unit conversion ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2,870 ​ Restricted stock awards conversion (unvested awards) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (5,986) ​ Fair value of total consideration transferred ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 657,810 ​ Explanation of fair value adjustments (a)— Represents an adjustment to record time deposits with financial institutions at fair value (premium). (b)— Represents the reversal of Atlantic Capital's existing fair value adjustments of $17.2 million and the adjustment to record securities at fair value (discount) totaling $30.9 million (includes reclassification of all securities held as HTM to AFS totaling $237.6 million). (c)— Represents approximately 1.40%, or $34.0 million, net credit discount of the loan portfolio and 2.24% total net discount, or $54.3 million, including non-credit discount, based on a third-party valuation. Also, includes a reversal of Atlantic Capital's ending ACL of (d)— Represents the preliminary fair value adjustments of $2.6 million on fixed assets and leased assets. (e)— Represents approximately $17.5 million, or 0.63%, of CDI amount and $3.2 million for SBA servicing asset based on a third-party valuation. Atlantic Capital’s pre-merger goodwill and servicing asset of $19.9 million and $2.6 million, respectively, were written-off. (f)— Represents deferred tax asset related to fair value adjustments with marginal tax rate of 23.9%, which includes an adjustment from Atlantic Capital’s effective tax rate to the Company’s effective tax rate. The difference in effective tax rates relates to state income taxes. (g)— Represents the fair value adjustment (decrease) for low-income housing investments of $1.1 million, write-off of prepaid assets of $233,000, adjustments to receivables of $154,000 and fair value adjustment for Small Business Investment Company (“SBIC”) investments of $7.4 million. (h)— Represents the reversal of the existing Atlantic Capital’s issuance costs on subordinated debt of $0.9 million and recording the fair value adjustment (premium) of $3.4 million, based on a third-party valuation. (i)— Represents the reversal of $2.8 million of unfunded commitment liability at purchase date and the fair value adjustment to increase lease liabilities associated with rental facilities totaling $1.4 million. Also includes the reversal of uncertain tax liability of $0.7 million. ​ Comparative and Pro Forma Financial Information for the Atlantic Capital Acquisition ​ Pro-forma data for the three months ended March 31, 2022 listed in the table below presents pro-forma information as if the Atlantic Capital acquisition occurred at the beginning of 2022. These results combine the historical results of Atlantic Capital in the Company’s Consolidated Statements of Income and, while certain adjustments were made for the estimated impact of certain fair value adjustments and other acquisition-related activity, they are not indicative of what would have occurred had the acquisition taken place on January 1, 2022. ​ Merger-related costs of $5.6 million from the Atlantic Capital acquisition were incurred during the first quarter of 2022 and were excluded from pro forma information below. No adjustments have been made to reduce the impact of any OREO write downs, investment securities sold or repayment of borrowings recognized by Atlantic Capital in 2022. The core system conversion for the Atlantic Capital merger was completed during third quarter of 2022. The Company expects to achieve further operating cost savings and other business synergies as a result of the acquisition, which are not reflected in the pro forma amounts below. The total revenues presented below represent pro-forma net interest income plus pro-forma noninterest income: ​ ​ ​ ​ ​ ​ ​ ​ Pro Forma ​ ​ ​ Three Months Ended ​ (Dollars in thousands) ​ March 31, 2022 ​ Total revenues (net interest income plus noninterest income) $ 371,196 Net interest income ​ $ 281,577 ​ Net adjusted income available to the common shareholder ​ $ 113,903 ​ EPS — basic ​ $ 1.49 ​ EPS — diluted ​ $ 1.48 ​ ​ The disclosures regarding the results of operations for Atlantic Capital subsequent to the acquisition date are omitted as this information is not practical to obtain. The majority of the fixed costs and purchase accounting entries were booked on the Company’s core system making it impractical to determine Atlantic Capital’s results of operation on a stand-alone basis.

Securities

Securities	3 Months Ended
	Mar. 31, 2023
Securities
Securities	Note 5 —Securities ​ Investment Securities ​ The following is the amortized cost and fair value of investment securities held to maturity: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair (Dollars in thousands) Cost Gains Losses Value March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government agencies ​ $ 197,264 ​ $ — ​ $ (28,175) ​ $ 169,089 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,553,373 ​ ​ — ​ ​ (238,470) ​ ​ 1,314,903 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 468,794 ​ ​ — ​ ​ (63,317) ​ ​ 405,477 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 360,962 ​ ​ — ​ ​ (68,141) ​ ​ 292,821 ​ Small Business Administration loan-backed securities ​ ​ 56,280 ​ ​ — ​ ​ (10,958) ​ ​ 45,322 ​ ​ ​ $ 2,636,673 ​ $ — ​ $ (409,061) ​ $ 2,227,612 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government agencies ​ $ 197,262 ​ $ — ​ $ (29,787) ​ $ 167,475 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,591,646 ​ ​ — ​ ​ (255,093) ​ ​ 1,336,553 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 474,660 ​ ​ — ​ ​ (69,664) ​ ​ 404,996 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 362,586 ​ ​ — ​ ​ (66,304) ​ ​ 296,282 ​ Small Business Administration loan-backed securities ​ ​ 57,087 ​ ​ — ​ ​ (12,225) ​ ​ 44,862 ​ ​ ​ $ 2,683,241 ​ $ — ​ $ (433,073) ​ $ 2,250,168 ​ ​ The following is the amortized cost and fair value of investment securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair (Dollars in thousands) Cost Gains Losses Value March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ $ 273,035 ​ $ — ​ $ (4,939) ​ $ 268,096 ​ U.S. Government agencies ​ ​ 246,001 ​ ​ — ​ ​ (25,742) ​ ​ 220,259 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ 1,951,725 ​ — ​ (278,563) ​ 1,673,162 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 689,575 ​ ​ — ​ ​ (98,163) ​ ​ 591,412 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,180,323 ​ ​ 8 ​ ​ (192,894) ​ ​ 987,437 ​ State and municipal obligations ​ 1,138,809 ​ 4 ​ (171,856) ​ 966,957 ​ Small Business Administration loan-backed securities ​ 466,462 ​ 194 ​ (41,164) ​ 425,492 ​ Corporate securities ​ ​ 30,571 ​ ​ — ​ ​ (3,387) ​ ​ 27,184 ​ ​ ​ $ 5,976,501 ​ $ 206 ​ $ (816,708) ​ $ 5,159,999 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ $ 272,416 ​ $ — ​ $ (6,778) ​ $ 265,638 ​ U.S. Government agencies ​ ​ 245,972 ​ ​ — ​ ​ (26,884) ​ ​ 219,088 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,996,405 ​ — ​ (298,052) ​ 1,698,353 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 708,337 ​ ​ — ​ ​ (107,292) ​ ​ 601,045 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,196,700 ​ ​ 2,542 ​ ​ (198,844) ​ ​ 1,000,398 ​ State and municipal obligations ​ ​ 1,269,525 ​ 1,210 ​ (205,883) ​ 1,064,852 ​ Small Business Administration loan-backed securities ​ 491,203 ​ 302 ​ (46,695) ​ 444,810 ​ Corporate securities ​ 35,583 ​ ​ — ​ ​ (2,945) ​ ​ 32,638 ​ ​ ​ $ 6,216,141 ​ $ 4,054 ​ $ (893,373) ​ $ 5,326,822 ​ ​ During the three months ended March 31, 2023, there were gross gains of $1.3 million and gross losses of $1.3 million, a net gain of $45,000 , realized from the sale of available for sale securities. During the three months ended March 31, 2022, the Company sold securities totaling million that were acquired from ACBI on March 1, 2022. These securities were marked to fair value at merger and therefore resulted in The following is the amortized cost and carrying value of other investment securities: ​ ​ ​ ​ ​ ​ ​ ​ Carrying (Dollars in thousands) Value March 31, 2023: ​ ​ ​ ​ Federal Home Loan Bank stock ​ $ 53,335 ​ Federal Reserve Bank stock ​ ​ 150,261 ​ Investment in unconsolidated subsidiaries ​ 3,563 ​ Other nonmarketable investment securities ​ 10,832 ​ ​ ​ $ 217,991 ​ December 31, 2022: ​ ​ ​ ​ Federal Home Loan Bank stock ​ $ 15,085 ​ Federal Reserve Bank stock ​ ​ 150,261 ​ Investment in unconsolidated subsidiaries ​ 3,563 ​ Other nonmarketable investment securities ​ 10,808 ​ ​ ​ $ 179,717 ​ ​ Our other investment securities consist of non-marketable equity securities that have no readily determinable market value. Accordingly, when evaluating these securities for impairment, management considers the ultimate recoverability of the par value rather than recognizing temporary declines in value. As of March 31, 2023, we determined that there was no impairment on other investment securities. ​ The amortized cost and fair value of debt securities at March 31, 2023 by contractual maturity are detailed below. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without prepayment penalties. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities ​ Securities ​ ​ Held to Maturity ​ Available for Sale ​ ​ Amortized ​ Fair ​ Amortized ​ Fair (Dollars in thousands) Cost Value Cost Value Due in one year or less $ — ​ $ — $ 254,326 $ 250,191 ​ Due after one year through five years ​ 101,073 ​ 94,058 ​ 309,053 ​ 295,225 ​ Due after five years through ten years ​ 382,261 ​ 337,412 ​ 1,148,155 ​ 1,001,653 ​ Due after ten years ​ 2,153,339 ​ 1,796,142 ​ 4,264,967 ​ 3,612,930 ​ ​ ​ $ 2,636,673 ​ $ 2,227,612 ​ $ 5,976,501 ​ $ 5,159,999 ​ ​ Information pertaining to our securities with gross unrealized losses at March 31, 2023 and December 31, 2022, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than ​ Twelve Months ​ ​ Twelve Months ​ or More ​ ​ Gross Unrealized ​ Fair ​ Gross Unrealized ​ Fair (Dollars in thousands) Losses Value Losses Value March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities Held to Maturity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government agencies ​ $ — ​ $ — ​ $ 28,175 ​ $ 169,089 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ — ​ ​ — ​ ​ 238,470 ​ ​ 1,314,903 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,187 ​ 45,925 ​ 62,130 ​ 359,552 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 13,414 ​ ​ 57,771 ​ ​ 54,727 ​ ​ 235,050 ​ Small Business Administration loan-backed securities ​ ​ — ​ ​ — ​ ​ 10,958 ​ ​ 45,322 ​ ​ ​ $ 14,601 ​ $ 103,696 ​ $ 394,460 ​ $ 2,123,916 ​ Securities Available for Sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ $ — ​ $ — ​ $ 4,939 ​ $ 268,096 ​ U.S. Government agencies ​ ​ 1,065 ​ ​ 53,935 ​ ​ 24,677 ​ ​ 166,324 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,027 ​ ​ 32,334 ​ ​ 277,536 ​ ​ 1,640,828 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 2,650 ​ 73,464 ​ 95,513 ​ 517,948 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ 10,606 ​ ​ 107,009 ​ ​ 182,288 ​ ​ 874,332 ​ State and municipal obligations ​ 4,250 ​ ​ 74,784 ​ ​ 167,606 ​ ​ 888,984 ​ Small Business Administration loan-backed securities ​ 428 ​ ​ 80,092 ​ ​ 40,736 ​ ​ 278,346 ​ Corporate securities ​ ​ 635 ​ ​ 5,863 ​ ​ 2,752 ​ ​ 21,321 ​ ​ ​ $ 20,661 ​ $ 427,481 ​ $ 796,047 ​ $ 4,656,179 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities Held to Maturity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government agencies ​ $ 5,514 ​ $ 78,833 ​ $ 24,273 ​ $ 88,642 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 65,181 ​ ​ 513,086 ​ ​ 189,912 ​ ​ 823,467 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 30,284 ​ 277,868 ​ 39,380 ​ 127,128 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 14,318 ​ ​ 82,895 ​ ​ 51,986 ​ ​ 213,387 ​ Small Business Administration loan-backed securities ​ ​ — ​ ​ — ​ ​ 12,225 ​ ​ 44,862 ​ ​ ​ $ 115,297 ​ $ 952,682 ​ $ 317,776 ​ $ 1,297,486 ​ Securities Available for Sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ $ 6,778 ​ $ 265,638 ​ $ — ​ $ — ​ U.S. Government agencies ​ ​ 8,193 ​ ​ 138,807 ​ ​ 18,691 ​ ​ 80,281 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 42,767 ​ ​ 459,773 ​ ​ 255,285 ​ ​ 1,238,580 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 21,450 ​ 274,082 ​ 85,842 ​ 326,963 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 17,156 ​ ​ 206,228 ​ ​ 181,688 ​ ​ 767,002 ​ State and municipal obligations ​ ​ 97,084 ​ ​ 616,631 ​ ​ 108,799 ​ ​ 391,848 ​ Small Business Administration loan-backed securities ​ ​ 2,152 ​ ​ 92,535 ​ ​ 44,543 ​ ​ 264,933 ​ Corporate securities ​ 2,209 ​ ​ 28,374 ​ ​ 736 ​ ​ 4,264 ​ ​ ​ $ 197,789 ​ $ 2,082,068 ​ $ 695,584 ​ $ 3,073,871 ​ ​ Management evaluates securities for impairment where there has been a decline in fair value below the amortized cost basis of a security to determine whether there is a credit loss associated with the decline in fair value on at least a quarterly basis, and more frequently when economic or market concerns warrant such evaluation. Credit losses are calculated individually, rather than collectively, using a discounted cash flow method, whereby management compares the present value of expected cash flows with the amortized cost basis of the security. The credit loss component would be recognized through the provision for credit losses. Consideration is given to (1) the financial condition and near-term prospects of the issuer including looking at default and delinquency rates, (2) the outlook for receiving the contractual cash flows of the investments, (3) the extent to which the fair value has been less than cost, (4) our intent and ability to retain our investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value or for a debt security whether it is more-likely-than-not that we will be required to sell the debt security prior to recovering its fair value, (5) the anticipated outlook for changes in the general level of interest rates, (6) credit ratings, (7) third-party guarantees, and (8) collateral values. In analyzing an issuer’s financial condition, management considers whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, the results of reviews of the issuer’s financial condition, and the issuer’s anticipated ability to pay the contractual cash flows of the investments. The Company performed an analysis that determined that the following securities have a zero expected credit loss: U.S. Treasury Securities, Agency-Backed Securities including securities issued by Ginnie Mae, Fannie Mae, FHLB, FFCB and SBA. All of the U.S. Treasury and Agency-Backed Securities have the full faith and credit backing of the United States Government or one of its agencies. Municipal securities and all other securities that do not have a zero expected credit loss are evaluated quarterly to determine whether there is a credit loss associated with a decline in fair value. All debt securities in an unrealized loss position as of March 31, 2023 continue to perform as scheduled and we do not believe there is a credit loss or a provision for credit losses is necessary. Also, as part of our evaluation of our intent and ability to hold investments for a period of time sufficient to allow for any anticipated recovery in the market, we consider our investment strategy, cash flow needs, liquidity position, capital adequacy and interest rate risk position. We do not currently intend to sell the securities within the portfolio and it is not more-likely-than-not that we will be required to sell the debt securities. See Note 2 — Summary of Significant Account Policies for further discussion. ​ Management continues to monitor all of our securities with a high degree of scrutiny. There can be no assurance that we will not conclude in future periods that conditions existing at that time indicate some or all of its securities may be sold or would require a charge to earnings as a provision for credit losses in such periods. ​ At March 31, 2023, investment securities with a carrying value of $2.4 billion were pledged to secure public funds deposits and for other purposes required and permitted by law. The carrying value total of million pledged to secure interest rate swap positions with correspondents. At December 31, 2023, investment securities with a carrying value of billion were pledged to secure public funds deposits and for other purposes required and permitted by law. The carrying value total of Trading Securities ​ At March 31, 2023 and December 31, 2022, trading securities, at estimated fair value, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ (Dollars in thousands) 2023 2022 ​ U.S. Government agencies ​ $ 3,925 ​ $ 11,190 ​ Residential mortgage pass-through securities issued or guaranteed by U.S. ​ ​ ​ ​ ​ ​ ​ government agencies or sponsored enterprises ​ ​ 3,439 ​ ​ — ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,304 ​ ​ 4,589 ​ State and municipal obligations ​ ​ 7,122 ​ ​ 13,993 ​ Other debt securities ​ ​ 249 ​ ​ 1,491 ​ ​ ​ $ 16,039 ​ $ 31,263 ​ ​ Net losses on trading securities for the three months ended March 31, 2023 and 2022 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ (Dollars in thousands) 2023 2022 ​ Net losses on sales transaction ​ $ (139) ​ $ (1,239) ​ Net mark to mark losses ​ ​ (6) ​ ​ (1,976) ​ Net losses on trading securities ​ $ (145) ​ $ (3,215) ​ ​

Loans

Loans	3 Months Ended
	Mar. 31, 2023
Loans
Loans	Note 6 — Loans ​ The following is a summary of total loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ (Dollars in thousands) 2023 2022 Loans: ​ ​ ​ ​ ​ Construction and land development (1) ​ $ 2,749,290 ​ $ 2,860,360 ​ Commercial non-owner occupied ​ 8,236,216 ​ 8,072,959 ​ Commercial owner occupied real estate ​ 5,522,514 ​ 5,460,193 ​ Consumer owner occupied (2) ​ 5,528,546 ​ 5,162,042 ​ Home equity loans ​ 1,332,285 ​ 1,313,168 ​ Commercial and industrial ​ 5,321,306 ​ 5,313,483 ​ Other income producing property ​ 721,291 ​ 696,242 ​ Consumer ​ 1,277,549 ​ 1,278,426 ​ Other loans ​ 7,145 ​ 20,989 ​ Total loans ​ 30,696,142 ​ 30,177,862 ​ Less allowance for credit losses ​ (370,645) ​ (356,444) ​ Loans, net ​ $ 30,325,497 ​ $ 29,821,418 ​ (1) Construction and land development includes loans for both commercial construction and development, as well as loans for 1-4 family construction and lot loans. (2) Consumer owner occupied real estate includes loans on both 1-4 family owner occupied property, as well as loans collateralized by 1-4 family owner occupied property with a business intent. The above table reflects the loan portfolio at the amortized cost basis for the periods March 31, 2023 and December 31, 2022, to include net deferred costs of $55.3 million and $49.7 million, respectively, and unamortized discount total related to loans acquired of $64.7 million and $72.1 million, respectively. Accrued interest receivables of ​ The Company purchased loans through its acquisition of ACBI, for which there was, at acquisition, evidence of more than an insignificant deterioration of credit quality since origination. The carrying amount of those loans, at acquisition, is as follows: ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 1, 2022 ​ Book value of acquired loans at acquisition ​ $ 137,874 ​ Allowance for credit losses at acquisition ​ (13,758) ​ Non-credit discount at acquisition ​ (5,943) ​ Carrying value or book value of acquired loans at acquisition ​ $ 118,173 ​ ​ As part of the ongoing monitoring of the credit quality of our loan portfolio, management tracks certain credit quality indicators, including trends related to (i) the level of classified loans, (ii) net charge-offs, (iii) non-performing loans (see details below), and (iv) the general economic conditions of the markets that we serve. ​ The Company utilizes a risk grading matrix to assign a risk grade to each commercial loan. Classified loans are assessed at a minimum every six months. A description of the general characteristics of the risk grades is as follows: ● Pass —These loans range from minimal credit risk to average, however, still acceptable credit risk. ● Special mention —A special mention loan has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or the institution’s credit position at some future date. ● Substandard —A substandard loan is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so classified must have a well-defined weakness, or weaknesses, that may jeopardize the liquidation of the debt. A substandard loan is characterized by the distinct possibility that the Bank will sustain some loss if the deficiencies are not corrected. ● Doubtful —A doubtful loan has all of the weaknesses inherent in one classified as substandard with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of the currently existing facts, conditions and values, highly questionable and improbable. Construction and land development loans in the following table are on commercial and speculative real estate. Consumer owner occupied loans are collateralized by 1-4 family owner occupied property with a business intent. The following tables present the credit risk profile by risk grade of commercial loans by origination year as of March 31, 2023 and December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ ​ Amortized Cost Basis by Origination Year As of March 31, 2023 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Revolving ​ Total Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 65,979 ​ $ 898,029 ​ $ 602,843 ​ $ 109,487 ​ $ 34,046 ​ $ 33,860 ​ $ 75,139 ​ $ 1,819,383 Special mention ​ ​ — ​ ​ 2,022 ​ ​ 1,193 ​ ​ 264 ​ ​ 20,255 ​ ​ 7,671 ​ ​ — ​ ​ 31,405 Substandard ​ ​ 1,518 ​ ​ 139 ​ ​ 164 ​ ​ 9 ​ ​ 1,334 ​ ​ 1,590 ​ ​ — ​ ​ 4,754 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 6 ​ ​ — ​ ​ 6 Total Construction and land development ​ $ 67,497 ​ $ 900,190 ​ $ 604,200 ​ $ 109,760 ​ $ 55,635 ​ $ 43,127 ​ $ 75,139 ​ $ 1,855,548 Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 144,211 ​ $ 2,339,057 ​ $ 1,964,957 ​ $ 799,333 ​ $ 892,806 ​ $ 1,834,435 ​ $ 89,240 ​ $ 8,064,039 Special mention ​ ​ 95 ​ ​ 9,442 ​ ​ 708 ​ ​ 12,167 ​ ​ 5,423 ​ ​ 60,130 ​ ​ — ​ ​ 87,965 Substandard ​ ​ 2,875 ​ ​ 5,697 ​ ​ 38,180 ​ ​ 1,405 ​ ​ 10,164 ​ ​ 25,637 ​ ​ 253 ​ ​ 84,211 Doubtful ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 Total Commercial non-owner occupied ​ $ 147,181 ​ $ 2,354,196 ​ $ 2,003,846 ​ $ 812,905 ​ $ 908,393 ​ $ 1,920,202 ​ $ 89,493 ​ $ 8,236,216 Commercial non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ 51 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 51 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 165,248 ​ $ 1,052,756 ​ $ 1,154,709 ​ $ 712,735 ​ $ 702,606 ​ $ 1,437,016 ​ $ 70,057 ​ $ 5,295,127 Special mention ​ ​ 342 ​ ​ 3,576 ​ ​ 24,689 ​ ​ 3,285 ​ ​ 4,397 ​ ​ 37,842 ​ ​ 1,020 ​ ​ 75,151 Substandard ​ ​ 1,916 ​ ​ 14,645 ​ ​ 34,913 ​ ​ 19,882 ​ ​ 12,394 ​ ​ 68,401 ​ ​ 80 ​ ​ 152,231 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ 4 ​ ​ — ​ ​ 5 Total commercial owner occupied ​ $ 167,506 ​ $ 1,070,977 ​ $ 1,214,311 ​ $ 735,903 ​ $ 719,397 ​ $ 1,543,263 ​ $ 71,157 ​ $ 5,522,514 Commercial owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 417,089 ​ $ 1,349,157 ​ $ 807,583 ​ $ 478,312 ​ $ 253,680 ​ $ 514,686 ​ $ 1,354,618 ​ $ 5,175,125 Special mention ​ ​ 533 ​ ​ 6,705 ​ ​ 4,488 ​ ​ 702 ​ ​ 1,698 ​ ​ 4,791 ​ ​ 23,114 ​ ​ 42,031 Substandard ​ ​ 2,464 ​ ​ 4,025 ​ ​ 27,306 ​ ​ 5,574 ​ ​ 6,359 ​ ​ 13,109 ​ ​ 45,274 ​ ​ 104,111 Doubtful ​ ​ 1 ​ ​ 2 ​ ​ 17 ​ ​ 1 ​ ​ — ​ ​ 16 ​ ​ 2 ​ ​ 39 Total commercial and industrial ​ $ 420,087 ​ $ 1,359,889 ​ $ 839,394 ​ $ 484,589 ​ $ 261,737 ​ $ 532,602 ​ $ 1,423,008 ​ $ 5,321,306 Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 2 ​ $ 1,097 ​ $ 160 ​ $ 14 ​ $ 149 ​ $ 280 ​ $ 104 ​ $ 1,806 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 14,839 ​ $ 161,959 ​ $ 107,741 ​ $ 58,591 ​ $ 45,660 ​ $ 142,437 ​ $ 49,887 ​ $ 581,114 Special mention ​ ​ 80 ​ ​ 603 ​ ​ 859 ​ ​ 1,007 ​ ​ 337 ​ ​ 3,387 ​ ​ 2,076 ​ ​ 8,349 Substandard ​ ​ — ​ ​ 842 ​ ​ 900 ​ ​ 294 ​ ​ 236 ​ ​ 7,081 ​ ​ 614 ​ ​ 9,967 Doubtful ​ ​ — ​ ​ 397 ​ ​ — ​ ​ — ​ ​ — ​ ​ 6 ​ ​ — ​ ​ 403 Total other income producing property ​ $ 14,919 ​ $ 163,801 ​ $ 109,500 ​ $ 59,892 ​ $ 46,233 ​ $ 152,911 ​ $ 52,577 ​ $ 599,833 Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,349 ​ $ 4,740 ​ $ 3,117 ​ $ 1,720 ​ $ 382 ​ $ 467 ​ $ 17,524 ​ $ 29,299 Special mention ​ ​ — ​ ​ 528 ​ ​ 19 ​ ​ 132 ​ ​ 281 ​ ​ — ​ ​ — ​ ​ 960 Substandard ​ ​ — ​ ​ 7 ​ ​ 94 ​ ​ 931 ​ ​ 1,601 ​ ​ 193 ​ ​ 151 ​ ​ 2,977 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ 1 Total Consumer owner occupied ​ $ 1,349 ​ $ 5,275 ​ $ 3,230 ​ $ 2,783 ​ $ 2,264 ​ $ 661 ​ $ 17,675 ​ $ 33,237 Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 7,145 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 7,145 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total other loans ​ $ 7,145 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 7,145 Other loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Commercial Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 815,860 ​ $ 5,805,698 ​ $ 4,640,950 ​ $ 2,160,178 ​ $ 1,929,180 ​ $ 3,962,901 ​ $ 1,656,465 ​ $ 20,971,232 Special mention ​ ​ 1,050 ​ ​ 22,876 ​ ​ 31,956 ​ ​ 17,557 ​ ​ 32,391 ​ ​ 113,821 ​ ​ 26,210 ​ ​ 245,861 Substandard ​ ​ 8,773 ​ ​ 25,355 ​ ​ 101,557 ​ ​ 28,095 ​ ​ 32,088 ​ ​ 116,011 ​ ​ 46,372 ​ ​ 358,251 Doubtful ​ ​ 1 ​ ​ 399 ​ ​ 18 ​ ​ 2 ​ ​ — ​ ​ 33 ​ ​ 2 ​ ​ 455 Total Commercial Loans ​ $ 825,684 ​ $ 5,854,328 ​ $ 4,774,481 ​ $ 2,205,832 ​ $ 1,993,659 ​ $ 4,192,766 ​ $ 1,729,049 ​ $ 21,575,799 Total Commercial Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 2 ​ $ 1,097 ​ $ 211 ​ $ 14 ​ $ 149 ​ $ 280 ​ $ 104 ​ $ 1,857 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ ​ Amortized Cost Basis by Origination Year As of December 31, 2022 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ 2018 ​ Prior ​ Revolving ​ Total Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 875,751 ​ $ 742,985 ​ $ 134,996 ​ $ 63,439 ​ $ 14,521 ​ $ 29,442 ​ $ 65,656 ​ $ 1,926,790 Special mention ​ ​ 1,643 ​ ​ 988 ​ ​ 268 ​ ​ 76 ​ ​ 7,219 ​ ​ 2,068 ​ ​ — ​ ​ 12,262 Substandard ​ ​ 214 ​ ​ 10,409 ​ ​ 11 ​ ​ 2,326 ​ ​ — ​ ​ 4,282 ​ ​ — ​ ​ 17,242 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 6 ​ ​ — ​ ​ 6 Total Construction and land development ​ $ 877,608 ​ $ 754,382 ​ $ 135,275 ​ $ 65,841 ​ $ 21,740 ​ $ 35,798 ​ $ 65,656 ​ $ 1,956,300 Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 2,245,943 ​ $ 1,849,079 ​ $ 816,791 ​ $ 959,707 ​ $ 506,350 ​ $ 1,417,397 ​ $ 108,759 ​ $ 7,904,026 Special mention ​ ​ 7,579 ​ ​ 4,225 ​ ​ 936 ​ ​ 11,036 ​ ​ 24,067 ​ ​ 32,110 ​ ​ 5,000 ​ ​ 84,953 Substandard ​ ​ 13,256 ​ ​ 25,557 ​ ​ 609 ​ ​ 9,383 ​ ​ 6,472 ​ ​ 26,366 ​ ​ 2,257 ​ ​ 83,900 Doubtful ​ ​ — ​ ​ 1 ​ ​ — ​ ​ 79 ​ ​ — ​ ​ — ​ ​ — ​ ​ 80 Total Commercial non-owner occupied ​ $ 2,266,778 ​ $ 1,878,862 ​ $ 818,336 ​ $ 980,205 ​ $ 536,889 ​ $ 1,475,873 ​ $ 116,016 ​ $ 8,072,959 Commercial non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 8 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 360 ​ $ — ​ $ 368 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,046,562 ​ $ 1,136,289 ​ $ 725,040 ​ $ 709,669 ​ $ 446,497 ​ $ 1,080,522 ​ $ 75,506 ​ $ 5,220,085 Special mention ​ ​ 3,620 ​ ​ 25,263 ​ ​ 3,383 ​ ​ 7,934 ​ ​ 7,160 ​ ​ 34,724 ​ ​ 1,294 ​ ​ 83,378 Substandard ​ ​ 12,861 ​ ​ 34,210 ​ ​ 19,962 ​ ​ 16,502 ​ ​ 9,487 ​ ​ 62,808 ​ ​ 895 ​ ​ 156,725 Doubtful ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ 4 ​ ​ — ​ ​ 5 Total commercial owner occupied ​ $ 1,063,043 ​ $ 1,195,762 ​ $ 748,386 ​ $ 734,105 ​ $ 463,144 ​ $ 1,178,058 ​ $ 77,695 ​ $ 5,460,193 Commercial owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,143 ​ ​ — ​ ​ 833 ​ ​ — ​ ​ 1,976 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,566,203 ​ $ 895,368 ​ $ 506,655 ​ $ 274,446 ​ $ 212,522 ​ $ 333,286 ​ $ 1,386,678 ​ $ 5,175,158 Special mention ​ ​ 5,885 ​ ​ 3,782 ​ ​ 3,401 ​ ​ 1,859 ​ ​ 3,378 ​ ​ 1,316 ​ ​ 24,347 ​ ​ 43,968 Substandard ​ ​ 6,308 ​ ​ 27,974 ​ ​ 4,770 ​ ​ 6,591 ​ ​ 6,783 ​ ​ 8,476 ​ ​ 32,876 ​ ​ 93,778 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 155 ​ ​ 422 ​ ​ 2 ​ ​ 579 Total commercial and industrial ​ $ 1,578,396 ​ $ 927,124 ​ $ 514,826 ​ $ 282,896 ​ $ 222,838 ​ $ 343,500 ​ $ 1,443,903 ​ $ 5,313,483 Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ ​ 4 ​ ​ 2,825 ​ ​ 198 ​ ​ 630 ​ ​ 2,214 ​ ​ 2,589 ​ ​ 1,742 ​ ​ 10,202 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 149,793 ​ $ 92,887 ​ $ 60,473 ​ $ 46,189 ​ $ 47,155 ​ $ 107,436 ​ $ 46,179 ​ $ 550,112 Special mention ​ ​ 952 ​ ​ 957 ​ ​ 1,257 ​ ​ 378 ​ ​ 190 ​ ​ 3,652 ​ ​ 2,328 ​ ​ 9,714 Substandard ​ ​ 876 ​ ​ 359 ​ ​ 1,281 ​ ​ 300 ​ ​ 214 ​ ​ 11,214 ​ ​ 1,065 ​ ​ 15,309 Doubtful ​ ​ 401 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 136 ​ ​ — ​ ​ 537 Total other income producing property ​ $ 152,022 ​ $ 94,203 ​ $ 63,011 ​ $ 46,867 ​ $ 47,559 ​ $ 122,438 ​ $ 49,572 ​ $ 575,672 Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 46 ​ $ 50 ​ $ 96 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 5,947 ​ $ 3,124 ​ $ 1,811 ​ $ 418 ​ $ 68 ​ $ 332 ​ $ 15,910 ​ $ 27,610 Special mention ​ ​ 537 ​ ​ 20 ​ ​ 136 ​ ​ 284 ​ ​ — ​ ​ — ​ ​ 66 ​ ​ 1,043 Substandard ​ ​ 13 ​ ​ 95 ​ ​ 12 ​ ​ 1,614 ​ ​ — ​ ​ 202 ​ ​ 151 ​ ​ 2,087 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ 1 Total Consumer owner occupied ​ $ 6,497 ​ $ 3,239 ​ $ 1,959 ​ $ 2,316 ​ $ 69 ​ $ 534 ​ $ 16,127 ​ $ 30,741 Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 20,989 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 20,989 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total other loans ​ $ 20,989 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 20,989 Other loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Commercial Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 5,911,188 ​ $ 4,719,732 ​ $ 2,245,766 ​ $ 2,053,868 ​ $ 1,227,113 ​ $ 2,968,415 ​ $ 1,698,688 ​ $ 20,824,770 Special mention ​ ​ 20,216 ​ ​ 35,235 ​ ​ 9,381 ​ ​ 21,567 ​ ​ 42,014 ​ ​ 73,870 ​ ​ 33,035 ​ ​ 235,318 Substandard ​ ​ 33,528 ​ ​ 98,604 ​ ​ 26,645 ​ ​ 36,716 ​ ​ 22,956 ​ ​ 113,348 ​ ​ 37,244 ​ ​ 369,041 Doubtful ​ ​ 401 ​ ​ 1 ​ ​ 1 ​ ​ 79 ​ ​ 156 ​ ​ 568 ​ ​ 2 ​ ​ 1,208 Total Commercial Loans ​ $ 5,965,333 ​ $ 4,853,572 ​ $ 2,281,793 ​ $ 2,112,230 ​ $ 1,292,239 ​ $ 3,156,201 ​ $ 1,768,969 ​ $ 21,430,337 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 12 ​ $ 2,825 ​ $ 198 ​ $ 1,773 ​ $ 2,214 ​ $ 3,828 ​ $ 1,792 ​ $ 12,642 ​ For the consumer segment, delinquency of a loan is determined by past due status. Consumer loans are automatically placed on nonaccrual status once the loan is 90 days past due. Construction and land development loans are on 1-4 properties and lots. The following table presents the credit risk profile by past due status of consumer loans by origination year as of March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ Amortized Cost Basis by Origination Year As of March 31, 2023 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Revolving ​ Total Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 240,632 ​ $ 1,748,552 ​ $ 1,587,281 ​ $ 657,794 ​ $ 309,618 ​ $ 939,645 ​ $ — ​ $ 5,483,522 30 days past due ​ ​ — ​ ​ 438 ​ ​ 451 ​ ​ 323 ​ ​ 672 ​ ​ 2,242 ​ ​ — ​ ​ 4,126 60 days past due ​ ​ — ​ ​ 243 ​ ​ 97 ​ ​ 620 ​ ​ — ​ ​ 746 ​ ​ — ​ ​ 1,706 90 days past due ​ ​ — ​ ​ 676 ​ ​ 268 ​ ​ 853 ​ ​ 683 ​ ​ 3,475 ​ ​ — ​ ​ 5,955 Total Consumer owner occupied ​ $ 240,632 ​ $ 1,749,909 ​ $ 1,588,097 ​ $ 659,590 ​ $ 310,973 ​ $ 946,108 ​ $ — ​ $ 5,495,309 Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 2 ​ $ — ​ $ 2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 4,563 ​ $ 7,084 ​ $ 5,367 ​ $ 3,733 ​ $ 1,141 ​ $ 17,773 ​ $ 1,287,131 ​ $ 1,326,792 30 days past due ​ ​ — ​ ​ 273 ​ ​ — ​ ​ — ​ ​ 89 ​ ​ 1,003 ​ ​ 2,424 ​ ​ 3,789 60 days past due ​ ​ — ​ ​ 59 ​ ​ — ​ ​ — ​ ​ — ​ ​ 221 ​ ​ 494 ​ ​ 774 90 days past due ​ ​ — ​ ​ — ​ ​ 162 ​ ​ 21 ​ ​ 277 ​ ​ 121 ​ ​ 349 ​ ​ 930 Total Home equity loans ​ $ 4,563 ​ $ 7,416 ​ $ 5,529 ​ $ 3,754 ​ $ 1,507 ​ $ 19,118 ​ $ 1,290,398 ​ $ 1,332,285 Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ 39 ​ $ — ​ $ — ​ $ — ​ $ 39 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 104,807 ​ $ 383,665 ​ $ 187,023 ​ $ 100,664 ​ $ 78,646 ​ $ 173,622 ​ $ 224,373 ​ $ 1,252,800 30 days past due ​ ​ — ​ ​ 252 ​ ​ 449 ​ ​ 37 ​ ​ 107 ​ ​ 1,213 ​ ​ 11,052 ​ ​ 13,110 60 days past due ​ ​ — ​ ​ 231 ​ ​ 19 ​ ​ 49 ​ ​ 55 ​ ​ 242 ​ ​ 7,531 ​ ​ 8,127 90 days past due ​ ​ — ​ ​ 456 ​ ​ 76 ​ ​ 39 ​ ​ 34 ​ ​ 1,400 ​ ​ 1,507 ​ ​ 3,512 Total consumer ​ $ 104,807 ​ $ 384,604 ​ $ 187,567 ​ $ 100,789 ​ $ 78,842 ​ $ 176,477 ​ $ 244,463 ​ $ 1,277,549 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 20 ​ $ 295 ​ $ 100 ​ $ 79 ​ $ 100 ​ $ 244 ​ $ 1,891 ​ $ 2,729 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 20,979 ​ $ 554,627 ​ $ 251,650 ​ $ 35,810 ​ $ 11,006 ​ $ 18,336 ​ $ 615 ​ $ 893,023 30 days past due ​ ​ — ​ ​ 325 ​ ​ — ​ ​ — ​ ​ — ​ ​ 279 ​ ​ — ​ ​ 604 60 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ 22 ​ ​ — ​ ​ 92 ​ ​ — ​ ​ 114 90 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 Total Construction and land development ​ $ 20,979 ​ $ 554,952 ​ $ 251,650 ​ $ 35,833 ​ $ 11,006 ​ $ 18,707 ​ $ 615 ​ $ 893,742 Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 3,664 ​ $ 45,269 ​ $ 20,833 ​ $ 4,812 ​ $ 2,624 ​ $ 43,104 ​ $ 604 ​ $ 120,910 30 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 292 ​ ​ — ​ ​ 292 60 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 256 ​ ​ — ​ ​ 256 Total other income producing property ​ $ 3,664 ​ $ 45,269 ​ $ 20,833 ​ $ 4,812 ​ $ 2,624 ​ $ 43,652 ​ $ 604 ​ $ 121,458 Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Consumer Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 374,645 ​ $ 2,739,197 ​ $ 2,052,154 ​ $ 802,813 ​ $ 403,035 ​ $ 1,192,480 ​ $ 1,512,723 ​ $ 9,077,047 30 days past due ​ ​ — ​ ​ 1,288 ​ ​ 900 ​ ​ 360 ​ ​ 868 ​ ​ 5,029 ​ ​ 13,476 ​ ​ 21,921 60 days past due ​ ​ — ​ ​ 533 ​ ​ 116 ​ ​ 691 ​ ​ 55 ​ ​ 1,301 ​ ​ 8,025 ​ ​ 10,721 90 days past due ​ ​ — ​ ​ 1,132 ​ ​ 506 ​ ​ 914 ​ ​ 994 ​ ​ 5,252 ​ ​ 1,856 ​ ​ 10,654 Total Consumer Loans ​ $ 374,645 ​ $ 2,742,150 ​ $ 2,053,676 ​ $ 804,778 ​ $ 404,952 ​ $ 1,204,062 ​ $ 1,536,080 ​ $ 9,120,343 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 20 ​ $ 295 ​ $ 100 ​ $ 118 ​ $ 100 ​ $ 246 ​ $ 1,891 ​ $ 2,770 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ Amortized Cost Basis by Origination Year As of March 31, 2023 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Revolving ​ Total Total Loans ​ $ 1,200,329 ​ $ 8,596,478 ​ $ 6,828,157 ​ $ 3,010,610 ​ $ 2,398,611 ​ $ 5,396,828 ​ $ 3,265,129 ​ $ 30,696,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 890 ​ $ 524 ​ $ 311 ​ $ 132 ​ $ 249 ​ $ 526 ​ $ 1,995 ​ $ 4,627 The following table presents the credit risk profile by past due status of consumer loans by origination year as of December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ Amortized Cost Basis by Origination Year As of December 31, 2022 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ 2018 ​ Prior ​ Revolving ​ Total Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 1,695,454 ​ $ 1,467,080 ​ $ 657,005 ​ $ 315,458 ​ $ 187,580 ​ $ 792,572 ​ $ — ​ $ 5,115,149 30 days past due ​ ​ 1,316 ​ ​ 1,254 ​ ​ 1,681 ​ ​ 664 ​ ​ 272 ​ ​ 2,028 ​ ​ — ​ ​ 7,215 60 days past due ​ ​ 255 ​ ​ 337 ​ ​ 579 ​ ​ — ​ ​ 242 ​ ​ 1,650 ​ ​ — ​ ​ 3,063 90 days past due ​ ​ — ​ ​ 944 ​ ​ 776 ​ ​ 454 ​ ​ 664 ​ ​ 3,036 ​ ​ — ​ ​ 5,874 Total Consumer owner occupied ​ $ 1,697,025 ​ $ 1,469,615 ​ $ 660,041 ​ $ 316,576 ​ $ 188,758 ​ $ 799,286 ​ $ — ​ $ 5,131,301 Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 25 ​ $ — ​ $ — ​ $ 6 ​ $ 23 ​ $ 66 ​ $ — ​ $ 120 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 5,921 ​ $ 5,231 ​ $ 3,282 ​ $ 1,560 ​ $ 1,955 ​ $ 17,941 ​ $ 1,272,848 ​ $ 1,308,738 30 days past due ​ ​ — ​ ​ — ​ ​ 155 ​ ​ 77 ​ ​ 418 ​ ​ 422 ​ ​ 1,586 ​ ​ 2,658 60 days past due ​ ​ — ​ ​ — ​ ​ 19 ​ ​ 36 ​ ​ 70 ​ ​ 26 ​ ​ 540 ​ ​ 691 90 days past due ​ ​ — ​ ​ — ​ ​ 60 ​ ​ 87 ​ ​ — ​ ​ 611 ​ ​ 323 ​ ​ 1,081 Total Home equity loans ​ $ 5,921 ​ $ 5,231 ​ $ 3,516 ​ $ 1,760 ​ $ 2,443 ​ $ 19,000 ​ $ 1,275,297 ​ $ 1,313,168 Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ 19 ​ $ — ​ $ 280 ​ $ 146 ​ $ 445 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 407,825 ​ $ 206,003 ​ $ 111,210 ​ $ 86,008 ​ $ 44,303 ​ $ 141,053 ​ $ 248,314 ​ $ 1,244,716 30 days past due ​ ​ 718 ​ ​ 194 ​ ​ 78 ​ ​ 174 ​ ​ 63 ​ ​ 1,255 ​ ​ 17,471 ​ ​ 19,953 60 days past due ​ ​ 55 ​ ​ 103 ​ ​ 107 ​ ​ 36 ​ ​ 144 ​ ​ 557 ​ ​ 9,836 ​ ​ 10,838 90 days past due ​ ​ 126 ​ ​ 60 ​ ​ 58 ​ ​ 66 ​ ​ 165 ​ ​ 1,660 ​ ​ 784 ​ ​ 2,919 Total consumer ​ $ 408,724 ​ $ 206,360 ​ $ 111,453 ​ $ 86,284 ​ $ 44,675 ​ $ 144,525 ​ $ 276,405 ​ $ 1,278,426 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 254 ​ $ 653 ​ $ 337 ​ $ 265 ​ $ 62 ​ $ 664 ​ $ 7,979 ​ $ 10,214 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 466,475 ​ $ 351,485 ​ $ 50,472 ​ $ 14,053 ​ $ 7,006 ​ $ 13,588 ​ $ 379 ​ $ 903,458 30 days past due ​ ​ 2 ​ ​ — ​ ​ — ​ ​ 57 ​ ​ 23 ​ ​ 43 ​ ​ — ​ ​ 125 60 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days past due ​ ​ — ​ ​ — ​ ​ 436 ​ ​ — ​ ​ — ​ ​ 41 ​ ​ — ​ ​ 477 Total Construction and land development ​ $ 466,477 ​ $ 351,485 ​ $ 50,908 ​ $ 14,110 ​ $ 7,029 ​ $ 13,672 ​ $ 379 ​ $ 904,060 Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ 21 ​ $ — ​ $ — ​ $ 4 ​ $ — ​ $ 25 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 45,717 ​ $ 21,421 ​ $ 4,937 ​ $ 2,663 ​ $ 4,322 ​ $ 40,680 ​ $ 624 ​ $ 120,364 30 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 62 ​ ​ — ​ ​ 62 60 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 23 ​ ​ — ​ ​ 23 90 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 121 ​ ​ — ​ ​ 121 Total other income producing property ​ $ 45,717 ​ $ 21,421 ​ $ 4,937 ​ $ 2,663 ​ $ 4,322 ​ $ 40,886 ​ $ 624 ​ $ 120,570 Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Consumer Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 2,621,392 ​ $ 2,051,220 ​ $ 826,906 ​ $ 419,742 ​ $ 245,166 ​ $ 1,005,834 ​ $ 1,522,165 ​ $ 8,692,425 30 days past due ​ ​ 2,036 ​ ​ 1,448 ​ ​ 1,914 ​ ​ 972 ​ ​ 776 ​ ​ 3,810 ​ ​ 19,057 ​ ​ 30,013 60 days past due ​ ​ 310 ​ ​ 440 ​ ​ 705 ​ ​ 72 ​ ​ 456 ​ ​ 2,256 ​ ​ 10,376 ​ ​ 14,615 90 days past due ​ ​ 126 ​ ​ 1,004 ​ ​ 1,330 ​ ​ 607 ​ ​ 829 ​ ​ 5,469 ​ ​ 1,107 ​ ​ 10,472 Total Consumer Loans ​ $ 2,623,864 ​ $ 2,054,112 ​ $ 830,855 ​ $ 421,393 ​ $ 247,227 ​ $ 1,017,369 ​ $ 1,552,705 ​ $ 8,747,525 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 279 ​ $ 653 ​ $ 358 ​ $ 290 ​ $ 85 ​ $ 1,014 ​ $ 8,125 ​ $ 10,804 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ Amortized Cost Basis by Origination Year As of December 31, 2022 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ 2018 ​ Prior ​ Revolving ​ Total Total Loans ​ $ 8,589,197 ​ $ 6,907,684 ​ $ 3,112,648 ​ $ 2,533,623 ​ $ 1,539,466 ​ $ 4,173,570 ​ $ 3,321,674 ​ $ 30,177,862 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 291 ​ $ 3,478 ​ $ 556 ​ $ 2,063 ​ $ 2,299 ​ $ 4,842 ​ $ 9,917 ​ $ 23,446 ​ The following table presents an aging analysis of past due accruing loans, segregated by class. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 Days 60 - 89 Days 90+ Days Total ​ Non- ​ Total (Dollars in thousands) ​ Past Due ​ Past Due ​ Past Due ​ Past Due ​ Current ​ Accruing ​ Loans March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ $ 980 ​ $ 4,050 ​ $ — ​ $ 5,030 ​ $ 2,743,954 ​ $ 306 ​ $ 2,749,290 Commercial non-owner occupied ​ 4,410 ​ 1,778 ​ — ​ 6,188 ​ 8,208,270 ​ 21,758 ​ 8,236,216 Commercial owner occupied ​ 3,841 ​ ​ 4,552 ​ 1,665 ​ 10,058 ​ 5,476,893 ​ 35,563 ​ 5,522,514 Consumer owner occupied ​ 2,521 ​ 1,344 ​ — ​ 3,865 ​ 5,505,300 ​ 19,381 ​ 5,528,546 Home equity loans ​ 2,811 ​ 673 ​ — ​ 3,484 ​ 1,323,065 ​ 5,736 ​ 1,332,285 Commercial and industrial ​ 21,931 ​ 9,618 ​ 1,837 ​ 33,386 ​ 5,257,967 ​ 29,953 ​ 5,321,306 Other income producing property ​ 2,224 ​ 156 ​ 147 ​ 2,527 ​ 715,773 ​ 2,991 ​ 721,291 Consumer ​ 13,015 ​ 8,002 ​ 1 ​ 21,018 ​ 1,251,249 ​ 5,282 ​ 1,277,549 Other loans ​ — ​ — ​ — ​ — ​ 7,145 ​ — ​ 7,145 ​ ​ $ 51,733 ​ $ 30,173 ​ $ 3,650 ​ $ 85,556 ​ $ 30,489,616 ​ $ 120,970 ​ $ 30,696,142 December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ $ 2,146 ​ $ 3,653 ​ $ — ​ $ 5,799 ​ $ 2,853,734 ​ $ 827 ​ $ 2,860,360 Commercial non-owner occupied ​ 1,158 ​ 978 ​ 77 ​ 2,213 ​ 8,050,321 ​ 20,425 ​ 8,072,959 Commercial owner occupied ​ 10,748 ​ ​ 2,059 ​ 2,231 ​ 15,038 ​ 5,410,066 ​ 35,089 ​ 5,460,193 Consumer owner occupied ​ ​ 6,001 ​ 744 ​ 40 ​ 6,785 ​ 5,137,950 ​ 17,307 ​ 5,162,042 Home equity loans ​ 2,527 ​ 361 ​ — ​ 2,888 ​ 1,303,964 ​ 6,316 ​ 1,313,168 Commercial and industrial ​ 24,500 ​ 11,677 ​ 1,704 ​ 37,881 ​ 5,258,473 ​ 17,129 ​ 5,313,483 Other income producing property ​ 1,623 ​ 1,480 ​ 298 ​ 3,401 ​ 690,107 ​ 2,734 ​ 696,242 Consumer ​ 19,713 ​ 10,655 ​ — ​ 30,368 ​ 1,243,660 ​ 4,398 ​ 1,278,426 Other loans ​ — ​ — ​ — ​ — ​ 20,989 ​ — ​ 20,989 ​ ​ $ 68,416 ​ $ 31,607 ​ $ 4,350 ​ $ 104,373 ​ $ 29,969,264 ​ $ 104,225 ​ $ 30,177,862 ​ The following table is a summary of information pertaining to nonaccrual loans by class, including loans modified for borrowers with financial difficulty as of March 31, 2023 and the information pertaining to nonaccrual loans by class, including restructured loans as of December 31, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ Greater than ​ Non-accrual ​ December 31, ​ ​ (Dollars in thousands) ​ 2023 ​ 90 Days Accruing (1) with no allowance (1) 2022 Construction and land development ​ $ 306 ​ $ — ​ $ 8 ​ $ 827 ​ ​ Commercial non-owner occupied ​ 21,758 ​ ​ — ​ 11,338 ​ 20,425 ​ ​ Commercial owner occupied real estate ​ 35,563 ​ ​ 1,665 ​ 15,034 ​ 35,089 ​ ​ Consumer owner occupied ​ 19,381 ​ ​ — ​ 5 ​ 17,307 ​ ​ Home equity loans ​ 5,736 ​ ​ — ​ 1,489 ​ 6,316 ​ ​ Commercial and industrial ​ 29,953 ​ ​ 1,837 ​ 6,252 ​ 17,129 ​ ​ Other income producing property ​ 2,991 ​ ​ 147 ​ — ​ 2,734 ​ ​ Consumer ​ 5,282 ​ ​ 1 ​ — ​ 4,398 ​ ​ Total loans on nonaccrual status ​ $ 120,970 ​ $ 3,650 ​ $ 34,126 ​ $ 104,225 ​ ​ (1) – Greater than 90 days accruing and non-accrual with no allowance loans at March 31, 2023. There is no interest income recognized during the period on nonaccrual loans. The Company follows its nonaccrual policy by reversing contractual interest income in the income statement when the Company places a loan on nonaccrual status. Loans on nonaccrual status in which there is no allowance assigned are individually evaluated loans that do not carry a specific reserve. See Note 2 Summary of Significant Accounting Policies for further detailed on individually evaluated loans. The following is a summary of collateral dependent loans, by type of collateral, and the extent to which they are collateralized during the period: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ Collateral ​ ​ December 31, ​ Collateral ​ ​ (Dollars in thousands) ​ 2023 Coverage % ​ 2022 Coverage % ​ Commercial owner occupied real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Industrial ​ $ 8,166 ​ $ 9,344 114% ​ $ — ​ $ — ​ ​ Other ​ ​ 6,868 ​ ​ 17,012 248% ​ ​ 14,638 ​ ​

