CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Issued	Common Stock in Treasury	Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2019		24,118
Beginning Balance at Dec. 31, 2019	$ 274,399	$ 241	$ (277,817)	$ 288,338	$ (22,781)	$ 286,418
Beginning balance (in shares) at Dec. 31, 2019			(10,174)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	38,572					38,572
Currency translation adjustment	4,259				4,259
Change in foreign currency translation due to sale of Argentina subsidiary	0
Shares issued for employee benefit plan and compensation (in shares)		169
Shares issued for employee benefit plan and compensation	$ 1,136	$ 1		1,135
Purchase of treasury shares (in shares)	(444)		(444)
Purchase of treasury shares	$ (17,678)		$ (17,678)
Stock options exercised (in shares)	80	80
Stock options exercised	$ 2,805	$ 1		2,804
Shares Issued to directors (in shares)		25
Shares issued to directors	0	$ 1		(1)
Employee and director stock-based compensation	9,122			9,122
Performance-based common stock warrants	686			686
Ending balance (in shares) at Dec. 31, 2020		24,392
Ending Balance at Dec. 31, 2020	313,301	$ 244	$ (295,495)	302,084	(18,522)	324,990
Ending balance (in shares) at Dec. 31, 2020			(10,618)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,301					5,301
Currency translation adjustment	(427)				(427)
Change in foreign currency translation due to sale of Argentina subsidiary	5,425				5,425
Shares issued for employee benefit plan and compensation (in shares)		203
Shares issued for employee benefit plan and compensation	$ 1,092	$ 2		1,090
Purchase of treasury shares (in shares)	(1,243)		(1,243)
Purchase of treasury shares	$ (59,664)		$ (59,664)
Stock options exercised (in shares)	54	54
Stock options exercised	$ 1,638	$ 1		1,637
Shares Issued to directors (in shares)		30
Shares issued to directors	0	$ 0		0
Employee and director stock-based compensation	9,969			9,969
Performance-based common stock warrants	(686)			(686)
Ending balance (in shares) at Dec. 31, 2021		24,679
Ending Balance at Dec. 31, 2021	275,949	$ 247	$ (355,159)	314,094	(13,524)	330,291
Ending balance (in shares) at Dec. 31, 2021			(11,861)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	407					407
Currency translation adjustment	(7,663)				(7,663)
Change in foreign currency translation due to sale of Argentina subsidiary	0
Shares issued for employee benefit plan and compensation (in shares)		212
Shares issued for employee benefit plan and compensation	$ 1,199	$ 2		1,197
Purchase of treasury shares (in shares)	(434)		(434)
Purchase of treasury shares	$ (13,035)		$ (13,035)
Stock options exercised (in shares)	80	80
Stock options exercised	$ 1,536	$ 1		1,535
Shares Issued to directors (in shares)		29
Shares issued to directors	0	$ 0		0
Employee and director stock-based compensation	10,013			10,013
Ending balance (in shares) at Dec. 31, 2022		25,000
Ending Balance at Dec. 31, 2022	$ 268,406	$ 250	$ (368,194)	$ 326,839	$ (21,187)	$ 330,698
Ending balance (in shares) at Dec. 31, 2022			(12,295)