Consolidated Statements of Changes in Stockholder's Equity (Unaudited) - USD ($) $ in Thousands	Total	Restricted Stock	Common Stock	Common Stock Restricted Stock	Additional Paid-in Capital	Additional Paid-in Capital Restricted Stock	Retained Earnings	Accumulated Other Comprehensive (Loss)	Treasury Stock	Common Stock Held by the Employee Stock Ownership Plan	Stock Held by Rabbi Trust	Deferred Compensation Obligations
Balance at beginning of period at Dec. 31, 2022	$ 1,053,595		$ 1,309		$ 781,165		$ 857,518	$ (179,296)	$ (371,708)	$ (34,750)	$ (3,149)	$ 2,506
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	18,723						18,723
Other comprehensive income (loss)	11,438							11,438
Stock based compensation	1,845				1,845
Purchase of treasury stock	(47,323)								(47,323)
Exercise of stock options	11				11
Restricted stock forfeitures	0				39				(39)
Repurchase shares for taxes	(133)								(133)
Excise tax on net stock repurchases	(475)								(475)
Employee Stock Ownership Plan shares committed to be released	1,142				582					560
Funding of deferred compensation obligations	67										481	(414)
Balance at end of year at Mar. 31, 2023	1,038,890		1,309		783,642		876,241	(167,858)	(419,678)	(34,190)	(2,668)	2,092
Balance at beginning of period at Dec. 31, 2023	1,040,335		1,312		791,450		893,604	(158,735)	(454,128)	(32,478)	(2,955)	2,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(1,155)						(1,155)
Other comprehensive income (loss)	(2,102)							(2,102)
Issuance of common stock allocated to restricted stock award grants		$ 0		$ 2		$ (2)
Stock based compensation	2,029				2,029
Purchase of treasury stock	(1,652)								(1,652)
Exercise of stock options	(49)				(49)
Restricted stock forfeitures	0				27				(27)
Repurchase shares for taxes	(139)								(139)
Excise tax on net stock repurchases	(2)								(2)
Employee Stock Ownership Plan shares committed to be released	987				423					564
Funding of deferred compensation obligations	(227)										(86)	(141)
Balance at end of year at Mar. 31, 2024	$ 1,038,025		$ 1,314		$ 793,878		$ 892,449	$ (160,837)	$ (455,948)	$ (31,914)	$ (3,041)	$ 2,124