Allowance for Credit Losses (AC

Allowance for Credit Losses (ACL)	3 Months Ended
	Mar. 31, 2023
Allowance for Credit Losses (ACL)
Allowance for Credit Losses (ACL)	​ Note 7 — Allowance for Credit Losses (ACL) See Note 2 — Summary of Significant Accounting Policies in this Quarterly Report on Form 10-Q for further detailed descriptions of our estimation process and methodology related to the allowance for credit losses. The following table presents a disaggregated analysis of activity in the allowance for credit losses as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ Residential ​ ​ ​ Residential ​ Other ​ ​ ​ ​ ​ ​ ​ CRE Owner ​ Non-Owner ​ ​ ​ ​ ​ (Dollars in thousands) ​ Mortgage Sr. ​ Mortgage Jr. ​ HELOC ​ Construction ​ C&D ​ Consumer ​ Multifamily ​ Municipal ​ Occupied ​ Occupied CRE ​ C & I ​ Total Three Months Ended March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at end of period December 31, 2022 ​ $ 72,188 ​ $ 405 ​ $ 14,886 ​ $ 8,974 ​ $ 45,410 ​ $ 22,767 ​ $ 3,684 ​ $ 849 ​ $ 58,083 ​ $ 78,485 ​ $ 50,713 ​ $ 356,444 Charge-offs ​ (2) ​ — ​ (39) ​ — ​ — ​ (2,729) ​ — ​ — ​ — ​ ​ (51) ​ ​ (1,806) ​ (4,627) Recoveries ​ 294 ​ 5 ​ 245 ​ 72 ​ 258 ​ 584 ​ — ​ — ​ 293 ​ ​ 106 ​ ​ 1,732 ​ 3,589 Net (charge offs) recoveries ​ ​ 292 ​ 5 ​ 206 ​ 72 ​ 258 ​ (2,145) ​ — ​ — ​ 293 ​ ​ 55 ​ ​ (74) ​ ​ (1,038) Provision (recovery) (1) ​ 4,871 ​ (61) ​ (774) ​ 130 ​ 9,401 ​ 2,697 ​ 1,823 ​ 30 ​ (835) ​ ​ 3,933 ​ ​ (5,976) ​ 15,239 Balance at end of period March 31, 2023 ​ $ 77,351 ​ $ 349 ​ $ 14,318 ​ $ 9,176 ​ $ 55,069 ​ $ 23,319 ​ $ 5,507 ​ $ 879 ​ $ 57,541 ​ $ 82,473 ​ $ 44,663 ​ $ 370,645 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative allowance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collectively evaluated ​ $ 77,982 ​ $ 350 ​ $ 12,229 ​ $ 8,994 ​ $ 49,865 ​ $ 23,319 ​ $ 5,369 ​ $ 731 ​ $ 49,297 ​ $ 78,013 ​ $ 35,355 ​ $ 341,504 Individually evaluated ​ ​ 197 ​ ​ — ​ ​ 2,285 ​ ​ — ​ ​ 155 ​ ​ — ​ ​ — ​ ​ — ​ ​ 6,812 ​ ​ 2,721 ​ ​ 4,612 ​ ​ 16,782 Total quantitative allowance ​ ​ 78,179 ​ ​ 350 ​ ​ 14,514 ​ ​ 8,994 ​ ​ 50,020 ​ ​ 23,319 ​ ​ 5,369 ​ ​ 731 ​ ​ 56,109 ​ ​ 80,734 ​ ​ 39,967 ​ ​ 358,286 Qualitative allowance ​ ​ (828) ​ ​ (1) ​ ​ (196) ​ ​ 182 ​ ​ 5,049 ​ ​ — ​ ​ 138 ​ ​ 148 ​ ​ 1,432 ​ ​ 1,739 ​ ​ 4,696 ​ ​ 12,359 Balance at end of period March 31, 2023 ​ $ 77,351 ​ $ 349 ​ $ 14,318 ​ $ 9,176 ​ $ 55,069 ​ $ 23,319 ​ $ 5,507 ​ $ 879 ​ $ 57,541 ​ $ 82,473 ​ $ 44,663 ​ $ 370,645 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at end of period December 31, 2021 ​ $ 47,036 ​ $ 611 ​ $ 13,325 ​ $ 4,997 ​ $ 37,593 ​ $ 23,149 ​ $ 4,921 ​ $ 565 ​ $ 61,794 ​ $ 79,649 ​ $ 28,167 ​ $ 301,807 Initial Allowance for PCD loans acquired during period ​ ​ 84 ​ ​ — ​ ​ — ​ ​ — ​ ​ 86 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,479 ​ ​ — ​ ​ 7,569 ​ ​ 9,218 Initial Allowance for Non PCD loans acquired during period ​ ​ 352 ​ ​ 26 ​ ​ 132 ​ ​ 2 ​ ​ 1,887 ​ ​ 51 ​ ​ 426 ​ ​ — ​ ​ 2,519 ​ ​ 2,697 ​ ​ 5,605 ​ ​ 13,697 Charge-offs ​ (58) ​ (19) ​ (218) ​ — ​ (4) ​ (2,661) ​ — ​ — ​ (371) ​ ​ — ​ ​ (2,159) ​ (5,490) Recoveries ​ 394 ​ 55 ​ 257 ​ 3 ​ 234 ​ 532 ​ — ​ — ​ 314 ​ ​ 69 ​ ​ 1,309 ​ 3,167 Net (charge offs) recoveries ​ ​ 336 ​ ​ 36 ​ ​ 39 ​ ​ 3 ​ ​ 230 ​ ​ (2,129) ​ ​ — ​ ​ — ​ ​ (57) ​ ​ 69 ​ ​ (850) ​ ​ (2,323) Provision (recovery) (1) ​ (1,806) ​ (87) ​ 175 ​ 614 ​ (14,438) ​ 828 ​ (1,444) ​ 42 ​ (16,641) ​ ​ 13,945 ​ ​ (3,191) ​ (22,003) Balance at end of period March 31, 2022 ​ $ 46,002 ​ $ 586 ​ $ 13,671 ​ $ 5,616 ​ $ 25,358 ​ $ 21,899 ​ $ 3,903 ​ $ 607 ​ $ 49,094 ​ $ 96,360 ​ $ 37,300 ​ $ 300,396 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative allowance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collectively evaluated ​ $ 45,805 ​ $ 586 ​ $ 12,301 ​ $ 5,616 ​ $ 24,770 ​ $ 21,899 ​ $ 3,903 ​ $ 607 ​ $ 45,302 ​ $ 95,051 ​ $ 32,476 ​ $ 288,316 Individually evaluated ​ ​ 168 ​ ​ — ​ ​ 1,357 ​ ​ — ​ ​ 588 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,960 ​ ​ — ​ ​ 3,358 ​ ​ 8,431 Total quantitative allowance ​ ​ 45,973 ​ ​ 586 ​ ​ 13,658 ​ ​ 5,616 ​ ​ 25,358 ​ ​ 21,899 ​ ​ 3,903 ​ ​ 607 ​ ​ 48,262 ​ ​ 95,051 ​ ​ 35,834 ​ ​ 296,747 Qualitative allowance ​ ​ 29 ​ ​ — ​ ​ 13 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 832 ​ ​ 1,309 ​ ​ 1,466 ​ ​ 3,649 Balance at end of period March 31, 2022 ​ $ 46,002 ​ $ 586 ​ $ 13,671 ​ $ 5,616 ​ $ 25,358 ​ $ 21,899 ​ $ 3,903 ​ $ 607 ​ $ 49,094 ​ $ 96,360 ​ $ 37,300 ​ $ 300,396 (1) Provision for credit losses for unfunded commitments of $17.9 million was recorded during the first quarter of 2023, compared to a negative provision (recovery) for credit losses of ($142,000) , net of the provision for $3.4 million recorded for the unfunded commitments acquired from ACBI, recorded during the first quarter of 2022 that is not included in the above table.

Other Real Estate Owned and Ban

Other Real Estate Owned and Bank Properties Held for Sale	3 Months Ended
	Mar. 31, 2023
Other Real Estate Owned and Bank Properties Held for Sale
Other Real Estate Owned and Bank Premises Held for Sale	Note 8 — Other Real Estate Owned and Bank Properties Held for Sale ​ The following is a summary of information pertaining to OREO and Bank Properties Held for Sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ OREO ​ Bank Properties Held for Sale ​ Total Balance, December 31, 2022 $ 1,023 ​ $ 17,754 ​ $ 18,777 Additions, net ​ ​ 2,826 ​ ​ — ​ ​ 2,826 Write-downs ​ ​ — ​ ​ (409) ​ ​ (409) Sold ​ ​ (376) ​ ​ (621) ​ ​ (997) Balance, March 31, 2023 ​ $ 3,473 ​ $ 16,724 ​ $ 20,197 ​ At March 31, 2023, there were a total of six properties included in OREO 31, 2022. At March 31, 2023, there were a total of 31, 2022. At March 31, 2023, we had no residential real estate included in OREO and

Leases

Leases	3 Months Ended
	Mar. 31, 2023
Leases
Leases	​ ​ Note 9 — Leases ​ As of March 31, 2023 and December 31, 2022, we had operating right-of-use (“ROU”) assets of $104.7 million and $108.0 million, respectively, and operating lease liabilities of $112.4 million and $115.6 million, respectively. We maintain operating leases on land and buildings for some of our operating centers, branch facilities and ATM locations. Most leases include one or more . The exercise of renewal options is based on the sole judgment of management and what they consider to be reasonably certain given the environment today. Factors in determining whether an option is reasonably certain of exercise include, but are not limited to, the value of leasehold improvements, the value of renewal rate compared to market rates, and the presence of factors that would cause a significant economic penalty to us if the option is not exercised. Leases with an initial term of 12 months or less are not recorded on the balance sheet and instead are recognized in lease expense on a straight-line basis over the lease term. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ (Dollars in thousands) ​ March 31, ​ ​ 2023 2022 Lease Cost Components: ​ ​ ​ ​ ​ ​ ​ ​ Amortization of ROU assets - finance leases ​ $ 117 ​ $ 117 ​ ​ Interest on lease liabilities - finance leases ​ ​ 11 ​ ​ 13 ​ ​ Operating lease cost (cost resulting from lease payments) ​ ​ 4,240 ​ ​ 4,333 ​ ​ Short-term lease cost ​ ​ 109 ​ ​ 143 ​ ​ Variable lease cost (cost excluded from lease payments) ​ 634 ​ 437 ​ ​ Total lease cost ​ $ 5,111 ​ $ 5,043 ​ ​ Supplemental Cash Flow and Other Information Related to Leases: ​ ​ ​ ​ ​ ​ ​ ​ Finance lease - operating cash flows ​ $ 11 ​ $ 13 ​ ​ Finance lease - financing cash flows ​ ​ 110 ​ ​ 108 ​ ​ Operating lease - operating cash flows (fixed payments) ​ ​ 4,097 ​ ​ 4,181 ​ ​ Operating lease - operating cash flows (net change asset/liability) ​ ​ (3,287) ​ ​ (3,303) ​ ​ New ROU assets - operating leases ​ ​ — ​ ​ 12,428 ​ ​ New ROU assets - finance leases ​ ​ — ​ ​ — ​ ​ Weighted - average remaining lease term (years) - finance leases ​ ​ 5.18 ​ ​ 6.17 ​ ​ Weighted - average remaining lease term (years) - operating leases ​ 9.88 ​ ​ 10.47 ​ ​ Weighted - average discount rate - finance leases ​ ​ 1.7% ​ ​ 1.7% ​ ​ Weighted - average discount rate - operating leases ​ 3.0% ​ 3.0% ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease payments due: ​ ​ ​ ​ ​ ​ ​ ​ 2023 (excluding the quarter ended March 31, 2023) ​ $ 12,226 ​ ​ ​ ​ ​ 2024 ​ ​ 15,011 ​ ​ ​ ​ ​ 2025 ​ ​ 13,548 ​ ​ ​ ​ ​ 2026 ​ ​ 13,135 ​ ​ ​ ​ ​ 2027 ​ ​ 12,172 ​ ​ ​ ​ ​ Thereafter ​ ​ 66,550 ​ ​ ​ ​ ​ Total undiscounted cash flows ​ ​ 132,642 ​ ​ ​ ​ ​ Discount on cash flows ​ ​ (20,233) ​ ​ ​ ​ ​ Total operating lease liabilities ​ $ 112,409 ​ ​ ​ ​ ​ ​ As of March 31, 2023, the Company held a small number of finance leases assumed in connection to the CenterState merger completed in 2020. These leases are all real estate leases. Terms and conditions are similar to those real estate operating leases described above. Lease classifications from the acquired institutions were retained. At March 31, 2023, we did not maintain any leases with related parties, and determined that the number and dollar amount of our equipment leases was immaterial. As of March 31, 2023, we had additional operating leases that have not yet commenced.

Deposits

Deposits	3 Months Ended
	Mar. 31, 2023
Deposits
Deposits	Note 10 — Deposits ​ Our total deposits are comprised of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ (Dollars in thousands) 2023 2022 Noninterest-bearing checking ​ $ 12,422,583 ​ $ 13,168,656 ​ Interest-bearing checking ​ 8,316,023 ​ 8,955,519 ​ Savings ​ 3,156,214 ​ 3,464,351 ​ Money market ​ 8,388,275 ​ 8,342,111 ​ Time deposits ​ ​ 4,118,497 ​ ​ 2,419,986 ​ Total deposits ​ $ 36,401,592 ​ $ 36,350,623 ​ ​ At March 31, 2023 and December 31, 2022, we had $658.5 million and $464.9 million in certificates of deposits greater than $250,000, respectively. At March 31, 2023 and December 31, 2022, the Company held

Retirement Plans

Retirement Plans	3 Months Ended
	Mar. 31, 2023
Retirement Plans
Retirement Plans	Note 11 — Retirement Plans ​ The Company sponsors an employees’ savings plan under the provisions of the Internal Revenue Code Section 401(k). Electing employees are eligible to participate in the employees’ savings plan after attaining age . Plan participants elect to contribute portions of their annual base compensation as a before tax contribution. Employer contributions may be made from current or accumulated net profits. Participants may elect to contribute of annual base compensation as a before tax contribution. Employees participating in the plan received a of their salary. We expensed ​ Employees can enter the savings plan on or after the first day of each month. The employee may enter into a salary deferral agreement at any time to select an alternative deferral amount or to elect not to defer in the plan. If the employee does not elect an investment allocation, the plan administrator will select a retirement-based portfolio according to the employee’s number of years until normal retirement age. The plan’s investment valuations are generally provided on a daily basis.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2023
Earnings Per Common Share
Earnings Per Share	Note 12 — Earnings Per Share ​ Basic earnings per share is calculated by dividing net income by the weighted-average shares of common stock outstanding during each period, excluding non-vested restricted shares. Our diluted earnings per share is based on the weighted-average shares of common stock outstanding during each period plus the maximum dilutive effect of common stock issuable upon exercise of stock options or vesting of restricted stock units. Stock options and unvested restricted stock units are considered common stock equivalents and are only included in the calculation of diluted earnings per common share when their effect is dilutive. ​ The following table sets forth the computation of basic and diluted earnings per common share: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ ​ March 31, ​ (Dollars and shares in thousands, except for per share amounts) 2023 2022 Basic earnings per common share: ​ ​ ​ ​ ​ Net income ​ $ 139,926 ​ $ 100,329 ​ Weighted-average basic common shares ​ ​ 75,902 ​ ​ 71,447 ​ Basic earnings per common share ​ $ 1.84 ​ $ 1.40 ​ Diluted earnings per common share: ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 139,926 ​ $ 100,329 ​ Weighted-average basic common shares ​ ​ 75,902 ​ ​ 71,447 ​ Effect of dilutive securities ​ ​ 487 ​ ​ 664 ​ Weighted-average dilutive shares ​ ​ 76,389 ​ ​ 72,111 ​ Diluted earnings per common share ​ $ 1.83 ​ $ 1.39 ​ ​ The calculation of diluted earnings per common share excludes outstanding stock options for which the results would have been anti-dilutive under the treasury stock method as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ ​ 2023 2022 ​ Number of shares ​ ​ ​ ​ ​ 57,169 ​ ​ ​ ​ ​ 57,169 ​ Range of exercise prices ​ $ 87.30 to $ 91.35 ​ $ 87.30 to $ 91.35 ​ ​ ​

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2023
Share-Based Compensation
Share-Based Compensation	​ ​ Note 13 — Share-Based Compensation ​ Our 2004, 2012, 2019 and 2020 share-based compensation plans are long-term retention plans intended to attract, retain, and provide incentives for key employees and non-employee directors in the form of incentive and non-qualified stock options, restricted stock, and restricted stock units (“RSUs”). Our 2020 plan was adopted by our shareholders at our annual meeting on October 29, 2020. The Company also assumed the obligations of ACBI under various equity incentive plans pursuant to the acquisition of ACBI on March 1, 2022 and the obligations of CenterState under various equity incentive plans pursuant to the merger with CenterState on June 7, 2020. ​ Stock Options ​ With the exception of non-qualified stock options granted to directors under the 2004 and 2012 plans, which in some cases may be exercised at any time prior to expiration and in some other cases may be exercised at intervals less than a year following the grant date, incentive stock options granted under our 2004, 2012, 2019 and 2020 plans may not be exercised in whole or in part within a year following the date of the grant, as these incentive stock options become exercisable in 25% increments pro ratably over the four-year period following the grant date. The options are granted at an exercise price at least equal to the fair value of the common stock at the date of grant and expire from the date of grant. options were granted under the 2004, 2012 or 2019 plans after January 26, 2012, February 1, 2019, and October 29, 2020, respectively, and the plans are closed other than for any options still unexercised and outstanding. The 2020 plan is the only plan from which new share-based compensation grants may be issued. It is the Company’s policy to grant options out of the shares registered under the 2020 plan. Activity in the Company’s stock option plans is summarized in the following table. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ Aggregate ​ ​ ​ ​ ​ Average ​ Remaining ​ Intrinsic ​ ​ Shares Price (Yrs.) (000's) Outstanding at January 1, 2023 ​ 161,832 ​ $ 66.20 ​ ​ ​ ​ ​ ​ Exercised ​ (19,011) ​ 51.01 ​ ​ ​ ​ ​ Expired ​ (929) ​ ​ 33.09 ​ ​ ​ ​ ​ Outstanding at March 31, 2023 ​ 141,892 ​ 68.45 ​ 3.03 ​ $ 1,534 ​ Exercisable at March 31, 2023 ​ 141,892 ​ ​ 68.45 ​ 3.03 ​ $ 1,534 ​ ​ The fair value of options is estimated at the date of grant using the Black-Scholes option pricing model and expensed over the options’ vesting periods. There have been stock options issued during the first three months of 2023. Because all outstanding stock options had vested as of December 31, 2022, there was no unrecognized compensation cost related to nonvested stock option grants under the plans or fair value of shares vested for the year ended March 31, 2023. The intrinsic value of stock option shares exercised for the three months ended March 31, 2023 was ​ Restricted Stock ​ From time-to-time, we grant shares of restricted stock to key employees. These awards help align the interests of these employees with the interests of our shareholders by providing economic value directly related to increases in the value of our stock. The value of the stock awarded is established as the fair market value of the stock at the time of the grant. We recognize expenses equal to the total value of such awards, ratably over the vesting period of the stock grants. Restricted stock grants to employees generally vest ratably over a two ​ All restricted stock agreements are conditioned upon continued employment. Termination of employment prior to a vesting date, as described below, would terminate any interest in non-vested shares. Prior to vesting of the shares, as long as employed by the Company, the employees will have the right to vote such shares and to receive dividends paid with respect to such shares. All restricted shares will fully vest in the event of change in control of the Company or upon the death of the recipient. ​ Nonvested restricted stock for 2023 is summarized in the following table. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted- ​ ​ ​ ​ Average ​ ​ ​ ​ Grant-Date Restricted Stock ​ Shares ​ Fair Value Nonvested at January 1, 2023 50,506 ​ $ 89.12 ​ Vested (18,380) ​ 90.00 ​ Forfeited (2,233) ​ 90.00 ​ Nonvested at March 31, 2023 29,893 ​ $ 88.51 ​ ​ As of March 31, 2023, there was $1.8 million of total unrecognized compensation cost related to nonvested restricted stock granted under the plans. This cost is expected to be recognized over a weighted-average period of years as of March 31, 2023. The total fair value of shares vested during the three months ended March 31, 2023 was ​ Restricted Stock Units (“RSU”) ​ From time-to-time, we also grant performance RSUs and time-vested RSUs to key employees, and time-vested RSUs to non-employee directors. These awards help align the interests of these employees with the interests of our shareholders by providing economic value directly related to our performance. Some performance RSU grants contain a one two from the grant date). The performance-based awards for our long-term incentive plans are dependent on the achievement of tangible book value growth and return on average tangible common equity relative to the Company’s peer group during each performance period. Grants to non-employee directors typically vest within a 12-month period. We communicate threshold, target, and maximum performance RSU awards and performance targets to the applicable key employees at the beginning of a performance period. Due to the merger with CenterState on June 7, 2020, all legacy and assumed performance-based restricted stock units converted to a time-vesting requirement. With respect to some long-term incentive awards, dividend equivalents are accrued at the same rate as cash dividends paid for each share of the Company’s common stock during the performance or time-vested period, and subsequently paid when the shares are issued on the vesting or settlement date. The value of the RSUs awarded is established as the fair market value of the stock at the time of the grant. We recognize expense on a straight-line basis typically over the performance or time-vesting periods based upon the probable performance target, as applicable, that will be met. Outstanding RSUs for the three months ended March 31, 2023 is summarized in the following table. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted- ​ ​ ​ ​ Average ​ ​ ​ ​ Grant-Date Restricted Stock Units ​ Shares ​ Fair Value Outstanding at January 1, 2023 940,512 ​ $ 73.82 ​ Granted 328,343 ​ 76.05 ​ Vested ​ (177,708) ​ ​ 86.81 ​ Forfeited ​ (3,604) ​ ​ 75.92 ​ Outstanding at March 31, 2023 1,087,543 ​ $ 72.37 ​ ​ The nonvested shares of 1,087,543 at March 31, 2023 includes 89,682 shares that have fully vested but are subject to a two-year holding period, which commenced at the end of their respective vesting period. These vested shares will be released and issued into shares of common stock at the end of their respective two-year holding period, the last of which will end by March 31, 2025. As of March 31, 2023, there was $39.2 million of total unrecognized compensation cost related to nonvested RSUs granted under the plan. This cost is expected to be recognized over a weighted-average period of years as of March 31, 2023. The total fair value of RSUs vested and released during the three months ended March 31, 2023 was million.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	3 Months Ended
	Mar. 31, 2023
Commitments and Contingent Liabilities
Commitments and Contingent Liabilities	Note 14 — Commitments and Contingent Liabilities ​ In the normal course of business, we make various commitments and incur certain contingent liabilities, which are not reflected in the accompanying financial statements. The commitments and contingent liabilities include guarantees, commitments to extend credit, and standby letters of credit. At March 31, 2023, commitments to extend credit and standby letters of credit totaled billion. million and recorded on the Balance Sheet. ​ We have been named as defendant in various legal actions, arising from its normal business activities, in which damages in various amounts are claimed. We are also exposed to litigation risk related to the prior business activities of banks acquired through whole bank acquisitions. Although the amount of any ultimate liability with respect to such matters cannot be determined, in the opinion of management,

