CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income:
Loans, including fees	$ 508,963	$ 315,935	$ 1,419,761	$ 795,164
Securities:
Taxable	36,525	18,204	97,850	41,977
Tax-exempt	24,185	21,408	72,590	58,752
Federal funds sold and other	57,621	16,217	118,371	26,864
Total interest income	627,294	371,764	1,708,572	922,757
Interest expense:
Deposits	280,305	55,189	685,562	83,620
Securities sold under agreements to repurchase	1,071	182	2,449	320
Federal Home Loan Bank advances and other borrowings	28,676	10,609	75,695	28,984
Total interest expense	310,052	65,980	763,706	112,924
Net interest income	317,242	305,784	944,866	809,833
Provision for credit losses	26,826	27,493	77,282	43,120
Net interest income after provision for credit losses	290,416	278,291	867,584	766,713
Noninterest income:
Total noninterest income	90,797	104,805	354,165	333,803
Noninterest expense:
Salaries and employee benefits	130,344	129,910	398,495	378,373
Equipment and occupancy	36,900	27,886	100,959	80,343
Other real estate expense, net	33	(90)	190	101
Marketing and other business development	5,479	4,958	17,085	13,494
Postage and supplies	2,621	2,795	8,303	7,486
Amortization of intangibles	1,765	1,951	5,339	5,873
Other noninterest expense	36,091	31,843	106,230	92,282
Total noninterest expense	213,233	199,253	636,601	577,952
Income before income taxes	167,980	183,843	585,148	522,564
Income tax expense	35,377	35,185	117,975	99,669
Net income	132,603	148,658	467,173	422,895
Preferred stock dividends	(3,798)	(3,798)	(11,394)	(11,394)
Net income available to common shareholders	$ 128,805	$ 144,860	$ 455,779	$ 411,501
Per share information:
Basic net income per common share	$ 1.69	$ 1.91	$ 6.00	$ 5.43
Diluted net income per common share	$ 1.69	$ 1.91	$ 5.99	$ 5.42
Weighted average common shares outstanding:
Basic	76,044,182	75,761,930	75,998,965	75,723,129
Diluted	76,201,916	75,979,056	76,102,622	75,945,469
Service charges on deposit accounts
Noninterest income:
Total noninterest income	$ 12,665	$ 10,906	$ 36,563	$ 33,552
Investment services
Noninterest income:
Total noninterest income	13,253	10,780	39,022	34,676
Insurance sales commissions
Noninterest income:
Total noninterest income	2,882	2,928	10,598	9,518
Gain on mortgage loans sold, net
Noninterest income:
Total noninterest income	2,012	1,117	5,632	7,333
Investment gains (losses) on sales, net
Noninterest income:
Total noninterest income	(9,727)	217	(19,688)	156
Trust fees
Noninterest income:
Total noninterest income	6,640	5,706	19,696	17,744
Income from equity method investment
Noninterest income:
Total noninterest income	24,967	41,341	70,970	124,461
Gain on sale of fixed assets
Noninterest income:
Total noninterest income	87	227	85,946	425
Other noninterest income
Noninterest income:
Total noninterest income	$ 38,018	$ 31,583	$ 105,426	$ 105,938