Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows From Operating Activities
Net income	$ 146,936	$ 95,644	$ 81,477
Reconciliation of net income to net cash provided by operating activities:
Provision for credit losses	12,400	15,031	35,039
Net security premium amortization	12,005	14,058	5,019
Deferred tax benefit	(1,810)	(4,800)	(10,007)
Loan discount accretion	(5,622)	(8,814)	(6,328)
Other purchase accounting accretion and amortization, net	(340)	(47)	81
Foreclosed property (gains) losses/write-downs, net	(372)	24	547
Losses (gains) on securities available for sale	0	1,237	(8,024)
Other (gains) losses	(4,069)	(1,648)	54
Bank-owned life insurance income	(3,847)	(2,885)	(2,533)
(Decrease) increase in net deferred loan fees	(301)	(1,994)	5,639
Depreciation of premises and equipment	6,859	6,187	5,838
Amortization of operating lease right-of-use assets	1,986	1,937	2,012
Repayments of lease obligations	(1,801)	(1,814)	(1,844)
Stock-based compensation expense	2,982	2,268	2,540
Amortization of intangible assets	3,684	3,531	3,956
Amortization of SBA servicing assets	2,800	2,272	1,795
Fees/gains from sales of presold mortgages and SBA loans	(7,178)	(18,304)	(22,156)
Originations of presold mortgage loans in process of settlement	(104,596)	(326,019)	(418,394)
Proceeds from sales of presold mortgage loans in process of settlement	124,181	359,300	410,898
Origination of SBA loans for sale	(74,452)	(88,304)	(147,934)
Proceeds from sales of SBA loans	119,549	79,125	115,460
Increase in accrued interest receivable	(3,814)	(773)	(3,624)
Decrease in other assets	11,352	17,412	267
Increase (decrease) in accrued interest payable	2,131	(683)	(1,250)
(Decrease) increase in other liabilities	(8,009)	394	9,805
Net cash provided by operating activities	230,654	142,335	58,333
Cash Flows From Investing Activities
Purchases of securities available for sale	(354,765)	(1,572,355)	(1,060,054)
Purchases of securities held to maturity	(39,004)	(271,169)	(133,611)
Proceeds from maturities/issuer calls of securities available for sale	251,314	358,259	223,842
Proceeds from maturities/issuer calls of securities held to maturity	6,500	13,642	33,030
Proceeds from sales of securities available for sale	0	106,484	219,697
(Purchases) redemptions of FRB and FHLB stock, net	(17,244)	2,043	9,851
Purchases of bank owned life insurance	0	(25,000)	0
Proceeds from bank owned life insurance death benefits	8,312	0	0
Purchases of other investments	(7,990)	(3,434)	(1,258)
Net increase in loans	(558,398)	(97,559)	(233,788)
Proceeds from sales of foreclosed properties	2,904	3,995	2,485
Purchases of premises and equipment	(5,287)	(9,402)	(12,363)
Proceeds from sales of premises and equipment	299	313	189
Net cash received (paid) in acquisition activities	0	208,992	(9,559)
Net cash received in disposition activities	0	11,314	0
Net cash used by investing activities	(713,359)	(1,273,877)	(961,539)
Cash Flows From Financing Activities
Net increase in deposits	103,494	1,258,193	1,342,340
Net increase (decrease) in short-term borrowings	220,000	0	(198,000)
Proceeds from long-term borrowings	0	0	150,000
Payments on long-term borrowings	(133)	(5,729)	(202,035)
Cash dividends paid – common stock	(30,660)	(22,228)	(20,936)
Repurchases of common stock	0	(4,036)	(31,868)
Payment of taxes related to stock withheld	(840)	(786)	(307)
Net cash provided by financing activities	291,861	1,225,414	1,039,194
(Decrease) increase in Cash and Cash Equivalents	(190,844)	93,872	135,988
Cash and Cash Equivalents, Beginning of Year	461,162	367,290	231,302
Cash and Cash Equivalents, End of Year	270,318	461,162	367,290
Supplemental Disclosures of Cash Flow Information:
Cash paid during the period for interest	14,312	10,206	20,812
Cash paid during the period for income taxes	39,722	32,506	29,604
Non-cash:  Foreclosed loans transferred to foreclosed real estate	119	2,285	1,583
Non-cash:  Unrealized (loss) gain on securities available for sale, net of taxes	(317,319)	(41,400)	14,425
Non-cash:  Accrued dividends at period end	7,857	7,125	5,144
Non-cash: Initial recognition of operating lease right-of-use assets and liabilities	0	2,191	253
Non-cash: Derecognition of intangible assets related to sale of insurance operations	$ 0	$ (10,229)	$ 0