INCOME TAXES - Reconciliation Effective Income Tax Amount (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Federal income statutory rate	21.00%	21.00%	21.00%
Tax at federal income tax rate	$ 95,151	$ 104,166	$ 71,460
Change resulting from:
State income tax, net of federal benefit	13,763	18,923	9,812
Tax-exempt interest	(2,775)	(3,479)	(3,726)
Increase in cash value of bank owned life insurance	(1,399)	(997)	(594)
Excess tax (benefit) deficiency from stock compensation	(510)	(277)	371
Nondeductible merger expenses	167	142	2
Other	2,161	721	2,827
Benefit related to carryback claims resulting from the CARES Act	0	0	(1,896)
Provision for income taxes	$ 106,558	$ 119,199	$ 78,256