Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Performance Shares [Member] Common Stock [Member]	Performance Shares [Member] Additional Paid-in Capital [Member]	Performance Shares [Member] Retained Earnings [Member]	Performance Shares [Member] AOCI Attributable to Parent [Member]	Performance Shares [Member]	Restricted and Performance Shares [Member] Common Stock [Member]	Restricted and Performance Shares [Member] Additional Paid-in Capital [Member]	Restricted and Performance Shares [Member] Retained Earnings [Member]	Restricted and Performance Shares [Member] AOCI Attributable to Parent [Member]	Restricted and Performance Shares [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2020																15,391,660
Balance at Dec. 31, 2020																$ 15	$ 61,844	$ 141,972	$ (12,201)	$ 191,630
Common shares issued upon exercise of options, net (in shares)																10,746
Common shares issued upon exercise of options, net																	298	(168)		130
Performance based shares issued (in shares)																39,675
Performance based shares issued																				0
Restricted shares issued (in shares)																140,754
Restricted shares issued																				0
Share-based compensation expense																	832			832
Tax withheld on vesting of performance based shares		$ (372)			$ (372)
Tax benefit from vesting of acquisition-related restricted stock																	171			171
Cash dividends declared																		(1,548)		(1,548)
Net earnings																		10,478		10,478
Cash flow hedges, net of taxes																			(5)	(5)
Pensions, net of taxes																			714	714
Change in currency translation adjustment, net of taxes																			(647)	(647)
Balance (in shares) at Mar. 31, 2021																15,582,835
Balance at Mar. 31, 2021																$ 15	62,773	150,734	(12,139)	$ 201,383
Balance (in shares) at Dec. 31, 2021																16,127,505				16,127,505
Balance at Dec. 31, 2021													$ (76)		$ (76)	$ 16	69,351	163,836	(6,213)	$ 226,990
Common shares issued upon exercise of options, net (in shares)																				21,108
Performance based shares issued (in shares)																11,707
Performance based shares issued																				$ 0
Restricted shares issued (in shares)																23,677
Restricted shares issued																				0
Share-based compensation expense																	1,212			1,212
Tax withheld on vesting of performance based shares							$ (232)			$ (232)
Cash dividends declared																		(1,918)		(1,918)
Net earnings																		5,230		5,230
Cash flow hedges, net of taxes																			(5)	(5)
Pensions, net of taxes																			319	319
Change in currency translation adjustment, net of taxes																			862	$ 862
Balance (in shares) at Mar. 31, 2022																16,171,034				16,171,034
Balance at Mar. 31, 2022																$ 16	70,685	166,914	$ (5,037)	$ 232,578
Common shares issued upon exercise of options and SARs, net (in shares)																15,702
Common shares issued upon exercise of options and SARs, net																	$ 354	$ (158)		$ 196
Tax withheld on vesting of restricted shares and performance based shares (in shares)						(7,557)