Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Loss [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
Translation loss gain	$ 8,076
Beginning Balance at Dec. 31, 2019	193,017	$ 353	$ 253,869	$ (46,344)	$ (14,505)	$ (356)	$ 0
Beginning Balance, Shares at Dec. 31, 2019		35,275				(138)
Net income	8,172			8,211			(39)
Restricted stock units issued	(337)	$ 2	(331)	(8)
Restricted stock units issued, Shares		230
Share based compensation earned	1,758		1,758
Adjustment for minimum pension liability, net of tax	(2,247)				(2,247)
Translation gain (loss)	2,256				2,256
Noncontrolling interest distribution/acquired	(992)						992
Minimum pension liability adjustment beginning balance at Dec. 31, 2019	(6,429)
Accumulated other comprehensive loss, beginning balance at Dec. 31, 2019	(14,505)
Accumulated other comprehensive loss, activity	9
Minimum pension liability adjustment ending balance at Dec. 31, 2020	(8,676)
Accumulated other comprehensive loss, ending balance at Dec. 31, 2020	(14,496)
Ending Balance at Dec. 31, 2020	203,611	$ 355	255,296	(38,141)	(14,496)	$ (356)	953
Ending Balance, Shares at Dec. 31, 2020		35,505				(138)
Translation loss gain	5,820
Net income	1,983			1,426			557
Exercise of stock options	$ 13		13
Exercise of stock options and dividend reinvestment issuances, Shares	2,000	2
Restricted stock units issued	$ (514)	$ (3)	(517)
Restricted stock units issued, Shares		263
Share based compensation earned	3,558		3,558
Share based compensation earned, Shares		39
Common stock repurchase and retirement, Amount	(5,013)	$ (8)	(5,361)			$ 356	0
Common stock repurchase and retirement, Shares		(781)				138
Adjustment for minimum pension liability, net of tax	2,964				2,964
Translation gain (loss)	(538)				(538)
Noncontrolling interest distribution/acquired	(107)						(107)
Accumulated other comprehensive loss, activity	2,426
Minimum pension liability adjustment ending balance at Dec. 31, 2021	(5,712)
Accumulated other comprehensive loss, ending balance at Dec. 31, 2021	(12,070)
Ending Balance at Dec. 31, 2021	205,957	$ 350	252,989	(36,715)	(12,070)		1,403
Ending Balance, Shares at Dec. 31, 2021		35,028
Translation loss gain	6,358
Net income	18,263			17,417			846
Exercise of stock options	$ 377		377
Exercise of stock options and dividend reinvestment issuances, Shares	42,000	43
Restricted stock units issued	$ (440)	$ 3	(443)
Restricted stock units issued, Shares		286
Share based compensation earned	4,262	$ 1	4,261
Share based compensation earned, Shares		57
Common stock repurchase and retirement, Amount	(7,020)	$ (10)	(7,010)
Common stock repurchase and retirement, Shares		(1,032)
Adjustment for minimum pension liability, net of tax	(291)				291
Translation gain (loss)	(5,635)				(5,635)
Noncontrolling interest distribution/acquired	(1,425)						(1,425)
Accumulated other comprehensive loss, activity	(5,926)
Minimum pension liability adjustment ending balance at Dec. 31, 2022	(6,003)
Accumulated other comprehensive loss, ending balance at Dec. 31, 2022	(17,996)
Fair value of noncontrolling interest equity issued (see Note 14)	4,100						4,100
Ending Balance at Dec. 31, 2022	218,148	$ 344	$ 250,174	$ (19,298)	$ (17,996)		$ 4,924
Ending Balance, Shares at Dec. 31, 2022		34,382
Translation loss gain	$ 11,993