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2023
Fair Value.
Fair Value	Note 15 — Fair Value ​ GAAP defines fair value and establishes a framework for measuring and disclosing fair value. Fair value should be based on the assumptions market participants would use when pricing an asset or liability and establishes a fair value hierarchy that prioritizes the information used to develop those assumptions. ​ The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. Available for sale and trading securities, derivative contracts, mortgage loans held for sale, SBA servicing rights, and mortgage servicing rights (“MSRs”) are recorded at fair value on a recurring basis. Additionally, from time to time, we may be required to record at fair value other assets on a nonrecurring basis, such as impaired loans, OREO, bank properties held for sale, and certain other assets. These nonrecurring fair value adjustments typically involve application of lower of cost or market accounting or write-downs of individual assets. ​ FASB ASC Topic 820 establishes a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: ​ Level 1 Observable inputs such as quoted prices in active markets; Level 2 Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and Level 3 Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. ​ The following is a description of valuation methodologies used for assets recorded at fair value. ​ Trading Securities ​ The fair values of trading securities are determined as follows: (1) for those securities that have traded prior to the date of the Condensed Consolidated Balance Sheets but have not settled (date of sale) until after such date, the sales price is used as the fair value; and, (2) for those securities which have not traded as of the date of the Condensed Consolidated Balance Sheets, the fair value was determined by broker price indications of similar or same securities. ​ Investment Securities ​ Securities available for sale are valued on a recurring basis at quoted market prices where available. If quoted market prices are not available, fair values are based on quoted market prices of comparable securities. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange and The NASDAQ Stock Market. Level 2 securities include mortgage-backed securities and debentures issued by government agencies or sponsored entities, municipal bonds and corporate debt securities, or U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and money market funds. Securities held to maturity are valued at quoted market prices or dealer quotes similar to securities available for sale. The carrying value of FHLB and FRB stock approximates fair value based on the redemption provisions. Mortgage Loans Held for Sale ​ Mortgage loans held for sale are carried at fair value with changes in fair value recognized in current period earnings. The fair values of mortgage loans held for sale are based on commitments on hand from investors within the secondary market for loans with similar characteristics. As such, the fair value adjustments for mortgage loans held for sale are recurring Level 2. ​ Loans ​ We do not record loans at fair value on a recurring basis. However, from time to time, a loan may be individually evaluated for expected credit losses if it no longer shares similar risk characteristics with other pooled loans. Once a loan is identified as an individually evaluated loan, management measures expected credit losses using estimated fair value methodologies. The fair value of the individually evaluated loans is estimated using one of several methods, including collateral value, market value of similar debt, enterprise value, liquidation value and discounted cash flows. Those individually evaluated loans not requiring an ACL represent loans for which the fair value of the expected repayments or collateral exceed the recorded investments in such loans. At March 31, 2023, approximately two thirds of the individually evaluated loans were evaluated based on the fair value of the collateral because such loans were considered collateral dependent. Individually evaluated loans, where an allowance is established based on the fair value of collateral, requires classification in the fair value hierarchy. When the fair value of the collateral is based on an observable market price or a current appraised value, we consider the impaired loan as nonrecurring Level 2. When an appraised value is not available or management determines the fair value of the collateral is further impaired below the appraised value and there is no observable market price, we consider the individually evaluated loan as nonrecurring Level 3. ​ Other Real Estate Owned (“OREO”) ​ OREO, consisting of properties obtained through foreclosure or in satisfaction of loans, is typically reported at fair value, determined on the basis of current appraisals, comparable sales, and other estimates of value obtained principally from independent sources, and adjusted for estimated selling costs (Level 2). However, OREO is considered Level 3 in the fair value hierarchy because management has qualitatively applied a discount due to the size, supply of inventory, and the incremental discounts applied to the appraisals. Management also considers other factors, including changes in absorption rates, length of time the property has been on the market and anticipated sales values, which have resulted in adjustments to the collateral value estimates indicated in certain appraisals. At the time of foreclosure, any excess of the loan balance over the fair value of the real estate held as collateral is treated as a charge against the ACL. Gains or losses on sale and generally any subsequent adjustments to the value are recorded as a component of OREO Expense and Loan Related Expense in the Condensed Consolidated Statements of Net Income. ​ Bank Property Held for Sale ​ Bank property held for sale consists of locations that management has identified as no longer needed and reclassified from bank properties. These properties are typically reported at fair value, determined on the basis of current appraisals, comparable sales, and other estimates of value obtained principally from independent sources, and adjusted for estimated selling costs (Level 2). However, bank property held for sale is considered Level 3 in the fair value hierarchy because management has qualitatively applied a discount due to the size, supply of inventory, restrictions and the incremental discounts applied to the appraisals. Management also considers other factors, including changes in absorption rates, length of time the property has been on the market and anticipated sales values, which have resulted in adjustments to the collateral value estimates indicated in certain appraisals. At the time a property is identified as held for sale, any excess of the book balance over the fair value of the real estate is treated as a charge against earnings. Gains or losses on sale and generally any subsequent write-downs to the value are recorded as a component in Other Expense in the Condensed Consolidated Statements of Net Income. ​ Derivative Financial Instruments ​ Fair value is estimated using pricing models of derivatives with similar characteristics or discounted cash flow models where future floating cash flows are projected and discounted back; and accordingly, these derivatives are classified within Level 2 of the fair value hierarchy (See Note 17 — Derivative Financial Instruments for additional information). Mortgage Servicing Rights (“MSRs”) and SBA Servicing Asset The estimated fair value of MSRs and SBA servicing asset is obtained through a third-party vendor analysis of future cash flows. In early 2022 and in connection with the SBA servicing asset acquired through the Atlantic Capital acquisition, the Company began using a third-party vendor analysis of future cash flows to determine the fair value of the SBA servicing asset. Previously, the SBA servicing asset was recorded at amortized cost. The valuations for the servicing assets use assumptions market participants would use in determining fair value including market discount rates, prepayment speeds, servicing income, servicing costs, default rates and other market driven data, as well as the market’s perception of future interest rate movements. MSRs and SBA servicing asset are classified as Level 3. Assets and Liabilities Recorded at Fair Value on a Recurring Basis ​ The table below presents the recorded amount of assets and liabilities measured at fair value on a recurring basis: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices ​ ​ ​ ​ ​ ​ ​ ​ ​ In Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs (Dollars in thousands) ​ Fair Value ​ (Level 1) ​ (Level 2) ​ (Level 3) March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivative financial instruments ​ $ 159,287 ​ $ — ​ $ 159,287 ​ $ — Loans held for sale ​ 27,289 ​ — ​ 27,289 ​ — Trading securities ​ 16,039 ​ — ​ 16,039 ​ — Securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ ​ 268,096 ​ ​ — ​ ​ 268,096 ​ ​ — U.S. Government agencies ​ ​ 220,259 ​ ​ — ​ ​ 220,259 ​ ​ — Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,673,162 ​ ​ — ​ ​ 1,673,162 ​ ​ — Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 591,412 ​ ​ — ​ ​ 591,412 ​ ​ — Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 987,437 ​ ​ — ​ ​ 987,437 ​ ​ — State and municipal obligations ​ 966,957 ​ — ​ 966,957 ​ — Small Business Administration loan-backed securities ​ 425,492 ​ — ​ 425,492 ​ — Corporate securities ​ ​ 27,184 ​ ​ — ​ ​ 27,184 ​ ​ — Total securities available for sale ​ 5,159,999 ​ — ​ 5,159,999 ​ — Mortgage servicing rights ​ 85,406 ​ — ​ — ​ 85,406 SBA servicing asset ​ ​ 6,521 ​ ​ — ​ ​ — ​ ​ 6,521 ​ ​ $ 5,454,541 ​ $ — ​ $ 5,362,614 ​ $ 91,927 Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivative financial instruments ​ $ 806,584 ​ $ — ​ $ 806,584 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivative financial instruments ​ $ 211,016 ​ $ — ​ $ 211,016 ​ $ — Loans held for sale ​ 28,968 ​ — ​ 28,968 ​ — Trading securities ​ 31,263 ​ — ​ 31,263 ​ — Securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ ​ 265,638 ​ ​ — ​ ​ 265,638 ​ ​ — U.S. Government agencies ​ ​ 219,088 ​ ​ — ​ ​ 219,088 ​ ​ — Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,698,353 ​ ​ — ​ ​ 1,698,353 ​ ​ — Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 601,045 ​ ​ — ​ ​ 601,045 ​ ​ — Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,000,398 ​ ​ — ​ ​ 1,000,398 ​ ​ — State and municipal obligations ​ 1,064,852 ​ — ​ 1,064,852 ​ — Small Business Administration loan-backed securities ​ 444,810 ​ — ​ 444,810 ​ — Corporate securities ​ 32,638 ​ — ​ 32,638 ​ — Total securities available for sale ​ 5,326,822 ​ — ​ 5,326,822 ​ — Mortgage servicing rights ​ 86,610 ​ — ​ — ​ 86,610 SBA servicing asset ​ ​ 6,068 ​ ​ — ​ ​ — ​ ​ 6,068 ​ ​ $ 5,690,747 ​ $ — ​ $ 5,598,069 ​ $ 92,678 Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivative financial instruments ​ $ 1,034,143 ​ $ — ​ $ 1,034,143 ​ $ — ​ Changes in Level 1, 2 and 3 Fair Value Measurements ​ When a determination is made to classify a financial instrument within Level 3 of the valuation hierarchy, the determination is based upon the significance of the unobservable factors to the overall fair value measurement. However, since Level 3 financial instruments typically include, in addition to the unobservable or Level 3 components, observable components (that is, components that are actively quoted and can be validated to external sources), the gains and losses below include changes in fair value due in part to observable factors that are part of the valuation methodology. There were no changes in hierarchy classifications of Level 3 assets or liabilities for the three months ended March 31, 2023. A reconciliation of the beginning and ending balances of Level 3 assets and liabilities recorded at fair value on a recurring basis for the three months ended March 31, 2023 is as follows: ​ ​ ​ ​ ​ ​ (Dollars in thousands) MSRs Fair value, January 1, 2023 ​ $ 86,610 ​ Servicing assets that resulted from transfers of financial assets ​ 1,494 ​ Changes in fair value due to valuation inputs or assumptions ​ (1,289) ​ Changes in fair value due to decay ​ (1,409) ​ Fair value, March 31, 2023 ​ $ 85,406 ​ ​ In 2022, the Company elected to prospectively apply fair value accounting to the Company’s SBA servicing asset, which is considered a Level 3 asset. A reconciliation of the beginning and ending balances of the SBA servicing asset recorded at fair value on a recurring basis for the period ending March 31, 2023 is as follows: ​ ​ ​ ​ ​ ​ (Dollars in thousands) SBA Servicing Asset Fair value, January 1, 2023 ​ $ 6,068 ​ Servicing assets that resulted from transfers of financial assets ​ ​ 334 ​ Changes in fair value due to decay ​ ​ (236) ​ Changes in fair value due to valuation inputs or assumptions ​ ​ 355 ​ Fair value, March 31, 2023 ​ $ 6,521 ​ ​ There were no unrealized losses included in accumulated other comprehensive income related to Level 3 financial assets and liabilities at March 31, 2023. ​ Assets and Liabilities Recorded at Fair Value on a Nonrecurring Basis ​ The tables below present the recorded amount of assets and liabilities measured at fair value on a nonrecurring basis: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices ​ ​ ​ ​ ​ ​ ​ ​ ​ In Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs (Dollars in thousands) ​ Fair Value ​ (Level 1) ​ (Level 2) ​ (Level 3) March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OREO ​ $ 3,473 ​ $ — ​ $ — ​ $ 3,473 ​ Bank properties held for sale ​ ​ 16,724 ​ ​ — ​ — ​ ​ 16,724 ​ Individually evaluated loans ​ 28,650 ​ — ​ — ​ 28,650 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OREO ​ $ 1,023 ​ $ — ​ $ — ​ $ 1,023 ​ Bank properties held for sale ​ ​ 17,754 ​ ​ — ​ — ​ ​ 17,754 ​ Individually evaluated loans ​ 20,802 ​ — ​ — ​ 20,802 ​ ​ Quantitative Information about Level 3 Fair Value Measurement ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ Valuation Technique Unobservable Input 2023 2022 Nonrecurring measurements: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated loans Discounted appraisals and discounted cash flows Collateral discounts ​ 24 % ​ 31 % OREO and Bank properties held for sale Discounted appraisals Collateral discounts and estimated costs to sell ​ 15 % ​ 16 % ​ Fair Value of Financial Instruments ​ We used the following methods and assumptions in estimating our fair value disclosures for financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those models are significantly affected by the assumptions used, including the discount rates and estimates of future cash flows. In that regard, the derived fair value estimates cannot be substantiated by comparison to independent markets and, in many cases, could not be realized in immediate settlement of the instrument. The use of different methodologies may have a material effect on the estimated fair value amounts. The fair value estimates presented herein are based on pertinent information available to management as of March 31, 2023 and December 31, 2022. Such amounts have not been revalued for purposes of these consolidated financial statements since those dates and, therefore, current estimates of fair value may differ significantly from the amounts presented herein. ​ The following methods and assumptions were used to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value: ​ Cash and Cash Equivalents Trading Securities The fair values of trading securities are determined as follows: (1) for those securities that have traded prior to the date of the Consolidated Balance Sheets but have not settled (date of sale) until after such date, the sales price is used as the fair value; and, (2) for those securities which have not traded as of the date of the consolidated balance sheet, the fair value was determined by broker price indications of similar or same securities. ​ Investment Securities — Securities available for sale are valued at quoted market prices or dealer quotes. Securities held to maturity are valued at quoted market prices or dealer quotes similar to securities available for sale. The carrying value of FHLB and FRB stock approximates fair value based on the redemption provisions. The carrying value of our investment in unconsolidated subsidiaries approximates fair value. See Note 5 — Investment Securities for additional information, as well as page 33 regarding fair value. ​ Loans held for sale ​ Loans — The fair value of loans is based on an exit price. To estimate an exit price, all loans (fixed and variable) are being valued with a discounted cash flow analyses for loans that includes our estimate of future credit losses expected to be incurred over the life of the loans. Fair values for certain mortgage loans (e.g., one-to-four family residential) and other consumer loans are estimated using discounted cash flow analyses based on our current rates offered for new loans of the same type, structure and credit quality. Fair values for other loans (e.g., commercial real estate and investment property mortgage loans, commercial and industrial loans) are estimated using discounted cash flow analyses-using interest rates we currently offer for loans with similar terms to borrowers of similar credit quality. Fair values for non-performing loans are estimated using a discounted cash flow analysis. ​ Deposit Liabilities — The fair values disclosed for demand deposits (e.g., interest and non-interest bearing checking, passbook savings, and certain types of money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (i.e., their carrying amounts). The carrying amounts of variable-rate, fixed-term money market accounts, and certificates of deposit approximate their fair values at the reporting date. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies interest rates currently being offered on certificates to a schedule of aggregated expected monthly maturities on time deposits. ​ Federal Funds Purchased and Securities Sold Under Agreements to Repurchase ​ Other Borrowings ​ Accrued Interest ​ Derivative Financial Instruments ​ Commitments to Extend Credit, Standby Letters of Credit and Financial Guarantees — The fair values of commitments to extend credit are estimated taking into account the remaining terms of the agreements and the present creditworthiness of the counterparties. For fixed-rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. The fair values of guarantees and letters of credit are based on fees currently charged for similar agreements or on the estimated costs to terminate them or otherwise settle the obligations with the counterparties at the reporting date. The estimated fair value, and related carrying amount, of our financial instruments are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Fair ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ Amount ​ Value ​ Level 1 ​ Level 2 ​ Level 3 March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 1,996,662 ​ $ 1,996,662 ​ $ 1,996,662 ​ $ — ​ $ — ​ Trading securities ​ ​ 16,039 ​ ​ 16,039 ​ ​ — ​ ​ 16,039 ​ ​ — ​ Investment securities ​ 8,014,663 ​ 7,567,328 ​ 179,717 ​ 7,387,611 ​ — ​ Loans held for sale ​ ​ 27,289 ​ ​ 27,289 ​ ​ — ​ ​ 27,289 ​ ​ — ​ Loans, net of allowance for credit losses ​ 30,325,497 ​ 29,646,800 ​ — ​ — ​ 29,646,800 ​ Accrued interest receivable ​ 138,515 ​ 138,515 ​ — ​ 26,888 ​ 111,627 ​ Mortgage servicing rights ​ 85,406 ​ 85,406 ​ — ​ — ​ 85,406 ​ SBA servicing asset ​ ​ 6,521 ​ ​ — ​ ​ — ​ ​ — ​ ​ 6,521 ​ Interest rate swap - non-designated hedge ​ 157,014 ​ 157,014 ​ — ​ 157,014 ​ — ​ Other derivative financial instruments (mortgage banking related) ​ 2,273 ​ 2,273 ​ — ​ 2,273 ​ — ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 36,401,592 ​ 36,333,275 ​ — ​ 36,333,275 ​ — ​ Federal funds purchased and securities sold under agreements to repurchase ​ 544,108 ​ 556,417 ​ — ​ 556,417 ​ — ​ Corporate and subordinated debentures ​ ​ 392,182 ​ ​ 380,925 ​ ​ — ​ 380,925 ​ — ​ Other borrowings ​ 900,000 ​ 900,000 ​ — ​ 900,000 ​ — ​ Accrued interest payable ​ 20,411 ​ 20,411 ​ — ​ 20,411 ​ — ​ Interest rate swap - non-designated hedge ​ 806,584 ​ 806,584 ​ — ​ 806,584 ​ — ​ Other derivative financial instruments (mortgage banking related) ​ — ​ — ​ — ​ — ​ — ​ Off balance sheet financial instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commitments to extend credit ​ — ​ (255,022) ​ — ​ (255,022) ​ — ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 1,312,563 ​ $ 1,312,563 ​ $ 1,312,563 ​ $ — ​ $ — ​ Trading securities ​ ​ 31,263 ​ ​ 31,263 ​ ​ — ​ ​ 31,263 ​ ​ — ​ Investment securities ​ 8,189,780 ​ 7,756,707 ​ 179,717 ​ 7,576,990 ​ — ​ Loans held for sale ​ ​ 28,968 ​ ​ 28,968 ​ ​ — ​ ​ 28,968 ​ ​ — ​ Loans, net of allowance for credit losses ​ 29,821,418 ​ 29,329,499 ​ — ​ — ​ 29,329,499 ​ Accrued interest receivable ​ 134,594 ​ 134,594 ​ — ​ 28,449 ​ 106,145 ​ Mortgage servicing rights ​ 86,610 ​ 86,610 ​ — ​ — ​ 86,610 ​ SBA servicing asset ​ ​ 6,068 ​ ​ — ​ ​ — ​ ​ — ​ ​ 6,068 ​ Interest rate swap - non-designated hedge ​ 210,216 ​ 210,216 ​ — ​ 210,216 ​ — ​ Other derivative financial instruments (mortgage banking related) ​ 800 ​ 800 ​ — ​ 800 ​ — ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 36,350,623 ​ 36,264,401 ​ — ​ 36,264,401 ​ — ​ Federal funds purchased and securities sold under agreements to repurchase ​ 556,417 ​ 556,417 ​ — ​ 556,417 ​ — ​ Corporate and subordinated debentures ​ 392,275 ​ 377,360 ​ — ​ 377,360 ​ — ​ Accrued interest payable ​ 6,218 ​ 6,218 ​ — ​ 3,345 ​ — ​ Interest rate swap - non-designated hedge ​ 1,033,980 ​ 1,033,980 ​ — ​ 1,033,980 ​ — ​ Other derivative financial instruments (mortgage banking related) ​ ​ 163 ​ ​ 163 ​ — ​ 163 ​ — ​ Off balance sheet financial instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commitments to extend credit ​ ​ — ​ (184,801) ​ — ​ (184,801) ​ — ​ ​

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)	​ Note 16 — Accumulated Other Comprehensive Income (Loss) ​ The changes in each component of accumulated other comprehensive loss, net of tax, were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gains and ​ ​ ​ ​ ​ Benefit ​ (Losses) on Securities ​ ​ ​ (Dollars in thousands) ​ Plans ​ Available for Sale ​ Total Three Months Ended March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at December 31, 2022 ​ $ (673) ​ $ (676,415) ​ $ (677,088) Other comprehensive income before reclassifications ​ — ​ 63,271 ​ 63,271 Amounts reclassified from accumulated other comprehensive loss ​ — ​ 33 ​ 33 Net comprehensive income ​ — ​ 63,304 ​ 63,304 Balance at March 31, 2023 ​ $ (673) ​ $ (613,111) ​ $ (613,784) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at December 31, 2021 ​ $ 57 ​ $ (21,203) ​ $ (21,146) Other comprehensive loss before reclassifications ​ — ​ (272,810) ​ ​ (272,810) Net comprehensive loss ​ — ​ (272,810) ​ (272,810) Balance at March 31, 2022 ​ $ 57 ​ $ (294,013) ​ $ (293,956) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount Reclassified from Accumulated Other Comprehensive Income (Loss) ​ ​ (Dollars in thousands) ​ For the Three Months Ended March 31, ​ ​ Accumulated Other Comprehensive Income (Loss) Component 2023 2022 Income Statement Line Item Affected Gains on sales of available for sale securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 45 ​ $ — ​ Securities gains, net ​ ​ ​ (12) ​ ​ — ​ Provision for income taxes ​ ​ ​ 33 ​ ​ — ​ Net income Total reclassifications for the period ​ $ 33 ​ $ — ​ ​ ​

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2023
Derivative Financial Instruments
Derivative Financial Instruments	Note 17 — Derivative Financial Instruments ​ The Company uses certain derivative instruments to meet the needs of customers as well as to manage the interest rate risk associated with certain transactions. The following table summarizes the derivative financial instruments used by the Company: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ ​ December 31, 2022 ​ ​ Balance Sheet ​ Notional ​ Estimated Fair Value ​ Notional ​ Estimated Fair Value (Dollars in thousands) Location Amount Gain Loss Amount Gain Loss ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair value hedge of interest rate risk: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pay fixed rate swap with counterparty ​ Other Assets and Other Liabilities ​ $ 12,186 ​ $ 206 ​ $ — ​ $ 12,289 ​ $ 414 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Not designated hedges of interest rate risk: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Customer related interest rate contracts: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Matched interest rate swaps with borrowers ​ Other Assets and Other Liabilities ​ ​ 10,701,004 ​ ​ 28,580 ​ ​ 805,749 ​ ​ 10,480,171 ​ ​ 8,539 ​ ​ 1,033,980 Matched interest rate swaps with counterparty ​ Other Assets and Other Liabilities ​ ​ 10,606,749 ​ ​ 128,227 ​ ​ 835 ​ ​ 10,400,733 ​ ​ 201,263 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Not designated hedges of interest rate risk - mortgage banking activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Contracts used to hedge mortgage servicing rights ​ Other Assets and Other Liabilities ​ ​ 67,500 ​ ​ 1,158 ​ ​ — ​ ​ 35,000 ​ ​ — ​ ​ 163 Contracts used to hedge mortgage pipeline ​ Other Assets ​ ​ 100,500 ​ ​ 1,115 ​ ​ — ​ ​ 51,000 ​ ​ 800 ​ ​ — Total derivatives ​ ​ ​ $ 21,487,939 ​ $ 159,286 ​ $ 806,584 ​ $ 20,979,193 ​ $ 211,016 ​ $ 1,034,143 ​ Cash Flow Hedge of Interest Rate Risk The Company is exposed to interest rate risk in the course of its business operations and manages a portion of this risk through the use of derivative financial instruments, in the form of interest rate swaps. We account for interest rate swaps that are classified as cash flow hedges on the balance sheet at fair value. We had no cash flow hedges as of March 31, 2023 and December 31, 2022. For more information regarding the fair value of our derivative financial instruments, see Note 15 — Fair Value to these financial statements. For derivatives designated as hedging exposure to variable cash flows of a forecasted transaction (cash flow hedge), the derivative’s entire gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings or when the hedged instrument and related swap are terminated before maturity. For derivatives that are not designated as hedging instruments, changes in the fair value of the derivatives are recognized in earnings immediately. Historically, for designated hedging relationships, we have had a third-party perform retrospective and prospective effectiveness testing on a quarterly basis using quantitative methods to determine if the hedge is still highly effective. Hedge accounting ceases on transactions that are no longer deemed highly effective, or for which the derivative has been terminated or de-designated. The Company did not maintain any cash flow hedges on the balance sheet throughout the three months ended March 31, 2023 and year ended December 31, 2022 (See Note 16—Accumulated Other Comprehensive Income (Loss) for activity in accumulated comprehensive income (loss) and the amounts reclassified into earnings). ​ Credit risk related to the derivative arises when amounts receivable from the counterparty (derivatives dealer) exceed those payable. We control the risk of loss by only transacting with derivatives dealers that are national market makers whose credit ratings are strong. Each party to the interest rate swap is required to provide collateral in the form of cash or securities to the counterparty when the counterparty’s exposure to a mark-to-market replacement value exceeds certain negotiated limits. These limits are typically based on current credit ratings and vary with ratings changes. With the Company not maintaining any cash flow hedges at March 31, 2023 and December 31, 2022, there was collateral pledged. Balance Sheet Fair Value Hedge ​ As of March 31, 2023 and December 31, 2022, the Company maintained loan swaps, with an aggregate notional amount of $12.2 million and $12.3 million, respectively, accounted for as fair value hedges. This derivative protects us from interest rate risk caused by changes in the LIBOR curve in relation to a certain designated fixed rate loan. The derivative converts the fixed rate loan to a floating rate. Settlement occurs in any given period where there is a difference in the stated fixed rate and variable rate and the difference is recorded in net interest income . The fair value of this hedge is recorded in either other assets or in other liabilities depending on the position of the hedge with the offset recorded in loans. ​ Non-designated Hedges of Interest Rate Risk ​ Customer Swap ​ The Company maintains interest rate swap contracts with customers that are classified as non-designated hedges and are not speculative in nature. These agreements are designed to convert customer’s variable rate loans with the Company to fixed rate. These interest rate swaps are executed with loan customers to facilitate a respective risk management strategy and allow the customer to pay a fixed rate of interest to the Company. These interest rate swaps are simultaneously hedged by executing offsetting interest rate swaps with unrelated market counterparties to minimize the net risk exposure to the Company resulting from the transactions and allow the Company to receive a variable rate of interest. The interest rate swaps pay and receive interest based on a floating rate based on one month LIBOR plus credit spread, with payments being calculated on the notional amount. The Company is in the process of implementing a plan to transition these interest rate swap contracts to a reference rate other than LIBOR. For discussion related to reference rate reform, please refer to Issued But Not Yet Adopted Accounting Standards within Note 2—Summary of Significant Accounting Policies. The interest rate swaps are settled monthly with varying maturities. ​ The variation margin settlement payment and the related derivative instruments fair value are considered a single unit of account for accounting and financial reporting purposes. Depending on the net position of the swaps with LCH and CME, the fair value, net of the variation margin, is reported in Derivative Assets or Derivative Liabilities on the Condensed Consolidated Balance Sheets. In addition, the expense or income attributable to the variation margin for the centrally cleared swaps with LCH and CME is reported in Noninterest Income, specifically within Correspondent and Capital Markets Income. The daily settlement of the derivative exposure does not change or reset the contractual terms of the instrument. ​ ​ As the interest rate swaps associated with this program do not meet the strict hedge accounting requirements, changes in the fair value of both the customer swaps and the offsetting swaps are recognized directly in earnings. As of March 31, 2023 and December 31, 2022, the interest rate swaps had an aggregate notional amount of approximately billion, respectively. At March 31, 2023, the fair value of the interest rate swap derivatives is recorded in other assets at billion. The fair value of derivative assets at December 31, 2022 was reduced by million in variation margin payments applicable to swaps centrally cleared through LCH and CME. All changes in fair value are recorded through earnings within Correspondent and Capital Markets Income, a component of Noninterest Income on the Condensed Consolidated Statements of Net Income. recorded on these derivatives for the year ended March 31, 2023. There was a net gain of recorded on these derivatives for the quarter ended March 31, 2022. As of March 31, 2023, we provided million of cash collateral on the customer swaps, which is included in Cash and Cash Equivalents on the Condensed Consolidated Balance Sheets as Deposits in Other Financial Institutions (Restricted Cash). We also provided million in investment securities at market value as collateral on the customer swaps which is included in Investment Securities – available for sale on the Condensed Consolidated Balance Sheets. Counterparties provided ​ Foreign Exchange ​ The Company may enter into foreign exchange contracts with customers to accommodate their need to convert certain foreign currencies into U.S. Dollars. To offset the foreign exchange risk, the Company may enter into substantially identical agreements with an unrelated market counterparty to hedge these foreign exchange contracts. At March 31, 2023 and December 31, 2022, there were no outstanding contracts or agreements related to foreign currency. If there were foreign currency contracts outstanding at March 31, 2023, the fair value of these contracts would be included in Other Assets and Other Liabilities in the accompanying Condensed Consolidated Balance Sheets. All changes in fair value are recorded as other noninterest income. There was ​ Mortgage Banking ​ The Company also has derivatives contracts that are not classified as accounting hedges to mitigate risks related to the Company’s mortgage banking activities. These instruments may include financial forwards, futures contracts, and options written and purchased, which are used to hedge MSRs; while forward sales commitments are typically used to hedge the mortgage pipeline. Such instruments derive their cash flows, and therefore their values, by reference to an underlying instrument, index or referenced interest rate. The Company does not elect hedge accounting treatment for any of these derivative instruments and as a result, changes in fair value of the instruments (both gains and losses) are recorded in the Company’s Condensed Consolidated Statements of Net Income in mortgage banking income. ​ Mortgage Servicing Rights (“MSRs”) ​ Derivatives contracts related to MSRs are used to help offset changes in fair value and are written in amounts referred to as notional amounts. Notional amounts provide a basis for calculating payments between counterparties but do not represent amounts to be exchanged between the parties and are not a measure of financial risk. On March 31, 2023, we had derivative financial instruments outstanding with notional amounts totaling 31, 2022. The estimated net fair value of the open contracts related to the MSRs was recorded as a gain of ​ Mortgage Pipeline ​ The following table presents our notional value of forward sale commitments and the fair value of those obligations along with the fair value of the mortgage pipeline related to the held for sale portfolio. ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) March 31, 2023 December 31, 2022 Mortgage loan pipeline ​ $ 107,831 ​ $ 40,850 ​ Expected closures ​ 90,737 ​ 37,210 ​ Fair value of mortgage loan pipeline commitments ​ 1,848 ​ 524 ​ Forward sales commitments ​ 100,500 ​ 51,000 ​ Fair value of forward commitments ​ (734) ​ 276 ​ ​

Capital Ratios

Capital Ratios	3 Months Ended
	Mar. 31, 2023
Capital Ratios
Capital Ratios	Note 18 — Capital Ratios ​ The Company is subject to regulations with respect to certain risk-based capital ratios. These risk-based capital ratios measure the relationship of capital to a combination of balance sheet and off-balance sheet risks. The values of both balance sheet and off-balance sheet items are adjusted based on the rules to reflect categorical credit risk. In addition to the risk-based capital ratios, the regulatory agencies have also established a leverage ratio for assessing capital adequacy. The leverage ratio is equal to Tier 1 capital divided by total consolidated on-balance sheet assets (minus amounts deducted from Tier 1 capital). The leverage ratio does not involve assigning risk weights to assets. ​ Under current regulations, the Company and the Bank are subject to a minimum ratio of common equity Tier 1 capital (“CET1”) to risk-weighted assets of 4.5% and a minimum required ratio of Tier 1 capital to risk-weighted assets of 6% . The minimum required leverage ratio is . The minimum required total capital to risk-weighted assets ratio is ​ In order to avoid restrictions on capital distributions and discretionary bonus payments to executives, under the new rules a covered banking organization is also required to maintain a “capital conservation buffer” in addition to its minimum risk-based capital requirements. This buffer is required to consist solely of CET1, and the buffer applies to all three risk-based measurements (CET1, Tier 1 capital and total capital). The capital conservation buffer became fully phased-in on January 1, 2019 and consists of an additional amount of Tier 1 common equity equal to The Bank is also subject to the regulatory framework for prompt corrective action, which identifies five capital categories for insured depository institutions (well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized) and is based on specified thresholds for each of the three risk-based regulatory capital ratios (CET1, Tier 1 capital and total capital) and for the leverage ratio. ​ The following table presents actual and required capital ratios as of March 31, 2023 and December 31, 2022 for the Company and the Bank under the current capital rules. Capital levels required to be considered well capitalized are based upon prompt corrective action regulations. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Required to be ​ ​ ​ ​ ​ ​ ​ Minimum Capital Considered Well ​ ​ Actual ​ Required - Basel III ​ Capitalized ​ (Dollars in thousands) Amount Ratio Capital Amount Ratio Capital Amount Ratio March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common equity Tier 1 to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 3,891,155 11.13 % $ 2,446,483 ​ 7.00 % $ 2,271,735 6.50 % SouthState Bank (the Bank) ​ 4,165,577 11.93 % 2,443,212 ​ 7.00 % 2,268,697 6.50 % Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 3,891,155 11.13 % 2,970,730 ​ 8.50 % 2,795,981 8.00 % SouthState Bank (the Bank) ​ 4,165,577 11.93 % 2,966,757 ​ 8.50 % 2,792,242 8.00 % Total capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 4,647,783 13.30 % 3,669,725 ​ 10.50 % 3,494,976 10.00 % SouthState Bank (the Bank) ​ 4,532,206 12.99 % 3,664,818 ​ 10.50 % 3,490,303 10.00 % Tier 1 capital to average assets (leverage ratio): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 3,891,155 9.05 % 1,719,404 ​ 4.00 % 2,149,255 5.00 % SouthState Bank (the Bank) ​ 4,165,577 9.70 % 1,718,633 ​ 4.00 % 2,148,291 5.00 % December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common equity Tier 1 to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 3,788,106 10.96 % $ 2,420,417 ​ 7.00 % $ 2,247,530 6.50 % SouthState Bank (the Bank) ​ 4,074,045 11.80 % 2,417,133 ​ 7.00 % 2,244,481 6.50 % Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 3,788,106 10.96 % 2,939,077 ​ 8.50 % 2,766,190 8.00 % SouthState Bank (the Bank) ​ 4,074,045 11.80 % 2,935,090 ​ 8.50 % 2,762,438 8.00 % Total capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 4,485,397 12.97 % 3,630,625 ​ 10.50 % 3,457,738 10.00 % SouthState Bank (the Bank) ​ 4,381,336 12.69 % 3,625,700 ​ 10.50 % 3,453,047 10.00 % Tier 1 capital to average assets (leverage ratio): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 3,788,106 8.72 % 1,736,991 ​ 4.00 % 2,171,239 5.00 % SouthState Bank (the Bank) ​ 4,074,045 9.39 % 1,736,330 ​ 4.00 % 2,170,412 5.00 % ​ As of March 31, 2023 and December 31, 2022, the capital ratios of the Company and the Bank were well in excess of the minimum regulatory requirements and exceeded the thresholds for the “well capitalized” regulatory classification. ​ In accordance with ASU No. 2016-13, applied the provisions of the standard using the modified retrospective method as a cumulative-effect adjustment to retained earnings. million. Instead of recognizing the effects from ASU 2016-13 at adoption, the standard included a transitional method option for recognizing the adoption date effects on the Company’s regulatory capital calculations over a three-year phase-in. In March 2020, in response to the COVID-19 pandemic, the regulatory agencies provided an additional transitional method option of a two-year deferral for the start of the three-year phase-in of the recognition of the adoption date effects of ASU 2016-13 along with an option to defer the current impact on regulatory capital calculations of ASU 2016-13 during the first two years (“5-year method”). Under this 5-year method, the Company would recognize an estimate of the previous incurred loss method for determining the allowance for credit losses in regulatory capital calculations and the difference from the CECL method would be deferred for two years. After two years, the effects from adoption date and the deferral difference from the first two years of applying CECL would be phased-in over three years using the straight-line method. The regulatory rules provided a one-time opportunity at the end of the first quarter of 2020 for covered banking organizations to choose its transition option for CECL. The Company chose the 5-year method and is deferring the recognition of the effects from adoption date and the CECL difference from the first two years of application. This amount was fixed as of December 31, 2021, and that amount began the three-year phase out in the first quarter of 2022 with being phased out in 2023.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2023
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets	​ ​ Note 19 — Goodwill and Other Intangible Assets ​ The carrying amount of goodwill was $1.9 billion at March 31, 2023 31, 2022. ​ The Company last completed its annual valuation of the carrying value of its goodwill as of October 31, 2022. We determined that impairment charge was necessary for each period end. We will continue to monitor the impact of the market conditions on the Company’s ​ The following is a summary of gross carrying amounts and accumulated amortization of other intangible assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ (Dollars in thousands) 2023 2022 Gross carrying amount ​ $ 275,321 ​ $ 274,869 ​ Accumulated amortization ​ (165,718) ​ (158,419) ​ ​ ​ $ 109,603 ​ $ 116,450 ​ ​ Amortization expense totaled $7.3 million for the quarter ended March 31, 2023, compared to $8.5 million for the quarter ended March 31, 2022. Other intangibles are amortized using either the straight-line method or an accelerated basis over their estimated useful lives, with lives generally between two In early 2022 and in connection with the SBA servicing asset acquired through the Atlantic Capital acquisition, which was recorded at fair value on acquisition date, the Company elected to prospectively apply fair value accounting to the Company’s SBA servicing asset. The change in fair value of the SBA servicing asset is recorded in SBA Income, a component of Noninterest Income on the Consolidated Statements of Income, during each applicable reporting period. As a result of the change in accounting treatment, the Company will no longer amortize the SBA servicing asset and therefore excluded the SBA servicing asset from the future amortization expense table presented below. The fair value of the SBA servicing asset was $6.5 million and $6.1 million, respectively, at March 31, 2023 and December 31, 2022. ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ ​ ​ ​ Quarter ending: ​ June 30, 2023 ​ $ 7,028 ​ September 30, 2023 ​ 6,616 ​ December 31, 2023 ​ 6,615 ​ March 31, 2024 ​ 6,003 ​ June 30, 2024 ​ ​ 5,739 ​ Thereafter ​ 71,082 ​ ​ ​ $ 103,083 ​ ​

Mortgage Loan Servicing, Origin

Mortgage Loan Servicing, Origination, and Loans Held for Sale	3 Months Ended
	Mar. 31, 2023
Mortgage Loan Servicing, Origination, and Loans Held for Sale
Mortgage Loan Servicing, Origination, and Loans Held for Sale	Note 20 — Mortgage Loan Servicing, Origination, and Loans Held for Sale ​ The portfolio of residential mortgages serviced for others, which is not included in the accompanying Condensed Consolidated Balance Sheets the portfolio of residential mortgages serviced for others, was $6.6 billion as of both March 31, 2023 and December 31, 2022. Servicing loans for others generally consists of collecting mortgage payments, maintaining escrow accounts and disbursing payments to investors. The amounts of contractually specified servicing fees we earned during the year ended March 31, 2023 and March 31, 2022 were million, respectively. Servicing fees are recorded in Mortgage Banking Income in our Condensed Consolidated Statements of Net Income. ​ At March 31, 2023 and December 31, 2022, MSRs were $85.4 million and $86.6 million on our Condensed Consolidated Balance Sheets, respectively. MSRs are recorded at fair value with changes in fair value recorded as a component of Mortgage Banking Income in the Condensed Consolidated Statements of Net Income. The market value adjustments related to MSRs recorded in Mortgage Banking Income for the year ended March 31, 2023 and March 31, 2022 were losses of million, respectively. The Company has used various free standing derivative instruments to mitigate the income statement effect of changes in fair value resulting from changes in market value adjustments, in addition to changes in valuation inputs and assumptions related to MSRs. ​ See Note 15 — Fair Value for the changes in fair value of MSRs. The following table presents the changes in the fair value of the MSR and offsetting hedge. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ (Dollars in thousands) March 31, 2023 March 31, 2022 (Decrease) increase in fair value of MSRs ​ $ (1,290) ​ $ 12,827 ​ Decay of MSRs ​ (1,409) ​ (2,230) ​ Gain (loss) related to derivatives ​ ​ 145 ​ ​ (11,838) ​ Net effect on Condensed Consolidated Statements of Net Income ​ $ (2,554) ​ $ (1,241) ​ ​ The fair value of MSRs is highly sensitive to changes in assumptions and is determined by estimating the present value of the asset’s future cash flows utilizing market-based prepayment rates, discount rates and other assumptions validated through comparison to trade information, industry surveys and with the use of independent third-party appraisals. Changes in prepayment speed assumptions have the most significant impact on the fair value of MSRs. Generally, as interest rates decline, mortgage loan prepayments accelerate due to increased refinance activity, which results in a decrease in the fair value of the MSR. Measurement of fair value is limited to the conditions existing and the assumptions utilized as of a particular point in time, and those assumptions may not be appropriate if applied at a different time. See Note 15 — Fair Value for additional information regarding fair value. ​ The characteristics and sensitivity analysis of the MSRs are included in the following table. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ ​ December 31, ​ ​ (Dollars in thousands) 2023 2022 Composition of residential loans serviced for others ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed-rate mortgage loans ​ ​ 100.0 % ​ ​ 100.0 % ​ Adjustable-rate mortgage loans ​ ​ — % ​ ​ — % ​ Total ​ ​ 100.0 % ​ ​ 100.0 % ​ Weighted average life ​ ​ 8.24 years ​ ​ 8.37 years ​ Constant Prepayment rate (CPR) ​ ​ 6.6 % ​ ​ 6.4 % ​ Weighted average discount rate ​ ​ 10.0 % ​ ​ 10.0 % ​ Effect on fair value due to change in interest rates ​ ​ ​ ​ ​ ​ ​ ​ ​ 25 basis point increase ​ $ 1,012 ​ ​ $ 774 ​ ​ 50 basis point increase ​ ​ 1,888 ​ ​ ​ 1,428 ​ ​ 25 basis point decrease ​ ​ (1,146) ​ ​ ​ (902) ​ ​ 50 basis point decrease ​ ​ (2,422) ​ ​ ​ (1,938) ​ ​ ​ The sensitivity calculations above are hypothetical and should not be considered predictive of future performance. Changes in fair value based on adverse changes in assumptions generally cannot be extrapolated because the relationship of the changes in assumptions to fair value may not be linear. The effects of an adverse variation in a particular assumption on the fair value of the MSRs as disclosed in the table above is calculated without changing any other assumptions. In reality, changes in one factor may result in adjusting other factors, which may magnify or contract the effects of the change. ​ Whole loan sales were $159.4 million for the year ended March 31, 2023, compared to $700.7 million for the year ended March 31, 2022. For March 31, 2023, ​ Loans held for sale have historically been comprised of residential mortgage loans awaiting sale in the secondary market, which generally settle in 15 to 45 days . Loans held for sale were 31, 2022, respectively.

Short-Term Borrowings

Short-Term Borrowings	3 Months Ended
	Mar. 31, 2023
Short-Term Borrowings
Repurchase Agreements	​ ​ Note 21 — Short-Term Borrowings ​ Securities Sold Under Agreements to Repurchase (“Repurchase agreements”) ​ Repurchase agreements represent funds received from customers, generally on an overnight or continuous basis, which are collateralized by investment securities owned or, at times, borrowed and re-hypothecated by the Company. Repurchase agreements are subject to terms and conditions of the master repurchase agreements between the Company and the client and are accounted for as secured borrowings. Repurchase agreements are included in federal funds purchased and securities sold under agreements to repurchase on the condensed consolidated balance sheets. At March 31, 2023 and December 31, 2022, our repurchase agreements totaled million, respectively. All of our repurchase agreements were overnight or continuous (until-further-notice) agreements at March 31, 2023 and December 31, 2022. These borrowings were collateralized with government, government-sponsored enterprise, or state and political subdivision-issued securities with a carrying value of 31, 2022, respectively. Declines in the value of the collateral would require us to increase the amounts of securities pledged. ​ Federal Funds Purchased ​ Federal funds purchased are generally overnight daily borrowings with no defined maturity date. At March 31, 2023 and December 31, 2022, our federal funds purchased totaled million, respectively. ​ Federal Home Loan Bank (“FHLB”) and Federal Reserve Bank (“FRB”) Borrowings ​ The Company has from time-to-time entered into borrowing agreements with the FHLB and FRB. Borrowings under these agreements are collateralized by stock in the FHLB, qualifying first and second mortgage residential loans, investment securities, and commercial real estate loans under a blanket-floating lien. ​ As of March 31, 2023, the Company had $900.0 million in outstanding FHLB borrowings with a weighted average interest rate of 5.07% . As of December 31, 2022, there were no outstanding FHLB borrowings. Net eligible loans of the Company pledged via a blanket lien to the FHLB for advances and letters of credit at March 31, 2023, were approximately million in collateral value. This allows the Company a total borrowing capacity at the FHLB of approximately billion. After accounting for letters of credit totaling March 31, 2023 outstanding borrowings with the FRB at March 31, 2023 or December 31, 2022.

Stock Repurchase Program

Stock Repurchase Program	3 Months Ended
	Mar. 31, 2023
Stock Repurchase Program
Stock Repurchase Program	Note 22 — Stock Repurchase Program On April 27, 2022, the Company’s Board of Directors approved a stock repurchase program (“2022 Stock Repurchase Program”) authorizing the Company to repurchase up to 3,750,000 of the Company’s common shares along with the remaining authorized shares of 370,021 from the Company’s 2021 stock repurchase program (“2021 Stock Repurchase Plan”) for a total authorization of 4,120,021 shares. The Company did t repurchase any shares through the 2022 Stock Repurchase Program during 2022 or during the first quarter of 2023. During the first quarter of 2022, before the approval of the 2022 Stock Repurchase Program, the Company repurchased a total of

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2023
Subsequent Events
Subsequent Events	Note 23 — Subsequent Events ​ On April 27, 2023, the Company announced the declaration of a quarterly cash dividend on its common stock at $0.50 per share. The dividend is payable on May 19, 2023 to shareholders of record as of May 12, 2023. ​

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2023
Summary of Significant Accounting Policies
Loans	Loans ​ Loans that management has originated and has the intent and ability to hold for the foreseeable future or until maturity or pay off generally are reported at their unpaid principal balances, less unearned income and net of any deferred loan fees and costs, including unamortized fair value discount or premium. Unearned income on installment loans is recognized as income over the terms of the loans by methods that generally approximate the interest method. Interest on other loans is calculated by using the simple interest method on daily balances of the principal amount outstanding. If the loan is prepaid, the remaining unamortized fees and costs are charged or credited to interest income. Amortization ceases for non-accrual loans. ​ We place non acquired loans and acquired loans on nonaccrual once reasonable doubt exists about the collectability of all principal and interest due. Generally, this occurs when principal or interest is 90 days or more past due, unless the loan is well secured and in the process of collection, and excludes factored receivables. For factored receivables, which are commercial trade credits rather than promissory notes, the Company’s practice, in most cases, is to charge-off unpaid recourse receivables when they become 90 days past due from the invoice due date and the non-recourse receivables when they become 120 days past due from the statement due date. Past due status is based on the contractual terms of the loan. In all cases, loans are placed on non-accrual or charged-off at an earlier date if collection of principal or interest is considered doubtful. ​ A loan is evaluated individually for loss when it is on nonaccrual and has a net book balance over $1 million. Large pools of homogeneous loans are collectively evaluated for loss and reserved at the pool level. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as nonaccrual, provided that management expects to collect all amounts due, including interest accrued at the contractual interest rate for the period of delay.
Allowance for Credit Losses ("ACL")	Allowance for Credit Losses (“ACL”) – Investment Securities Management uses a systematic methodology to determine its ACL for investment securities held to maturity. The ACL is a valuation account that is deducted from the amortized cost basis to present the net amount expected to be collected on the held to maturity portfolio. Management considers the effects of past events, current conditions, and reasonable and supportable forecasts on the collectability of the held to maturity investment portfolio. The Company’s estimate of its ACL involves a high degree of judgment; therefore, management’s process for determining expected credit losses may result in a range of expected credit losses. Management monitors the held to maturity portfolio to determine whether a valuation account should be recorded. As of March 31, 2023 and December 31, 2022, the Company had The Company follows its nonaccrual policy by reversing interest income in the income statement when the Company determines the interest for held to maturity securities is uncollectible. Therefore, management excludes the accrued interest receivable balance from the amortized cost basis in measuring expected credit losses on the investment securities and does not record an allowance for credit losses on accrued interest receivable. As of March 31, 2023 and December 31, 2022, the accrued interest receivables for all investment securities recorded in Other Assets were Each quarter, management evaluates impairment where there has been a decline in fair value below the amortized cost basis of a security to determine whether there is a credit loss associated with the decline in fair value. Management considers the nature of the collateral, potential future changes in collateral values, default rates, delinquency rates, third-party guarantees, credit ratings, interest rate changes since purchase, volatility of the security’s fair value and historical loss information for financial assets secured with similar collateral among other factors. Credit losses are calculated individually, rather than collectively, using a discounted cash flow method, whereby management compares the present value of expected cash flows with the amortized cost basis of the security. The credit loss component would be recognized through the Provision for Credit Losses in the Condensed Consolidated Statements of Net Income. ACL – Loans and Certain Off-Balance-Sheet Credit Exposures The ACL for loans held for investment reflects management’s estimate of credit losses that will result from the inability of our borrowers to make required loan payments. The Company makes adjustments to the ACL by recording a provision for or recovery of credit losses through earnings. Loans charged off are recorded as reductions to the ACL on the balance sheet and subsequent recoveries ​ Management uses systematic methodologies to determine its ACL for loans held for investment and certain off-balance-sheet credit exposures. The ACL is a valuation account that is deducted from the amortized cost basis to present the net amount expected to be collected on the loan portfolio. Management considers the effects of past events, current conditions, and reasonable and supportable forecasts on the collectability of the loan portfolio. The Company’s estimate of its ACL involves a high degree of judgment; therefore, management’s process for determining expected credit losses may result in a range of expected credit losses. The Company’s ACL recorded in the balance sheet reflects management’s best estimate within the range of expected credit losses. The Company recognizes in net income the amount needed to adjust the ACL for management’s current estimate of expected credit losses. ​ The Company’s ACL is calculated using collectively evaluated and individually evaluated loans. The ACL is measured on a collective pool basis when similar risk characteristics exist. Loans with similar risk characteristics are grouped into homogenous segments, or pools, for analysis. The Discounted Cash Flow (“DCF”) method is used for each loan in a pool, and the results are aggregated at the pool level. A periodic tendency to default and absolute loss given default are applied to a projective model of the loan’s cash flow while considering prepayment and principal curtailment effects. The analysis produces expected cash flows for each instrument in the pool by pairing loan-level term information (e.g., maturity date, payment amount, interest rate, etc.) with top-down pool assumptions (e.g., default rates and prepayment speeds). The Company has identified the following portfolio segments: Owner-Occupied Commercial Real Estate, Non-Owner Occupied Commercial Real Estate, Multifamily, Municipal, Commercial and Industrial, Commercial Construction and Land Development, Residential Construction, Residential Senior Mortgage, Residential Junior Mortgage, Revolving Mortgage, and Consumer and Other. ​ In determining the proper level of the ACL, management has determined that the loss experience of the Bank provides the best basis for its assessment of expected credit losses. The Company therefore used its own historical credit loss experience by each loan segment over an economic cycle, while excluding loss experience from certain acquired institutions (i.e., failed banks). For most of the segment models for collectively evaluated loans, the Company incorporated two or more macroeconomic drivers using a statistical regression modeling methodology. ​ Management considers forward-looking information in estimating expected credit losses. The Company subscribes to a third-party service which provides their quarterly macroeconomic baseline scenario and alternative scenarios for the United States economy. The baseline, along with the evaluation of alternative scenarios, is used by management to determine the best estimate within the range of expected credit losses. Management has evaluated the appropriateness of the reasonable and supportable forecast scenarios and has made adjustments as needed. For the contractual term that extends beyond the reasonable and supportable forecast period, the Company reverts to the long term mean of historical factors within four quarters using a straight-line approach. The Company generally uses a four-quarter forecast and a four-quarter reversion period. ​ Included in its systematic methodology to determine its ACL, management considers the need to qualitatively adjust expected credit losses for information not already captured in the loss estimation process. These qualitative adjustments either increase or decrease the quantitative model estimation (i.e., formulaic model results). Each period, the Company considers qualitative factors that are relevant within the qualitative framework that includes the following: 1) Lending Policy; 2) Economic conditions not captured in models; 3) Volume and Mix of Loan Portfolio; 4) Past Due Trends; 5) Concentration Risk; 6) External Factors; and 7) Model Limitations. ​ When a loan no longer shares similar risk characteristics with its segment, the asset is assessed to determine whether it should be included in another pool or should be individually evaluated. The Company’s threshold for individually evaluated loans includes all non-accrual loans with a net book balance in excess of million. Management will monitor the credit environment and make adjustments to this threshold in the future if warranted. Based on the threshold above, consumer financial assets will generally remain in pools unless they meet the dollar threshold. The expected credit losses on individually evaluated loans will be estimated based on discounted cash flow analysis unless the loan meets the criteria for use of the fair value of collateral, either by virtue of an expected foreclosure or through meeting the definition of collateral-dependent. Financial assets that have been individually evaluated can be returned to a pool for purposes of estimating the expected credit loss insofar as their credit profile improves and that the repayment terms were not considered to be unique to the asset. ​ Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures , prospectively that requires the elimination of TDR guidance. Management measures expected credit losses over the contractual term of a loan. When determining the contractual term, the Company considers expected prepayments but is precluded from considering expected extensions, renewals, or modifications. Longstanding TDR accounting rules were replaced as of January 1, 2023 with ASU No. 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures (See Note 3 Recent Accounting Pronouncements). In accordance with the adoption of ASU 2022-02, any loans modified to a borrower experiencing financial difficulty are reviewed by the Bank to determine if an interest rate reduction, a term extension, an other-than-insignificant payment delay, a principal forgiveness, or any combination of these has occurred. ​ Effective January 1, 2023, the ACL includes expected losses from modifications of receivables to borrowers experiencing financial difficulty. Losses on modifications of loans over million to borrowers experiencing financial difficulty are estimated on an individual basis. Because the effect of the remainder of modifications made to borrowers experiencing financial difficulty is already incorporated into the measurement methodologies used to estimate the allowance, they are accounted for as pooled loans. The effects of reasonably expected TDRs are no longer considered in the measurement of expected credit losses. Prior to the adoption of ASU No. 2022-02, when determining the contractual term, the Company considered expected prepayments but was precluded from considering expected extensions, renewals, or modifications, unless the Company reasonably expected it would execute a TDR with a borrower. In the event of a reasonably expected TDR, the Company factored the reasonably-expected TDR into the expected credit losses estimate. For consumer loans, the point at which a TDR was reasonably expected was when the Company approved the borrower’s application for a modification (i.e., the borrower qualifies for the TDR) or when the Credit Administration department approved loan concessions on substandard loans. For commercial loans, the point at which a TDR was reasonably expected was when the Company approved the loan for modification or when the Credit Administration department approved loan concessions on substandard loans. The Company used a discounted cash flow methodology for a TDR to calculate the effect of the concession provided to the borrower within the ACL. ​ For purchased credit-deteriorated, otherwise referred to herein as PCD, assets are defined as acquired individual financial assets (or acquired groups of financial assets with similar risk characteristics) that, as of the date of acquisition, have experienced a more-than-insignificant deterioration in credit quality since origination, as determined by the Company’s assessment. The Company records acquired PCD loans by adding the expected credit losses (i.e., allowance for credit losses) to the purchase price of the financial assets rather than recording through the provision for credit losses in the income statement. The expected credit loss, as of the acquisition day, of a PCD loan is added to the allowance for credit losses. The non-credit discount or premium is the difference between the unpaid principal balance and the amortized cost basis as of the acquisition date. Subsequent to the acquisition date, the change in the ACL on PCD loans is recognized through the Provision for Credit Losses in the Condensed Consolidated Statements of Net Income. The non-credit discount or premium is accreted or amortized, respectively, into interest income over the remaining life of the PCD loan on a level-yield basis. ​ The Company follows its nonaccrual policy by reversing contractual interest income in the income statement when the Company places a loan on nonaccrual status. Therefore, management excludes the accrued interest receivable balance from the amortized cost basis in measuring expected credit losses on the portfolio and does not record an allowance for credit losses on accrued interest receivable. As of March 31, 2023 and December 31, 2022, the accrued interest receivables for loans recorded in Other Assets were ​ The Company has a variety of assets that have a component that qualifies as an off-balance sheet exposure. These primarily include undrawn portions of revolving lines of credit and standby letters of credit. The expected losses associated with these exposures within the unfunded portion of the expected credit loss are recorded as a liability on the balance sheet. Management has determined that a majority of the Company’s off-balance sheet credit exposures are not unconditionally cancellable. Management completes funding studies based on historical data to estimate the percentage of unfunded loan commitments that will ultimately be funded to calculate the reserve for unfunded commitments. Management applies this funding rate, along with the loss factor rate determined for each pooled loan segment, to unfunded loan commitments, excluding unconditionally cancellable exposures and letters of credit, to arrive at the reserve for unfunded loan commitments. As of March 31, 2023 and December 31, 2022, the liabilities recorded for expected credit losses on unfunded commitments were million, respectively.
Reclassification and Correction	​ Reclassification and Correction ​ Certain amounts previously reported have been reclassified to conform to the current quarter’s presentation. Such reclassifications had no effect on net income and shareholders’ equity. ​ ​ The table below discloses the net change (increase or (decrease)) included in all the Condensed Consolidated Statements of Net Income line items in this Form 10-Q, as a result of the change in accounting treatment. There was no impact to Net Income or Shareholders’ Equity as previously reported. ​ ​ ​ ​ ​ (Dollars in thousands) ​ Three Months Ended March 31, ​ INCOME STATEMENT 2022 ​ Interest income: ​ ​ ​ ​ Effect to interest income on federal funds sold and interest-earning ​ ​ ​ deposits with banks ​ $ 7 ​ Net effect to interest income ​ ​ 7 ​ Effect to interest expense on deposits ​ ​ (37) ​ Net effect to interest expense ​ ​ (37) ​ Net effect to net interest income $ 44 ​ ​ ​ ​ ​ Noninterest Income: ​ ​ ​ ​ Effect to correspondent banking and capital market income ​ $ (44) ​ Net effect to noninterest income ​ $ (44) ​ Net effect to net income ​ $ — ​ ​

