CONDENSED FINANCIAL INFORMATION (parent company only) - Condensed Statements of Income and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income
Other income	$ 2,722	$ 1,929	$ 3,008
Expenses
Interest expense	348,486	84,803	35,952
Salaries and employee benefits	228,745	206,893	166,995
Other expenses	28,502	26,713	19,300
Income tax benefit	(35,446)	(33,585)	(35,259)
NET INCOME	223,786	222,089	205,531
Preferred stock dividends	1,875	1,406	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	221,911	220,683	205,531
Other comprehensive income (loss)	63,181	(294,264)	(19,723)
Comprehensive income (loss)	286,967	(72,175)	185,808
Parent
Income
Dividends from subsidiaries	131,525	90,500	161,825
Other income	16	(1,693)	(50)
Total income	131,541	88,807	161,775
Expenses
Interest expense	10,164	8,005	6,642
Salaries and employee benefits	4,406	3,786	3,917
Net occupancy and equipment expenses	49	46	825
Professional and other outside services	851	2,187	1,264
Other expenses	2,795	1,396	1,687
Total expenses	18,265	15,420	14,335
Income before income tax benefit and equity in undistributed income of subsidiaries	113,276	73,387	147,440
Income tax benefit	4,526	3,645	2,929
Income before equity in undistributed income of subsidiaries	117,802	77,032	150,369
Equity in undistributed income of subsidiaries	105,984	145,057	55,162
NET INCOME	223,786	222,089	205,531
Preferred stock dividends	1,875	1,406	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	221,911	220,683	205,531
Other comprehensive income (loss)	63,181	(294,264)	(19,723)
Comprehensive income (loss)	$ 286,967	$ (72,175)	$ 185,808