Condensed Financial Statements of Parent Company, 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 [Abstract]
Net income	$ 88,314	$ 75,090	$ 66,336
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Equity in undistributed net income of the Bank	(57,128)	(42,565)	(58,016)
Net cash provided by operating activities	93,348	101,778	59,963
Cash flows from investing activities [Abstract]
Net cash used in investing activities	(146,548)	(315,299)	(296,150)
Cash flows from financing activities [Abstract]
Common stock repurchases	(20,355)	(20,310)	0
Cash dividends paid	(12,886)	(12,489)	(12,075)
Net cash used in/provided by financing activities	(124,415)	86,318	567,810
Net change in cash and cash equivalents	(177,615)	(127,203)	331,623
Cash and cash equivalents, beginning of period	588,257	715,460	383,837
Cash and cash equivalents, end of period	410,642	588,257	715,460
Parent Company [Member]
Cash flows from operating activities [Abstract]
Net income	88,314	75,090	66,336
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Equity in undistributed net income of the Bank	(57,128)	(42,565)	(58,016)
Change in other assets and liabilities	603	197	739
Net cash provided by operating activities	31,789	32,722	9,059
Cash flows from investing activities [Abstract]
Securities sold or matured	0	124	0
Net cash used in investing activities	0	124	0
Cash flows from financing activities [Abstract]
Common stock repurchases	(20,355)	(20,310)	0
Cash dividends paid	(12,886)	(12,489)	(12,075)
Net cash used in/provided by financing activities	(33,241)	(32,799)	(12,075)
Net change in cash and cash equivalents	(1,452)	47	(3,016)
Cash and cash equivalents, beginning of period	1,582	1,535	4,551
Cash and cash equivalents, end of period	$ 130	$ 1,582	$ 1,535