Condensed Financial Information (parent company only) - Condensed Statements of Income and Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income
Other income	$ 1,929	$ 3,008	$ 1,898
Expenses
Interest expense	84,803	35,952	66,381
Salaries and employee benefits	206,893	166,995	155,937
Other expenses	26,713	19,300	18,001
Income tax benefit	(33,585)	(35,259)	(21,375)
NET INCOME	222,089	205,531	148,600
Preferred stock dividends	1,406	0	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	220,683	205,531	148,600
Other comprehensive income (loss)	(294,264)	(19,723)	46,962
Comprehensive income (loss)	(72,175)	185,808	195,562
Parent
Income
Dividends from subsidiaries	90,500	161,825	70,100
Other income	(1,693)	(50)	(62)
Total income	88,807	161,775	70,038
Expenses
Interest expense	8,005	6,642	6,777
Salaries and employee benefits	3,786	3,917	3,426
Net occupancy and equipment expenses	46	825	745
Professional and other outside services	2,187	1,264	949
Other expenses	1,396	1,687	1,266
Total expenses	15,420	14,335	13,163
Income before income tax benefit and equity in undistributed income of subsidiaries	73,387	147,440	56,875
Income tax benefit	3,645	2,929	2,260
Income before equity in undistributed income of subsidiaries	77,032	150,369	59,135
Equity in undistributed income of subsidiaries	145,057	55,162	89,465
NET INCOME	222,089	205,531	148,600
Preferred stock dividends	1,406	0	0
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS	220,683	205,531	148,600
Other comprehensive income (loss)	(294,264)	(19,723)	46,962
Comprehensive income (loss)	$ (72,175)	$ 185,808	$ 195,562