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2023
Summary of Significant Accounting Policies
Net Changes Included in the Condensed Consolidated Statements of Income	​ ​ ​ ​ ​ (Dollars in thousands) ​ Three Months Ended March 31, ​ INCOME STATEMENT 2022 ​ Interest income: ​ ​ ​ ​ Effect to interest income on federal funds sold and interest-earning ​ ​ ​ deposits with banks ​ $ 7 ​ Net effect to interest income ​ ​ 7 ​ Effect to interest expense on deposits ​ ​ (37) ​ Net effect to interest expense ​ ​ (37) ​ Net effect to net interest income $ 44 ​ ​ ​ ​ ​ Noninterest Income: ​ ​ ​ ​ Effect to correspondent banking and capital market income ​ $ (44) ​ Net effect to noninterest income ​ $ (44) ​ Net effect to net income ​ $ — ​

Mergers and Acquisitions (Table

Mergers and Acquisitions (Tables) - Atlantic Capital	3 Months Ended
	Mar. 31, 2023
Mergers and Acquisitions
Schedule of assets acquired, liabilities assumed, and fair value of total consideration transferred	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Initial ​ Subsequent ​ ​ ​ ​ ​ As Recorded ​ Fair Value ​ Fair Value ​ As Recorded by ​ (Dollars in thousands) by Atlantic Capital Adjustments Adjustments ​ the Company Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 250,134 ​ $ 24 (a) $ — ​ $ 250,158 ​ Investment securities ​ ​ 717,332 ​ ​ (13,622) (b) ​ — ​ ​ 703,710 ​ Loans, net of allowance and mark ​ 2,394,256 ​ (18,964) (c) ​ (5,614) (c) 2,369,678 ​ Premises and equipment ​ 16,892 ​ 2,608 (d) ​ — ​ 19,500 ​ Intangible assets ​ ​ 22,572 ​ ​ (1,781) (e) ​ — ​ ​ 20,791 ​ Bank owned life insurance ​ ​ 74,613 ​ ​ — ​ ​ — ​ ​ 74,613 ​ Deferred tax asset ​ ​ 30,231 ​ ​ 2,273 (f) ​ (1,025) (f) ​ 31,479 ​ Other assets ​ 45,274 ​ (1,277) (g) ​ 7,557 (g) 51,554 ​ Total assets ​ $ 3,551,304 ​ $ (30,739) ​ $ 918 ​ $ 3,521,483 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Noninterest-bearing ​ $ 1,411,671 ​ $ — ​ $ — ​ $ 1,411,671 ​ Interest-bearing ​ 1,616,970 ​ — ​ ​ — ​ 1,616,970 ​ Total deposits ​ 3,028,641 ​ — ​ ​ — ​ 3,028,641 ​ Federal funds purchased and securities sold under agreements to repurchase ​ ​ 50,000 ​ ​ — ​ ​ — ​ ​ 50,000 ​ Other borrowings ​ ​ 74,131 ​ ​ 4,286 (h) ​ — ​ ​ 78,417 ​ Other liabilities ​ 50,711 ​ (2,075) (i) ​ — ​ 48,636 ​ Total liabilities ​ ​ 3,203,483 ​ ​ 2,211 ​ ​ — ​ ​ 3,205,694 ​ Net identifiable assets acquired over (under) liabilities assumed ​ ​ 347,821 ​ ​ (32,950) ​ ​ 918 ​ ​ 315,789 ​ Goodwill ​ — ​ 342,939 ​ ​ (918) ​ 342,021 ​ Net assets acquired over liabilities assumed ​ $ 347,821 ​ $ 309,989 ​ $ — ​ $ 657,810 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consideration: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ SouthState Corporation common shares issued ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7,330,803 ​ Purchase price per share of the Company's common stock ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 90.00 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Company common stock issued ($659,772) and cash exchanged for fractional shares ($19) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 659,791 ​ Stock option conversion ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 1,135 ​ Restricted stock unit conversion ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2,870 ​ Restricted stock awards conversion (unvested awards) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (5,986) ​ Fair value of total consideration transferred ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 657,810 ​ Explanation of fair value adjustments (a)— Represents an adjustment to record time deposits with financial institutions at fair value (premium). (b)— Represents the reversal of Atlantic Capital's existing fair value adjustments of $17.2 million and the adjustment to record securities at fair value (discount) totaling $30.9 million (includes reclassification of all securities held as HTM to AFS totaling $237.6 million). (c)— Represents approximately 1.40%, or $34.0 million, net credit discount of the loan portfolio and 2.24% total net discount, or $54.3 million, including non-credit discount, based on a third-party valuation. Also, includes a reversal of Atlantic Capital's ending ACL of (d)— Represents the preliminary fair value adjustments of $2.6 million on fixed assets and leased assets. (e)— Represents approximately $17.5 million, or 0.63%, of CDI amount and $3.2 million for SBA servicing asset based on a third-party valuation. Atlantic Capital’s pre-merger goodwill and servicing asset of $19.9 million and $2.6 million, respectively, were written-off. (f)— Represents deferred tax asset related to fair value adjustments with marginal tax rate of 23.9%, which includes an adjustment from Atlantic Capital’s effective tax rate to the Company’s effective tax rate. The difference in effective tax rates relates to state income taxes. (g)— Represents the fair value adjustment (decrease) for low-income housing investments of $1.1 million, write-off of prepaid assets of $233,000, adjustments to receivables of $154,000 and fair value adjustment for Small Business Investment Company (“SBIC”) investments of $7.4 million. (h)— Represents the reversal of the existing Atlantic Capital’s issuance costs on subordinated debt of $0.9 million and recording the fair value adjustment (premium) of $3.4 million, based on a third-party valuation. (i)— Represents the reversal of $2.8 million of unfunded commitment liability at purchase date and the fair value adjustment to increase lease liabilities associated with rental facilities totaling $1.4 million. Also includes the reversal of uncertain tax liability of $0.7 million.
Schedule of proforma information	​ ​ ​ ​ ​ ​ ​ ​ Pro Forma ​ ​ ​ Three Months Ended ​ (Dollars in thousands) ​ March 31, 2022 ​ Total revenues (net interest income plus noninterest income) $ 371,196 Net interest income ​ $ 281,577 ​ Net adjusted income available to the common shareholder ​ $ 113,903 ​ EPS — basic ​ $ 1.49 ​ EPS — diluted ​ $ 1.48 ​

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2023
Securities
Schedule of amortized cost and fair value of investment securities held to maturity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross Gross ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair (Dollars in thousands) Cost Gains Losses Value March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government agencies ​ $ 197,264 ​ $ — ​ $ (28,175) ​ $ 169,089 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,553,373 ​ ​ — ​ ​ (238,470) ​ ​ 1,314,903 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 468,794 ​ ​ — ​ ​ (63,317) ​ ​ 405,477 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 360,962 ​ ​ — ​ ​ (68,141) ​ ​ 292,821 ​ Small Business Administration loan-backed securities ​ ​ 56,280 ​ ​ — ​ ​ (10,958) ​ ​ 45,322 ​ ​ ​ $ 2,636,673 ​ $ — ​ $ (409,061) ​ $ 2,227,612 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government agencies ​ $ 197,262 ​ $ — ​ $ (29,787) ​ $ 167,475 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,591,646 ​ ​ — ​ ​ (255,093) ​ ​ 1,336,553 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 474,660 ​ ​ — ​ ​ (69,664) ​ ​ 404,996 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 362,586 ​ ​ — ​ ​ (66,304) ​ ​ 296,282 ​ Small Business Administration loan-backed securities ​ ​ 57,087 ​ ​ — ​ ​ (12,225) ​ ​ 44,862 ​ ​ ​ $ 2,683,241 ​ $ — ​ $ (433,073) ​ $ 2,250,168 ​
Schedule of amortized cost and fair value of investment securities available for sale	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Gross ​ Gross ​ ​ ​ ​ ​ ​ Amortized ​ Unrealized ​ Unrealized ​ Fair (Dollars in thousands) Cost Gains Losses Value March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ $ 273,035 ​ $ — ​ $ (4,939) ​ $ 268,096 ​ U.S. Government agencies ​ ​ 246,001 ​ ​ — ​ ​ (25,742) ​ ​ 220,259 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ 1,951,725 ​ — ​ (278,563) ​ 1,673,162 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 689,575 ​ ​ — ​ ​ (98,163) ​ ​ 591,412 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,180,323 ​ ​ 8 ​ ​ (192,894) ​ ​ 987,437 ​ State and municipal obligations ​ 1,138,809 ​ 4 ​ (171,856) ​ 966,957 ​ Small Business Administration loan-backed securities ​ 466,462 ​ 194 ​ (41,164) ​ 425,492 ​ Corporate securities ​ ​ 30,571 ​ ​ — ​ ​ (3,387) ​ ​ 27,184 ​ ​ ​ $ 5,976,501 ​ $ 206 ​ $ (816,708) ​ $ 5,159,999 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ $ 272,416 ​ $ — ​ $ (6,778) ​ $ 265,638 ​ U.S. Government agencies ​ ​ 245,972 ​ ​ — ​ ​ (26,884) ​ ​ 219,088 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,996,405 ​ — ​ (298,052) ​ 1,698,353 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 708,337 ​ ​ — ​ ​ (107,292) ​ ​ 601,045 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,196,700 ​ ​ 2,542 ​ ​ (198,844) ​ ​ 1,000,398 ​ State and municipal obligations ​ ​ 1,269,525 ​ 1,210 ​ (205,883) ​ 1,064,852 ​ Small Business Administration loan-backed securities ​ 491,203 ​ 302 ​ (46,695) ​ 444,810 ​ Corporate securities ​ 35,583 ​ ​ — ​ ​ (2,945) ​ ​ 32,638 ​ ​ ​ $ 6,216,141 ​ $ 4,054 ​ $ (893,373) ​ $ 5,326,822 ​
Schedule of amortized cost and carrying value of other investment securities	​ ​ ​ ​ ​ ​ ​ ​ Carrying (Dollars in thousands) Value March 31, 2023: ​ ​ ​ ​ Federal Home Loan Bank stock ​ $ 53,335 ​ Federal Reserve Bank stock ​ ​ 150,261 ​ Investment in unconsolidated subsidiaries ​ 3,563 ​ Other nonmarketable investment securities ​ 10,832 ​ ​ ​ $ 217,991 ​ December 31, 2022: ​ ​ ​ ​ Federal Home Loan Bank stock ​ $ 15,085 ​ Federal Reserve Bank stock ​ ​ 150,261 ​ Investment in unconsolidated subsidiaries ​ 3,563 ​ Other nonmarketable investment securities ​ 10,808 ​ ​ ​ $ 179,717 ​
Schedule of amortized cost and fair value of debt and equity securities by contractual maturity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities ​ Securities ​ ​ Held to Maturity ​ Available for Sale ​ ​ Amortized ​ Fair ​ Amortized ​ Fair (Dollars in thousands) Cost Value Cost Value Due in one year or less $ — ​ $ — $ 254,326 $ 250,191 ​ Due after one year through five years ​ 101,073 ​ 94,058 ​ 309,053 ​ 295,225 ​ Due after five years through ten years ​ 382,261 ​ 337,412 ​ 1,148,155 ​ 1,001,653 ​ Due after ten years ​ 2,153,339 ​ 1,796,142 ​ 4,264,967 ​ 3,612,930 ​ ​ ​ $ 2,636,673 ​ $ 2,227,612 ​ $ 5,976,501 ​ $ 5,159,999 ​
Schedule of securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Less Than ​ Twelve Months ​ ​ Twelve Months ​ or More ​ ​ Gross Unrealized ​ Fair ​ Gross Unrealized ​ Fair (Dollars in thousands) Losses Value Losses Value March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities Held to Maturity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government agencies ​ $ — ​ $ — ​ $ 28,175 ​ $ 169,089 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ — ​ ​ — ​ ​ 238,470 ​ ​ 1,314,903 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,187 ​ 45,925 ​ 62,130 ​ 359,552 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 13,414 ​ ​ 57,771 ​ ​ 54,727 ​ ​ 235,050 ​ Small Business Administration loan-backed securities ​ ​ — ​ ​ — ​ ​ 10,958 ​ ​ 45,322 ​ ​ ​ $ 14,601 ​ $ 103,696 ​ $ 394,460 ​ $ 2,123,916 ​ Securities Available for Sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ $ — ​ $ — ​ $ 4,939 ​ $ 268,096 ​ U.S. Government agencies ​ ​ 1,065 ​ ​ 53,935 ​ ​ 24,677 ​ ​ 166,324 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,027 ​ ​ 32,334 ​ ​ 277,536 ​ ​ 1,640,828 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 2,650 ​ 73,464 ​ 95,513 ​ 517,948 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ 10,606 ​ ​ 107,009 ​ ​ 182,288 ​ ​ 874,332 ​ State and municipal obligations ​ 4,250 ​ ​ 74,784 ​ ​ 167,606 ​ ​ 888,984 ​ Small Business Administration loan-backed securities ​ 428 ​ ​ 80,092 ​ ​ 40,736 ​ ​ 278,346 ​ Corporate securities ​ ​ 635 ​ ​ 5,863 ​ ​ 2,752 ​ ​ 21,321 ​ ​ ​ $ 20,661 ​ $ 427,481 ​ $ 796,047 ​ $ 4,656,179 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Securities Held to Maturity ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Government agencies ​ $ 5,514 ​ $ 78,833 ​ $ 24,273 ​ $ 88,642 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 65,181 ​ ​ 513,086 ​ ​ 189,912 ​ ​ 823,467 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 30,284 ​ 277,868 ​ 39,380 ​ 127,128 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 14,318 ​ ​ 82,895 ​ ​ 51,986 ​ ​ 213,387 ​ Small Business Administration loan-backed securities ​ ​ — ​ ​ — ​ ​ 12,225 ​ ​ 44,862 ​ ​ ​ $ 115,297 ​ $ 952,682 ​ $ 317,776 ​ $ 1,297,486 ​ Securities Available for Sale ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ $ 6,778 ​ $ 265,638 ​ $ — ​ $ — ​ U.S. Government agencies ​ ​ 8,193 ​ ​ 138,807 ​ ​ 18,691 ​ ​ 80,281 ​ Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 42,767 ​ ​ 459,773 ​ ​ 255,285 ​ ​ 1,238,580 ​ Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 21,450 ​ 274,082 ​ 85,842 ​ 326,963 ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 17,156 ​ ​ 206,228 ​ ​ 181,688 ​ ​ 767,002 ​ State and municipal obligations ​ ​ 97,084 ​ ​ 616,631 ​ ​ 108,799 ​ ​ 391,848 ​ Small Business Administration loan-backed securities ​ ​ 2,152 ​ ​ 92,535 ​ ​ 44,543 ​ ​ 264,933 ​ Corporate securities ​ 2,209 ​ ​ 28,374 ​ ​ 736 ​ ​ 4,264 ​ ​ ​ $ 197,789 ​ $ 2,082,068 ​ $ 695,584 ​ $ 3,073,871 ​
Schedule of trading securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ (Dollars in thousands) 2023 2022 ​ U.S. Government agencies ​ $ 3,925 ​ $ 11,190 ​ Residential mortgage pass-through securities issued or guaranteed by U.S. ​ ​ ​ ​ ​ ​ ​ government agencies or sponsored enterprises ​ ​ 3,439 ​ ​ — ​ Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,304 ​ ​ 4,589 ​ State and municipal obligations ​ ​ 7,122 ​ ​ 13,993 ​ Other debt securities ​ ​ 249 ​ ​ 1,491 ​ ​ ​ $ 16,039 ​ $ 31,263 ​
Summary of net (losses) gains on trading securities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ (Dollars in thousands) 2023 2022 ​ Net losses on sales transaction ​ $ (139) ​ $ (1,239) ​ Net mark to mark losses ​ ​ (6) ​ ​ (1,976) ​ Net losses on trading securities ​ $ (145) ​ $ (3,215) ​

Loans (Tables)

Loans (Tables)	3 Months Ended
	Mar. 31, 2023
Summary of Loans
Summary of loans	The following is a summary of total loans: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ (Dollars in thousands) 2023 2022 Loans: ​ ​ ​ ​ ​ Construction and land development (1) ​ $ 2,749,290 ​ $ 2,860,360 ​ Commercial non-owner occupied ​ 8,236,216 ​ 8,072,959 ​ Commercial owner occupied real estate ​ 5,522,514 ​ 5,460,193 ​ Consumer owner occupied (2) ​ 5,528,546 ​ 5,162,042 ​ Home equity loans ​ 1,332,285 ​ 1,313,168 ​ Commercial and industrial ​ 5,321,306 ​ 5,313,483 ​ Other income producing property ​ 721,291 ​ 696,242 ​ Consumer ​ 1,277,549 ​ 1,278,426 ​ Other loans ​ 7,145 ​ 20,989 ​ Total loans ​ 30,696,142 ​ 30,177,862 ​ Less allowance for credit losses ​ (370,645) ​ (356,444) ​ Loans, net ​ $ 30,325,497 ​ $ 29,821,418 ​ (1) Construction and land development includes loans for both commercial construction and development, as well as loans for 1-4 family construction and lot loans. (2) Consumer owner occupied real estate includes loans on both 1-4 family owner occupied property, as well as loans collateralized by 1-4 family owner occupied property with a business intent.
Schedule of purchased loans through acquisition	​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ March 1, 2022 ​ Book value of acquired loans at acquisition ​ $ 137,874 ​ Allowance for credit losses at acquisition ​ (13,758) ​ Non-credit discount at acquisition ​ (5,943) ​ Carrying value or book value of acquired loans at acquisition ​ $ 118,173 ​
Schedule of credit risk profile by risk grade of loans	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ ​ Amortized Cost Basis by Origination Year As of March 31, 2023 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Revolving ​ Total Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 65,979 ​ $ 898,029 ​ $ 602,843 ​ $ 109,487 ​ $ 34,046 ​ $ 33,860 ​ $ 75,139 ​ $ 1,819,383 Special mention ​ ​ — ​ ​ 2,022 ​ ​ 1,193 ​ ​ 264 ​ ​ 20,255 ​ ​ 7,671 ​ ​ — ​ ​ 31,405 Substandard ​ ​ 1,518 ​ ​ 139 ​ ​ 164 ​ ​ 9 ​ ​ 1,334 ​ ​ 1,590 ​ ​ — ​ ​ 4,754 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 6 ​ ​ — ​ ​ 6 Total Construction and land development ​ $ 67,497 ​ $ 900,190 ​ $ 604,200 ​ $ 109,760 ​ $ 55,635 ​ $ 43,127 ​ $ 75,139 ​ $ 1,855,548 Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 144,211 ​ $ 2,339,057 ​ $ 1,964,957 ​ $ 799,333 ​ $ 892,806 ​ $ 1,834,435 ​ $ 89,240 ​ $ 8,064,039 Special mention ​ ​ 95 ​ ​ 9,442 ​ ​ 708 ​ ​ 12,167 ​ ​ 5,423 ​ ​ 60,130 ​ ​ — ​ ​ 87,965 Substandard ​ ​ 2,875 ​ ​ 5,697 ​ ​ 38,180 ​ ​ 1,405 ​ ​ 10,164 ​ ​ 25,637 ​ ​ 253 ​ ​ 84,211 Doubtful ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 Total Commercial non-owner occupied ​ $ 147,181 ​ $ 2,354,196 ​ $ 2,003,846 ​ $ 812,905 ​ $ 908,393 ​ $ 1,920,202 ​ $ 89,493 ​ $ 8,236,216 Commercial non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ 51 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 51 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 165,248 ​ $ 1,052,756 ​ $ 1,154,709 ​ $ 712,735 ​ $ 702,606 ​ $ 1,437,016 ​ $ 70,057 ​ $ 5,295,127 Special mention ​ ​ 342 ​ ​ 3,576 ​ ​ 24,689 ​ ​ 3,285 ​ ​ 4,397 ​ ​ 37,842 ​ ​ 1,020 ​ ​ 75,151 Substandard ​ ​ 1,916 ​ ​ 14,645 ​ ​ 34,913 ​ ​ 19,882 ​ ​ 12,394 ​ ​ 68,401 ​ ​ 80 ​ ​ 152,231 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ 4 ​ ​ — ​ ​ 5 Total commercial owner occupied ​ $ 167,506 ​ $ 1,070,977 ​ $ 1,214,311 ​ $ 735,903 ​ $ 719,397 ​ $ 1,543,263 ​ $ 71,157 ​ $ 5,522,514 Commercial owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 417,089 ​ $ 1,349,157 ​ $ 807,583 ​ $ 478,312 ​ $ 253,680 ​ $ 514,686 ​ $ 1,354,618 ​ $ 5,175,125 Special mention ​ ​ 533 ​ ​ 6,705 ​ ​ 4,488 ​ ​ 702 ​ ​ 1,698 ​ ​ 4,791 ​ ​ 23,114 ​ ​ 42,031 Substandard ​ ​ 2,464 ​ ​ 4,025 ​ ​ 27,306 ​ ​ 5,574 ​ ​ 6,359 ​ ​ 13,109 ​ ​ 45,274 ​ ​ 104,111 Doubtful ​ ​ 1 ​ ​ 2 ​ ​ 17 ​ ​ 1 ​ ​ — ​ ​ 16 ​ ​ 2 ​ ​ 39 Total commercial and industrial ​ $ 420,087 ​ $ 1,359,889 ​ $ 839,394 ​ $ 484,589 ​ $ 261,737 ​ $ 532,602 ​ $ 1,423,008 ​ $ 5,321,306 Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 2 ​ $ 1,097 ​ $ 160 ​ $ 14 ​ $ 149 ​ $ 280 ​ $ 104 ​ $ 1,806 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 14,839 ​ $ 161,959 ​ $ 107,741 ​ $ 58,591 ​ $ 45,660 ​ $ 142,437 ​ $ 49,887 ​ $ 581,114 Special mention ​ ​ 80 ​ ​ 603 ​ ​ 859 ​ ​ 1,007 ​ ​ 337 ​ ​ 3,387 ​ ​ 2,076 ​ ​ 8,349 Substandard ​ ​ — ​ ​ 842 ​ ​ 900 ​ ​ 294 ​ ​ 236 ​ ​ 7,081 ​ ​ 614 ​ ​ 9,967 Doubtful ​ ​ — ​ ​ 397 ​ ​ — ​ ​ — ​ ​ — ​ ​ 6 ​ ​ — ​ ​ 403 Total other income producing property ​ $ 14,919 ​ $ 163,801 ​ $ 109,500 ​ $ 59,892 ​ $ 46,233 ​ $ 152,911 ​ $ 52,577 ​ $ 599,833 Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,349 ​ $ 4,740 ​ $ 3,117 ​ $ 1,720 ​ $ 382 ​ $ 467 ​ $ 17,524 ​ $ 29,299 Special mention ​ ​ — ​ ​ 528 ​ ​ 19 ​ ​ 132 ​ ​ 281 ​ ​ — ​ ​ — ​ ​ 960 Substandard ​ ​ — ​ ​ 7 ​ ​ 94 ​ ​ 931 ​ ​ 1,601 ​ ​ 193 ​ ​ 151 ​ ​ 2,977 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ 1 Total Consumer owner occupied ​ $ 1,349 ​ $ 5,275 ​ $ 3,230 ​ $ 2,783 ​ $ 2,264 ​ $ 661 ​ $ 17,675 ​ $ 33,237 Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 7,145 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 7,145 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total other loans ​ $ 7,145 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 7,145 Other loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Commercial Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 815,860 ​ $ 5,805,698 ​ $ 4,640,950 ​ $ 2,160,178 ​ $ 1,929,180 ​ $ 3,962,901 ​ $ 1,656,465 ​ $ 20,971,232 Special mention ​ ​ 1,050 ​ ​ 22,876 ​ ​ 31,956 ​ ​ 17,557 ​ ​ 32,391 ​ ​ 113,821 ​ ​ 26,210 ​ ​ 245,861 Substandard ​ ​ 8,773 ​ ​ 25,355 ​ ​ 101,557 ​ ​ 28,095 ​ ​ 32,088 ​ ​ 116,011 ​ ​ 46,372 ​ ​ 358,251 Doubtful ​ ​ 1 ​ ​ 399 ​ ​ 18 ​ ​ 2 ​ ​ — ​ ​ 33 ​ ​ 2 ​ ​ 455 Total Commercial Loans ​ $ 825,684 ​ $ 5,854,328 ​ $ 4,774,481 ​ $ 2,205,832 ​ $ 1,993,659 ​ $ 4,192,766 ​ $ 1,729,049 ​ $ 21,575,799 Total Commercial Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 2 ​ $ 1,097 ​ $ 211 ​ $ 14 ​ $ 149 ​ $ 280 ​ $ 104 ​ $ 1,857 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ ​ Amortized Cost Basis by Origination Year As of December 31, 2022 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ 2018 ​ Prior ​ Revolving ​ Total Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 875,751 ​ $ 742,985 ​ $ 134,996 ​ $ 63,439 ​ $ 14,521 ​ $ 29,442 ​ $ 65,656 ​ $ 1,926,790 Special mention ​ ​ 1,643 ​ ​ 988 ​ ​ 268 ​ ​ 76 ​ ​ 7,219 ​ ​ 2,068 ​ ​ — ​ ​ 12,262 Substandard ​ ​ 214 ​ ​ 10,409 ​ ​ 11 ​ ​ 2,326 ​ ​ — ​ ​ 4,282 ​ ​ — ​ ​ 17,242 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 6 ​ ​ — ​ ​ 6 Total Construction and land development ​ $ 877,608 ​ $ 754,382 ​ $ 135,275 ​ $ 65,841 ​ $ 21,740 ​ $ 35,798 ​ $ 65,656 ​ $ 1,956,300 Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 2,245,943 ​ $ 1,849,079 ​ $ 816,791 ​ $ 959,707 ​ $ 506,350 ​ $ 1,417,397 ​ $ 108,759 ​ $ 7,904,026 Special mention ​ ​ 7,579 ​ ​ 4,225 ​ ​ 936 ​ ​ 11,036 ​ ​ 24,067 ​ ​ 32,110 ​ ​ 5,000 ​ ​ 84,953 Substandard ​ ​ 13,256 ​ ​ 25,557 ​ ​ 609 ​ ​ 9,383 ​ ​ 6,472 ​ ​ 26,366 ​ ​ 2,257 ​ ​ 83,900 Doubtful ​ ​ — ​ ​ 1 ​ ​ — ​ ​ 79 ​ ​ — ​ ​ — ​ ​ — ​ ​ 80 Total Commercial non-owner occupied ​ $ 2,266,778 ​ $ 1,878,862 ​ $ 818,336 ​ $ 980,205 ​ $ 536,889 ​ $ 1,475,873 ​ $ 116,016 ​ $ 8,072,959 Commercial non-owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 8 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 360 ​ $ — ​ $ 368 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial Owner Occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,046,562 ​ $ 1,136,289 ​ $ 725,040 ​ $ 709,669 ​ $ 446,497 ​ $ 1,080,522 ​ $ 75,506 ​ $ 5,220,085 Special mention ​ ​ 3,620 ​ ​ 25,263 ​ ​ 3,383 ​ ​ 7,934 ​ ​ 7,160 ​ ​ 34,724 ​ ​ 1,294 ​ ​ 83,378 Substandard ​ ​ 12,861 ​ ​ 34,210 ​ ​ 19,962 ​ ​ 16,502 ​ ​ 9,487 ​ ​ 62,808 ​ ​ 895 ​ ​ 156,725 Doubtful ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ 4 ​ ​ — ​ ​ 5 Total commercial owner occupied ​ $ 1,063,043 ​ $ 1,195,762 ​ $ 748,386 ​ $ 734,105 ​ $ 463,144 ​ $ 1,178,058 ​ $ 77,695 ​ $ 5,460,193 Commercial owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,143 ​ ​ — ​ ​ 833 ​ ​ — ​ ​ 1,976 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 1,566,203 ​ $ 895,368 ​ $ 506,655 ​ $ 274,446 ​ $ 212,522 ​ $ 333,286 ​ $ 1,386,678 ​ $ 5,175,158 Special mention ​ ​ 5,885 ​ ​ 3,782 ​ ​ 3,401 ​ ​ 1,859 ​ ​ 3,378 ​ ​ 1,316 ​ ​ 24,347 ​ ​ 43,968 Substandard ​ ​ 6,308 ​ ​ 27,974 ​ ​ 4,770 ​ ​ 6,591 ​ ​ 6,783 ​ ​ 8,476 ​ ​ 32,876 ​ ​ 93,778 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 155 ​ ​ 422 ​ ​ 2 ​ ​ 579 Total commercial and industrial ​ $ 1,578,396 ​ $ 927,124 ​ $ 514,826 ​ $ 282,896 ​ $ 222,838 ​ $ 343,500 ​ $ 1,443,903 ​ $ 5,313,483 Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ ​ 4 ​ ​ 2,825 ​ ​ 198 ​ ​ 630 ​ ​ 2,214 ​ ​ 2,589 ​ ​ 1,742 ​ ​ 10,202 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 149,793 ​ $ 92,887 ​ $ 60,473 ​ $ 46,189 ​ $ 47,155 ​ $ 107,436 ​ $ 46,179 ​ $ 550,112 Special mention ​ ​ 952 ​ ​ 957 ​ ​ 1,257 ​ ​ 378 ​ ​ 190 ​ ​ 3,652 ​ ​ 2,328 ​ ​ 9,714 Substandard ​ ​ 876 ​ ​ 359 ​ ​ 1,281 ​ ​ 300 ​ ​ 214 ​ ​ 11,214 ​ ​ 1,065 ​ ​ 15,309 Doubtful ​ ​ 401 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 136 ​ ​ — ​ ​ 537 Total other income producing property ​ $ 152,022 ​ $ 94,203 ​ $ 63,011 ​ $ 46,867 ​ $ 47,559 ​ $ 122,438 ​ $ 49,572 ​ $ 575,672 Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 46 ​ $ 50 ​ $ 96 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 5,947 ​ $ 3,124 ​ $ 1,811 ​ $ 418 ​ $ 68 ​ $ 332 ​ $ 15,910 ​ $ 27,610 Special mention ​ ​ 537 ​ ​ 20 ​ ​ 136 ​ ​ 284 ​ ​ — ​ ​ — ​ ​ 66 ​ ​ 1,043 Substandard ​ ​ 13 ​ ​ 95 ​ ​ 12 ​ ​ 1,614 ​ ​ — ​ ​ 202 ​ ​ 151 ​ ​ 2,087 Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ 1 Total Consumer owner occupied ​ $ 6,497 ​ $ 3,239 ​ $ 1,959 ​ $ 2,316 ​ $ 69 ​ $ 534 ​ $ 16,127 ​ $ 30,741 Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 20,989 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 20,989 Special mention ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Substandard ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Doubtful ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — Total other loans ​ $ 20,989 ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 20,989 Other loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Commercial Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Risk rating: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pass ​ $ 5,911,188 ​ $ 4,719,732 ​ $ 2,245,766 ​ $ 2,053,868 ​ $ 1,227,113 ​ $ 2,968,415 ​ $ 1,698,688 ​ $ 20,824,770 Special mention ​ ​ 20,216 ​ ​ 35,235 ​ ​ 9,381 ​ ​ 21,567 ​ ​ 42,014 ​ ​ 73,870 ​ ​ 33,035 ​ ​ 235,318 Substandard ​ ​ 33,528 ​ ​ 98,604 ​ ​ 26,645 ​ ​ 36,716 ​ ​ 22,956 ​ ​ 113,348 ​ ​ 37,244 ​ ​ 369,041 Doubtful ​ ​ 401 ​ ​ 1 ​ ​ 1 ​ ​ 79 ​ ​ 156 ​ ​ 568 ​ ​ 2 ​ ​ 1,208 Total Commercial Loans ​ $ 5,965,333 ​ $ 4,853,572 ​ $ 2,281,793 ​ $ 2,112,230 ​ $ 1,292,239 ​ $ 3,156,201 ​ $ 1,768,969 ​ $ 21,430,337 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 12 ​ $ 2,825 ​ $ 198 ​ $ 1,773 ​ $ 2,214 ​ $ 3,828 ​ $ 1,792 ​ $ 12,642 ​ For the consumer segment, delinquency of a loan is determined by past due status. Consumer loans are automatically placed on nonaccrual status once the loan is 90 days past due. Construction and land development loans are on 1-4 properties and lots. The following table presents the credit risk profile by past due status of consumer loans by origination year as of March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ Amortized Cost Basis by Origination Year As of March 31, 2023 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Revolving ​ Total Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 240,632 ​ $ 1,748,552 ​ $ 1,587,281 ​ $ 657,794 ​ $ 309,618 ​ $ 939,645 ​ $ — ​ $ 5,483,522 30 days past due ​ ​ — ​ ​ 438 ​ ​ 451 ​ ​ 323 ​ ​ 672 ​ ​ 2,242 ​ ​ — ​ ​ 4,126 60 days past due ​ ​ — ​ ​ 243 ​ ​ 97 ​ ​ 620 ​ ​ — ​ ​ 746 ​ ​ — ​ ​ 1,706 90 days past due ​ ​ — ​ ​ 676 ​ ​ 268 ​ ​ 853 ​ ​ 683 ​ ​ 3,475 ​ ​ — ​ ​ 5,955 Total Consumer owner occupied ​ $ 240,632 ​ $ 1,749,909 ​ $ 1,588,097 ​ $ 659,590 ​ $ 310,973 ​ $ 946,108 ​ $ — ​ $ 5,495,309 Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ 2 ​ $ — ​ $ 2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 4,563 ​ $ 7,084 ​ $ 5,367 ​ $ 3,733 ​ $ 1,141 ​ $ 17,773 ​ $ 1,287,131 ​ $ 1,326,792 30 days past due ​ ​ — ​ ​ 273 ​ ​ — ​ ​ — ​ ​ 89 ​ ​ 1,003 ​ ​ 2,424 ​ ​ 3,789 60 days past due ​ ​ — ​ ​ 59 ​ ​ — ​ ​ — ​ ​ — ​ ​ 221 ​ ​ 494 ​ ​ 774 90 days past due ​ ​ — ​ ​ — ​ ​ 162 ​ ​ 21 ​ ​ 277 ​ ​ 121 ​ ​ 349 ​ ​ 930 Total Home equity loans ​ $ 4,563 ​ $ 7,416 ​ $ 5,529 ​ $ 3,754 ​ $ 1,507 ​ $ 19,118 ​ $ 1,290,398 ​ $ 1,332,285 Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ 39 ​ $ — ​ $ — ​ $ — ​ $ 39 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 104,807 ​ $ 383,665 ​ $ 187,023 ​ $ 100,664 ​ $ 78,646 ​ $ 173,622 ​ $ 224,373 ​ $ 1,252,800 30 days past due ​ ​ — ​ ​ 252 ​ ​ 449 ​ ​ 37 ​ ​ 107 ​ ​ 1,213 ​ ​ 11,052 ​ ​ 13,110 60 days past due ​ ​ — ​ ​ 231 ​ ​ 19 ​ ​ 49 ​ ​ 55 ​ ​ 242 ​ ​ 7,531 ​ ​ 8,127 90 days past due ​ ​ — ​ ​ 456 ​ ​ 76 ​ ​ 39 ​ ​ 34 ​ ​ 1,400 ​ ​ 1,507 ​ ​ 3,512 Total consumer ​ $ 104,807 ​ $ 384,604 ​ $ 187,567 ​ $ 100,789 ​ $ 78,842 ​ $ 176,477 ​ $ 244,463 ​ $ 1,277,549 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 20 ​ $ 295 ​ $ 100 ​ $ 79 ​ $ 100 ​ $ 244 ​ $ 1,891 ​ $ 2,729 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 20,979 ​ $ 554,627 ​ $ 251,650 ​ $ 35,810 ​ $ 11,006 ​ $ 18,336 ​ $ 615 ​ $ 893,023 30 days past due ​ ​ — ​ ​ 325 ​ ​ — ​ ​ — ​ ​ — ​ ​ 279 ​ ​ — ​ ​ 604 60 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ 22 ​ ​ — ​ ​ 92 ​ ​ — ​ ​ 114 90 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1 Total Construction and land development ​ $ 20,979 ​ $ 554,952 ​ $ 251,650 ​ $ 35,833 ​ $ 11,006 ​ $ 18,707 ​ $ 615 ​ $ 893,742 Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 3,664 ​ $ 45,269 ​ $ 20,833 ​ $ 4,812 ​ $ 2,624 ​ $ 43,104 ​ $ 604 ​ $ 120,910 30 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 292 ​ ​ — ​ ​ 292 60 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 256 ​ ​ — ​ ​ 256 Total other income producing property ​ $ 3,664 ​ $ 45,269 ​ $ 20,833 ​ $ 4,812 ​ $ 2,624 ​ $ 43,652 ​ $ 604 ​ $ 121,458 Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Consumer Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 374,645 ​ $ 2,739,197 ​ $ 2,052,154 ​ $ 802,813 ​ $ 403,035 ​ $ 1,192,480 ​ $ 1,512,723 ​ $ 9,077,047 30 days past due ​ ​ — ​ ​ 1,288 ​ ​ 900 ​ ​ 360 ​ ​ 868 ​ ​ 5,029 ​ ​ 13,476 ​ ​ 21,921 60 days past due ​ ​ — ​ ​ 533 ​ ​ 116 ​ ​ 691 ​ ​ 55 ​ ​ 1,301 ​ ​ 8,025 ​ ​ 10,721 90 days past due ​ ​ — ​ ​ 1,132 ​ ​ 506 ​ ​ 914 ​ ​ 994 ​ ​ 5,252 ​ ​ 1,856 ​ ​ 10,654 Total Consumer Loans ​ $ 374,645 ​ $ 2,742,150 ​ $ 2,053,676 ​ $ 804,778 ​ $ 404,952 ​ $ 1,204,062 ​ $ 1,536,080 ​ $ 9,120,343 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 20 ​ $ 295 ​ $ 100 ​ $ 118 ​ $ 100 ​ $ 246 ​ $ 1,891 ​ $ 2,770 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ Amortized Cost Basis by Origination Year As of March 31, 2023 ​ 2023 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ Prior ​ Revolving ​ Total Total Loans ​ $ 1,200,329 ​ $ 8,596,478 ​ $ 6,828,157 ​ $ 3,010,610 ​ $ 2,398,611 ​ $ 5,396,828 ​ $ 3,265,129 ​ $ 30,696,142 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 890 ​ $ 524 ​ $ 311 ​ $ 132 ​ $ 249 ​ $ 526 ​ $ 1,995 ​ $ 4,627 The following table presents the credit risk profile by past due status of consumer loans by origination year as of December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ Amortized Cost Basis by Origination Year As of December 31, 2022 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ 2018 ​ Prior ​ Revolving ​ Total Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 1,695,454 ​ $ 1,467,080 ​ $ 657,005 ​ $ 315,458 ​ $ 187,580 ​ $ 792,572 ​ $ — ​ $ 5,115,149 30 days past due ​ ​ 1,316 ​ ​ 1,254 ​ ​ 1,681 ​ ​ 664 ​ ​ 272 ​ ​ 2,028 ​ ​ — ​ ​ 7,215 60 days past due ​ ​ 255 ​ ​ 337 ​ ​ 579 ​ ​ — ​ ​ 242 ​ ​ 1,650 ​ ​ — ​ ​ 3,063 90 days past due ​ ​ — ​ ​ 944 ​ ​ 776 ​ ​ 454 ​ ​ 664 ​ ​ 3,036 ​ ​ — ​ ​ 5,874 Total Consumer owner occupied ​ $ 1,697,025 ​ $ 1,469,615 ​ $ 660,041 ​ $ 316,576 ​ $ 188,758 ​ $ 799,286 ​ $ — ​ $ 5,131,301 Consumer owner occupied ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 25 ​ $ — ​ $ — ​ $ 6 ​ $ 23 ​ $ 66 ​ $ — ​ $ 120 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 5,921 ​ $ 5,231 ​ $ 3,282 ​ $ 1,560 ​ $ 1,955 ​ $ 17,941 ​ $ 1,272,848 ​ $ 1,308,738 30 days past due ​ ​ — ​ ​ — ​ ​ 155 ​ ​ 77 ​ ​ 418 ​ ​ 422 ​ ​ 1,586 ​ ​ 2,658 60 days past due ​ ​ — ​ ​ — ​ ​ 19 ​ ​ 36 ​ ​ 70 ​ ​ 26 ​ ​ 540 ​ ​ 691 90 days past due ​ ​ — ​ ​ — ​ ​ 60 ​ ​ 87 ​ ​ — ​ ​ 611 ​ ​ 323 ​ ​ 1,081 Total Home equity loans ​ $ 5,921 ​ $ 5,231 ​ $ 3,516 ​ $ 1,760 ​ $ 2,443 ​ $ 19,000 ​ $ 1,275,297 ​ $ 1,313,168 Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ 19 ​ $ — ​ $ 280 ​ $ 146 ​ $ 445 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 407,825 ​ $ 206,003 ​ $ 111,210 ​ $ 86,008 ​ $ 44,303 ​ $ 141,053 ​ $ 248,314 ​ $ 1,244,716 30 days past due ​ ​ 718 ​ ​ 194 ​ ​ 78 ​ ​ 174 ​ ​ 63 ​ ​ 1,255 ​ ​ 17,471 ​ ​ 19,953 60 days past due ​ ​ 55 ​ ​ 103 ​ ​ 107 ​ ​ 36 ​ ​ 144 ​ ​ 557 ​ ​ 9,836 ​ ​ 10,838 90 days past due ​ ​ 126 ​ ​ 60 ​ ​ 58 ​ ​ 66 ​ ​ 165 ​ ​ 1,660 ​ ​ 784 ​ ​ 2,919 Total consumer ​ $ 408,724 ​ $ 206,360 ​ $ 111,453 ​ $ 86,284 ​ $ 44,675 ​ $ 144,525 ​ $ 276,405 ​ $ 1,278,426 Consumer ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 254 ​ $ 653 ​ $ 337 ​ $ 265 ​ $ 62 ​ $ 664 ​ $ 7,979 ​ $ 10,214 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 466,475 ​ $ 351,485 ​ $ 50,472 ​ $ 14,053 ​ $ 7,006 ​ $ 13,588 ​ $ 379 ​ $ 903,458 30 days past due ​ ​ 2 ​ ​ — ​ ​ — ​ ​ 57 ​ ​ 23 ​ ​ 43 ​ ​ — ​ ​ 125 60 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — 90 days past due ​ ​ — ​ ​ — ​ ​ 436 ​ ​ — ​ ​ — ​ ​ 41 ​ ​ — ​ ​ 477 Total Construction and land development ​ $ 466,477 ​ $ 351,485 ​ $ 50,908 ​ $ 14,110 ​ $ 7,029 ​ $ 13,672 ​ $ 379 ​ $ 904,060 Construction and land development ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ 21 ​ $ — ​ $ — ​ $ 4 ​ $ — ​ $ 25 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 45,717 ​ $ 21,421 ​ $ 4,937 ​ $ 2,663 ​ $ 4,322 ​ $ 40,680 ​ $ 624 ​ $ 120,364 30 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 62 ​ ​ — ​ ​ 62 60 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 23 ​ ​ — ​ ​ 23 90 days past due ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 121 ​ ​ — ​ ​ 121 Total other income producing property ​ $ 45,717 ​ $ 21,421 ​ $ 4,937 ​ $ 2,663 ​ $ 4,322 ​ $ 40,886 ​ $ 624 ​ $ 120,570 Other income producing property ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Consumer Loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Days past due: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current ​ $ 2,621,392 ​ $ 2,051,220 ​ $ 826,906 ​ $ 419,742 ​ $ 245,166 ​ $ 1,005,834 ​ $ 1,522,165 ​ $ 8,692,425 30 days past due ​ ​ 2,036 ​ ​ 1,448 ​ ​ 1,914 ​ ​ 972 ​ ​ 776 ​ ​ 3,810 ​ ​ 19,057 ​ ​ 30,013 60 days past due ​ ​ 310 ​ ​ 440 ​ ​ 705 ​ ​ 72 ​ ​ 456 ​ ​ 2,256 ​ ​ 10,376 ​ ​ 14,615 90 days past due ​ ​ 126 ​ ​ 1,004 ​ ​ 1,330 ​ ​ 607 ​ ​ 829 ​ ​ 5,469 ​ ​ 1,107 ​ ​ 10,472 Total Consumer Loans ​ $ 2,623,864 ​ $ 2,054,112 ​ $ 830,855 ​ $ 421,393 ​ $ 247,227 ​ $ 1,017,369 ​ $ 1,552,705 ​ $ 8,747,525 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 279 ​ $ 653 ​ $ 358 ​ $ 290 ​ $ 85 ​ $ 1,014 ​ $ 8,125 ​ $ 10,804 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Term Loans (Dollars in thousands) ​ Amortized Cost Basis by Origination Year As of December 31, 2022 ​ 2022 ​ 2021 ​ 2020 ​ 2019 ​ 2018 ​ Prior ​ Revolving ​ Total Total Loans ​ $ 8,589,197 ​ $ 6,907,684 ​ $ 3,112,648 ​ $ 2,533,623 ​ $ 1,539,466 ​ $ 4,173,570 ​ $ 3,321,674 ​ $ 30,177,862 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Current-period gross charge-offs ​ $ 291 ​ $ 3,478 ​ $ 556 ​ $ 2,063 ​ $ 2,299 ​ $ 4,842 ​ $ 9,917 ​ $ 23,446 ​
Aging analysis of past due loans (includes nonaccrual loans), segregated by class of loans	The following table presents an aging analysis of past due accruing loans, segregated by class. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 30 - 59 Days 60 - 89 Days 90+ Days Total ​ Non- ​ Total (Dollars in thousands) ​ Past Due ​ Past Due ​ Past Due ​ Past Due ​ Current ​ Accruing ​ Loans March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ $ 980 ​ $ 4,050 ​ $ — ​ $ 5,030 ​ $ 2,743,954 ​ $ 306 ​ $ 2,749,290 Commercial non-owner occupied ​ 4,410 ​ 1,778 ​ — ​ 6,188 ​ 8,208,270 ​ 21,758 ​ 8,236,216 Commercial owner occupied ​ 3,841 ​ ​ 4,552 ​ 1,665 ​ 10,058 ​ 5,476,893 ​ 35,563 ​ 5,522,514 Consumer owner occupied ​ 2,521 ​ 1,344 ​ — ​ 3,865 ​ 5,505,300 ​ 19,381 ​ 5,528,546 Home equity loans ​ 2,811 ​ 673 ​ — ​ 3,484 ​ 1,323,065 ​ 5,736 ​ 1,332,285 Commercial and industrial ​ 21,931 ​ 9,618 ​ 1,837 ​ 33,386 ​ 5,257,967 ​ 29,953 ​ 5,321,306 Other income producing property ​ 2,224 ​ 156 ​ 147 ​ 2,527 ​ 715,773 ​ 2,991 ​ 721,291 Consumer ​ 13,015 ​ 8,002 ​ 1 ​ 21,018 ​ 1,251,249 ​ 5,282 ​ 1,277,549 Other loans ​ — ​ — ​ — ​ — ​ 7,145 ​ — ​ 7,145 ​ ​ $ 51,733 ​ $ 30,173 ​ $ 3,650 ​ $ 85,556 ​ $ 30,489,616 ​ $ 120,970 ​ $ 30,696,142 December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ $ 2,146 ​ $ 3,653 ​ $ — ​ $ 5,799 ​ $ 2,853,734 ​ $ 827 ​ $ 2,860,360 Commercial non-owner occupied ​ 1,158 ​ 978 ​ 77 ​ 2,213 ​ 8,050,321 ​ 20,425 ​ 8,072,959 Commercial owner occupied ​ 10,748 ​ ​ 2,059 ​ 2,231 ​ 15,038 ​ 5,410,066 ​ 35,089 ​ 5,460,193 Consumer owner occupied ​ ​ 6,001 ​ 744 ​ 40 ​ 6,785 ​ 5,137,950 ​ 17,307 ​ 5,162,042 Home equity loans ​ 2,527 ​ 361 ​ — ​ 2,888 ​ 1,303,964 ​ 6,316 ​ 1,313,168 Commercial and industrial ​ 24,500 ​ 11,677 ​ 1,704 ​ 37,881 ​ 5,258,473 ​ 17,129 ​ 5,313,483 Other income producing property ​ 1,623 ​ 1,480 ​ 298 ​ 3,401 ​ 690,107 ​ 2,734 ​ 696,242 Consumer ​ 19,713 ​ 10,655 ​ — ​ 30,368 ​ 1,243,660 ​ 4,398 ​ 1,278,426 Other loans ​ — ​ — ​ — ​ — ​ 20,989 ​ — ​ 20,989 ​ ​ $ 68,416 ​ $ 31,607 ​ $ 4,350 ​ $ 104,373 ​ $ 29,969,264 ​ $ 104,225 ​ $ 30,177,862
Summary of information pertaining to nonaccrual loans by class	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ Greater than ​ Non-accrual ​ December 31, ​ ​ (Dollars in thousands) ​ 2023 ​ 90 Days Accruing (1) with no allowance (1) 2022 Construction and land development ​ $ 306 ​ $ — ​ $ 8 ​ $ 827 ​ ​ Commercial non-owner occupied ​ 21,758 ​ ​ — ​ 11,338 ​ 20,425 ​ ​ Commercial owner occupied real estate ​ 35,563 ​ ​ 1,665 ​ 15,034 ​ 35,089 ​ ​ Consumer owner occupied ​ 19,381 ​ ​ — ​ 5 ​ 17,307 ​ ​ Home equity loans ​ 5,736 ​ ​ — ​ 1,489 ​ 6,316 ​ ​ Commercial and industrial ​ 29,953 ​ ​ 1,837 ​ 6,252 ​ 17,129 ​ ​ Other income producing property ​ 2,991 ​ ​ 147 ​ — ​ 2,734 ​ ​ Consumer ​ 5,282 ​ ​ 1 ​ — ​ 4,398 ​ ​ Total loans on nonaccrual status ​ $ 120,970 ​ $ 3,650 ​ $ 34,126 ​ $ 104,225 ​ ​ (1) – Greater than 90 days accruing and non-accrual with no allowance loans at March 31, 2023.
Summary of collateral dependent loans, by type of collateral	The following is a summary of collateral dependent loans, by type of collateral, and the extent to which they are collateralized during the period: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ Collateral ​ ​ December 31, ​ Collateral ​ ​ (Dollars in thousands) ​ 2023 Coverage % ​ 2022 Coverage % ​ Commercial owner occupied real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Industrial ​ $ 8,166 ​ $ 9,344 114% ​ $ — ​ $ — ​ ​ Other ​ ​ 6,868 ​ ​ 17,012 248% ​ ​ 14,638 ​ ​ 38,900 266% ​ Commercial non-owner occupied real estate ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ 11,338 ​ ​ 31,860 281% ​ ​ 6,450 ​ ​ 10,900 169% ​ Commercial and industrial ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Other ​ ​ 18,428 ​ ​ 30,586 166% ​ ​ 4,808 ​ ​ 5,591 116% ​ Home equity loans ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential 1-4 family dwelling ​ ​ 1,489 ​ ​ 2,860 192% ​ ​ 1,523 ​ ​ 1,671 110% ​ Total collateral dependent loans ​ $ 46,289 ​ $ 91,662 ​ ​ $ 27,419 ​ $ 57,062 ​ ​
Schedule of restructured loans segregated by class and type of concession	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended and As of March 31, ​ ​ ​ 2023 ​ ​ ​ ​ ​ ​ ​ Increase in ​ ​ ​ Amortized ​ % of Total ​ Weighted Average ​ (Dollars in thousands) ​ Cost ​ Asset Class ​ Life of Loan ​ Term extension ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ $ 260 ​ $ 0.04% ​ 12 months ​ Commercial owner occupied real estate ​ ​ 2,105 ​ ​ 0.02% ​ 8 months ​ Commercial and industrial ​ ​ 1,145 ​ ​ 0.02% ​ 10 months ​ Consumer ​ ​ 282 ​ ​ 0.02% ​ 6 months ​ Total term extensions ​ $ 3,792 ​ ​ ​ ​ ​ ​
Schedule of changes in status of loans restructured within the previous 12 months	The following table presents the changes in status of loans modified within the previous three months to borrowers experiencing financial difficulty, as of March 31, 2023, by type of modification. There were no subsequent defaults. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Paying Under ​ Converted to ​ Foreclosures ​ ​ ​ Restructured Terms ​ Nonaccrual ​ and Defaults ​ ​ ​ Amortized ​ Amortized ​ Amortized ​ (Dollars in thousands) ​ Cost ​ Cost ​ Cost ​ Term extension ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ $ 260 ​ $ — ​ $ — ​ Commercial owner occupied real estate ​ ​ 2,105 ​ ​ — ​ ​ — ​ Consumer owner occupied ​ ​ 282 ​ ​ — ​ ​ — ​ Commercial and industrial ​ ​ 1,145 ​ ​ — ​ ​ — ​ Total term extensions ​ $ 3,792 ​ $ — ​ $ — ​ The following table presents the changes in status of TDR loans within the previous twelve months as of March 31, 2022 by type of concession, for the comparative period, prior to the adoption of ASU 2022-02. There were no subsequent defaults that resulted in a change to reserves on the individually evaluated loan. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Paying Under ​ Converted to ​ Foreclosures and ​ ​ Restructured Terms ​ Nonaccrual ​ Defaults ​ ​ Number ​ Recorded ​ Number ​ Recorded ​ Number ​ Recorded (Dollars in thousands) ​ of Loans ​ Investment ​ of Loans ​ Investment ​ of Loans ​ Investment Interest rate modification 14 $ 1,783 — $ — — $ — ​ Term modification 4 ​ 2,806 — ​ — — ​ — ​ ​ 18 ​ $ 4,589 — ​ $ — — ​ $ — ​
Non acquired credit impaired loans
Summary of Loans
Aging analysis of past due loans (includes nonaccrual loans), segregated by class of loans	The following table depicts the performance of loans modified within the previous three months to borrowers experiencing financial difficulty, as of March 31, 2023. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Payment Status (Amortized Cost Basis) ​ ​ ​ ​ ​ 30-89 Days ​ 90+ Days ​ (Dollars in thousands) ​ Current ​ Past Due ​ Past Due ​ Construction and land development ​ $ 260 ​ $ — ​ $ — ​ Commercial owner occupied ​ ​ 2,105 ​ ​ — ​ ​ — ​ Consumer owner occupied ​ ​ 282 ​ ​ — ​ ​ — ​ Commercial and industrial ​ ​ 1,145 ​ ​ — ​ ​ — ​ Total ​ $ 3,792 ​ $ — ​ $ — ​
Schedule of restructured loans segregated by class and type of concession	The following table presents loans designated as TDRs segregated by class and type of concession that were restructured, for the comparative period, prior to the adoption of ASU 2022-02. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ ​ 2022 ​ ​ ​ ​ ​ Pre-Modification ​ Post-Modification ​ ​ ​ Number ​ Amortized ​ Amortized ​ (Dollars in thousands) ​ of loans ​ Cost ​ Cost ​ Interest rate modification ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ 1 ​ $ 120 ​ $ 120 ​ Commercial non-owner occupied ​ 1 ​ ​ 187 ​ ​ 187 ​ Commercial owner occupied ​ 2 ​ ​ 268 ​ ​ 268 ​ Consumer owner occupied ​ 1 ​ ​ 99 ​ ​ 99 ​ Commercial and industrial ​ 4 ​ ​ 497 ​ ​ 497 ​ Other income producing property ​ 2 ​ ​ 119 ​ ​ 119 ​ Total interest rate modifications ​ 11 ​ $ 1,290 ​ $ 1,290 ​ Term modification ​ ​ ​ ​ ​ ​ ​ ​ ​ Construction and land development ​ 1 ​ $ 141 ​ $ 141 ​ Commercial non-owner occupied ​ 2 ​ ​ 2,356 ​ ​ 2,356 ​ Total term modifications ​ 3 ​ ​ 2,497 ​ ​ 2,497 ​ ​ ​ 14 ​ $ 3,787 ​ $ 3,787 ​

