Consolidated Statements Of Changes In Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss
Beginning Balance (in shares) at Dec. 31, 2019			15,144,719
Beginning Balance at Dec. 31, 2019	$ 473,415	$ (2,809)	$ 139,103	$ 340,580	$ (2,809)	$ (6,268)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	59,486			59,486
Other comprehensive income, net of tax	27,008					27,008
Stock-based compensation expense	1,785		$ 1,785
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit (shares)			38,732
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit	(116)		$ (116)
Common stock repurchased (in shares)			(274,354)
Stock Repurchased During Period, Value	(9,700)		$ (9,700)
Cash dividends declared	(19,755)			(19,755)
Ending Balance (in shares) at Dec. 31, 2020			14,909,097
Ending Balance at Dec. 31, 2020	529,314		$ 131,072	377,502		20,740
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	69,014			69,014
Other comprehensive income, net of tax	(26,969)					(26,969)
Stock-based compensation expense	2,381		$ 2,381
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit (shares)			48,790
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit	(263)		$ (263)
Common stock repurchased (in shares)			(217,931)
Stock Repurchased During Period, Value	(10,079)		$ (10,079)
Cash dividends declared	(22,104)			(22,104)
Ending Balance (in shares) at Dec. 31, 2021			14,739,956
Ending Balance at Dec. 31, 2021	541,294		$ 123,111	424,412	$ (2,800)	(6,229)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	61,439			61,439
Other comprehensive income, net of tax	(119,726)					(119,726)
Stock-based compensation expense	2,553		$ 2,553
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit (shares)			52,614
Exercise of stock options and issuance of vested share awards, net of repurchase for tax withholdings and tax benefit	(355)		$ (355)
Common stock repurchased (in shares)			(225,245)
Stock Repurchased During Period, Value	(10,240)		$ (10,240)
Cash dividends declared	(23,687)			(23,687)
Ending Balance (in shares) at Dec. 31, 2022			14,567,325
Ending Balance at Dec. 31, 2022	$ 451,278		$ 115,069	$ 462,164		$ (125,955)