CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Adjustment	Adjusted Balance	Common Stock	Common Stock Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Adjusted Balance	Retained Earnings	Retained Earnings Adjustment	Retained Earnings Adjusted Balance	Treasury Stock	Treasury Stock Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Adjusted Balance
Beginning balance at Dec. 31, 2018	$ 229,848			$ 7,753		$ 205,770		$ 75,171			$ (39,974)		$ (18,872)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	30,404							30,404
Cash dividends	(15,234)							(15,234)
Issuance of common shares pursuant to stock-based compensation plan, net	(59)					(1,417)					1,358
Exercise of SARs	(1,066)					(2,100)					1,034
Stock-based compensation expense	3,144					3,144
Purchase of common shares	(7,799)										(7,799)
Other comprehensive income	4,952												4,952
Ending balance at Dec. 31, 2019	$ 244,190	$ (856)	$ 243,334	7,753	$ 7,753	205,397	$ 205,397	90,341	$ (856)	$ 89,485	(45,381)	$ (45,381)	(13,920)	$ (13,920)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-13 [Member]
Net income	$ 25,176							25,176
Cash dividends	(15,599)							(15,599)
Issuance of common shares pursuant to stock-based compensation plan, net	(996)					(2,546)					1,550
Exercise of SARs	(102)					(243)					141
Stock-based compensation expense	2,267					2,267
Purchase of common shares	(6,825)										(6,825)
Other comprehensive income	13,905												13,905
Ending balance at Dec. 31, 2020	261,160			7,753		204,875		99,062			(50,515)		(15)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	28,604							28,604
Cash dividends	(15,446)							(15,446)
Issuance of common shares pursuant to stock-based compensation plan, net	(690)					(2,939)					2,249
Exercise of SARs	(160)					(519)					359
Stock-based compensation expense	2,859					2,859
Purchase of common shares	(30,997)										(30,997)
Other comprehensive income	468												468
Ending balance at Dec. 31, 2021	$ 245,798			$ 7,753		$ 204,276		$ 112,220			$ (78,904)		$ 453