Allowance for Credit Losses (_2

Allowance for Credit Losses (ACL) (Tables)	3 Months Ended
	Mar. 31, 2023
Allowance for Credit Losses (ACL)
Schedule of changes in allowance for loan losses	The following table presents a disaggregated analysis of activity in the allowance for credit losses as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Residential ​ Residential ​ ​ ​ Residential ​ Other ​ ​ ​ ​ ​ ​ ​ CRE Owner ​ Non-Owner ​ ​ ​ ​ ​ (Dollars in thousands) ​ Mortgage Sr. ​ Mortgage Jr. ​ HELOC ​ Construction ​ C&D ​ Consumer ​ Multifamily ​ Municipal ​ Occupied ​ Occupied CRE ​ C & I ​ Total Three Months Ended March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at end of period December 31, 2022 ​ $ 72,188 ​ $ 405 ​ $ 14,886 ​ $ 8,974 ​ $ 45,410 ​ $ 22,767 ​ $ 3,684 ​ $ 849 ​ $ 58,083 ​ $ 78,485 ​ $ 50,713 ​ $ 356,444 Charge-offs ​ (2) ​ — ​ (39) ​ — ​ — ​ (2,729) ​ — ​ — ​ — ​ ​ (51) ​ ​ (1,806) ​ (4,627) Recoveries ​ 294 ​ 5 ​ 245 ​ 72 ​ 258 ​ 584 ​ — ​ — ​ 293 ​ ​ 106 ​ ​ 1,732 ​ 3,589 Net (charge offs) recoveries ​ ​ 292 ​ 5 ​ 206 ​ 72 ​ 258 ​ (2,145) ​ — ​ — ​ 293 ​ ​ 55 ​ ​ (74) ​ ​ (1,038) Provision (recovery) (1) ​ 4,871 ​ (61) ​ (774) ​ 130 ​ 9,401 ​ 2,697 ​ 1,823 ​ 30 ​ (835) ​ ​ 3,933 ​ ​ (5,976) ​ 15,239 Balance at end of period March 31, 2023 ​ $ 77,351 ​ $ 349 ​ $ 14,318 ​ $ 9,176 ​ $ 55,069 ​ $ 23,319 ​ $ 5,507 ​ $ 879 ​ $ 57,541 ​ $ 82,473 ​ $ 44,663 ​ $ 370,645 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative allowance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collectively evaluated ​ $ 77,982 ​ $ 350 ​ $ 12,229 ​ $ 8,994 ​ $ 49,865 ​ $ 23,319 ​ $ 5,369 ​ $ 731 ​ $ 49,297 ​ $ 78,013 ​ $ 35,355 ​ $ 341,504 Individually evaluated ​ ​ 197 ​ ​ — ​ ​ 2,285 ​ ​ — ​ ​ 155 ​ ​ — ​ ​ — ​ ​ — ​ ​ 6,812 ​ ​ 2,721 ​ ​ 4,612 ​ ​ 16,782 Total quantitative allowance ​ ​ 78,179 ​ ​ 350 ​ ​ 14,514 ​ ​ 8,994 ​ ​ 50,020 ​ ​ 23,319 ​ ​ 5,369 ​ ​ 731 ​ ​ 56,109 ​ ​ 80,734 ​ ​ 39,967 ​ ​ 358,286 Qualitative allowance ​ ​ (828) ​ ​ (1) ​ ​ (196) ​ ​ 182 ​ ​ 5,049 ​ ​ — ​ ​ 138 ​ ​ 148 ​ ​ 1,432 ​ ​ 1,739 ​ ​ 4,696 ​ ​ 12,359 Balance at end of period March 31, 2023 ​ $ 77,351 ​ $ 349 ​ $ 14,318 ​ $ 9,176 ​ $ 55,069 ​ $ 23,319 ​ $ 5,507 ​ $ 879 ​ $ 57,541 ​ $ 82,473 ​ $ 44,663 ​ $ 370,645 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at end of period December 31, 2021 ​ $ 47,036 ​ $ 611 ​ $ 13,325 ​ $ 4,997 ​ $ 37,593 ​ $ 23,149 ​ $ 4,921 ​ $ 565 ​ $ 61,794 ​ $ 79,649 ​ $ 28,167 ​ $ 301,807 Initial Allowance for PCD loans acquired during period ​ ​ 84 ​ ​ — ​ ​ — ​ ​ — ​ ​ 86 ​ ​ — ​ ​ — ​ ​ — ​ ​ 1,479 ​ ​ — ​ ​ 7,569 ​ ​ 9,218 Initial Allowance for Non PCD loans acquired during period ​ ​ 352 ​ ​ 26 ​ ​ 132 ​ ​ 2 ​ ​ 1,887 ​ ​ 51 ​ ​ 426 ​ ​ — ​ ​ 2,519 ​ ​ 2,697 ​ ​ 5,605 ​ ​ 13,697 Charge-offs ​ (58) ​ (19) ​ (218) ​ — ​ (4) ​ (2,661) ​ — ​ — ​ (371) ​ ​ — ​ ​ (2,159) ​ (5,490) Recoveries ​ 394 ​ 55 ​ 257 ​ 3 ​ 234 ​ 532 ​ — ​ — ​ 314 ​ ​ 69 ​ ​ 1,309 ​ 3,167 Net (charge offs) recoveries ​ ​ 336 ​ ​ 36 ​ ​ 39 ​ ​ 3 ​ ​ 230 ​ ​ (2,129) ​ ​ — ​ ​ — ​ ​ (57) ​ ​ 69 ​ ​ (850) ​ ​ (2,323) Provision (recovery) (1) ​ (1,806) ​ (87) ​ 175 ​ 614 ​ (14,438) ​ 828 ​ (1,444) ​ 42 ​ (16,641) ​ ​ 13,945 ​ ​ (3,191) ​ (22,003) Balance at end of period March 31, 2022 ​ $ 46,002 ​ $ 586 ​ $ 13,671 ​ $ 5,616 ​ $ 25,358 ​ $ 21,899 ​ $ 3,903 ​ $ 607 ​ $ 49,094 ​ $ 96,360 ​ $ 37,300 ​ $ 300,396 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Allowance for credit losses: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quantitative allowance ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Collectively evaluated ​ $ 45,805 ​ $ 586 ​ $ 12,301 ​ $ 5,616 ​ $ 24,770 ​ $ 21,899 ​ $ 3,903 ​ $ 607 ​ $ 45,302 ​ $ 95,051 ​ $ 32,476 ​ $ 288,316 Individually evaluated ​ ​ 168 ​ ​ — ​ ​ 1,357 ​ ​ — ​ ​ 588 ​ ​ — ​ ​ — ​ ​ — ​ ​ 2,960 ​ ​ — ​ ​ 3,358 ​ ​ 8,431 Total quantitative allowance ​ ​ 45,973 ​ ​ 586 ​ ​ 13,658 ​ ​ 5,616 ​ ​ 25,358 ​ ​ 21,899 ​ ​ 3,903 ​ ​ 607 ​ ​ 48,262 ​ ​ 95,051 ​ ​ 35,834 ​ ​ 296,747 Qualitative allowance ​ ​ 29 ​ ​ — ​ ​ 13 ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ — ​ ​ 832 ​ ​ 1,309 ​ ​ 1,466 ​ ​ 3,649 Balance at end of period March 31, 2022 ​ $ 46,002 ​ $ 586 ​ $ 13,671 ​ $ 5,616 ​ $ 25,358 ​ $ 21,899 ​ $ 3,903 ​ $ 607 ​ $ 49,094 ​ $ 96,360 ​ $ 37,300 ​ $ 300,396 (1) Provision for credit losses for unfunded commitments of $17.9 million was recorded during the first quarter of 2023, compared to a negative provision (recovery) for credit losses of ($142,000) , net of the provision for $3.4 million recorded for the unfunded commitments acquired from ACBI, recorded during the first quarter of 2022 that is not included in the above table.

Other Real Estate Owned and B_2

Other Real Estate Owned and Bank Properties Held for Sale (Tables)	3 Months Ended
	Mar. 31, 2023
Other Real Estate Owned and Bank Properties Held for Sale
Schedule of information pertaining to OREO and Bank Premises Held for Sale	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ OREO ​ Bank Properties Held for Sale ​ Total Balance, December 31, 2022 $ 1,023 ​ $ 17,754 ​ $ 18,777 Additions, net ​ ​ 2,826 ​ ​ — ​ ​ 2,826 Write-downs ​ ​ — ​ ​ (409) ​ ​ (409) Sold ​ ​ (376) ​ ​ (621) ​ ​ (997) Balance, March 31, 2023 ​ $ 3,473 ​ $ 16,724 ​ $ 20,197

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2023
Leases
Schedule of information pertaining to operating leases	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ (Dollars in thousands) ​ March 31, ​ ​ 2023 2022 Lease Cost Components: ​ ​ ​ ​ ​ ​ ​ ​ Amortization of ROU assets - finance leases ​ $ 117 ​ $ 117 ​ ​ Interest on lease liabilities - finance leases ​ ​ 11 ​ ​ 13 ​ ​ Operating lease cost (cost resulting from lease payments) ​ ​ 4,240 ​ ​ 4,333 ​ ​ Short-term lease cost ​ ​ 109 ​ ​ 143 ​ ​ Variable lease cost (cost excluded from lease payments) ​ 634 ​ 437 ​ ​ Total lease cost ​ $ 5,111 ​ $ 5,043 ​ ​ Supplemental Cash Flow and Other Information Related to Leases: ​ ​ ​ ​ ​ ​ ​ ​ Finance lease - operating cash flows ​ $ 11 ​ $ 13 ​ ​ Finance lease - financing cash flows ​ ​ 110 ​ ​ 108 ​ ​ Operating lease - operating cash flows (fixed payments) ​ ​ 4,097 ​ ​ 4,181 ​ ​ Operating lease - operating cash flows (net change asset/liability) ​ ​ (3,287) ​ ​ (3,303) ​ ​ New ROU assets - operating leases ​ ​ — ​ ​ 12,428 ​ ​ New ROU assets - finance leases ​ ​ — ​ ​ — ​ ​ Weighted - average remaining lease term (years) - finance leases ​ ​ 5.18 ​ ​ 6.17 ​ ​ Weighted - average remaining lease term (years) - operating leases ​ 9.88 ​ ​ 10.47 ​ ​ Weighted - average discount rate - finance leases ​ ​ 1.7% ​ ​ 1.7% ​ ​ Weighted - average discount rate - operating leases ​ 3.0% ​ 3.0% ​ ​ ​ ​ ​ ​ ​ ​ ​ Operating lease payments due: ​ ​ ​ ​ ​ ​ ​ ​ 2023 (excluding the quarter ended March 31, 2023) ​ $ 12,226 ​ ​ ​ ​ ​ 2024 ​ ​ 15,011 ​ ​ ​ ​ ​ 2025 ​ ​ 13,548 ​ ​ ​ ​ ​ 2026 ​ ​ 13,135 ​ ​ ​ ​ ​ 2027 ​ ​ 12,172 ​ ​ ​ ​ ​ Thereafter ​ ​ 66,550 ​ ​ ​ ​ ​ Total undiscounted cash flows ​ ​ 132,642 ​ ​ ​ ​ ​ Discount on cash flows ​ ​ (20,233) ​ ​ ​ ​ ​ Total operating lease liabilities ​ $ 112,409 ​ ​ ​ ​ ​

Deposits (Tables)

Deposits (Tables)	3 Months Ended
	Mar. 31, 2023
Deposits
Schedule of total deposits	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ (Dollars in thousands) 2023 2022 Noninterest-bearing checking ​ $ 12,422,583 ​ $ 13,168,656 ​ Interest-bearing checking ​ 8,316,023 ​ 8,955,519 ​ Savings ​ 3,156,214 ​ 3,464,351 ​ Money market ​ 8,388,275 ​ 8,342,111 ​ Time deposits ​ ​ 4,118,497 ​ ​ 2,419,986 ​ Total deposits ​ $ 36,401,592 ​ $ 36,350,623 ​ ​

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2023
Earnings Per Common Share
Schedule of computation of basic and diluted earnings per common share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ ​ March 31, ​ (Dollars and shares in thousands, except for per share amounts) 2023 2022 Basic earnings per common share: ​ ​ ​ ​ ​ Net income ​ $ 139,926 ​ $ 100,329 ​ Weighted-average basic common shares ​ ​ 75,902 ​ ​ 71,447 ​ Basic earnings per common share ​ $ 1.84 ​ $ 1.40 ​ Diluted earnings per common share: ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 139,926 ​ $ 100,329 ​ Weighted-average basic common shares ​ ​ 75,902 ​ ​ 71,447 ​ Effect of dilutive securities ​ ​ 487 ​ ​ 664 ​ Weighted-average dilutive shares ​ ​ 76,389 ​ ​ 72,111 ​ Diluted earnings per common share ​ $ 1.83 ​ $ 1.39 ​
Schedule of anti-dilutive securities excluded from computation of diluted earnings per common share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, ​ ​ ​ 2023 2022 ​ Number of shares ​ ​ ​ ​ ​ 57,169 ​ ​ ​ ​ ​ 57,169 ​ Range of exercise prices ​ $ 87.30 to $ 91.35 ​ $ 87.30 to $ 91.35 ​ ​

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2023
Share-Based Compensation
Schedule of stock option activity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ ​ ​ ​ ​ ​ ​ Weighted ​ Average ​ Aggregate ​ ​ ​ ​ ​ Average ​ Remaining ​ Intrinsic ​ ​ Shares Price (Yrs.) (000's) Outstanding at January 1, 2023 ​ 161,832 ​ $ 66.20 ​ ​ ​ ​ ​ ​ Exercised ​ (19,011) ​ 51.01 ​ ​ ​ ​ ​ Expired ​ (929) ​ ​ 33.09 ​ ​ ​ ​ ​ Outstanding at March 31, 2023 ​ 141,892 ​ 68.45 ​ 3.03 ​ $ 1,534 ​ Exercisable at March 31, 2023 ​ 141,892 ​ ​ 68.45 ​ 3.03 ​ $ 1,534 ​
Summary of nonvested restricted stock	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted- ​ ​ ​ ​ Average ​ ​ ​ ​ Grant-Date Restricted Stock ​ Shares ​ Fair Value Nonvested at January 1, 2023 50,506 ​ $ 89.12 ​ Vested (18,380) ​ 90.00 ​ Forfeited (2,233) ​ 90.00 ​ Nonvested at March 31, 2023 29,893 ​ $ 88.51 ​
Summary of nonvested RSUs	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted- ​ ​ ​ ​ Average ​ ​ ​ ​ Grant-Date Restricted Stock Units ​ Shares ​ Fair Value Outstanding at January 1, 2023 940,512 ​ $ 73.82 ​ Granted 328,343 ​ 76.05 ​ Vested ​ (177,708) ​ ​ 86.81 ​ Forfeited ​ (3,604) ​ ​ 75.92 ​ Outstanding at March 31, 2023 1,087,543 ​ $ 72.37 ​

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2023
Schedule of recorded amount of assets and liabilities measured at fair value on a recurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices ​ ​ ​ ​ ​ ​ ​ ​ ​ In Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs (Dollars in thousands) ​ Fair Value ​ (Level 1) ​ (Level 2) ​ (Level 3) March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivative financial instruments ​ $ 159,287 ​ $ — ​ $ 159,287 ​ $ — Loans held for sale ​ 27,289 ​ — ​ 27,289 ​ — Trading securities ​ 16,039 ​ — ​ 16,039 ​ — Securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ ​ 268,096 ​ ​ — ​ ​ 268,096 ​ ​ — U.S. Government agencies ​ ​ 220,259 ​ ​ — ​ ​ 220,259 ​ ​ — Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,673,162 ​ ​ — ​ ​ 1,673,162 ​ ​ — Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 591,412 ​ ​ — ​ ​ 591,412 ​ ​ — Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 987,437 ​ ​ — ​ ​ 987,437 ​ ​ — State and municipal obligations ​ 966,957 ​ — ​ 966,957 ​ — Small Business Administration loan-backed securities ​ 425,492 ​ — ​ 425,492 ​ — Corporate securities ​ ​ 27,184 ​ ​ — ​ ​ 27,184 ​ ​ — Total securities available for sale ​ 5,159,999 ​ — ​ 5,159,999 ​ — Mortgage servicing rights ​ 85,406 ​ — ​ — ​ 85,406 SBA servicing asset ​ ​ 6,521 ​ ​ — ​ ​ — ​ ​ 6,521 ​ ​ $ 5,454,541 ​ $ — ​ $ 5,362,614 ​ $ 91,927 Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivative financial instruments ​ $ 806,584 ​ $ — ​ $ 806,584 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivative financial instruments ​ $ 211,016 ​ $ — ​ $ 211,016 ​ $ — Loans held for sale ​ 28,968 ​ — ​ 28,968 ​ — Trading securities ​ 31,263 ​ — ​ 31,263 ​ — Securities available for sale: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ U.S. Treasuries ​ ​ 265,638 ​ ​ — ​ ​ 265,638 ​ ​ — U.S. Government agencies ​ ​ 219,088 ​ ​ — ​ ​ 219,088 ​ ​ — Residential mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,698,353 ​ ​ — ​ ​ 1,698,353 ​ ​ — Residential collateralized mortgage-obligations issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 601,045 ​ ​ — ​ ​ 601,045 ​ ​ — Commercial mortgage-backed securities issued by U.S. government ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ agencies or sponsored enterprises ​ ​ 1,000,398 ​ ​ — ​ ​ 1,000,398 ​ ​ — State and municipal obligations ​ 1,064,852 ​ — ​ 1,064,852 ​ — Small Business Administration loan-backed securities ​ 444,810 ​ — ​ 444,810 ​ — Corporate securities ​ 32,638 ​ — ​ 32,638 ​ — Total securities available for sale ​ 5,326,822 ​ — ​ 5,326,822 ​ — Mortgage servicing rights ​ 86,610 ​ — ​ — ​ 86,610 SBA servicing asset ​ ​ 6,068 ​ ​ — ​ ​ — ​ ​ 6,068 ​ ​ $ 5,690,747 ​ $ — ​ $ 5,598,069 ​ $ 92,678 Liabilities ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Derivative financial instruments ​ $ 1,034,143 ​ $ — ​ $ 1,034,143 ​ $ —
Schedule of reconciliation of the beginning and ending balances of Level 3 assets, comprised of Mortgage Servicing Rights, SBA servicing asset and liabilities recorded at fair value on a recurring basis	​ ​ ​ ​ ​ ​ (Dollars in thousands) MSRs Fair value, January 1, 2023 ​ $ 86,610 ​ Servicing assets that resulted from transfers of financial assets ​ 1,494 ​ Changes in fair value due to valuation inputs or assumptions ​ (1,289) ​ Changes in fair value due to decay ​ (1,409) ​ Fair value, March 31, 2023 ​ $ 85,406 ​
Schedule of amounts of assets and liabilities measured at fair value on a nonrecurring basis	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Quoted Prices ​ ​ ​ ​ ​ ​ ​ ​ ​ In Active ​ Significant ​ ​ ​ ​ ​ ​ ​ ​ Markets ​ Other ​ Significant ​ ​ ​ ​ ​ for Identical ​ Observable ​ Unobservable ​ ​ ​ ​ ​ Assets ​ Inputs ​ Inputs (Dollars in thousands) ​ Fair Value ​ (Level 1) ​ (Level 2) ​ (Level 3) March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OREO ​ $ 3,473 ​ $ — ​ $ — ​ $ 3,473 ​ Bank properties held for sale ​ ​ 16,724 ​ ​ — ​ — ​ ​ 16,724 ​ Individually evaluated loans ​ 28,650 ​ — ​ — ​ 28,650 ​ December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ OREO ​ $ 1,023 ​ $ — ​ $ — ​ $ 1,023 ​ Bank properties held for sale ​ ​ 17,754 ​ ​ — ​ — ​ ​ 17,754 ​ Individually evaluated loans ​ 20,802 ​ — ​ — ​ 20,802 ​ ​
Schedule of quantitative information about level 3 fair value measurements	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ Valuation Technique Unobservable Input 2023 2022 Nonrecurring measurements: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Individually evaluated loans Discounted appraisals and discounted cash flows Collateral discounts ​ 24 % ​ 31 % OREO and Bank properties held for sale Discounted appraisals Collateral discounts and estimated costs to sell ​ 15 % ​ 16 % ​
Schedule of estimated fair value, and related carrying amount, of the Company's financial instruments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Carrying Fair ​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ Amount ​ Value ​ Level 1 ​ Level 2 ​ Level 3 March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 1,996,662 ​ $ 1,996,662 ​ $ 1,996,662 ​ $ — ​ $ — ​ Trading securities ​ ​ 16,039 ​ ​ 16,039 ​ ​ — ​ ​ 16,039 ​ ​ — ​ Investment securities ​ 8,014,663 ​ 7,567,328 ​ 179,717 ​ 7,387,611 ​ — ​ Loans held for sale ​ ​ 27,289 ​ ​ 27,289 ​ ​ — ​ ​ 27,289 ​ ​ — ​ Loans, net of allowance for credit losses ​ 30,325,497 ​ 29,646,800 ​ — ​ — ​ 29,646,800 ​ Accrued interest receivable ​ 138,515 ​ 138,515 ​ — ​ 26,888 ​ 111,627 ​ Mortgage servicing rights ​ 85,406 ​ 85,406 ​ — ​ — ​ 85,406 ​ SBA servicing asset ​ ​ 6,521 ​ ​ — ​ ​ — ​ ​ — ​ ​ 6,521 ​ Interest rate swap - non-designated hedge ​ 157,014 ​ 157,014 ​ — ​ 157,014 ​ — ​ Other derivative financial instruments (mortgage banking related) ​ 2,273 ​ 2,273 ​ — ​ 2,273 ​ — ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 36,401,592 ​ 36,333,275 ​ — ​ 36,333,275 ​ — ​ Federal funds purchased and securities sold under agreements to repurchase ​ 544,108 ​ 556,417 ​ — ​ 556,417 ​ — ​ Corporate and subordinated debentures ​ ​ 392,182 ​ ​ 380,925 ​ ​ — ​ 380,925 ​ — ​ Other borrowings ​ 900,000 ​ 900,000 ​ — ​ 900,000 ​ — ​ Accrued interest payable ​ 20,411 ​ 20,411 ​ — ​ 20,411 ​ — ​ Interest rate swap - non-designated hedge ​ 806,584 ​ 806,584 ​ — ​ 806,584 ​ — ​ Other derivative financial instruments (mortgage banking related) ​ — ​ — ​ — ​ — ​ — ​ Off balance sheet financial instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commitments to extend credit ​ — ​ (255,022) ​ — ​ (255,022) ​ — ​ December 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Financial assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 1,312,563 ​ $ 1,312,563 ​ $ 1,312,563 ​ $ — ​ $ — ​ Trading securities ​ ​ 31,263 ​ ​ 31,263 ​ ​ — ​ ​ 31,263 ​ ​ — ​ Investment securities ​ 8,189,780 ​ 7,756,707 ​ 179,717 ​ 7,576,990 ​ — ​ Loans held for sale ​ ​ 28,968 ​ ​ 28,968 ​ ​ — ​ ​ 28,968 ​ ​ — ​ Loans, net of allowance for credit losses ​ 29,821,418 ​ 29,329,499 ​ — ​ — ​ 29,329,499 ​ Accrued interest receivable ​ 134,594 ​ 134,594 ​ — ​ 28,449 ​ 106,145 ​ Mortgage servicing rights ​ 86,610 ​ 86,610 ​ — ​ — ​ 86,610 ​ SBA servicing asset ​ ​ 6,068 ​ ​ — ​ ​ — ​ ​ — ​ ​ 6,068 ​ Interest rate swap - non-designated hedge ​ 210,216 ​ 210,216 ​ — ​ 210,216 ​ — ​ Other derivative financial instruments (mortgage banking related) ​ 800 ​ 800 ​ — ​ 800 ​ — ​ Financial liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Deposits ​ 36,350,623 ​ 36,264,401 ​ — ​ 36,264,401 ​ — ​ Federal funds purchased and securities sold under agreements to repurchase ​ 556,417 ​ 556,417 ​ — ​ 556,417 ​ — ​ Corporate and subordinated debentures ​ 392,275 ​ 377,360 ​ — ​ 377,360 ​ — ​ Accrued interest payable ​ 6,218 ​ 6,218 ​ — ​ 3,345 ​ — ​ Interest rate swap - non-designated hedge ​ 1,033,980 ​ 1,033,980 ​ — ​ 1,033,980 ​ — ​ Other derivative financial instruments (mortgage banking related) ​ ​ 163 ​ ​ 163 ​ — ​ 163 ​ — ​ Off balance sheet financial instruments: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Commitments to extend credit ​ ​ — ​ (184,801) ​ — ​ (184,801) ​ — ​
SBA servicing asset
Schedule of amounts of assets and liabilities measured at fair value on a nonrecurring basis	​ ​ ​ ​ ​ ​ (Dollars in thousands) SBA Servicing Asset Fair value, January 1, 2023 ​ $ 6,068 ​ Servicing assets that resulted from transfers of financial assets ​ ​ 334 ​ Changes in fair value due to decay ​ ​ (236) ​ Changes in fair value due to valuation inputs or assumptions ​ ​ 355 ​ Fair value, March 31, 2023 ​ $ 6,521 ​

