CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest income:
Loans, including fees	$ 252,182	$ 232,788	$ 479,229	$ 460,160
Securities:
Taxable	12,725	8,359	23,773	16,087
Tax-exempt	19,898	16,546	37,344	32,044
Federal funds sold and other	7,571	1,543	10,647	2,862
Total interest income	292,376	259,236	550,993	511,153
Interest expense:
Deposits	18,181	13,861	28,431	31,329
Securities sold under agreements to repurchase	82	56	138	128
Federal Home Loan Bank advances and other borrowings	9,539	12,094	18,375	23,601
Total interest expense	27,802	26,011	46,944	55,058
Net interest income	264,574	233,225	504,049	456,095
Provision for credit losses	12,907	2,834	15,627	10,069
Net interest income after provision for credit losses	251,667	230,391	488,422	446,026
Noninterest income:
Total noninterest income	125,502	98,207	228,998	190,916
Noninterest expense:
Salaries and employee benefits	126,611	110,824	248,463	213,552
Equipment and occupancy	26,921	23,321	52,457	46,541
Other real estate (income) expense, net	86	(657)	191	(670)
Marketing and other business development	4,759	2,652	8,536	5,001
Postage and supplies	2,320	2,115	4,691	3,921
Amortization of intangibles	2,051	2,167	3,922	4,373
Other noninterest expense	33,290	25,718	60,439	48,118
Total noninterest expense	196,038	166,140	378,699	320,836
Income before income taxes	181,131	162,458	338,721	316,106
Income tax expense	36,004	30,668	64,484	58,888
Net income	145,127	131,790	274,237	257,218
Preferred stock dividends	(3,798)	(3,798)	(7,596)	(7,596)
Net income available to common shareholders	$ 141,329	$ 127,992	$ 266,641	$ 249,622
Per share information:
Basic net income per common share	$ 1.87	$ 1.70	$ 3.52	$ 3.31
Diluted net income per common share	$ 1.86	$ 1.69	$ 3.51	$ 3.30
Weighted average common shares outstanding:
Basic	75,751,296	75,481,198	75,703,407	75,427,340
Diluted	75,940,500	75,809,974	75,934,025	75,735,763
Service charges on deposit accounts
Noninterest income:
Total noninterest income	$ 11,616	$ 8,906	$ 22,646	$ 17,213
Investment services
Noninterest income:
Total noninterest income	13,205	8,997	23,896	17,188
Insurance sales commissions
Noninterest income:
Total noninterest income	2,554	2,406	6,590	5,631
Gain on mortgage loans sold, net
Noninterest income:
Total noninterest income	2,150		6,216	20,366
Investment gains (losses) on sales, net
Noninterest income:
Total noninterest income	0	366	(61)	366
Trust fees
Noninterest income:
Total noninterest income	6,065	5,062	12,038	9,749
Income from equity method investment
Noninterest income:
Total noninterest income	49,465	32,071	83,120	61,021
Other noninterest income
Noninterest income:
Total noninterest income	$ 40,447	$ 33,699	$ 74,553	$ 59,382