Condensed Financial Statements of Parent Company, Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities [Abstract]
Net income	$ 88,457	$ 88,314	$ 75,090
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Net cash provided by operating activities	103,735	93,348	101,778
Cash flows from investing activities [Abstract]
Net cash used in investing activities	(274,580)	(146,548)	(315,299)
Cash flows from financing activities [Abstract]
Common stock repurchases	(45,261)	(20,355)	(20,310)
Cash dividends paid	(13,017)	(12,886)	(12,489)
Net used in financing activities	(27,234)	(124,415)	86,318
Net change in cash and cash equivalents	(198,079)	(177,615)	(127,203)
Cash and cash equivalents, beginning of year	410,642	588,257	715,460
Cash and cash equivalents, end of year	212,563	410,642	588,257
Parent Company [Member]
Cash flows from operating activities [Abstract]
Net income	88,457	88,314	75,090
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Equity in undistributed net income of the Bank	(30,193)	(57,128)	(42,565)
Change in other assets and liabilities	169	603	197
Net cash provided by operating activities	58,433	31,789	32,722
Cash flows from investing activities [Abstract]
Securities sold or matured	0	0	124
Net cash used in investing activities	0	0	124
Cash flows from financing activities [Abstract]
Common stock repurchases	(45,261)	(20,355)	(20,310)
Cash dividends paid	(13,017)	(12,886)	(12,489)
Net used in financing activities	(58,278)	(33,241)	(32,799)
Net change in cash and cash equivalents	155	(1,452)	47
Cash and cash equivalents, beginning of year	130	1,582	1,535
Cash and cash equivalents, end of year	$ 285	$ 130	$ 1,582