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss)
Schedule of components of accumulated other comprehensive (loss) income	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Unrealized Gains and ​ ​ ​ ​ ​ Benefit ​ (Losses) on Securities ​ ​ ​ (Dollars in thousands) ​ Plans ​ Available for Sale ​ Total Three Months Ended March 31, 2023 ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at December 31, 2022 ​ $ (673) ​ $ (676,415) ​ $ (677,088) Other comprehensive income before reclassifications ​ — ​ 63,271 ​ 63,271 Amounts reclassified from accumulated other comprehensive loss ​ — ​ 33 ​ 33 Net comprehensive income ​ — ​ 63,304 ​ 63,304 Balance at March 31, 2023 ​ $ (673) ​ $ (613,111) ​ $ (613,784) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 31, 2022 ​ ​ ​ ​ ​ ​ ​ ​ ​ Balance at December 31, 2021 ​ $ 57 ​ $ (21,203) ​ $ (21,146) Other comprehensive loss before reclassifications ​ — ​ (272,810) ​ ​ (272,810) Net comprehensive loss ​ — ​ (272,810) ​ (272,810) Balance at March 31, 2022 ​ $ 57 ​ $ (294,013) ​ $ (293,956)
Schedule of reclassifications out of accumulated other comprehensive (loss) income, net of tax	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Amount Reclassified from Accumulated Other Comprehensive Income (Loss) ​ ​ (Dollars in thousands) ​ For the Three Months Ended March 31, ​ ​ Accumulated Other Comprehensive Income (Loss) Component 2023 2022 Income Statement Line Item Affected Gains on sales of available for sale securities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ $ 45 ​ $ — ​ Securities gains, net ​ ​ ​ (12) ​ ​ — ​ Provision for income taxes ​ ​ ​ 33 ​ ​ — ​ Net income Total reclassifications for the period ​ $ 33 ​ $ — ​ ​

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2023
Derivative Financial Instruments
Derivative financial instruments summary	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, 2023 ​ ​ ​ ​ December 31, 2022 ​ ​ Balance Sheet ​ Notional ​ Estimated Fair Value ​ Notional ​ Estimated Fair Value (Dollars in thousands) Location Amount Gain Loss Amount Gain Loss ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Fair value hedge of interest rate risk: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Pay fixed rate swap with counterparty ​ Other Assets and Other Liabilities ​ $ 12,186 ​ $ 206 ​ $ — ​ $ 12,289 ​ $ 414 ​ $ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Not designated hedges of interest rate risk: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Customer related interest rate contracts: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Matched interest rate swaps with borrowers ​ Other Assets and Other Liabilities ​ ​ 10,701,004 ​ ​ 28,580 ​ ​ 805,749 ​ ​ 10,480,171 ​ ​ 8,539 ​ ​ 1,033,980 Matched interest rate swaps with counterparty ​ Other Assets and Other Liabilities ​ ​ 10,606,749 ​ ​ 128,227 ​ ​ 835 ​ ​ 10,400,733 ​ ​ 201,263 ​ ​ — ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Not designated hedges of interest rate risk - mortgage banking activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Contracts used to hedge mortgage servicing rights ​ Other Assets and Other Liabilities ​ ​ 67,500 ​ ​ 1,158 ​ ​ — ​ ​ 35,000 ​ ​ — ​ ​ 163 Contracts used to hedge mortgage pipeline ​ Other Assets ​ ​ 100,500 ​ ​ 1,115 ​ ​ — ​ ​ 51,000 ​ ​ 800 ​ ​ — Total derivatives ​ ​ ​ $ 21,487,939 ​ $ 159,286 ​ $ 806,584 ​ $ 20,979,193 ​ $ 211,016 ​ $ 1,034,143 ​
Schedule of notional value of forward sale commitments and the fair value of those obligations along with the fair value of the mortgage pipeline	​ ​ ​ ​ ​ ​ ​ ​ ​ (Dollars in thousands) March 31, 2023 December 31, 2022 Mortgage loan pipeline ​ $ 107,831 ​ $ 40,850 ​ Expected closures ​ 90,737 ​ 37,210 ​ Fair value of mortgage loan pipeline commitments ​ 1,848 ​ 524 ​ Forward sales commitments ​ 100,500 ​ 51,000 ​ Fair value of forward commitments ​ (734) ​ 276 ​

Capital Ratios (Tables)

Capital Ratios (Tables)	3 Months Ended
	Mar. 31, 2023
Capital Ratios
Schedule of actual and required capital ratios	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Required to be ​ ​ ​ ​ ​ ​ ​ Minimum Capital Considered Well ​ ​ Actual ​ Required - Basel III ​ Capitalized ​ (Dollars in thousands) Amount Ratio Capital Amount Ratio Capital Amount Ratio March 31, 2023: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common equity Tier 1 to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 3,891,155 11.13 % $ 2,446,483 ​ 7.00 % $ 2,271,735 6.50 % SouthState Bank (the Bank) ​ 4,165,577 11.93 % 2,443,212 ​ 7.00 % 2,268,697 6.50 % Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 3,891,155 11.13 % 2,970,730 ​ 8.50 % 2,795,981 8.00 % SouthState Bank (the Bank) ​ 4,165,577 11.93 % 2,966,757 ​ 8.50 % 2,792,242 8.00 % Total capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 4,647,783 13.30 % 3,669,725 ​ 10.50 % 3,494,976 10.00 % SouthState Bank (the Bank) ​ 4,532,206 12.99 % 3,664,818 ​ 10.50 % 3,490,303 10.00 % Tier 1 capital to average assets (leverage ratio): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 3,891,155 9.05 % 1,719,404 ​ 4.00 % 2,149,255 5.00 % SouthState Bank (the Bank) ​ 4,165,577 9.70 % 1,718,633 ​ 4.00 % 2,148,291 5.00 % December 31, 2022: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Common equity Tier 1 to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ $ 3,788,106 10.96 % $ 2,420,417 ​ 7.00 % $ 2,247,530 6.50 % SouthState Bank (the Bank) ​ 4,074,045 11.80 % 2,417,133 ​ 7.00 % 2,244,481 6.50 % Tier 1 capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 3,788,106 10.96 % 2,939,077 ​ 8.50 % 2,766,190 8.00 % SouthState Bank (the Bank) ​ 4,074,045 11.80 % 2,935,090 ​ 8.50 % 2,762,438 8.00 % Total capital to risk-weighted assets: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 4,485,397 12.97 % 3,630,625 ​ 10.50 % 3,457,738 10.00 % SouthState Bank (the Bank) ​ 4,381,336 12.69 % 3,625,700 ​ 10.50 % 3,453,047 10.00 % Tier 1 capital to average assets (leverage ratio): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Consolidated ​ 3,788,106 8.72 % 1,736,991 ​ 4.00 % 2,171,239 5.00 % SouthState Bank (the Bank) ​ 4,074,045 9.39 % 1,736,330 ​ 4.00 % 2,170,412 5.00 %

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2023
Goodwill and Other Intangible Assets
Summary of gross carrying amounts and accumulated amortization of other intangible assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ December 31, ​ (Dollars in thousands) 2023 2022 Gross carrying amount ​ $ 275,321 ​ $ 274,869 ​ Accumulated amortization ​ (165,718) ​ (158,419) ​ ​ ​ $ 109,603 ​ $ 116,450 ​
Schedule of estimated amortization expense for other intangibles for each of the next five quarters	​ ​ ​ ​ ​ ​ (Dollars in thousands) ​ ​ ​ ​ Quarter ending: ​ June 30, 2023 ​ $ 7,028 ​ September 30, 2023 ​ 6,616 ​ December 31, 2023 ​ 6,615 ​ March 31, 2024 ​ 6,003 ​ June 30, 2024 ​ ​ 5,739 ​ Thereafter ​ 71,082 ​ ​ ​ $ 103,083 ​

Mortgage Loan Servicing, Orig_2

Mortgage Loan Servicing, Origination, and Loans Held for Sale (Tables)	3 Months Ended
	Mar. 31, 2023
Mortgage Loan Servicing, Origination, and Loans Held for Sale
Summary of changes in the fair value of MSRs and its offsetting hedge	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ (Dollars in thousands) March 31, 2023 March 31, 2022 (Decrease) increase in fair value of MSRs ​ $ (1,290) ​ $ 12,827 ​ Decay of MSRs ​ (1,409) ​ (2,230) ​ Gain (loss) related to derivatives ​ ​ 145 ​ ​ (11,838) ​ Net effect on Condensed Consolidated Statements of Net Income ​ $ (2,554) ​ $ (1,241) ​
Schedule of characteristics and sensitivity analysis of the MSR	The characteristics and sensitivity analysis of the MSRs are included in the following table. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 31, ​ ​ December 31, ​ ​ (Dollars in thousands) 2023 2022 Composition of residential loans serviced for others ​ ​ ​ ​ ​ ​ ​ ​ ​ Fixed-rate mortgage loans ​ ​ 100.0 % ​ ​ 100.0 % ​ Adjustable-rate mortgage loans ​ ​ — % ​ ​ — % ​ Total ​ ​ 100.0 % ​ ​ 100.0 % ​ Weighted average life ​ ​ 8.24 years ​ ​ 8.37 years ​ Constant Prepayment rate (CPR) ​ ​ 6.6 % ​ ​ 6.4 % ​ Weighted average discount rate ​ ​ 10.0 % ​ ​ 10.0 % ​ Effect on fair value due to change in interest rates ​ ​ ​ ​ ​ ​ ​ ​ ​ 25 basis point increase ​ $ 1,012 ​ ​ $ 774 ​ ​ 50 basis point increase ​ ​ 1,888 ​ ​ ​ 1,428 ​ ​ 25 basis point decrease ​ ​ (1,146) ​ ​ ​ (902) ​ ​ 50 basis point decrease ​ ​ (2,422) ​ ​ ​ (1,938) ​ ​

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Leases (Details) $ in Millions	Mar. 31, 2023 USD ($)
Summary of Significant Accounting Policies
Financing Receivable , Individually Evaluated for Losses ,Net Book Balance	$ 1

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Held-to-maturity Securities	$ 2,636,673	$ 2,683,241
Threshold Net Book Balance, Individually Evaluated Loans	1,000
Financing Receivable, Threshold Loss on Modifications Estimated	1,000
Interest Receivable	109,400	105,400
Liability Recorded for Expected Credit Losses on Unfunded Commitments	85,100
Other Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accrued interest receivable for investment securities	26,400	28,200
Interest Receivable	109,400	105,400
Other Liabilities
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability Recorded for Expected Credit Losses on Unfunded Commitments	$ 85,100	$ 67,200

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Reclassification and Correction Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income:
Effect to interest income on federal funds sold and interest-earning deposits with banks	$ 8,921	$ 2,859
Net effect to interest income	450,409	270,471
Effect to interest expense on deposits	55,942	4,591
Net effect to interest expense	69,146	8,953
Net effect to net interest income	381,263	261,518
Noninterest income:
Net effect to noninterest income	71,355	86,046
Net effect to net income	139,926	100,329
Correspondent banking and capital market income
Noninterest income:
Noninterest income	$ 13,594	27,950
Adjustments
Interest income:
Effect to interest income on federal funds sold and interest-earning deposits with banks		7
Net effect to interest income		7
Effect to interest expense on deposits		(37)
Net effect to interest expense		(37)
Net effect to net interest income		44
Noninterest income:
Net effect to noninterest income		(44)
Adjustments | Correspondent banking and capital market income
Noninterest income:
Noninterest income		$ (44)

Mergers and Acquisitions - Atla

Mergers and Acquisitions - Atlantic Capital (Details)		3 Months Ended		12 Months Ended
	Mar. 01, 2022 USD ($) $ / shares shares	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Mergers and Acquisitions
Goodwill		$ 1,923,106,000		$ 1,923,106,000
Deposits:
Goodwill		1,923,106,000		1,923,106,000
Consideration:
Reversal of CSFL's ending allowance for credit losses		4,627,000	$ 5,490,000	$ 23,446,000
Atlantic Capital
Mergers and Acquisitions
Shares of the common stock in exchange for each share	0.36
Purchase price	$ 657,810,000
Loans at fair value acquired after initial fair value adjustment	2,400,000,000
Estimated discount on loans	$ 54,300,000
Estimated discount on loans (as a percent)	2.24%
Loans acquired as a percentage of total loans	10%
Credit deficiencies that were identified as Purchased Credit Deteriorated ("PCD") loans.	$ 137,900,000
Goodwill	342,021,000
Acquisition costs		$ 1,400,000	$ 5,600,000
Assets
Cash and cash equivalents	250,158,000
Investment securities	703,710,000
Loans, net of allowance and mark	2,369,678,000
Premises and equipment	19,500,000
Intangible assets	20,791,000
Bank owned life insurance	74,613,000
Deferred tax asset	31,479,000
Other assets	51,554,000
Total assets	3,521,483,000
Deposits:
Noninterest-bearing	1,411,671,000
Interest-bearing	1,616,970,000
Total deposits	3,028,641,000
Federal funds purchased and securities sold under agreements to repurchase	50,000,000
Other borrowings	78,417,000
Other liabilities	48,636,000
Total liabilities	3,205,694,000
Net identifiable assets acquired over (under) liabilities assumed	315,789,000
Goodwill	342,021,000
Net assets acquired over liabilities assumed	$ 657,810,000
Consideration:
Number of shares issued as consideration | shares	7,330,803
Purchase price per share of the Company's common stock | $ / shares	$ 90
Company common stock issued and cash exchanged for fractional shares.	$ 659,791,000
Value of shares issued	659,772,000
Value of common stock issued for fractional shares	19,000
Stock option conversion	1,135,000
Restricted stock unit conversion	2,870,000
Restricted stock awards conversion (unvested awards)	(5,986,000)
Fair value of total consideration transferred	657,810,000
Reversal of fair value adjustments	17,200,000
Securities and time deposits at fair value (discount)	30,900,000
HTM reclassified to AFS	$ 237,600,000
Credit mark of the loan portfolio (as a percent)	1.40%
Credit mark of the loan portfolio	$ 34,000,000
Net credit discount of the loan portfolio (as a percent)	2.24%
Net non-credit discount of the loan portfolio	$ 54,300,000
Reversal of CSFL's ending allowance for credit losses	22,100,000
Fair value adjustment for reversal of deferred fees and costs	7,600,000
Fair value adjustment for fixed assets and leased assets	2,600,000
Core deposit intangible from a third party valuation	$ 17,500,000
Core deposit intangible from a third party valuation (as a percent)	0.63
Serving assets from third party valuation	$ 3,200,000
Servicing assets written off	19,900,000
Goodwill written off	$ 2,600,000
Deferred tax assets related to fair value adjustments with marginal tax rate	23.90%
Fair value negative adjustment for investment in low income housing	$ 1,100,000
Fair value adjustment (decrease) on write-off of prepaid assets	233,000
Fair value adjustment for receivables	154,000
Fair value adjustment for Small Business Investment Company ("SBIC') Investments	7,400,000
Issuance costs on subordinated debt	900,000
Fair value adjustment on reversal of debt issuance costs	3,400,000
Reversal of an existing unfunded commitment reserve at purchase date	2,800,000
Fair value adjustment to increase lease liabilities associated with rental facilities	1,400,000
Fair value adjustment for reversal of uncertain tax liability	700,000
Atlantic Capital | As Recorded by Atlantic Capital
Assets
Cash and cash equivalents	250,134,000
Investment securities	717,332,000
Loans, net of allowance and mark	2,394,256,000
Premises and equipment	16,892,000
Intangible assets	22,572,000
Bank owned life insurance	74,613,000
Deferred tax asset	30,231,000
Other assets	45,274,000
Total assets	3,551,304,000
Deposits:
Noninterest-bearing	1,411,671,000
Interest-bearing	1,616,970,000
Total deposits	3,028,641,000
Federal funds purchased and securities sold under agreements to repurchase	50,000,000
Other borrowings	74,131,000
Other liabilities	50,711,000
Total liabilities	3,203,483,000
Net identifiable assets acquired over (under) liabilities assumed	347,821,000
Net assets acquired over liabilities assumed	347,821,000
Atlantic Capital | Initial Fair Value Adjustments
Mergers and Acquisitions
Goodwill	342,939,000
Assets
Cash and cash equivalents	24,000
Investment securities	(13,622,000)
Loans, net of allowance and mark	(18,964,000)
Premises and equipment	2,608,000
Intangible assets	(1,781,000)
Deferred tax asset	2,273,000
Other assets	(1,277,000)
Total assets	(30,739,000)
Deposits:
Other borrowings	4,286,000
Other liabilities	(2,075,000)
Total liabilities	2,211,000
Net identifiable assets acquired over (under) liabilities assumed	(32,950,000)
Goodwill	342,939,000
Net assets acquired over liabilities assumed	309,989,000
Atlantic Capital | Subsequent Fair Value Adjustments
Mergers and Acquisitions
Goodwill	(918,000)
Assets
Loans, net of allowance and mark	(5,614,000)
Deferred tax asset	(1,025,000)
Other assets	7,557,000
Total assets	918,000
Deposits:
Net identifiable assets acquired over (under) liabilities assumed	918,000
Goodwill	$ (918,000)

Mergers and Acquisitions - Pro

Mergers and Acquisitions - Pro Forma (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Proforma amounts
Total revenues (net interest income plus noninterest income)		$ 371,196
Net interest income		281,577
Net adjusted income available to the common shareholder		$ 113,903
EPS - basic		$ 1.49
EPS - diluted		$ 1.48
Atlantic Capital
Mergers and Acquisitions
Acquisition costs	$ 1,400	$ 5,600

Securities - Amortized cost and

Securities - Amortized cost and fair value for available for sale securities (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
investment securities held-to-maturity
Amortized cost	$ 2,636,673,000		$ 2,683,241,000
Gross Unrealized Losses	(409,061,000)		(433,073,000)
Fair Value	2,227,612,000		2,250,168,000
Investment securities available for sale
Amortized cost	5,976,501,000		6,216,141,000
Gross Unrealized Gains	206,000		4,054,000
Gross Unrealized Losses	(816,708,000)		(893,373,000)
Fair Value	5,159,999,000		5,326,822,000
Gross realized gains	1,300,000
Gross realized losses	1,300,000
Securities gains, net	45,000
Atlantic Capital
Investment securities available for sale
Realized gains or losses		$ 0
Sold securities		$ 414,400,000
U.S. Treasuries
Investment securities available for sale
Amortized cost	273,035,000		272,416,000
Gross Unrealized Losses	(4,939,000)		(6,778,000)
Fair Value	268,096,000		265,638,000
U.S. Government agencies
investment securities held-to-maturity
Amortized cost	197,264,000		197,262,000
Gross Unrealized Losses	(28,175,000)		(29,787,000)
Fair Value	169,089,000		167,475,000
Investment securities available for sale
Amortized cost	246,001,000		245,972,000
Gross Unrealized Losses	(25,742,000)		(26,884,000)
Fair Value	220,259,000		219,088,000
Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
investment securities held-to-maturity
Amortized cost	1,553,373,000		1,591,646,000
Gross Unrealized Losses	(238,470,000)		(255,093,000)
Fair Value	1,314,903,000		1,336,553,000
Investment securities available for sale
Amortized cost	1,951,725,000		1,996,405,000
Gross Unrealized Losses	(278,563,000)		(298,052,000)
Fair Value	1,673,162,000		1,698,353,000
Residential collateralized mortgage-obligations issued by U.S. government agencies or sponsored enterprises
investment securities held-to-maturity
Amortized cost	468,794,000		474,660,000
Gross Unrealized Losses	(63,317,000)		(69,664,000)
Fair Value	405,477,000		404,996,000
Investment securities available for sale
Amortized cost	689,575,000		708,337,000
Gross Unrealized Losses	(98,163,000)		(107,292,000)
Fair Value	591,412,000		601,045,000
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
investment securities held-to-maturity
Amortized cost	360,962,000		362,586,000
Gross Unrealized Losses	(68,141,000)		(66,304,000)
Fair Value	292,821,000		296,282,000
Investment securities available for sale
Amortized cost	1,180,323,000		1,196,700,000
Gross Unrealized Gains	8,000		2,542,000
Gross Unrealized Losses	(192,894,000)		(198,844,000)
Fair Value	987,437,000		1,000,398,000
State and municipal obligations
Investment securities available for sale
Amortized cost	1,138,809,000		1,269,525,000
Gross Unrealized Gains	4,000		1,210,000
Gross Unrealized Losses	(171,856,000)		(205,883,000)
Fair Value	966,957,000		1,064,852,000
Small Business Administration loan-backed securities
investment securities held-to-maturity
Amortized cost	56,280,000		57,087,000
Gross Unrealized Losses	(10,958,000)		(12,225,000)
Fair Value	45,322,000		44,862,000
Investment securities available for sale
Amortized cost	466,462,000		491,203,000
Gross Unrealized Gains	194,000		302,000
Gross Unrealized Losses	(41,164,000)		(46,695,000)
Fair Value	425,492,000		444,810,000
Corporate securities.
Investment securities available for sale
Amortized cost	30,571,000		35,583,000
Gross Unrealized Losses	(3,387,000)		(2,945,000)
Fair Value	$ 27,184,000		$ 32,638,000

Securities - Carrying value of

Securities - Carrying value of other investment securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Other investment securities
Carrying Value	$ 217,991	$ 179,717
Federal Home Loan Bank stock
Other investment securities
Carrying Value	53,335	15,085
Federal Reserve Bank Stock
Other investment securities
Carrying Value	150,261	150,261
Investment in unconsolidated subsidiaries
Other investment securities
Carrying Value	3,563	3,563
Other nonmarketable investment securities
Other investment securities
Carrying Value	$ 10,832	$ 10,808

Securities - Amortized cost a_2

Securities - Amortized cost and fair value by contractual maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Amortized Cost
Due after one year through five years	$ 101,073
Due after five years through ten years	382,261
Due after ten years	2,153,339
Total	2,636,673	$ 2,683,241
Fair Value
Due after one year through five years	94,058
Due after five years through ten years	337,412
Due after ten years	1,796,142
Fair Value	2,227,612	2,250,168
Amortized Cost
Due in one year or less	254,326
Due after one year through five years	309,053
Due after five years through ten years	1,148,155
Due after ten years	4,264,967
Amortized Cost	5,976,501	6,216,141
Fair Value
Due in one year or less	250,191
Due after one year through five years	295,225
Due after five years through ten years	1,001,653
Due after ten years	3,612,930
Fair Value	$ 5,159,999	$ 5,326,822

Securities - Securities with gr

Securities - Securities with gross unrealized losses (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Securities Held to Maturity, Gross Unrealized Losses
Less Than Twelve Months	$ 14,601	$ 115,297
Twelve Months or More	394,460	317,776
Securities Held to Maturity, Fair Value
Less Than Twelve Months	103,696	952,682
Twelve Months or More	2,123,916	1,297,486
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months	20,661	197,789
Twelve Months or More	796,047	695,584
Securities Available for Sale, Fair Value
Less Than Twelve Months	427,481	2,082,068
Twelve Months or More	4,656,179	3,073,871
U.S. Treasuries
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months		6,778
Twelve Months or More	4,939
Securities Available for Sale, Fair Value
Less Than Twelve Months		265,638
Twelve Months or More	268,096
U.S. Government agencies
Securities Held to Maturity, Gross Unrealized Losses
Less Than Twelve Months		5,514
Twelve Months or More	28,175	24,273
Securities Held to Maturity, Fair Value
Less Than Twelve Months		78,833
Twelve Months or More	169,089	88,642
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months	1,065	8,193
Twelve Months or More	24,677	18,691
Securities Available for Sale, Fair Value
Less Than Twelve Months	53,935	138,807
Twelve Months or More	166,324	80,281
Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Securities Held to Maturity, Gross Unrealized Losses
Less Than Twelve Months		65,181
Twelve Months or More	238,470	189,912
Securities Held to Maturity, Fair Value
Less Than Twelve Months		513,086
Twelve Months or More	1,314,903	823,467
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months	1,027	42,767
Twelve Months or More	277,536	255,285
Securities Available for Sale, Fair Value
Less Than Twelve Months	32,334	459,773
Twelve Months or More	1,640,828	1,238,580
Residential collateralized mortgage-obligations issued by U.S. government agencies or sponsored enterprises
Securities Held to Maturity, Gross Unrealized Losses
Less Than Twelve Months	1,187	30,284
Twelve Months or More	62,130	39,380
Securities Held to Maturity, Fair Value
Less Than Twelve Months	45,925	277,868
Twelve Months or More	359,552	127,128
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months	2,650	21,450
Twelve Months or More	95,513	85,842
Securities Available for Sale, Fair Value
Less Than Twelve Months	73,464	274,082
Twelve Months or More	517,948	326,963
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Securities Held to Maturity, Gross Unrealized Losses
Less Than Twelve Months	13,414	14,318
Twelve Months or More	54,727	51,986
Securities Held to Maturity, Fair Value
Less Than Twelve Months	57,771	82,895
Twelve Months or More	235,050	213,387
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months	10,606	17,156
Twelve Months or More	182,288	181,688
Securities Available for Sale, Fair Value
Less Than Twelve Months	107,009	206,228
Twelve Months or More	874,332	767,002
State and municipal obligations
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months	4,250	97,084
Twelve Months or More	167,606	108,799
Securities Available for Sale, Fair Value
Less Than Twelve Months	74,784	616,631
Twelve Months or More	888,984	391,848
Small Business Administration loan-backed securities
Securities Held to Maturity, Gross Unrealized Losses
Twelve Months or More	10,958	12,225
Securities Held to Maturity, Fair Value
Twelve Months or More	45,322	44,862
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months	428	2,152
Twelve Months or More	40,736	44,543
Securities Available for Sale, Fair Value
Less Than Twelve Months	80,092	92,535
Twelve Months or More	278,346	264,933
Corporate securities.
Securities Available for Sale, Gross Unrealized Losses
Less Than Twelve Months	635	2,209
Twelve Months or More	2,752	736
Securities Available for Sale, Fair Value
Less Than Twelve Months	5,863	28,374
Twelve Months or More	$ 21,321	$ 4,264

Securities - Securities Pledged

Securities - Securities Pledged as Collateral (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment Securities
Carrying amount of the securities pledged to collateralize repurchase agreements	$ 8,014,663	$ 8,189,780
Asset Pledged as Collateral [Member]
Investment Securities
Carrying amount of the securities pledged to collateralize repurchase agreements	2,400,000	2,600,000
Asset Pledged as Collateral [Member] | Public Funds Deposits
Investment Securities
Carrying amount of the securities pledged to collateralize repurchase agreements	1,900,000	1,900,000
Asset Pledged as Collateral [Member] | FHLB Advances
Investment Securities
Carrying amount of the securities pledged to collateralize repurchase agreements	415,700	596,100
Asset Pledged as Collateral [Member] | Interest rate swap
Investment Securities
Carrying amount of the securities pledged to collateralize repurchase agreements	$ 113,200	$ 114,900

Securities - Trading Securities

Securities - Trading Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Investment Securities
Trading securities	$ 16,039	$ 31,263
U.S. Government agencies
Investment Securities
Trading securities	3,925	11,190
Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Investment Securities
Trading securities	3,439
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Investment Securities
Trading securities	1,304	4,589
State and municipal obligations
Investment Securities
Trading securities	7,122	13,993
Other debt securities
Investment Securities
Trading securities	$ 249	$ 1,491

Securities - Net losses on trad

Securities - Net losses on trading securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2021
Securities
Net losses on sales transaction	$ (139)	$ (1,239)
Net mark to mark losses	(6)	(1,976)
Net losses on trading securities	$ (145)	$ (3,215)

Loans - Summary of loans (Detai

Loans - Summary of loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Summary of Loans
Total loans	$ 30,696,142	$ 30,177,862
Less allowance for credit losses	(370,645)	(356,444)	$ (300,396)	$ (301,807)
Loans, net	30,325,497	29,821,418
Deferred costs	55,300	49,700
Unamortized Discounts	64,700	72,100
Interest Receivable	109,400	105,400
Construction and land development
Summary of Loans
Total loans	2,749,290	2,860,360
Commercial non-owner occupied
Summary of Loans
Total loans	8,236,216	8,072,959
Consumer Owner Occupied Loans
Summary of Loans
Total loans	5,528,546	5,162,042
Home equity loans
Summary of Loans
Total loans	1,332,285	1,313,168
Commercial owner occupied real estate loan
Summary of Loans
Total loans	5,522,514	5,460,193
Commercial and industrial
Summary of Loans
Total loans	5,321,306	5,313,483
Other income producing property
Summary of Loans
Total loans	721,291	696,242
Consumer loans
Summary of Loans
Total loans	1,277,549	1,278,426
Other loans
Summary of Loans
Total loans	7,145	20,989
Commercial loans
Summary of Loans
Total loans	21,575,799	21,430,337
Commercial loans | Construction and land development
Summary of Loans
Total loans	1,855,548	1,956,300
Commercial loans | Commercial non-owner occupied
Summary of Loans
Total loans	8,236,216	8,072,959
Commercial loans | Commercial non-owner occupied real estate.
Summary of Loans
Total loans	5,522,514	5,460,193
Commercial loans | Consumer Owner Occupied Loans
Summary of Loans
Total loans	33,237	30,741
Commercial loans | Commercial owner occupied real estate loan
Summary of Loans
Total loans	5,522,514	5,460,193
Commercial loans | Commercial and industrial
Summary of Loans
Total loans	5,321,306	5,313,483
Commercial loans | Other income producing property
Summary of Loans
Total loans	599,833	575,672
Commercial loans | Other loans
Summary of Loans
Total loans	7,145	20,989
Consumer portfolio loans
Summary of Loans
Total loans	9,120,343	8,747,525
Consumer portfolio loans | Construction and land development
Summary of Loans
Total loans	893,742	904,060
Consumer portfolio loans | Consumer Owner Occupied Loans
Summary of Loans
Total loans	5,495,309	5,131,301
Consumer portfolio loans | Home equity loans
Summary of Loans
Total loans	1,332,285	1,313,168
Consumer portfolio loans | Other income producing property
Summary of Loans
Total loans	121,458	120,570
Consumer portfolio loans | Consumer loans
Summary of Loans
Total loans	$ 1,277,549	$ 1,278,426

Loans - Loans purchased through

Loans - Loans purchased through its acquisition of Atlantic Capital (Details) - Atlantic Capital $ in Thousands	Mar. 01, 2022 USD ($)
Business Acquisition [Line Items]
Book value of acquired loans at acquisition	$ 137,874
Allowance for credit losses at acquisition	(13,758)
Non-credit discount at acquisition	(5,943)
Carrying value or book value of acquired loans at acquisition	$ 118,173

