Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest Income
Interest and fees on loans	$ 278,027	$ 219,013	$ 213,099
Interest on investment securities:
Taxable interest income	53,536	32,076	20,429
Tax-exempt interest income	4,387	2,402	725
Other, principally overnight investments	5,007	2,427	3,431
Total interest income	340,957	255,918	237,684
Interest Expense
Interest on deposits	11,349	7,881	16,301
Interest on borrowings	4,754	1,642	3,261
Total interest expense	16,103	9,523	19,562
Net interest income	324,854	246,395	218,122
Provision for loan losses	12,600	9,611	35,039
(Reversal of) provision for unfunded commitments	(200)	5,420	0
Total provision for credit losses	12,400	15,031	35,039
Net interest income after provision for credit losses	312,454	231,364	183,083
Noninterest Income
Service charges on deposit accounts	15,523	12,317	11,098
Other service charges, commissions and fees	26,294	25,516	20,097
Fees from presold mortgage loans	2,102	10,975	14,183
Commissions from sales of insurance and financial products	5,195	6,947	8,848
SBA consulting fees	2,608	7,231	8,644
SBA loan sale gains	5,076	7,329	7,973
Bank-owned life insurance income	3,847	2,885	2,533
Securities (losses) gains, net	0	(1,237)	8,024
Other gains (losses), net	7,340	1,648	(54)
Total noninterest income	67,985	73,611	81,346
Noninterest Expense
Salaries	96,321	86,815	84,941
Employee benefits	21,397	16,434	16,027
Total personnel expense	117,718	103,249	100,968
Occupancy expense	12,796	11,528	11,278
Equipment related expenses	5,808	4,492	4,285
Merger and acquisition expenses	5,072	16,845	0
Intangibles amortization	3,684	3,531	3,956
Foreclosed property (gains) losses, net	(372)	24	547
Other operating expenses	50,514	44,987	40,264
Total noninterest expense	195,220	184,656	161,298
Income before income taxes	185,219	120,319	103,131
Income tax expense	38,283	24,675	21,654
Net income	$ 146,936	$ 95,644	$ 81,477
Earnings per common share: Basic (in usd per shares)	$ 4.12	$ 3.19	$ 2.81
Earnings per common share: Diluted (in usd per share)	4.12	3.19	2.81
Dividends declared per common share (in usd per shares)	$ 0.88	$ 0.80	$ 0.72
Weighted average common shares outstanding:
Basic (in shares)	35,485,620	29,876,151	28,839,866
Diluted (in shares)	35,674,730	30,027,785	28,981,567