Parent Company only Condensed Financial Information - Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income	$ 64,443	$ 66,555	$ 47,700
Adjustments to reconcile net income to net cash provided by operations:
Amortization of restricted stock awards, net	1,404	2,583	1,940
Net cash provided by operating activities	73,010	69,853	56,849
Cash flows from financing activities:
Proceeds from exercise of stock options	1,220	2,050	1,469
Net cash (used in) provided by financing activities	(41,666)	(399,979)	815,125
Net increase (decrease) in cash and cash equivalents	101,526	(999,613)	175,143
Cash and cash equivalents, beginning of period	306,603	1,306,216	1,131,073
Cash and cash equivalents, end of period	408,129	306,603	1,306,216
Parent Company
Cash flows from operating activities:
Net income	64,443	66,555	47,700
Adjustments to reconcile net income to net cash provided by operations:
Amortization of restricted stock awards, net	1,404	2,583	1,940
Equity in undistributed net income of subsidiary bank	(36,648)	(38,702)	(20,127)
Net change in other assets and liabilities	(1,174)	1,222	(603)
Net cash provided by operating activities	28,025	31,658	28,910
Cash flows from financing activities:
Repayment of subordinated debt		(40,000)
Net change in purchased funds and other short-term borrowings		39,274
Payment of cash dividends	(31,740)	(31,495)	(31,270)
Proceeds from exercise of stock options	1,220	2,050	1,469
Net cash (used in) provided by financing activities	(30,520)	(30,171)	(29,801)
Net increase (decrease) in cash and cash equivalents	(2,495)	1,487	(891)
Cash and cash equivalents, beginning of period	20,974	19,487	20,378
Cash and cash equivalents, end of period	$ 18,479	$ 20,974	$ 19,487