PARENT COMPANY ONLY FINANCIAL INFORMATION - Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Dividends from subsidiaries:
Other income	$ 14,822	$ 10,292	$ 8,356
Expense:
Salaries, wages, and employee benefits	159,016	145,312	126,719
Interest expense	36,548	28,102	43,663
Income tax benefit	(33,426)	(33,374)	(27,862)
Equity in undistributed (in excess of) net income of subsidiaries:
Net income	128,311	123,449	100,344
Parent Company
Dividends from subsidiaries:
Bank	95,000	60,000	122,000
Non-bank	1,630	1,745	0
Interest income	1,094	79	154
Gains (losses) recognized on equity securities, net	(2,159)	3,041	(393)
Other income	15,195	12,109	10,083
Total operating income	110,760	76,974	131,844
Expense:
Salaries, wages, and employee benefits	20,964	17,914	16,205
Interest expense	17,854	15,163	12,056
Operating expense	7,294	7,429	7,685
Total expense	46,112	40,506	35,946
Income (loss) before income tax benefit and equity in undistributed (in excess of) net income of subsidiaries	64,648	36,468	95,898
Income tax benefit	8,286	8,974	7,727
Income (loss) before equity in undistributed (in excess of) net income of subsidiaries	72,934	45,442	103,625
Equity in undistributed (in excess of) net income of subsidiaries:
Bank	55,986	77,941	(5,221)
Non-bank	(609)	66	1,940
Net income	$ 128,311	$ 123,449	$ 100,344