Loans - Credit risk profile by

Loans - Credit risk profile by risk grade of commercial and consumer loans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Loans
Amortized Cost Basis by Origination Year - 2023	$ 1,200,329		$ 8,589,197
Amortized Cost Basis by Origination Year - 2022	8,596,478		6,907,684
Amortized Cost Basis by Origination Year - 2021	6,828,157		3,112,648
Amortized Cost Basis by Origination Year - 2020	3,010,610		2,533,623
Amortized Cost Basis by Origination Year - 2019	2,398,611		1,539,466
Amortized Cost Basis by Origination Year - Prior	5,396,828		4,173,570
Amortized Cost Basis by Origination Year - Revolving	3,265,129		3,321,674
Total loans	30,696,142		30,177,862
Current-period gross charge-offs - 2023	890		291
Current-period gross charge-offs - 2022	524		3,478
Current-period gross charge-offs - 2021	311		556
Current-period gross charge-offs - 2020	132		2,063
Current-period gross charge-offs - 2019	249		2,299
Current-period gross charge-offs - Prior	526		4,842
Current-period gross charge-offs - Revolving	1,995		9,917
Current-period gross charge-offs - Total	4,627	$ 5,490	23,446
30 days past due
Loans
Total loans	51,733		68,416
60 days past due
Loans
Total loans	30,173		31,607
90 days past due
Loans
Total loans	3,650		4,350
Construction and land development
Loans
Total loans	2,749,290		2,860,360
Construction and land development | 30 days past due
Loans
Total loans	980		2,146
Construction and land development | 60 days past due
Loans
Total loans	4,050		3,653
Commercial non-owner occupied
Loans
Total loans	8,236,216		8,072,959
Commercial non-owner occupied | 30 days past due
Loans
Total loans	4,410		1,158
Commercial non-owner occupied | 60 days past due
Loans
Total loans	1,778		978
Commercial non-owner occupied | 90 days past due
Loans
Total loans			77
Commercial owner occupied real estate loan
Loans
Total loans	5,522,514		5,460,193
Commercial owner occupied real estate loan | 30 days past due
Loans
Total loans	3,841		10,748
Commercial owner occupied real estate loan | 60 days past due
Loans
Total loans	4,552		2,059
Commercial owner occupied real estate loan | 90 days past due
Loans
Total loans	1,665		2,231
Commercial and industrial
Loans
Total loans	5,321,306		5,313,483
Commercial and industrial | 30 days past due
Loans
Total loans	21,931		24,500
Commercial and industrial | 60 days past due
Loans
Total loans	9,618		11,677
Commercial and industrial | 90 days past due
Loans
Total loans	1,837		1,704
Other income producing property
Loans
Total loans	721,291		696,242
Other income producing property | 30 days past due
Loans
Total loans	2,224		1,623
Other income producing property | 60 days past due
Loans
Total loans	156		1,480
Other income producing property | 90 days past due
Loans
Total loans	147		298
Consumer Owner Occupied Loans
Loans
Total loans	5,528,546		5,162,042
Consumer Owner Occupied Loans | 30 days past due
Loans
Total loans	2,521		6,001
Consumer Owner Occupied Loans | 60 days past due
Loans
Total loans	1,344		744
Consumer Owner Occupied Loans | 90 days past due
Loans
Total loans			40
Home equity loans
Loans
Total loans	1,332,285		1,313,168
Home equity loans | 30 days past due
Loans
Total loans	2,811		2,527
Home equity loans | 60 days past due
Loans
Total loans	673		361
Consumer loans
Loans
Total loans	1,277,549		1,278,426
Consumer loans | 30 days past due
Loans
Total loans	13,015		19,713
Consumer loans | 60 days past due
Loans
Total loans	8,002		10,655
Consumer loans | 90 days past due
Loans
Total loans	1
Other loans
Loans
Total loans	7,145		20,989
Commercial loans
Loans
Amortized Cost Basis by Origination Year - 2023	825,684		5,965,333
Amortized Cost Basis by Origination Year - 2022	5,854,328		4,853,572
Amortized Cost Basis by Origination Year - 2021	4,774,481		2,281,793
Amortized Cost Basis by Origination Year - 2020	2,205,832		2,112,230
Amortized Cost Basis by Origination Year - 2019	1,993,659		1,292,239
Amortized Cost Basis by Origination Year - Prior	4,192,766		3,156,201
Amortized Cost Basis by Origination Year - Revolving	1,729,049		1,768,969
Total loans	21,575,799		21,430,337
Current-period gross charge-offs - 2023	2		12
Current-period gross charge-offs - 2022	1,097		2,825
Current-period gross charge-offs - 2021	211		198
Current-period gross charge-offs - 2020	14		1,773
Current-period gross charge-offs - 2019	149		2,214
Current-period gross charge-offs - Prior	280		3,828
Current-period gross charge-offs - Revolving	104		1,792
Current-period gross charge-offs - Total	1,857		12,642
Commercial loans | Pass
Loans
Amortized Cost Basis by Origination Year - 2023	815,860		5,911,188
Amortized Cost Basis by Origination Year - 2022	5,805,698		4,719,732
Amortized Cost Basis by Origination Year - 2021	4,640,950		2,245,766
Amortized Cost Basis by Origination Year - 2020	2,160,178		2,053,868
Amortized Cost Basis by Origination Year - 2019	1,929,180		1,227,113
Amortized Cost Basis by Origination Year - Prior	3,962,901		2,968,415
Amortized Cost Basis by Origination Year - Revolving	1,656,465		1,698,688
Total loans	20,971,232		20,824,770
Commercial loans | Special mention
Loans
Amortized Cost Basis by Origination Year - 2023	1,050		20,216
Amortized Cost Basis by Origination Year - 2022	22,876		35,235
Amortized Cost Basis by Origination Year - 2021	31,956		9,381
Amortized Cost Basis by Origination Year - 2020	17,557		21,567
Amortized Cost Basis by Origination Year - 2019	32,391		42,014
Amortized Cost Basis by Origination Year - Prior	113,821		73,870
Amortized Cost Basis by Origination Year - Revolving	26,210		33,035
Total loans	245,861		235,318
Commercial loans | Substandard
Loans
Amortized Cost Basis by Origination Year - 2023	8,773		33,528
Amortized Cost Basis by Origination Year - 2022	25,355		98,604
Amortized Cost Basis by Origination Year - 2021	101,557		26,645
Amortized Cost Basis by Origination Year - 2020	28,095		36,716
Amortized Cost Basis by Origination Year - 2019	32,088		22,956
Amortized Cost Basis by Origination Year - Prior	116,011		113,348
Amortized Cost Basis by Origination Year - Revolving	46,372		37,244
Total loans	358,251		369,041
Commercial loans | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2023	1		401
Amortized Cost Basis by Origination Year - 2022	399		1
Amortized Cost Basis by Origination Year - 2021	18		1
Amortized Cost Basis by Origination Year - 2020	2		79
Amortized Cost Basis by Origination Year - 2019			156
Amortized Cost Basis by Origination Year - Prior	33		568
Amortized Cost Basis by Origination Year - Revolving	2		2
Total loans	455		1,208
Commercial loans | Construction and land development
Loans
Amortized Cost Basis by Origination Year - 2023	67,497		877,608
Amortized Cost Basis by Origination Year - 2022	900,190		754,382
Amortized Cost Basis by Origination Year - 2021	604,200		135,275
Amortized Cost Basis by Origination Year - 2020	109,760		65,841
Amortized Cost Basis by Origination Year - 2019	55,635		21,740
Amortized Cost Basis by Origination Year - Prior	43,127		35,798
Amortized Cost Basis by Origination Year - Revolving	75,139		65,656
Total loans	1,855,548		1,956,300
Commercial loans | Construction and land development | Pass
Loans
Amortized Cost Basis by Origination Year - 2023	65,979		875,751
Amortized Cost Basis by Origination Year - 2022	898,029		742,985
Amortized Cost Basis by Origination Year - 2021	602,843		134,996
Amortized Cost Basis by Origination Year - 2020	109,487		63,439
Amortized Cost Basis by Origination Year - 2019	34,046		14,521
Amortized Cost Basis by Origination Year - Prior	33,860		29,442
Amortized Cost Basis by Origination Year - Revolving	75,139		65,656
Total loans	1,819,383		1,926,790
Commercial loans | Construction and land development | Special mention
Loans
Amortized Cost Basis by Origination Year - 2023			1,643
Amortized Cost Basis by Origination Year - 2022	2,022		988
Amortized Cost Basis by Origination Year - 2021	1,193		268
Amortized Cost Basis by Origination Year - 2020	264		76
Amortized Cost Basis by Origination Year - 2019	20,255		7,219
Amortized Cost Basis by Origination Year - Prior	7,671		2,068
Total loans	31,405		12,262
Commercial loans | Construction and land development | Substandard
Loans
Amortized Cost Basis by Origination Year - 2023	1,518		214
Amortized Cost Basis by Origination Year - 2022	139		10,409
Amortized Cost Basis by Origination Year - 2021	164		11
Amortized Cost Basis by Origination Year - 2020	9		2,326
Amortized Cost Basis by Origination Year - 2019	1,334
Amortized Cost Basis by Origination Year - Prior	1,590		4,282
Total loans	4,754		17,242
Commercial loans | Construction and land development | Doubtful
Loans
Amortized Cost Basis by Origination Year - Prior	6		6
Total loans	6		6
Commercial loans | Commercial non-owner occupied
Loans
Amortized Cost Basis by Origination Year - 2023	147,181		2,266,778
Amortized Cost Basis by Origination Year - 2022	2,354,196		1,878,862
Amortized Cost Basis by Origination Year - 2021	2,003,846		818,336
Amortized Cost Basis by Origination Year - 2020	812,905		980,205
Amortized Cost Basis by Origination Year - 2019	908,393		536,889
Amortized Cost Basis by Origination Year - Prior	1,920,202		1,475,873
Amortized Cost Basis by Origination Year - Revolving	89,493		116,016
Total loans	8,236,216		8,072,959
Current-period gross charge-offs - 2023			8
Current-period gross charge-offs - 2021	51
Current-period gross charge-offs - Prior			360
Current-period gross charge-offs - Total	51		368
Commercial loans | Commercial non-owner occupied | Pass
Loans
Amortized Cost Basis by Origination Year - 2023	144,211		2,245,943
Amortized Cost Basis by Origination Year - 2022	2,339,057		1,849,079
Amortized Cost Basis by Origination Year - 2021	1,964,957		816,791
Amortized Cost Basis by Origination Year - 2020	799,333		959,707
Amortized Cost Basis by Origination Year - 2019	892,806		506,350
Amortized Cost Basis by Origination Year - Prior	1,834,435		1,417,397
Amortized Cost Basis by Origination Year - Revolving	89,240		108,759
Total loans	8,064,039		7,904,026
Commercial loans | Commercial non-owner occupied | Special mention
Loans
Amortized Cost Basis by Origination Year - 2023	95		7,579
Amortized Cost Basis by Origination Year - 2022	9,442		4,225
Amortized Cost Basis by Origination Year - 2021	708		936
Amortized Cost Basis by Origination Year - 2020	12,167		11,036
Amortized Cost Basis by Origination Year - 2019	5,423		24,067
Amortized Cost Basis by Origination Year - Prior	60,130		32,110
Amortized Cost Basis by Origination Year - Revolving			5,000
Total loans	87,965		84,953
Commercial loans | Commercial non-owner occupied | Substandard
Loans
Amortized Cost Basis by Origination Year - 2023	2,875		13,256
Amortized Cost Basis by Origination Year - 2022	5,697		25,557
Amortized Cost Basis by Origination Year - 2021	38,180		609
Amortized Cost Basis by Origination Year - 2020	1,405		9,383
Amortized Cost Basis by Origination Year - 2019	10,164		6,472
Amortized Cost Basis by Origination Year - Prior	25,637		26,366
Amortized Cost Basis by Origination Year - Revolving	253		2,257
Total loans	84,211		83,900
Commercial loans | Commercial non-owner occupied | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2022			1
Amortized Cost Basis by Origination Year - 2021	1
Amortized Cost Basis by Origination Year - 2020			79
Total loans	1		80
Commercial loans | Commercial owner occupied real estate loan
Loans
Amortized Cost Basis by Origination Year - 2023	167,506		1,063,043
Amortized Cost Basis by Origination Year - 2022	1,070,977		1,195,762
Amortized Cost Basis by Origination Year - 2021	1,214,311		748,386
Amortized Cost Basis by Origination Year - 2020	735,903		734,105
Amortized Cost Basis by Origination Year - 2019	719,397		463,144
Amortized Cost Basis by Origination Year - Prior	1,543,263		1,178,058
Amortized Cost Basis by Origination Year - Revolving	71,157		77,695
Total loans	5,522,514		5,460,193
Current-period gross charge-offs - 2020			1,143
Current-period gross charge-offs - Prior			833
Current-period gross charge-offs - Total			1,976
Commercial loans | Commercial owner occupied real estate loan | Pass
Loans
Amortized Cost Basis by Origination Year - 2023	165,248		1,046,562
Amortized Cost Basis by Origination Year - 2022	1,052,756		1,136,289
Amortized Cost Basis by Origination Year - 2021	1,154,709		725,040
Amortized Cost Basis by Origination Year - 2020	712,735		709,669
Amortized Cost Basis by Origination Year - 2019	702,606		446,497
Amortized Cost Basis by Origination Year - Prior	1,437,016		1,080,522
Amortized Cost Basis by Origination Year - Revolving	70,057		75,506
Total loans	5,295,127		5,220,085
Commercial loans | Commercial owner occupied real estate loan | Special mention
Loans
Amortized Cost Basis by Origination Year - 2023	342		3,620
Amortized Cost Basis by Origination Year - 2022	3,576		25,263
Amortized Cost Basis by Origination Year - 2021	24,689		3,383
Amortized Cost Basis by Origination Year - 2020	3,285		7,934
Amortized Cost Basis by Origination Year - 2019	4,397		7,160
Amortized Cost Basis by Origination Year - Prior	37,842		34,724
Amortized Cost Basis by Origination Year - Revolving	1,020		1,294
Total loans	75,151		83,378
Commercial loans | Commercial owner occupied real estate loan | Substandard
Loans
Amortized Cost Basis by Origination Year - 2023	1,916		12,861
Amortized Cost Basis by Origination Year - 2022	14,645		34,210
Amortized Cost Basis by Origination Year - 2021	34,913		19,962
Amortized Cost Basis by Origination Year - 2020	19,882		16,502
Amortized Cost Basis by Origination Year - 2019	12,394		9,487
Amortized Cost Basis by Origination Year - Prior	68,401		62,808
Amortized Cost Basis by Origination Year - Revolving	80		895
Total loans	152,231		156,725
Commercial loans | Commercial owner occupied real estate loan | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2021			1
Amortized Cost Basis by Origination Year - 2020	1
Amortized Cost Basis by Origination Year - Prior	4		4
Total loans	5		5
Commercial loans | Commercial and industrial
Loans
Amortized Cost Basis by Origination Year - 2023	420,087		1,578,396
Amortized Cost Basis by Origination Year - 2022	1,359,889		927,124
Amortized Cost Basis by Origination Year - 2021	839,394		514,826
Amortized Cost Basis by Origination Year - 2020	484,589		282,896
Amortized Cost Basis by Origination Year - 2019	261,737		222,838
Amortized Cost Basis by Origination Year - Prior	532,602		343,500
Amortized Cost Basis by Origination Year - Revolving	1,423,008		1,443,903
Total loans	5,321,306		5,313,483
Current-period gross charge-offs - 2023	2		4
Current-period gross charge-offs - 2022	1,097		2,825
Current-period gross charge-offs - 2021	160		198
Current-period gross charge-offs - 2020	14		630
Current-period gross charge-offs - 2019	149		2,214
Current-period gross charge-offs - Prior	280		2,589
Current-period gross charge-offs - Revolving	104		1,742
Current-period gross charge-offs - Total	1,806		10,202
Commercial loans | Commercial and industrial | Pass
Loans
Amortized Cost Basis by Origination Year - 2023	417,089		1,566,203
Amortized Cost Basis by Origination Year - 2022	1,349,157		895,368
Amortized Cost Basis by Origination Year - 2021	807,583		506,655
Amortized Cost Basis by Origination Year - 2020	478,312		274,446
Amortized Cost Basis by Origination Year - 2019	253,680		212,522
Amortized Cost Basis by Origination Year - Prior	514,686		333,286
Amortized Cost Basis by Origination Year - Revolving	1,354,618		1,386,678
Total loans	5,175,125		5,175,158
Commercial loans | Commercial and industrial | Special mention
Loans
Amortized Cost Basis by Origination Year - 2023	533		5,885
Amortized Cost Basis by Origination Year - 2022	6,705		3,782
Amortized Cost Basis by Origination Year - 2021	4,488		3,401
Amortized Cost Basis by Origination Year - 2020	702		1,859
Amortized Cost Basis by Origination Year - 2019	1,698		3,378
Amortized Cost Basis by Origination Year - Prior	4,791		1,316
Amortized Cost Basis by Origination Year - Revolving	23,114		24,347
Total loans	42,031		43,968
Commercial loans | Commercial and industrial | Substandard
Loans
Amortized Cost Basis by Origination Year - 2023	2,464		6,308
Amortized Cost Basis by Origination Year - 2022	4,025		27,974
Amortized Cost Basis by Origination Year - 2021	27,306		4,770
Amortized Cost Basis by Origination Year - 2020	5,574		6,591
Amortized Cost Basis by Origination Year - 2019	6,359		6,783
Amortized Cost Basis by Origination Year - Prior	13,109		8,476
Amortized Cost Basis by Origination Year - Revolving	45,274		32,876
Total loans	104,111		93,778
Commercial loans | Commercial and industrial | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2023	1
Amortized Cost Basis by Origination Year - 2022	2
Amortized Cost Basis by Origination Year - 2021	17
Amortized Cost Basis by Origination Year - 2020	1
Amortized Cost Basis by Origination Year - 2019			155
Amortized Cost Basis by Origination Year - Prior	16		422
Amortized Cost Basis by Origination Year - Revolving	2		2
Total loans	39		579
Commercial loans | Other income producing property
Loans
Amortized Cost Basis by Origination Year - 2023	14,919		152,022
Amortized Cost Basis by Origination Year - 2022	163,801		94,203
Amortized Cost Basis by Origination Year - 2021	109,500		63,011
Amortized Cost Basis by Origination Year - 2020	59,892		46,867
Amortized Cost Basis by Origination Year - 2019	46,233		47,559
Amortized Cost Basis by Origination Year - Prior	152,911		122,438
Amortized Cost Basis by Origination Year - Revolving	52,577		49,572
Total loans	599,833		575,672
Current-period gross charge-offs - Prior			46
Current-period gross charge-offs - Revolving			50
Current-period gross charge-offs - Total			96
Commercial loans | Other income producing property | Pass
Loans
Amortized Cost Basis by Origination Year - 2023	14,839		149,793
Amortized Cost Basis by Origination Year - 2022	161,959		92,887
Amortized Cost Basis by Origination Year - 2021	107,741		60,473
Amortized Cost Basis by Origination Year - 2020	58,591		46,189
Amortized Cost Basis by Origination Year - 2019	45,660		47,155
Amortized Cost Basis by Origination Year - Prior	142,437		107,436
Amortized Cost Basis by Origination Year - Revolving	49,887		46,179
Total loans	581,114		550,112
Commercial loans | Other income producing property | Special mention
Loans
Amortized Cost Basis by Origination Year - 2023	80		952
Amortized Cost Basis by Origination Year - 2022	603		957
Amortized Cost Basis by Origination Year - 2021	859		1,257
Amortized Cost Basis by Origination Year - 2020	1,007		378
Amortized Cost Basis by Origination Year - 2019	337		190
Amortized Cost Basis by Origination Year - Prior	3,387		3,652
Amortized Cost Basis by Origination Year - Revolving	2,076		2,328
Total loans	8,349		9,714
Commercial loans | Other income producing property | Substandard
Loans
Amortized Cost Basis by Origination Year - 2023			876
Amortized Cost Basis by Origination Year - 2022	842		359
Amortized Cost Basis by Origination Year - 2021	900		1,281
Amortized Cost Basis by Origination Year - 2020	294		300
Amortized Cost Basis by Origination Year - 2019	236		214
Amortized Cost Basis by Origination Year - Prior	7,081		11,214
Amortized Cost Basis by Origination Year - Revolving	614		1,065
Total loans	9,967		15,309
Commercial loans | Other income producing property | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2023			401
Amortized Cost Basis by Origination Year - 2022	397
Amortized Cost Basis by Origination Year - Prior	6		136
Total loans	403		537
Commercial loans | Consumer Owner Occupied Loans
Loans
Amortized Cost Basis by Origination Year - 2023	1,349		6,497
Amortized Cost Basis by Origination Year - 2022	5,275		3,239
Amortized Cost Basis by Origination Year - 2021	3,230		1,959
Amortized Cost Basis by Origination Year - 2020	2,783		2,316
Amortized Cost Basis by Origination Year - 2019	2,264		69
Amortized Cost Basis by Origination Year - Prior	661		534
Amortized Cost Basis by Origination Year - Revolving	17,675		16,127
Total loans	33,237		30,741
Commercial loans | Consumer Owner Occupied Loans | Pass
Loans
Amortized Cost Basis by Origination Year - 2023	1,349		5,947
Amortized Cost Basis by Origination Year - 2022	4,740		3,124
Amortized Cost Basis by Origination Year - 2021	3,117		1,811
Amortized Cost Basis by Origination Year - 2020	1,720		418
Amortized Cost Basis by Origination Year - 2019	382		68
Amortized Cost Basis by Origination Year - Prior	467		332
Amortized Cost Basis by Origination Year - Revolving	17,524		15,910
Total loans	29,299		27,610
Commercial loans | Consumer Owner Occupied Loans | Special mention
Loans
Amortized Cost Basis by Origination Year - 2023			537
Amortized Cost Basis by Origination Year - 2022	528		20
Amortized Cost Basis by Origination Year - 2021	19		136
Amortized Cost Basis by Origination Year - 2020	132		284
Amortized Cost Basis by Origination Year - 2019	281
Amortized Cost Basis by Origination Year - Revolving			66
Total loans	960		1,043
Commercial loans | Consumer Owner Occupied Loans | Substandard
Loans
Amortized Cost Basis by Origination Year - 2023			13
Amortized Cost Basis by Origination Year - 2022	7		95
Amortized Cost Basis by Origination Year - 2021	94		12
Amortized Cost Basis by Origination Year - 2020	931		1,614
Amortized Cost Basis by Origination Year - 2019	1,601
Amortized Cost Basis by Origination Year - Prior	193		202
Amortized Cost Basis by Origination Year - Revolving	151		151
Total loans	2,977		2,087
Commercial loans | Consumer Owner Occupied Loans | Doubtful
Loans
Amortized Cost Basis by Origination Year - 2019			1
Amortized Cost Basis by Origination Year - Prior	1
Total loans	1		1
Commercial loans | Other loans
Loans
Amortized Cost Basis by Origination Year - 2023	7,145		20,989
Total loans	7,145		20,989
Commercial loans | Other loans | Pass
Loans
Amortized Cost Basis by Origination Year - 2023	7,145		20,989
Total loans	7,145		20,989
Consumer portfolio loans
Loans
Amortized Cost Basis by Origination Year - 2023	374,645		2,623,864
Amortized Cost Basis by Origination Year - 2022	2,742,150		2,054,112
Amortized Cost Basis by Origination Year - 2021	2,053,676		830,855
Amortized Cost Basis by Origination Year - 2020	804,778		421,393
Amortized Cost Basis by Origination Year - 2019	404,952		247,227
Amortized Cost Basis by Origination Year - Prior	1,204,062		1,017,369
Amortized Cost Basis by Origination Year - Revolving	1,536,080		1,552,705
Total loans	9,120,343		8,747,525
Current-period gross charge-offs - 2023	20		279
Current-period gross charge-offs - 2022	295		653
Current-period gross charge-offs - 2021	100		358
Current-period gross charge-offs - 2020	118		290
Current-period gross charge-offs - 2019	100		85
Current-period gross charge-offs - Prior	246		1,014
Current-period gross charge-offs - Revolving	1,891		8,125
Current-period gross charge-offs - Total	2,770		10,804
Consumer portfolio loans | Current due
Loans
Amortized Cost Basis by Origination Year - 2023	374,645		2,621,392
Amortized Cost Basis by Origination Year - 2022	2,739,197		2,051,220
Amortized Cost Basis by Origination Year - 2021	2,052,154		826,906
Amortized Cost Basis by Origination Year - 2020	802,813		419,742
Amortized Cost Basis by Origination Year - 2019	403,035		245,166
Amortized Cost Basis by Origination Year - Prior	1,192,480		1,005,834
Amortized Cost Basis by Origination Year - Revolving	1,512,723		1,522,165
Total loans	9,077,047		8,692,425
Consumer portfolio loans | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			2,036
Amortized Cost Basis by Origination Year - 2022	1,288		1,448
Amortized Cost Basis by Origination Year - 2021	900		1,914
Amortized Cost Basis by Origination Year - 2020	360		972
Amortized Cost Basis by Origination Year - 2019	868		776
Amortized Cost Basis by Origination Year - Prior	5,029		3,810
Amortized Cost Basis by Origination Year - Revolving	13,476		19,057
Total loans	21,921		30,013
Consumer portfolio loans | 60 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			310
Amortized Cost Basis by Origination Year - 2022	533		440
Amortized Cost Basis by Origination Year - 2021	116		705
Amortized Cost Basis by Origination Year - 2020	691		72
Amortized Cost Basis by Origination Year - 2019	55		456
Amortized Cost Basis by Origination Year - Prior	1,301		2,256
Amortized Cost Basis by Origination Year - Revolving	8,025		10,376
Total loans	10,721		14,615
Consumer portfolio loans | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			126
Amortized Cost Basis by Origination Year - 2022	1,132		1,004
Amortized Cost Basis by Origination Year - 2021	506		1,330
Amortized Cost Basis by Origination Year - 2020	914		607
Amortized Cost Basis by Origination Year - 2019	994		829
Amortized Cost Basis by Origination Year - Prior	5,252		5,469
Amortized Cost Basis by Origination Year - Revolving	1,856		1,107
Total loans	10,654		10,472
Consumer portfolio loans | Construction and land development
Loans
Amortized Cost Basis by Origination Year - 2023	20,979		466,477
Amortized Cost Basis by Origination Year - 2022	554,952		351,485
Amortized Cost Basis by Origination Year - 2021	251,650		50,908
Amortized Cost Basis by Origination Year - 2020	35,833		14,110
Amortized Cost Basis by Origination Year - 2019	11,006		7,029
Amortized Cost Basis by Origination Year - Prior	18,707		13,672
Amortized Cost Basis by Origination Year - Revolving	615		379
Total loans	893,742		904,060
Current-period gross charge-offs - 2021			21
Current-period gross charge-offs - Prior			4
Current-period gross charge-offs - Total			25
Consumer portfolio loans | Construction and land development | Current due
Loans
Amortized Cost Basis by Origination Year - 2023	20,979		466,475
Amortized Cost Basis by Origination Year - 2022	554,627		351,485
Amortized Cost Basis by Origination Year - 2021	251,650		50,472
Amortized Cost Basis by Origination Year - 2020	35,810		14,053
Amortized Cost Basis by Origination Year - 2019	11,006		7,006
Amortized Cost Basis by Origination Year - Prior	18,336		13,588
Amortized Cost Basis by Origination Year - Revolving	615		379
Total loans	893,023		903,458
Consumer portfolio loans | Construction and land development | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			2
Amortized Cost Basis by Origination Year - 2022	325
Amortized Cost Basis by Origination Year - 2020			57
Amortized Cost Basis by Origination Year - 2019			23
Amortized Cost Basis by Origination Year - Prior	279		43
Total loans	604		125
Consumer portfolio loans | Construction and land development | 60 days past due
Loans
Amortized Cost Basis by Origination Year - 2020	22
Amortized Cost Basis by Origination Year - Prior	92
Total loans	114
Consumer portfolio loans | Construction and land development | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2021			436
Amortized Cost Basis by Origination Year - 2020	1
Amortized Cost Basis by Origination Year - Prior			41
Total loans	1		477
Consumer portfolio loans | Other income producing property
Loans
Amortized Cost Basis by Origination Year - 2023	3,664		45,717
Amortized Cost Basis by Origination Year - 2022	45,269		21,421
Amortized Cost Basis by Origination Year - 2021	20,833		4,937
Amortized Cost Basis by Origination Year - 2020	4,812		2,663
Amortized Cost Basis by Origination Year - 2019	2,624		4,322
Amortized Cost Basis by Origination Year - Prior	43,652		40,886
Amortized Cost Basis by Origination Year - Revolving	604		624
Total loans	121,458		120,570
Consumer portfolio loans | Other income producing property | Current due
Loans
Amortized Cost Basis by Origination Year - 2023	3,664		45,717
Amortized Cost Basis by Origination Year - 2022	45,269		21,421
Amortized Cost Basis by Origination Year - 2021	20,833		4,937
Amortized Cost Basis by Origination Year - 2020	4,812		2,663
Amortized Cost Basis by Origination Year - 2019	2,624		4,322
Amortized Cost Basis by Origination Year - Prior	43,104		40,680
Amortized Cost Basis by Origination Year - Revolving	604		624
Total loans	120,910		120,364
Consumer portfolio loans | Other income producing property | 30 days past due
Loans
Amortized Cost Basis by Origination Year - Prior	292		62
Total loans	292		62
Consumer portfolio loans | Other income producing property | 60 days past due
Loans
Amortized Cost Basis by Origination Year - Prior			23
Total loans			23
Consumer portfolio loans | Other income producing property | 90 days past due
Loans
Amortized Cost Basis by Origination Year - Prior	256		121
Total loans	256		121
Consumer portfolio loans | Consumer Owner Occupied Loans
Loans
Amortized Cost Basis by Origination Year - 2023	240,632		1,697,025
Amortized Cost Basis by Origination Year - 2022	1,749,909		1,469,615
Amortized Cost Basis by Origination Year - 2021	1,588,097		660,041
Amortized Cost Basis by Origination Year - 2020	659,590		316,576
Amortized Cost Basis by Origination Year - 2019	310,973		188,758
Amortized Cost Basis by Origination Year - Prior	946,108		799,286
Total loans	5,495,309		5,131,301
Current-period gross charge-offs - 2023			25
Current-period gross charge-offs - 2020			6
Current-period gross charge-offs - 2019			23
Current-period gross charge-offs - Prior	2		66
Current-period gross charge-offs - Total	2		120
Consumer portfolio loans | Consumer Owner Occupied Loans | Current due
Loans
Amortized Cost Basis by Origination Year - 2023	240,632		1,695,454
Amortized Cost Basis by Origination Year - 2022	1,748,552		1,467,080
Amortized Cost Basis by Origination Year - 2021	1,587,281		657,005
Amortized Cost Basis by Origination Year - 2020	657,794		315,458
Amortized Cost Basis by Origination Year - 2019	309,618		187,580
Amortized Cost Basis by Origination Year - Prior	939,645		792,572
Total loans	5,483,522		5,115,149
Consumer portfolio loans | Consumer Owner Occupied Loans | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			1,316
Amortized Cost Basis by Origination Year - 2022	438		1,254
Amortized Cost Basis by Origination Year - 2021	451		1,681
Amortized Cost Basis by Origination Year - 2020	323		664
Amortized Cost Basis by Origination Year - 2019	672		272
Amortized Cost Basis by Origination Year - Prior	2,242		2,028
Total loans	4,126		7,215
Consumer portfolio loans | Consumer Owner Occupied Loans | 60 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			255
Amortized Cost Basis by Origination Year - 2022	243		337
Amortized Cost Basis by Origination Year - 2021	97		579
Amortized Cost Basis by Origination Year - 2020	620
Amortized Cost Basis by Origination Year - 2019			242
Amortized Cost Basis by Origination Year - Prior	746		1,650
Total loans	1,706		3,063
Consumer portfolio loans | Consumer Owner Occupied Loans | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2022	676		944
Amortized Cost Basis by Origination Year - 2021	268		776
Amortized Cost Basis by Origination Year - 2020	853		454
Amortized Cost Basis by Origination Year - 2019	683		664
Amortized Cost Basis by Origination Year - Prior	3,475		3,036
Total loans	5,955		5,874
Consumer portfolio loans | Home equity loans
Loans
Amortized Cost Basis by Origination Year - 2023	4,563		5,921
Amortized Cost Basis by Origination Year - 2022	7,416		5,231
Amortized Cost Basis by Origination Year - 2021	5,529		3,516
Amortized Cost Basis by Origination Year - 2020	3,754		1,760
Amortized Cost Basis by Origination Year - 2019	1,507		2,443
Amortized Cost Basis by Origination Year - Prior	19,118		19,000
Amortized Cost Basis by Origination Year - Revolving	1,290,398		1,275,297
Total loans	1,332,285		1,313,168
Current-period gross charge-offs - 2020	39		19
Current-period gross charge-offs - Prior			280
Current-period gross charge-offs - Revolving			146
Current-period gross charge-offs - Total	39		445
Consumer portfolio loans | Home equity loans | Current due
Loans
Amortized Cost Basis by Origination Year - 2023	4,563		5,921
Amortized Cost Basis by Origination Year - 2022	7,084		5,231
Amortized Cost Basis by Origination Year - 2021	5,367		3,282
Amortized Cost Basis by Origination Year - 2020	3,733		1,560
Amortized Cost Basis by Origination Year - 2019	1,141		1,955
Amortized Cost Basis by Origination Year - Prior	17,773		17,941
Amortized Cost Basis by Origination Year - Revolving	1,287,131		1,272,848
Total loans	1,326,792		1,308,738
Consumer portfolio loans | Home equity loans | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2022	273
Amortized Cost Basis by Origination Year - 2021			155
Amortized Cost Basis by Origination Year - 2020			77
Amortized Cost Basis by Origination Year - 2019	89		418
Amortized Cost Basis by Origination Year - Prior	1,003		422
Amortized Cost Basis by Origination Year - Revolving	2,424		1,586
Total loans	3,789		2,658
Consumer portfolio loans | Home equity loans | 60 days past due
Loans
Amortized Cost Basis by Origination Year - 2022	59
Amortized Cost Basis by Origination Year - 2021			19
Amortized Cost Basis by Origination Year - 2020			36
Amortized Cost Basis by Origination Year - 2019			70
Amortized Cost Basis by Origination Year - Prior	221		26
Amortized Cost Basis by Origination Year - Revolving	494		540
Total loans	774		691
Consumer portfolio loans | Home equity loans | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2021	162		60
Amortized Cost Basis by Origination Year - 2020	21		87
Amortized Cost Basis by Origination Year - 2019	277
Amortized Cost Basis by Origination Year - Prior	121		611
Amortized Cost Basis by Origination Year - Revolving	349		323
Total loans	930		1,081
Consumer portfolio loans | Consumer loans
Loans
Amortized Cost Basis by Origination Year - 2023	104,807		408,724
Amortized Cost Basis by Origination Year - 2022	384,604		206,360
Amortized Cost Basis by Origination Year - 2021	187,567		111,453
Amortized Cost Basis by Origination Year - 2020	100,789		86,284
Amortized Cost Basis by Origination Year - 2019	78,842		44,675
Amortized Cost Basis by Origination Year - Prior	176,477		144,525
Amortized Cost Basis by Origination Year - Revolving	244,463		276,405
Total loans	1,277,549		1,278,426
Current-period gross charge-offs - 2023	20		254
Current-period gross charge-offs - 2022	295		653
Current-period gross charge-offs - 2021	100		337
Current-period gross charge-offs - 2020	79		265
Current-period gross charge-offs - 2019	100		62
Current-period gross charge-offs - Prior	244		664
Current-period gross charge-offs - Revolving	1,891		7,979
Current-period gross charge-offs - Total	2,729		10,214
Consumer portfolio loans | Consumer loans | Current due
Loans
Amortized Cost Basis by Origination Year - 2023	104,807		407,825
Amortized Cost Basis by Origination Year - 2022	383,665		206,003
Amortized Cost Basis by Origination Year - 2021	187,023		111,210
Amortized Cost Basis by Origination Year - 2020	100,664		86,008
Amortized Cost Basis by Origination Year - 2019	78,646		44,303
Amortized Cost Basis by Origination Year - Prior	173,622		141,053
Amortized Cost Basis by Origination Year - Revolving	224,373		248,314
Total loans	1,252,800		1,244,716
Consumer portfolio loans | Consumer loans | 30 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			718
Amortized Cost Basis by Origination Year - 2022	252		194
Amortized Cost Basis by Origination Year - 2021	449		78
Amortized Cost Basis by Origination Year - 2020	37		174
Amortized Cost Basis by Origination Year - 2019	107		63
Amortized Cost Basis by Origination Year - Prior	1,213		1,255
Amortized Cost Basis by Origination Year - Revolving	11,052		17,471
Total loans	13,110		19,953
Consumer portfolio loans | Consumer loans | 60 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			55
Amortized Cost Basis by Origination Year - 2022	231		103
Amortized Cost Basis by Origination Year - 2021	19		107
Amortized Cost Basis by Origination Year - 2020	49		36
Amortized Cost Basis by Origination Year - 2019	55		144
Amortized Cost Basis by Origination Year - Prior	242		557
Amortized Cost Basis by Origination Year - Revolving	7,531		9,836
Total loans	8,127		10,838
Consumer portfolio loans | Consumer loans | 90 days past due
Loans
Amortized Cost Basis by Origination Year - 2023			126
Amortized Cost Basis by Origination Year - 2022	456		60
Amortized Cost Basis by Origination Year - 2021	76		58
Amortized Cost Basis by Origination Year - 2020	39		66
Amortized Cost Basis by Origination Year - 2019	34		165
Amortized Cost Basis by Origination Year - Prior	1,400		1,660
Amortized Cost Basis by Origination Year - Revolving	1,507		784
Total loans	$ 3,512		$ 2,919

Loans - Aging analysis of past

Loans - Aging analysis of past due loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Loans and Allowance for Loan Losses
Non-Accruing	$ 120,970	$ 104,225
Total loans	30,696,142	30,177,862
30 days past due
Loans and Allowance for Loan Losses
Total loans	51,733	68,416
60 days past due
Loans and Allowance for Loan Losses
Total loans	30,173	31,607
90 days past due
Loans and Allowance for Loan Losses
Total loans	3,650	4,350
Total Past Due
Loans and Allowance for Loan Losses
Total loans	85,556	104,373
Current
Loans and Allowance for Loan Losses
Total loans	30,489,616	29,969,264
Non-acquired loans
Loans and Allowance for Loan Losses
Total loans	23,750,452	22,805,039
Construction and land development
Loans and Allowance for Loan Losses
Non-Accruing	306	827
Total loans	2,749,290	2,860,360
Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	980	2,146
Construction and land development | 60 days past due
Loans and Allowance for Loan Losses
Total loans	4,050	3,653
Construction and land development | Total Past Due
Loans and Allowance for Loan Losses
Total loans	5,030	5,799
Construction and land development | Current
Loans and Allowance for Loan Losses
Total loans	2,743,954	2,853,734
Commercial non-owner occupied
Loans and Allowance for Loan Losses
Non-Accruing	21,758	20,425
Total loans	8,236,216	8,072,959
Commercial non-owner occupied | 30 days past due
Loans and Allowance for Loan Losses
Total loans	4,410	1,158
Commercial non-owner occupied | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,778	978
Commercial non-owner occupied | 90 days past due
Loans and Allowance for Loan Losses
Total loans		77
Commercial non-owner occupied | Total Past Due
Loans and Allowance for Loan Losses
Total loans	6,188	2,213
Commercial non-owner occupied | Current
Loans and Allowance for Loan Losses
Total loans	8,208,270	8,050,321
Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Non-Accruing	35,563	35,089
Total loans	5,522,514	5,460,193
Commercial owner occupied real estate loan | 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,841	10,748
Commercial owner occupied real estate loan | 60 days past due
Loans and Allowance for Loan Losses
Total loans	4,552	2,059
Commercial owner occupied real estate loan | 90 days past due
Loans and Allowance for Loan Losses
Total loans	1,665	2,231
Commercial owner occupied real estate loan | Total Past Due
Loans and Allowance for Loan Losses
Total loans	10,058	15,038
Commercial owner occupied real estate loan | Current
Loans and Allowance for Loan Losses
Total loans	5,476,893	5,410,066
Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Non-Accruing	19,381	17,307
Total loans	5,528,546	5,162,042
Consumer Owner Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,521	6,001
Consumer Owner Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,344	744
Consumer Owner Occupied Loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans		40
Consumer Owner Occupied Loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	3,865	6,785
Consumer Owner Occupied Loans | Current
Loans and Allowance for Loan Losses
Total loans	5,505,300	5,137,950
Home equity loans
Loans and Allowance for Loan Losses
Non-Accruing	5,736	6,316
Total loans	1,332,285	1,313,168
Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,811	2,527
Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	673	361
Home equity loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	3,484	2,888
Home equity loans | Current
Loans and Allowance for Loan Losses
Total loans	1,323,065	1,303,964
Commercial and industrial
Loans and Allowance for Loan Losses
Non-Accruing	29,953	17,129
Total loans	5,321,306	5,313,483
Commercial and industrial | 30 days past due
Loans and Allowance for Loan Losses
Total loans	21,931	24,500
Commercial and industrial | 60 days past due
Loans and Allowance for Loan Losses
Total loans	9,618	11,677
Commercial and industrial | 90 days past due
Loans and Allowance for Loan Losses
Total loans	1,837	1,704
Commercial and industrial | Total Past Due
Loans and Allowance for Loan Losses
Total loans	33,386	37,881
Commercial and industrial | Current
Loans and Allowance for Loan Losses
Total loans	5,257,967	5,258,473
Other income producing property
Loans and Allowance for Loan Losses
Non-Accruing	2,991	2,734
Total loans	721,291	696,242
Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	2,224	1,623
Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans	156	1,480
Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans	147	298
Other income producing property | Total Past Due
Loans and Allowance for Loan Losses
Total loans	2,527	3,401
Other income producing property | Current
Loans and Allowance for Loan Losses
Total loans	715,773	690,107
Consumer loans
Loans and Allowance for Loan Losses
Non-Accruing	5,282	4,398
Total loans	1,277,549	1,278,426
Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	13,015	19,713
Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	8,002	10,655
Consumer loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	1
Consumer loans | Total Past Due
Loans and Allowance for Loan Losses
Total loans	21,018	30,368
Consumer loans | Current
Loans and Allowance for Loan Losses
Total loans	1,251,249	1,243,660
Other loans
Loans and Allowance for Loan Losses
Total loans	7,145	20,989
Other loans | Current
Loans and Allowance for Loan Losses
Total loans	7,145	20,989
Commercial loans
Loans and Allowance for Loan Losses
Total loans	21,575,799	21,430,337
Commercial loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	1,855,548	1,956,300
Commercial loans | Commercial non-owner occupied
Loans and Allowance for Loan Losses
Total loans	8,236,216	8,072,959
Commercial loans | Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Total loans	5,522,514	5,460,193
Commercial loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans	33,237	30,741
Commercial loans | Commercial and industrial
Loans and Allowance for Loan Losses
Total loans	5,321,306	5,313,483
Commercial loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	599,833	575,672
Commercial loans | Other loans
Loans and Allowance for Loan Losses
Total loans	7,145	20,989
Consumer portfolio loans
Loans and Allowance for Loan Losses
Total loans	9,120,343	8,747,525
Consumer portfolio loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	21,921	30,013
Consumer portfolio loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	10,721	14,615
Consumer portfolio loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	10,654	10,472
Consumer portfolio loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans	893,742	904,060
Consumer portfolio loans | Construction and land development | 30 days past due
Loans and Allowance for Loan Losses
Total loans	604	125
Consumer portfolio loans | Construction and land development | 60 days past due
Loans and Allowance for Loan Losses
Total loans	114
Consumer portfolio loans | Construction and land development | 90 days past due
Loans and Allowance for Loan Losses
Total loans	1	477
Consumer portfolio loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans	5,495,309	5,131,301
Consumer portfolio loans | Consumer Owner Occupied Loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	4,126	7,215
Consumer portfolio loans | Consumer Owner Occupied Loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	1,706	3,063
Consumer portfolio loans | Consumer Owner Occupied Loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	5,955	5,874
Consumer portfolio loans | Home equity loans
Loans and Allowance for Loan Losses
Total loans	1,332,285	1,313,168
Consumer portfolio loans | Home equity loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	3,789	2,658
Consumer portfolio loans | Home equity loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	774	691
Consumer portfolio loans | Home equity loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	930	1,081
Consumer portfolio loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans	121,458	120,570
Consumer portfolio loans | Other income producing property | 30 days past due
Loans and Allowance for Loan Losses
Total loans	292	62
Consumer portfolio loans | Other income producing property | 60 days past due
Loans and Allowance for Loan Losses
Total loans		23
Consumer portfolio loans | Other income producing property | 90 days past due
Loans and Allowance for Loan Losses
Total loans	256	121
Consumer portfolio loans | Consumer loans
Loans and Allowance for Loan Losses
Total loans	1,277,549	1,278,426
Consumer portfolio loans | Consumer loans | 30 days past due
Loans and Allowance for Loan Losses
Total loans	13,110	19,953
Consumer portfolio loans | Consumer loans | 60 days past due
Loans and Allowance for Loan Losses
Total loans	8,127	10,838
Consumer portfolio loans | Consumer loans | 90 days past due
Loans and Allowance for Loan Losses
Total loans	$ 3,512	$ 2,919

Loans - Nonaccrual loans (Detai

Loans - Nonaccrual loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	$ 120,970	$ 104,225
Greater than 90 Days Accruing	3,650
Non-accrual with no allowance	34,126
Commercial loans | Construction and land development
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	306	827
Non-accrual with no allowance	8
Commercial loans | Commercial non-owner occupied
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	21,758	20,425
Non-accrual with no allowance	11,338
Commercial loans | Commercial owner occupied real estate loan
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	35,563	35,089
Greater than 90 Days Accruing	1,665
Non-accrual with no allowance	15,034
Commercial loans | Commercial and industrial
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	29,953	17,129
Greater than 90 Days Accruing	1,837
Non-accrual with no allowance	6,252
Commercial loans | Other income producing property
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	2,991	2,734
Greater than 90 Days Accruing	147
Consumer portfolio loans | Consumer Owner Occupied Loans
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	19,381	17,307
Non-accrual with no allowance	5
Consumer portfolio loans | Home equity loans
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	5,736	6,316
Non-accrual with no allowance	1,489
Consumer portfolio loans | Consumer loans
Loans and Allowance for Loan Losses
Total loans on nonaccrual status	5,282	$ 4,398
Greater than 90 Days Accruing	$ 1

Loans - Collateral Dependent Lo

Loans - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2020
Loans and Allowance for Loan Losses
Loans individually evaluated for impairment			$ 1,000
Financing Receivable, Threshold Loss on Modifications Estimated	$ 1,000
Increase in overall collateral dependent loans	$ (18,900)
Number of months generally required to return to accruing status	6 months
Commercial non-owner occupied
Loans and Allowance for Loan Losses
Collateral dependent loans	$ 46,289	$ 27,419
Collateral Coverage	91,662	57,062
Commercial non-owner occupied | Other
Loans and Allowance for Loan Losses
Collateral dependent loans	11,338	6,450
Collateral Coverage	$ 31,860	$ 10,900
Collateral Coverage (as a percent)	281%	169%
Commercial owner occupied real estate loan | Other
Loans and Allowance for Loan Losses
Collateral dependent loans	$ 6,868	$ 14,638
Collateral Coverage	$ 17,012	$ 38,900
Collateral Coverage (as a percent)	248%	266%
Commercial owner occupied real estate loan | Industrial
Loans and Allowance for Loan Losses
Collateral dependent loans	$ 8,166
Collateral Coverage	$ 9,344
Collateral Coverage (as a percent)	114%
Commercial and industrial | Other
Loans and Allowance for Loan Losses
Collateral dependent loans	$ 18,428	$ 4,808
Collateral Coverage	$ 30,586	$ 5,591
Collateral Coverage (as a percent)	166%	116%
Home equity loans | Residential 1-4 family dwelling
Loans and Allowance for Loan Losses
Collateral dependent loans	$ 1,489	$ 1,523
Collateral Coverage	$ 2,860	$ 1,671
Collateral Coverage (as a percent)	192%	110%

Loans - Loans Designated as Mod

Loans - Loans Designated as Modifications (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accrued interest receivable	$ 12
Term extension
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost	3,792
Commercial loans | Construction and land development | Term extension
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost	$ 260
% of Total Asset Class	0.04%
Increase in Weighted Average Life of Loan	12 months
Commercial loans | Commercial owner occupied real estate loan | Term extension
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost	$ 2,105
% of Total Asset Class	0.02%
Increase in Weighted Average Life of Loan	8 months
Commercial loans | Commercial and industrial | Term extension
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost	$ 1,145
% of Total Asset Class	0.02%
Increase in Weighted Average Life of Loan	10 months
Consumer portfolio loans | Consumer loans | Term extension
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost	$ 282
% of Total Asset Class	0.02%
Increase in Weighted Average Life of Loan	6 months

Loans - Loans Designated as TDR

Loans - Loans Designated as TDRs (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) loan	Mar. 31, 2023 USD ($)
Allowance for Credit Losses
Number of loans | loan	14
Pre-Modification Amortized Cost	$ 3,787,000
Post-Modification Amortized Cost	3,787,000
Balance of accruing TDRs	12,400,000
Remaining availability under commitments to lend additional funds on restructured loans	768,000	$ 3,400,000
Specific reserve associated with restructured loans that subsequently defaulted	$ 4,200,000
Interest rate modification
Allowance for Credit Losses
Number of loans | loan	11
Pre-Modification Amortized Cost	$ 1,290,000
Post-Modification Amortized Cost	$ 1,290,000
Term modification
Allowance for Credit Losses
Number of loans | loan	3
Pre-Modification Amortized Cost	$ 2,497,000
Post-Modification Amortized Cost	$ 2,497,000
Construction and land development | Interest rate modification
Allowance for Credit Losses
Number of loans | loan	1
Pre-Modification Amortized Cost	$ 120,000
Post-Modification Amortized Cost	$ 120,000
Construction and land development | Term modification
Allowance for Credit Losses
Number of loans | loan	1
Pre-Modification Amortized Cost	$ 141,000
Post-Modification Amortized Cost	$ 141,000
Commercial non-owner occupied | Interest rate modification
Allowance for Credit Losses
Number of loans | loan	1
Pre-Modification Amortized Cost	$ 187,000
Post-Modification Amortized Cost	$ 187,000
Commercial non-owner occupied | Term modification
Allowance for Credit Losses
Number of loans | loan	2
Pre-Modification Amortized Cost	$ 2,356,000
Post-Modification Amortized Cost	$ 2,356,000
Commercial owner occupied real estate loan | Interest rate modification
Allowance for Credit Losses
Number of loans | loan	2
Pre-Modification Amortized Cost	$ 268,000
Post-Modification Amortized Cost	$ 268,000
Consumer Owner Occupied Loans | Interest rate modification
Allowance for Credit Losses
Number of loans | loan	1
Pre-Modification Amortized Cost	$ 99,000
Post-Modification Amortized Cost	$ 99,000
Commercial and industrial | Interest rate modification
Allowance for Credit Losses
Number of loans | loan	4
Pre-Modification Amortized Cost	$ 497,000
Post-Modification Amortized Cost	$ 497,000
Other income producing property | Interest rate modification
Allowance for Credit Losses
Number of loans | loan	2
Pre-Modification Amortized Cost	$ 119,000
Post-Modification Amortized Cost	$ 119,000

Loans - Changes in Status of Lo

Loans - Changes in Status of Loans (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($) loan
Allowance for Credit Losses
Paying Under Restructured Terms - Number of Loans | loan		18
Paying Under Restructured Terms - Amortized Cost		$ 4,589
Interest rate reduction
Allowance for Credit Losses
Paying Under Restructured Terms - Number of Loans | loan		14
Paying Under Restructured Terms - Amortized Cost		$ 1,783
Term extension
Allowance for Credit Losses
Paying Under Restructured Terms - Number of Loans | loan		4
Paying Under Restructured Terms - Amortized Cost	$ 3,792	$ 2,806
Term extension | Consumer portfolio loans | Construction and land development
Allowance for Credit Losses
Paying Under Restructured Terms - Amortized Cost	260
Term extension | Consumer portfolio loans | Commercial owner occupied real estate loan
Allowance for Credit Losses
Paying Under Restructured Terms - Amortized Cost	2,105
Term extension | Consumer portfolio loans | Consumer Owner Occupied Loans
Allowance for Credit Losses
Paying Under Restructured Terms - Amortized Cost	282
Term extension | Consumer portfolio loans | Commercial and industrial
Allowance for Credit Losses
Paying Under Restructured Terms - Amortized Cost	$ 1,145

Loans - Performance of Loans Mo

Loans - Performance of Loans Modified (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost Basis		$ 4,589
Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost Basis	$ 3,792
Commercial loans | Construction and land development | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost Basis	260
Commercial loans | Commercial owner occupied real estate loan | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost Basis	2,105
Commercial loans | Commercial and industrial | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost Basis	1,145
Consumer portfolio loans | Consumer Owner Occupied Loans | Total Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Amortized Cost Basis	$ 282

