Condensed Financial Statements of Parent Company - Statements of Cash Flows (Details) - Parent Company [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income	$ 93,605	$ 88,457	$ 88,314
Equity in undistributed net income of the Bank	(41,468)	(30,193)	(57,128)
Change in other assets and liabilities	555	169	603
Net cash provided by operating activities	52,692	58,433	31,789
Cash flows from investing activities:
Purchase of securities	(3,222)	0	0
Net cash used in investing activities	(3,222)	0	0
Cash flows from financing activities:
Common stock repurchases	(2,933)	(45,261)	(20,355)
Purchase of treasury stock	(31,793)	0	0
Cash dividends paid	(13,841)	(13,017)	(12,886)
Net cash provided by /(used in) financing activities	(48,567)	(58,278)	(33,241)
Net change in cash and cash equivalents	903	155	(1,452)
Cash and cash equivalents, beginning of year	285	130	1,582
Cash and cash equivalents, end of year	$ 1,188	$ 285	$ 130