Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
INTEREST INCOME
Loans, including fees	$ 989,196	$ 694,192	$ 555,008
Interest bearing balances due from banks and federal funds sold	13,490	5,500	2,795
Investment securities	206,918	158,203	111,693
Mortgage loans held for sale	557	720	1,565
Other loans held for sale	0	3,120	0
TOTAL INTEREST INCOME	1,210,161	861,735	671,061
INTEREST EXPENSE
Deposits	472,919	99,049	41,172
Federal funds purchased and securities sold under agreements to repurchase	1,150	941	579
Other borrowings	60,517	24,934	19,495
Subordinated notes and debentures	25,449	19,495	18,283
TOTAL INTEREST EXPENSE	560,035	144,419	79,529
NET INTEREST INCOME	650,126	717,316	591,532
Provision for credit losses	42,028	14,074	(32,704)
NET INTEREST INCOME AFTER PROVISION FOR CREDIT LOSSES	608,098	703,242	624,236
NONINTEREST INCOME
Bank owned life insurance income	11,717	11,146	8,902
(Loss) gain on sale of securities, net	(20,609)	(278)	15,498
Gain on insurance settlement	0	4,074	0
Other income	35,398	27,361	35,273
TOTAL NONINTEREST INCOME	155,566	170,066	191,815
NONINTEREST EXPENSE
Salaries and employee benefits	286,117	286,982	246,335
Occupancy expense, net	46,741	44,321	38,797
Furniture and equipment expense	20,741	20,665	19,890
Other real estate and foreclosure expense	892	1,003	2,121
Deposit insurance	29,986	11,608	6,973
Merger related costs	1,420	22,476	15,911
Other operating expenses	177,164	179,693	153,562
TOTAL NONINTEREST EXPENSE	563,061	566,748	483,589
INCOME BEFORE INCOME TAXES	200,603	306,560	332,462
Provision for income taxes	25,546	50,148	61,306
NET INCOME	175,057	256,412	271,156
Preferred stock dividends	0	0	47
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	$ 175,057	$ 256,412	$ 271,109
BASIC EARNINGS PER SHARE (in dollars per share)	$ 1.39	$ 2.07	$ 2.47
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 1.38	$ 2.06	$ 2.46
Service charges on deposit accounts
NONINTEREST INCOME
Non-interest income	$ 50,530	$ 46,527	$ 43,231
Debit and credit card fees
NONINTEREST INCOME
Non-interest income	31,472	31,203	28,245
Wealth management fees
NONINTEREST INCOME
Non-interest income	30,203	31,895	31,172
Mortgage lending income
NONINTEREST INCOME
Non-interest income	7,733	10,522	21,798
Other service charges and fees
NONINTEREST INCOME
Non-interest income	$ 9,122	$ 7,616	$ 7,696