Allowance for Credit Losses (_3

Allowance for Credit Losses (ACL) - Disaggregated analysis of the changes in allowance for credit losses (Details) - USD ($)		3 Months Ended		12 Months Ended
	Mar. 01, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Allowance for credit losses
Balance at beginning of period		$ 356,444,000	$ 301,807,000	$ 301,807,000
Charge-offs		(4,627,000)	(5,490,000)	(23,446,000)
Recoveries		3,589,000	3,167,000
Net (charge-offs) recoveries		(1,038,000)	(2,323,000)
Provision (recovery)		15,239,000	(22,003,000)
Balance at end of period		370,645,000	300,396,000	356,444,000
Quantitative allowance
Collectively evaluated		341,504,000	288,316,000
Individually evaluated		16,782,000	8,431,000
Total quantitative allowance		358,286,000	296,747,000
Qualitative allowance		12,359,000	3,649,000
Unfunded Commitment
Allowance for credit losses
Provision (recovery)		17,900,000	(142,000)
Initial PCD Allowance
Allowance for credit losses
Balance at end of period			9,218,000
Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			13,697,000
Residential Mortgage Sr.
Allowance for credit losses
Balance at beginning of period		72,188,000	47,036,000	47,036,000
Charge-offs		(2,000)	(58,000)
Recoveries		294,000	394,000
Net (charge-offs) recoveries		292,000	336,000
Provision (recovery)		4,871,000	(1,806,000)
Balance at end of period		77,351,000	46,002,000	72,188,000
Quantitative allowance
Collectively evaluated		77,982,000	45,805,000
Individually evaluated		197,000	168,000
Total quantitative allowance		78,179,000	45,973,000
Qualitative allowance		(828,000)	29,000
Residential Mortgage Sr. | Initial PCD Allowance
Allowance for credit losses
Balance at end of period			84,000
Residential Mortgage Sr. | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			352,000
Residential Mortgage Jr.
Allowance for credit losses
Balance at beginning of period		405,000	611,000	611,000
Charge-offs			(19,000)
Recoveries		5,000	55,000
Net (charge-offs) recoveries		5,000	36,000
Provision (recovery)		(61,000)	(87,000)
Balance at end of period		349,000	586,000	405,000
Quantitative allowance
Collectively evaluated		350,000	586,000
Total quantitative allowance		350,000	586,000
Qualitative allowance		(1,000)
Residential Mortgage Jr. | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			26,000
HELOC
Allowance for credit losses
Balance at beginning of period		14,886,000	13,325,000	13,325,000
Charge-offs		(39,000)	(218,000)
Recoveries		245,000	257,000
Net (charge-offs) recoveries		206,000	39,000
Provision (recovery)		(774,000)	175,000
Balance at end of period		14,318,000	13,671,000	14,886,000
Quantitative allowance
Collectively evaluated		12,229,000	12,301,000
Individually evaluated		2,285,000	1,357,000
Total quantitative allowance		14,514,000	13,658,000
Qualitative allowance		(196,000)	13,000
HELOC | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			132,000
Residential Construction
Allowance for credit losses
Balance at beginning of period		8,974,000	4,997,000	4,997,000
Recoveries		72,000	3,000
Net (charge-offs) recoveries		72,000	3,000
Provision (recovery)		130,000	614,000
Balance at end of period		9,176,000	5,616,000	8,974,000
Quantitative allowance
Collectively evaluated		8,994,000	5,616,000
Total quantitative allowance		8,994,000	5,616,000
Qualitative allowance		182,000
Residential Construction | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			2,000
Other C&D
Allowance for credit losses
Balance at beginning of period		45,410,000	37,593,000	37,593,000
Charge-offs			(4,000)
Recoveries		258,000	234,000
Net (charge-offs) recoveries		258,000	230,000
Provision (recovery)		9,401,000	(14,438,000)
Balance at end of period		55,069,000	25,358,000	45,410,000
Quantitative allowance
Collectively evaluated		49,865,000	24,770,000
Individually evaluated		155,000	588,000
Total quantitative allowance		50,020,000	25,358,000
Qualitative allowance		5,049,000
Other C&D | Initial PCD Allowance
Allowance for credit losses
Balance at end of period			86,000
Other C&D | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			1,887,000
Consumer
Allowance for credit losses
Balance at beginning of period		22,767,000	23,149,000	23,149,000
Charge-offs		(2,729,000)	(2,661,000)
Recoveries		584,000	532,000
Net (charge-offs) recoveries		(2,145,000)	(2,129,000)
Provision (recovery)		2,697,000	828,000
Balance at end of period		23,319,000	21,899,000	22,767,000
Quantitative allowance
Collectively evaluated		23,319,000	21,899,000
Total quantitative allowance		23,319,000	21,899,000
Consumer | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			51,000
Multifamily
Allowance for credit losses
Balance at beginning of period		3,684,000	4,921,000	4,921,000
Provision (recovery)		1,823,000	(1,444,000)
Balance at end of period		5,507,000	3,903,000	3,684,000
Quantitative allowance
Collectively evaluated		5,369,000	3,903,000
Total quantitative allowance		5,369,000	3,903,000
Qualitative allowance		138,000
Multifamily | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			426,000
Municipal
Allowance for credit losses
Balance at beginning of period		849,000	565,000	565,000
Provision (recovery)		30,000	42,000
Balance at end of period		879,000	607,000	849,000
Quantitative allowance
Collectively evaluated		731,000	607,000
Total quantitative allowance		731,000	607,000
Qualitative allowance		148,000
CRE Owner Occupied
Allowance for credit losses
Balance at beginning of period		58,083,000	61,794,000	61,794,000
Charge-offs			(371,000)
Recoveries		293,000	314,000
Net (charge-offs) recoveries		293,000	(57,000)
Provision (recovery)		(835,000)	(16,641,000)
Balance at end of period		57,541,000	49,094,000	58,083,000
Quantitative allowance
Collectively evaluated		49,297,000	45,302,000
Individually evaluated		6,812,000	2,960,000
Total quantitative allowance		56,109,000	48,262,000
Qualitative allowance		1,432,000	832,000
CRE Owner Occupied | Initial PCD Allowance
Allowance for credit losses
Balance at end of period			1,479,000
CRE Owner Occupied | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			2,519,000
Non Owner Occupied CRE
Allowance for credit losses
Balance at beginning of period		78,485,000	79,649,000	79,649,000
Charge-offs		(51,000)
Recoveries		106,000	69,000
Net (charge-offs) recoveries		55,000	69,000
Provision (recovery)		3,933,000	13,945,000
Balance at end of period		82,473,000	96,360,000	78,485,000
Quantitative allowance
Collectively evaluated		78,013,000	95,051,000
Individually evaluated		2,721,000
Total quantitative allowance		80,734,000	95,051,000
Qualitative allowance		1,739,000	1,309,000
Non Owner Occupied CRE | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			2,697,000
C & I
Allowance for credit losses
Balance at beginning of period		50,713,000	28,167,000	28,167,000
Charge-offs		(1,806,000)	(2,159,000)
Recoveries		1,732,000	1,309,000
Net (charge-offs) recoveries		(74,000)	(850,000)
Provision (recovery)		(5,976,000)	(3,191,000)
Balance at end of period		44,663,000	37,300,000	$ 50,713,000
Quantitative allowance
Collectively evaluated		35,355,000	32,476,000
Individually evaluated		4,612,000	3,358,000
Total quantitative allowance		39,967,000	35,834,000
Qualitative allowance		$ 4,696,000	1,466,000
C & I | Initial PCD Allowance
Allowance for credit losses
Balance at end of period			7,569,000
C & I | Initial Non PCD Allowance
Allowance for credit losses
Balance at end of period			5,605,000
Atlantic Capital
Allowance for credit losses
Charge-offs	$ (22,100,000)
Atlantic Capital | Unfunded Commitment
Allowance for credit losses
Provision (recovery)			$ 3,400,000

Other Real Estate Owned and B_3

Other Real Estate Owned and Bank Properties Held for Sale (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) property	Dec. 31, 2022 property
OREO and Bank Premises
Balance at the beginning of the period	$ 18,777
Additions, net	2,826
Write-downs	(409)
Sold	(997)
Balance at the end of the period	$ 20,197
Number of properties held | property	6	6
Number of properties premises held for sale | property	16	17
Residential real estate consumer mortgage loans in foreclosure, carrying value	$ 3,000
OREO.
OREO and Bank Premises
Balance at the beginning of the period	1,023
Additions, net	2,826
Sold	(376)
Balance at the end of the period	3,473
Bank Premises Held for Sale
OREO and Bank Premises
Balance at the beginning of the period	17,754
Write-downs	(409)
Sold	(621)
Balance at the end of the period	$ 16,724

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Right to use asset	$ 104,700	$ 108,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Lease Liability	$ 112,409	$ 115,600
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities.	Other Liabilities.
Existence of option to extend	true
Lessee, Operating Leases Liability Not Yet Commenced	$ 0
Maximum
Lessee, Lease, Description [Line Items]
Renewal term	21 years

Leases - Lease cost and other i

Leases - Lease cost and other information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Lease Cost Components:
Amortization of ROU assets - finance leases	$ 117	$ 117
Interest on lease liabilities - finance leases	11	13
Operating lease cost (cost resulting from lease payments)	4,240	4,333
Short-term lease cost	109	143
Variable lease cost (cost excluded from lease payments)	634	437
Total lease cost	5,111	5,043
Supplemental Cash Flow and Other Information Related to Leases:
Finance lease - operating cash flows	11	13
Finance lease - financing cash flows	110	108
Operating lease - operating cash flows (fixed payments)	4,097	4,181
Operating lease - operating cash flows (net change asset/liability)	$ (3,287)	(3,303)
New ROU assets - operating leases		$ 12,428
Weighted - average remaining lease term (years) - finance leases	5 years 2 months 4 days	6 years 2 months 1 day
Weighted - average remaining lease term (years) - operating leases	9 years 10 months 17 days	10 years 5 months 19 days
Weighted - average discount rate - finance leases	1.70%	1.70%
Weighted - average discount rate - operating leases	3%	3%
Maturity Analysis of Lease Liabilities:
2023 (excluding the quarter ended March 31, 2023)	$ 12,226
2024	15,011
2025	13,548
2026	13,135
2027	12,172
Thereafter	66,550
Total undiscounted cash flows	132,642
Discount on cash flows	(20,233)
Total operating lease liabilities	$ 112,409		$ 115,600
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities.		Other Liabilities.

Deposits - Total deposits (Deta

Deposits - Total deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Deposits
Non-interest bearing checking	$ 12,422,583	$ 13,168,656
Interest-bearing checking	8,316,023	8,955,519
Savings	3,156,214	3,464,351
Money market	8,388,275	8,342,111
Time deposits	4,118,497	2,419,986
Total deposits	$ 36,401,592	$ 36,350,623

Deposits - Certificates of depo

Deposits - Certificates of deposits and Scheduled maturities of time deposits (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Deposits
Aggregate amounts of certificates of deposits in denominations of $250,000 or more	$ 658.5	$ 464.9
Traditional, out-of-market brokered deposits	$ 1,400	$ 150

Retirement Plans - Safe Harbor

Retirement Plans - Safe Harbor plan (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Employees' savings plan
Matching contribution by the company (as a percent)	100%
Employee savings plan/ 401(k)	$ 4.5	$ 4
Minimum
Employees' savings plan
Age of employees to be eligible to participate in the defined contribution plan	21 years
Percentage of annual base compensation that participants may elect to contribute	1%
Maximum
Employees' savings plan
Percentage of annual base compensation that participants may elect to contribute	50%
Percentage of employees salary for which the company contributes a matching contribution	4%

Earnings Per Share - Computatio

Earnings Per Share - Computation of basic and diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Basic earnings per common share:
Net income	$ 139,926	$ 100,329
Weighted-average basic common shares	75,902	71,447
Basic earnings per common share (in dollars per share)	$ 1.84	$ 1.40
Diluted earnings per common share:
Net income	$ 139,926	$ 100,329
Weighted-average basic common shares	75,902	71,447
Effect of dilutive securities (in shares)	487	664
Weighted-average dilutive shares	76,389	72,111
Diluted earnings per common share (in dollars per share)	$ 1.83	$ 1.39

Earnings Per Share - Calculatio

Earnings Per Share - Calculation of diluted EPS under Treasury method (Details) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share
Number of shares	57,169	57,169
Range of exercise prices, low end of range (in dollars per share)	$ 87.30	$ 87.30
Range of exercise prices, high end of range (in dollars per share)	$ 91.35	$ 91.35

Share-Based Compensation - Stoc

Share-Based Compensation - Stock Options (Details) - USD ($)	3 Months Ended	192 Months Ended
	Mar. 31, 2023	Dec. 31, 2019
Additional disclosures
Intrinsic value of stock option shares exercised	$ 510,000
2004 plan
Additional disclosures
Granted (in shares)		0
2020 plan
Share-Based Compensation
Number of shares registered	2,072,245
Stock Options
Number of shares
Outstanding at the beginning of the period (in shares)	161,832
Exercised (in shares)	(19,011)
Expired (in shares)	(929)
Outstanding at the end of the period (in shares)	141,892
Exercisable at the end of the period (in shares)	141,892
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 66.20
Exercised (in dollars per share)	51.01
Expired (in dollars per share)	33.09
Outstanding at the end of the period (in dollars per share)	68.45
Exercisable at the end of the period (in dollars per share)	$ 68.45
Weighted-Average Remaining Contractual Life
Outstanding at the end of the period	3 years 10 days
Exercisable at the end of the period	3 years 10 days
Aggregate Intrinsic Value
Outstanding at the end of the period	$ 1,534,000
Exercisable at the end of the period	$ 1,534,000
Additional disclosures
Granted (in shares)	0
Total unrecognized compensation cost related to non vested stock option grants	$ 0
Incentive stock options | Maximum
Share-Based Compensation
Vesting period	4 years
Incentive stock options | Plan 2004 and 2012
Share-Based Compensation
Vesting percentage	25%
Expiration period	10 years

Share-Based Compensation - Rest

Share-Based Compensation - Restricted Stock (Details) - Restricted Stock $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares
Restricted Stock Activity
Outstanding at the beginning of the period (in shares) | shares	50,506
Vested (in shares) | shares	(18,380)
Forfeited (in shares) | shares	(2,233)
Outstanding at the end of the period (in shares) | shares	29,893
Weighted-Average Grant-Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 89.12
Vested (in dollars per share) | $ / shares	90
Forfeited (in dollars per share) | $ / shares	90
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 88.51
Additional disclosures
Total unrecognized compensation cost related to nonvested restricted stock and RSUs granted | $	$ 1.8
Weighted-average period over which unrecognized compensation cost is expected to be recognized	1 year 1 month 9 days
Total fair value of shares vested during the period | $	$ 1.5
Minimum
Additional disclosures
Vesting period	2 years
Maximum
Additional disclosures
Vesting period	4 years

Share-Based Compensation - Re_2

Share-Based Compensation - Restricted Stock Units (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares
Restricted Stock Units
RSU Activity
Outstanding at the beginning of the period (in shares)	940,512
Granted (in shares)	328,343
Vested (in shares)	(177,708)
Forfeited (in shares)	(3,604)
Outstanding at the end of the period (in shares)	1,087,543
Weighted-Average Grant-Date Fair Value
Outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 73.82
Granted (in dollars per share) | $ / shares	76.05
Vested (in dollars per share) | $ / shares	86.81
Forfeited (in dollars per share) | $ / shares	75.92
Outstanding at the end of the period (in dollars per share) | $ / shares	$ 72.37
Additional disclosures
Options vested (in shares)	89,682
Total unrecognized compensation cost related to nonvested restricted stock and RSUs granted | $	$ 39.2
Weighted-average period over which unrecognized compensation cost is expected to be recognized	1 year 2 months 19 days
Total fair value of shares vested during the period | $	$ 15.4
Restricted Stock Units | Maximum
Additional disclosures
Vesting period	12 months
Performance based restricted stock units
Additional disclosures
Performance period	3 years
Other Performance based restricted stock units | Minimum
Additional disclosures
Performance period	1 year
Other Performance based restricted stock units | Maximum
Additional disclosures
Performance period	2 years
Timed based restricted stock units | Minimum
Additional disclosures
Performance period	2 years
Timed based restricted stock units | Maximum
Additional disclosures
Performance period	4 years
2021 and 2022 LTI performance-based RSU grants | Restricted Stock Units
Additional disclosures
Additional shares authorized	147,601
Vesting period	3 years

Commitments and Contingent Li_2

Commitments and Contingent Liabilities (Details) $ in Millions	Mar. 31, 2023 USD ($)
Commitments and Contingent Liabilities
Commitments to extend credit and standby letters of credit	$ 11,400
Liability recorded for expected credit losses on unfunded commitments	$ 85.1

Fair Value - Assets and liabili

Fair Value - Assets and liabilities measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Fair Value
Percentage of loans individually evaluated based on fair value of collateral	66.67%
Assets
Trading securities	$ 16,039	$ 31,263
Securities available for sale	5,159,999	5,326,822
SBA servicing asset	6,500	6,100
U.S. Treasuries
Assets
Securities available for sale	268,096	265,638
U.S. Government agencies
Assets
Trading securities	3,925	11,190
Securities available for sale	220,259	219,088
Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Assets
Trading securities	3,439
Securities available for sale	1,673,162	1,698,353
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Assets
Trading securities	1,304	4,589
Securities available for sale	987,437	1,000,398
State and municipal obligations
Assets
Trading securities	7,122	13,993
Securities available for sale	966,957	1,064,852
Corporate securities.
Assets
Securities available for sale	27,184	32,638
Significant Other Observable Inputs (Level 2)
Assets
Loans held for sale	27,289	28,968
Trading securities	16,039	31,263
Significant Unobservable Inputs (Level 3)
Assets
Mortgage servicing rights	85,406	86,610
SBA servicing asset	6,521	6,068
Changes in fair value of assets
Changes in hierarchy classifications of Level 3 assets	0
Changes in hierarchy classifications of Level 3 liabilities	0
Recurring basis
Assets
Derivative financial instruments	159,287	211,016
Loans held for sale	27,289	28,968
Trading securities	16,039	31,263
Securities available for sale	5,159,999	5,326,822
Mortgage servicing rights	85,406	86,610
SBA servicing asset	6,521	6,068
Fair value of Assets, Total	5,454,541	5,690,747
Liabilities
Derivative financial instruments	806,584	1,034,143
Recurring basis | U.S. Treasuries
Assets
Securities available for sale	268,096	265,638
Recurring basis | U.S. Government agencies
Assets
Securities available for sale	220,259	219,088
Recurring basis | Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Assets
Securities available for sale	1,673,162	1,698,353
Recurring basis | Residential Collateralized Mortgage-Obligations Issued By U.S. Government Agencies Or Sponsored Enterprises [Member]
Assets
Securities available for sale	591,412	601,045
Recurring basis | Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Assets
Securities available for sale	987,437	1,000,398
Recurring basis | State and municipal obligations
Assets
Securities available for sale	966,957	1,064,852
Recurring basis | Mortgage-backed securities
Assets
Securities available for sale	425,492	444,810
Recurring basis | Corporate securities.
Assets
Securities available for sale	27,184	32,638
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets
Derivative financial instruments	159,287	211,016
Loans held for sale	27,289	28,968
Trading securities	16,039	31,263
Securities available for sale	5,159,999	5,326,822
Fair value of Assets, Total	5,362,614	5,598,069
Liabilities
Derivative financial instruments	806,584	1,034,143
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. Treasuries
Assets
Securities available for sale	268,096	265,638
Recurring basis | Significant Other Observable Inputs (Level 2) | U.S. Government agencies
Assets
Securities available for sale	220,259	219,088
Recurring basis | Significant Other Observable Inputs (Level 2) | Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Assets
Securities available for sale	1,673,162	1,698,353
Recurring basis | Significant Other Observable Inputs (Level 2) | Residential Collateralized Mortgage-Obligations Issued By U.S. Government Agencies Or Sponsored Enterprises [Member]
Assets
Securities available for sale	591,412	601,045
Recurring basis | Significant Other Observable Inputs (Level 2) | Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Assets
Securities available for sale	987,437	1,000,398
Recurring basis | Significant Other Observable Inputs (Level 2) | State and municipal obligations
Assets
Securities available for sale	966,957	1,064,852
Recurring basis | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities
Assets
Securities available for sale	425,492	444,810
Recurring basis | Significant Other Observable Inputs (Level 2) | Corporate securities.
Assets
Securities available for sale	27,184	32,638
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets
Mortgage servicing rights	85,406	86,610
SBA servicing asset	6,521	6,068
Fair value of Assets, Total	$ 91,927	$ 92,678
Changes in fair value of assets
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Revenue from Contract with Customer, Excluding Assessed Tax
Unrealized losses included in accumulated other comprehensive (loss) income related to Level 3 financial assets and liabilities	$ 0
Recurring basis | Significant Unobservable Inputs (Level 3) | Mortgage Servicing Rights
Changes in fair value of assets
Fair value of assets at the beginning of the period	86,610
Servicing assets that resulted from transfers of financial assets	1,494
Changes in fair value assets due to valuation inputs or assumptions	(1,289)
Changes in fair value due to decay	(1,409)
Fair value of assets at the end of the period	85,406
Recurring basis | Significant Unobservable Inputs (Level 3) | SBA servicing asset
Changes in fair value of assets
Fair value of assets at the beginning of the period	6,068
Servicing assets that resulted from transfers of financial assets	334
Changes in fair value assets due to valuation inputs or assumptions	$ 355
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Revenue from Contract with Customer, Excluding Assessed Tax
Changes in fair value due to decay	$ (236)
Fair value of assets at the end of the period	$ 6,521

Fair Value - Assets and liabi_2

Fair Value - Assets and liabilities measured at fair value on a nonrecurring basis (Details) $ in Thousands	Mar. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($) item
Fair Value
OREO	$ 3,473	$ 1,023
Individually evaluated loans	120,970	104,225
Nonrecurring basis | OREO | Fair Value
Fair Value
OREO	3,473	1,023
Nonrecurring basis | Bank properties held for sale | Fair Value
Fair Value
Bank properties held for sale	16,724	17,754
Nonrecurring basis | Non-acquired impaired loans | Fair Value
Fair Value
Individually evaluated loans	$ 28,650	$ 20,802
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | Impaired loans
Quantitative Information about Level 3 Fair Value Measurements
Long-term Debt, Valuation Technique [Extensible List]	us-gaap:MarketApproachValuationTechniqueMember, us-gaap:ValuationTechniqueDiscountedCashFlowMember	us-gaap:MarketApproachValuationTechniqueMember, us-gaap:ValuationTechniqueDiscountedCashFlowMember
Long-term Debt, Measurement Input [Extensible List]	us-gaap:MeasurementInputDiscountRateMember	us-gaap:MeasurementInputDiscountRateMember
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | Impaired loans | Weighted average
Quantitative Information about Level 3 Fair Value Measurements
Discount rate (as a percent) | item	0.24	0.31
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | OREO
Fair Value
OREO	$ 3,473	$ 1,023
Quantitative Information about Level 3 Fair Value Measurements
Long-term Debt, Valuation Technique [Extensible List]	us-gaap:MarketApproachValuationTechniqueMember	us-gaap:MarketApproachValuationTechniqueMember
Long-term Debt, Measurement Input [Extensible List]	us-gaap:MeasurementInputCostToSellMember, us-gaap:MeasurementInputDiscountRateMember	us-gaap:MeasurementInputCostToSellMember, us-gaap:MeasurementInputDiscountRateMember
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | OREO | Weighted average
Quantitative Information about Level 3 Fair Value Measurements
Discount rate (as a percent) | item	0.15	0.16
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | Bank properties held for sale
Fair Value
Bank properties held for sale	$ 16,724	$ 17,754
Nonrecurring basis | Significant Unobservable Inputs (Level 3) | Non-acquired impaired loans
Fair Value
Individually evaluated loans	$ 28,650	$ 20,802

Fair Value - Estimated fair val

Fair Value - Estimated fair value and related carrying amount, of the Company's financial instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Financial assets:
Trading securities	$ 16,039		$ 31,263
SBA servicing asset	6,500		6,100
Financial liabilities:
Other borrowings	900,000
Other derivative financial instruments (mortgage banking related)	(227,559)	$ 119,608
Carrying Amount
Financial assets:
Cash and cash equivalents	1,996,662		1,312,563
Trading securities	16,039		31,263
Investment securities	8,014,663		8,189,780
Loans held for sale	27,289		28,968
Loans, net of allowance for credit losses	30,325,497		29,821,418
Accrued interest receivable	138,515		134,594
Mortgage servicing rights	85,406		86,610
SBA servicing asset	6,521		6,068
Interest rate swap - non-designated hedge	157,014		210,216
Other derivative financial instruments (mortgage banking related)	$ 2,273		$ 800
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Derivative Asset, Noncurrent		Derivative Asset, Noncurrent
Financial liabilities:
Deposits	$ 36,401,592		$ 36,350,623
Federal funds purchased and securities sold under agreements to repurchase	544,108		556,417
Corporate and subordinated debentures	392,182		392,275
Other borrowings	900,000
Accrued interest payable	20,411		6,218
Interest rate swap - non-designated hedge	806,584		1,033,980
Other derivative financial instruments (mortgage banking related)			163
Fair Value
Financial assets:
Cash and cash equivalents	1,996,662		1,312,563
Trading securities	16,039		31,263
Investment securities	7,567,328		7,756,707
Loans held for sale	27,289		28,968
Loans, net of allowance for credit losses	29,646,800		29,329,499
Accrued interest receivable	138,515		134,594
Mortgage servicing rights	85,406		86,610
Interest rate swap - non-designated hedge	157,014		210,216
Other derivative financial instruments (mortgage banking related)	$ 2,273		$ 800
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Derivative Asset, Noncurrent		Derivative Asset, Noncurrent
Financial liabilities:
Deposits	$ 36,333,275		$ 36,264,401
Federal funds purchased and securities sold under agreements to repurchase	556,417		556,417
Corporate and subordinated debentures	380,925		377,360
Other borrowings	900,000
Accrued interest payable	20,411		6,218
Interest rate swap - non-designated hedge	806,584		1,033,980
Other derivative financial instruments (mortgage banking related)			163
Commitments to extend credit | Fair Value
Financial liabilities:
Commitments to extend credit	(255,022)		(184,801)
Quoted Prices In Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	1,996,662		1,312,563
Investment securities	179,717		179,717
Significant Other Observable Inputs (Level 2)
Financial assets:
Trading securities	16,039		31,263
Investment securities	7,387,611		7,576,990
Loans held for sale	27,289		28,968
Accrued interest receivable	26,888		28,449
Interest rate swap - non-designated hedge	157,014		210,216
Other derivative financial instruments (mortgage banking related)	$ 2,273		$ 800
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Derivative Asset, Noncurrent		Derivative Asset, Noncurrent
Financial liabilities:
Deposits	$ 36,333,275		$ 36,264,401
Federal funds purchased and securities sold under agreements to repurchase	556,417		556,417
Corporate and subordinated debentures	380,925		377,360
Other borrowings	900,000
Accrued interest payable	20,411		3,345
Interest rate swap - non-designated hedge	806,584		1,033,980
Other derivative financial instruments (mortgage banking related)			163
Significant Other Observable Inputs (Level 2) | Commitments to extend credit
Financial liabilities:
Commitments to extend credit	(255,022)		(184,801)
Significant Unobservable Inputs (Level 3)
Financial assets:
Loans, net of allowance for credit losses	29,646,800		29,329,499
Accrued interest receivable	111,627		106,145
Mortgage servicing rights	85,406		86,610
SBA servicing asset	$ 6,521		$ 6,068

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Changes in components of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	$ (677,088)
Net comprehensive (loss) income	63,304	$ (272,810)
Balance at the end of the period	(613,784)
Benefit Plans
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	(673)	57
Balance at the end of the period	(673)	57
Unrealized Gains and (Losses) on Securities Available for Sale
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	(676,415)	(21,203)
Other comprehensive income (loss) before reclassifications	63,271	(272,810)
Amounts reclassified from accumulated other comprehensive loss	33
Net comprehensive (loss) income	63,304	(272,810)
Balance at the end of the period	(613,111)	(294,013)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	(677,088)	(21,146)
Other comprehensive income (loss) before reclassifications	63,271	(272,810)
Amounts reclassified from accumulated other comprehensive loss	33
Net comprehensive (loss) income	63,304	(272,810)
Balance at the end of the period	$ (613,784)	$ (293,956)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassifications out of accumulated other comprehensive income, net of tax
Provision for income taxes	$ 39,096	$ 27,084
Net income	139,926	$ 100,329
Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications out of accumulated other comprehensive income, net of tax
Net income	33
Unrealized Gains and (Losses) on Securities Available for Sale | Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications out of accumulated other comprehensive income, net of tax
Securities gains (losses), net	45
Provision for income taxes	12
Net income	$ 33

Derivative Financial Instrume_3

Derivative Financial Instruments (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Derivative Financial Instruments
Notional Amount	$ 21,487,939,000		$ 20,979,193,000
Estimated Fair Value Gain	$ 159,286,000		$ 211,016,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other		Noninterest Income, Other
Estimated Fair Value Loss	$ 806,584,000		$ 1,034,143,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other		Noninterest Income, Other
Net gain	$ 96,000	$ 41,000
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other
Reduction in derivative liability fair value	$ 650,000,000		$ 824,300,000
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Fair value of forward commitments	(806,584,000)		(1,034,143,000)
Other Liabilities
Derivative Financial Instruments
Fair value of the interest rate swap derivatives, other liabilities	806,600,000,000		1,000,000,000
Other Assets
Derivative Financial Instruments
Fair value of the interest rate swap derivatives, other assets	156,800,000		209,800,000
Mortgage loan pipeline
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	107,831,000		40,850,000
Expected closures
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	90,737,000		37,210,000
Cash flow hedge
Derivative Financial Instruments
Collateral provided	0		0
Cash flow hedge | Cash and Cash Equivalents | Borrower
Derivative Financial Instruments
Collateral provided	222,700,000
Cash flow hedge | Interest-bearing deposits | Counterparty
Derivative Financial Instruments
Cash collateral	100,300,000
Interest rate contracts
Derivative Financial Instruments
Notional Amount	21,300,000,000		20,900,000,000
Mortgage servicing rights hedging | Non-designated hedges
Derivative Financial Instruments
Notional Amount	67,500,000		35,000,000
Estimated gain (loss) on fair value	1,200,000		163,000
Mortgage servicing rights hedging | Non-designated hedges | Other Assets and Other Liabilities
Derivative Financial Instruments
Notional Amount	67,500,000		$ 35,000,000
Estimated Fair Value Gain	$ 1,158,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]			Noninterest Income, Other
Estimated Fair Value Loss			$ 163,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other
Mortgage loan pipeline commitments hedging
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	$ 1,848,000		524,000
Mortgage loan pipeline commitments hedging | Non-designated hedges | Other Assets
Derivative Financial Instruments
Notional Amount	100,500,000		51,000,000
Estimated Fair Value Gain	$ 1,115,000		$ 800,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other		Noninterest Income, Other
Forward commitments
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	$ 100,500,000		$ 51,000,000
Fair value of forward commitments	(734,000)		276,000
Customer swaps | Cash flow hedge
Derivative Financial Instruments
Collateral provided	113,200,000
Foreign exchange swaps
Derivative Financial Instruments
Gain or loss recorded	0	$ 0
Interest rate swap | Fair Value Hedging | Counterparty
Derivative Financial Instruments
Notional Amount	12,200,000		12,300,000
Interest rate swap | Fair Value Hedging | Other Liabilities | Counterparty
Derivative Financial Instruments
Notional Amount	12,186,000		12,289,000
Estimated Fair Value Gain	$ 206,000		$ 414,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Interest rate swap | Non-designated hedges | Other Assets and Other Liabilities | Borrower
Derivative Financial Instruments
Notional Amount	$ 10,701,004,000		$ 10,480,171,000
Estimated Fair Value Gain	$ 28,580,000		$ 8,539,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other		Noninterest Income, Other
Estimated Fair Value Loss	$ 805,749,000		$ 1,033,980,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other		Noninterest Income, Other
Interest rate swap | Non-designated hedges | Other Assets and Other Liabilities | Counterparty
Derivative Financial Instruments
Notional Amount	$ 10,606,749,000		$ 10,400,733,000
Estimated Fair Value Gain	$ 128,227,000		$ 201,263,000
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other
Estimated Fair Value Loss	$ 835,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other		Noninterest Income, Other

Capital Ratios (Details)

Capital Ratios (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2020	Jan. 01, 2019
Capital ratios
Capital conversion buffer common equity Tier 1 of risk-weighted assets (as a percent)						2.50%
Additional allowance for credit losses for loans	$ 300,396	$ 370,645	$ 356,444	$ 301,807
Deferred tax assets		165,161	177,801
Additional reserve for unfunded commitments		85,100
Retained earnings		1,448,636	1,347,042
Phasing out percentage	50%
Common equity Tier 1 to risk-weighted assets
Actual, Capital Amount		$ 3,891,155	$ 3,788,106
Actual, Ratio (as a percent)		11.13%	10.96%
Required to be considered well capitalized, Capital Amount		$ 2,271,735	$ 2,247,530
Required to be considered well capitalized, Ratio (as a percent)		6.50%	6.50%
Tier I capital to risk-weighted assets
Actual, Capital Amount		$ 3,891,155	$ 3,788,106
Actual, Ratio (as a percent)		0.1113	0.1096
Minimum capital required, Capital Amount		$ 2,795,981	$ 2,766,190
Minimum capital required, Ratio (as a percent)		0.0800	0.0800
Total capital to risk-weighted assets
Actual, Capital Amount		$ 4,647,783	$ 4,485,397
Actual, Ratio (as a percent)		0.1330	0.1297
Required to be considered well capitalized, Capital Amount		$ 3,494,976	$ 3,457,738
Required to be considered well capitalized, Ratio (as a percent)		0.1000	0.1000
Tier I capital to average assets (leverage ratio)
Actual, Capital Amount		$ 3,891,155	$ 3,788,106
Actual, Ratio (as a percent)		0.0905	0.0872
Required to be considered well capitalized, Capital Amount		$ 2,149,255	$ 2,171,239
Required to be considered well capitalized, Ratio (as a percent)		0.0500	0.0500
ASU 2016-13
Capital ratios
Additional allowance for credit losses for loans					$ 54,400
Deferred tax assets					12,600
Retained earnings					(44,800)
ASU 2016-13 | Adjustments
Capital ratios
Additional reserve for unfunded commitments					$ 6,400
SouthState Bank (the Bank)
Common equity Tier 1 to risk-weighted assets
Actual, Capital Amount		$ 4,165,577	$ 4,074,045
Actual, Ratio (as a percent)		11.93%	11.80%
Required to be considered well capitalized, Capital Amount		$ 2,268,697	$ 2,244,481
Required to be considered well capitalized, Ratio (as a percent)		6.50%	6.50%
Tier I capital to risk-weighted assets
Actual, Capital Amount		$ 4,165,577	$ 4,074,045
Actual, Ratio (as a percent)		0.1193	0.1180
Minimum capital required, Capital Amount		$ 2,792,242	$ 2,762,438
Minimum capital required, Ratio (as a percent)		0.0800	0.0800
Total capital to risk-weighted assets
Actual, Capital Amount		$ 4,532,206	$ 4,381,336
Actual, Ratio (as a percent)		0.1299	0.1269
Required to be considered well capitalized, Capital Amount		$ 3,490,303	$ 3,453,047
Required to be considered well capitalized, Ratio (as a percent)		0.1000	0.1000
Tier I capital to average assets (leverage ratio)
Actual, Capital Amount		$ 4,165,577	$ 4,074,045
Actual, Ratio (as a percent)		0.0970	0.0939
Required to be considered well capitalized, Capital Amount		$ 2,148,291	$ 2,170,412
Required to be considered well capitalized, Ratio (as a percent)		0.0500	0.0500
Fully Phased-In
Common equity Tier 1 to risk-weighted assets
Minimum capital required, Capital Amount		$ 2,446,483	$ 2,420,417
Minimum capital required, Ratio (as a percent)		7%	7%
Tier I capital to risk-weighted assets
Required to be considered well capitalized, Capital Amount		$ 2,970,730	$ 2,939,077
Required to be considered well capitalized, Ratio (as a percent)		0.0850	0.0850
Total capital to risk-weighted assets
Minimum capital required, Capital Amount		$ 3,669,725	$ 3,630,625
Minimum capital required, Ratio (as a percent)		0.1050	0.1050
Tier I capital to average assets (leverage ratio)
Minimum capital required, Capital Amount		$ 1,719,404	$ 1,736,991
Minimum capital required, Ratio (as a percent)		0.0400	0.0400
Fully Phased-In | SouthState Bank (the Bank)
Common equity Tier 1 to risk-weighted assets
Minimum capital required, Capital Amount		$ 2,443,212	$ 2,417,133
Minimum capital required, Ratio (as a percent)		7%	7%
Tier I capital to risk-weighted assets
Required to be considered well capitalized, Capital Amount		$ 2,966,757	$ 2,935,090
Required to be considered well capitalized, Ratio (as a percent)		0.0850	0.0850
Total capital to risk-weighted assets
Minimum capital required, Capital Amount		$ 3,664,818	$ 3,625,700
Minimum capital required, Ratio (as a percent)		0.1050	0.1050
Tier I capital to average assets (leverage ratio)
Minimum capital required, Capital Amount		$ 1,718,633	$ 1,736,330
Minimum capital required, Ratio (as a percent)		0.0400	0.0400
Minimum
Common equity Tier 1 to risk-weighted assets
Actual, Ratio (as a percent)		4.50%
Tier I capital to risk-weighted assets
Required to be considered well capitalized, Ratio (as a percent)		0.06
Total capital to risk-weighted assets
Actual, Ratio (as a percent)		0.04
Tier I capital to average assets (leverage ratio)
Actual, Ratio (as a percent)		0.08

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 01, 2022
Goodwill [Line Items]
Goodwill	$ 1,923,106	$ 1,923,106
Impairment Charges	$ 0
Atlantic Capital
Goodwill [Line Items]
Goodwill			$ 342,021

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Summary of gross carrying amounts (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Other intangible assets
Gross carrying amount	$ 275,321		$ 274,869
Accumulated amortization	(165,718)		(158,419)
Net carrying amount	109,603		116,450
Amortization expense	7,299	$ 8,494
Fair value of SBA servicing assets	$ 6,500		$ 6,100
Minimum
Other intangible assets
Estimated useful lives	2 years
Maximum
Other intangible assets
Estimated useful lives	15 years

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Amortization expense (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Estimated amortization expense
Net carrying amount	$ 109,603	$ 116,450
Other intangibles, excluding the SBA servicing assets
Estimated amortization expense
June 30, 2023	7,028
September 30, 2023	6,616
December 31, 2023	6,615
March 31, 2024	6,003
June 30, 2024	5,739
Thereafter	71,082
Net carrying amount	$ 103,083

Mortgage Loan Servicing, Orig_3

Mortgage Loan Servicing, Origination, and Loans Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Mortgage Loan Servicing, Origination, and Loans Held for Sale
Residential mortgages serviced for others	$ 6,600,000		$ 6,600,000
Contractually specified servicing fees earned	4,100	$ 3,800
Mortgage servicing rights	85,406		$ 86,610
Changes in the fair value of MSRs and its offsetting hedge.
(Decrease) increase in fair value of MSRs	(1,290)	12,827
Decay of MSRs	(1,409)	(2,230)
Gain (loss) related to derivatives	145	(11,838)
Net effect on Consolidated Statements of Net Income	$ (2,554)	$ (1,241)
Characteristics and sensitivity analysis of the MSR
Composition of residential loans serviced for others	100%		100%
Weighted average life (in years)	8 years 2 months 26 days		8 years 4 months 13 days
Constant Prepayment rate (CPR) (as a percent)	6.60%		6.40%
Weighted average discount rate (as a percent)	10%		10%
Effect on fair value due to change in interest rates:
25 basis point increase	$ 1,012		$ 774
50 basis point increase	1,888		1,428
25 basis point decrease	(1,146)		(902)
50 basis point decrease	$ (2,422)		$ (1,938)
Fixed-rate mortgage loans
Characteristics and sensitivity analysis of the MSR
Composition of residential loans serviced for others	100%		100%

Mortgage Loan Servicing, Orig_4

Mortgage Loan Servicing, Origination, and Loans Held for Sale - Mandatory cash forwards (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Mortgage loan securitizations, mandatory cash forwards, and whole loan sales
Loan sales	$ 159,400	$ 700,700
Loan securitizations and loan sales	$ 123,000	$ 530,500
Percentage of loan securitizations and loan sales	77.20%	75.70%
Loans held for sale	$ 27,289		$ 28,968
Minimum
Mortgage loan securitizations, mandatory cash forwards, and whole loan sales
Loans held for sale, settlement period	15 days
Maximum
Mortgage loan securitizations, mandatory cash forwards, and whole loan sales
Loans held for sale, settlement period	45 days

Short-Term Borrowings (Details)

Short-Term Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Secured Debt, Repurchase Agreements
Carrying amount of securities sold under repurchase agreements with customers	$ 310,800	$ 342,800
Carrying amount of the securities pledged to collateralize repurchase agreements	8,014,663	8,189,780
Federal funds purchased	233,354	213,597
Letter of credit outstanding	2,100
Loans	30,325,497	29,821,418
FRB Borrowings
Secured Debt, Repurchase Agreements
Letter of credit outstanding	0	0
Maximum borrowing capacity	2,500,000
Loans	2,500,000
FHLB Advances [ Member ]
Secured Debt, Repurchase Agreements
Outstanding advances	$ 900,000
weighted average interest rate	5.07%
Debt Instrument Collateral Amount	$ 6,500,000
Amount of cash pledged as collateral	355,000
Letter of credit outstanding	900,000
Unused net credit available with the FHLB	6,000,000
Debt Instrument Unused Borrowing Capacity Amount	6,900,000
Asset Pledged as Collateral [Member]
Secured Debt, Repurchase Agreements
Carrying amount of the securities pledged to collateralize repurchase agreements	$ 2,400,000	2,600,000
Asset Pledged as Collateral [Member] | FRB Borrowings
Secured Debt, Repurchase Agreements
Financing Receivable, Pledging Purpose [Extensible Enumeration]	Federal funds purchased
Asset Pledged as Collateral [Member] | Securities Sold under Agreements to Repurchase [Member]
Secured Debt, Repurchase Agreements
Carrying amount of the securities pledged to collateralize repurchase agreements	$ 435,500	$ 443,200

Stock Repurchase Program (Detai

Stock Repurchase Program (Details) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2023	Apr. 27, 2022
Stock repurchase program
Shares authorized under repurchase program			4,120,021
2021 Stock Repurchase Plan
Stock repurchase program
Number of shares repurchased	1,012,038
Average price per share	$ 85.43
Additional shares available for repurchase			370,021
2022 Stock Repurchase Plan
Stock repurchase program
Shares authorized under repurchase program		0	3,750,000

Subsequent Events (Details)

Subsequent Events (Details) - $ / shares		3 Months Ended
	Apr. 27, 2023	Mar. 31, 2023	Mar. 31, 2022
Subsequent Events
Cash dividends declared (in dollars per share)	$ 0.50	$ 0.50	$ 0.49