Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income
Loans	$ 479,910	$ 435,464	$ 466,432
Securities
Taxable	45,523	24,732	24,224
Tax-exempt	7,524	6,800	6,287
Other	8,853	1,689	1,189
Total interest income	541,810	468,685	498,132
Interest expense
Deposits	35,208	28,976	54,016
Borrowings	25,304	15,708	17,319
Total interest expense	60,512	44,684	71,335
Net interest income	481,298	424,001	426,797
Provision for (recovery of) credit losses on loans	23,788	(1,700)	85,350
Provision for credit losses on held to maturity securities	0	32	0
Provision for other credit losses	0	0	1,500
Provision for (recovery of) credit losses	23,788	(1,668)	86,850
Net interest income after provision for credit losses	457,510	425,669	339,947
Noninterest income
Service charges on deposit accounts	39,957	36,569	31,326
Fees and commissions	17,268	15,732	13,043
Insurance commissions	10,754	9,841	8,990
Wealth management revenue	22,339	20,455	16,504
Mortgage banking income	35,794	109,604	150,499
Swap termination gains	0	4,676	0
Net gains on sales of securities	0	2,170	46
BOLI income	9,267	7,366	5,627
Other	13,874	20,571	9,497
Total noninterest income	149,253	226,984	235,532
Noninterest expense
Salaries and employee benefits	261,654	280,627	302,388
Data processing	14,900	21,726	20,685
Net occupancy and equipment	44,819	46,837	54,080
Other real estate owned	(453)	253	2,754
Professional fees	11,872	11,776	11,293
Advertising and public relations	14,325	12,203	10,322
Intangible amortization	5,122	6,042	7,121
Communications	7,958	8,869	8,866
Merger and conversion related expenses	1,787	0	0
Restructuring charges	732	368	7,365
Swap termination charges	0	0	2,040
Debt prepayment penalty	0	6,123	121
Other	32,739	35,002	44,953
Total noninterest expense	395,455	429,826	471,988
Income before income taxes	211,308	222,827	103,491
Income taxes	45,240	46,935	19,840
Net income (loss)	$ 166,068	$ 175,892	$ 83,651
Basic earnings per share (usd per share)	$ 2.97	$ 3.13	$ 1.49
Diluted earnings per share (usd per share)	2.95	3.12	1.48
Cash dividends per common share (usd per share)	$ 0.88	$ 0.88	$ 0.88