CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Stock in Treasury
Beginning Balance (in shares) at Dec. 31, 2013		17,188,137
Beginning Balance at Dec. 31, 2013	$ 315,950	$ 18	$ 191,874	$ 125,867	$ 7,266	$ (9,075)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	33,649			33,649
Currency translation adjustment, net of tax	(13,961)				(13,961)
Restricted stock issued and stock based compensation under incentive plans (in shares)		24,588
Restricted stock issued and stock based compensation under incentive plans	4,678		4,678
Stock options exercised (in shares)		104,705
Stock options exercised	3,369		3,369
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	169		169
Ending Balance (in shares) at Dec. 31, 2014		17,317,430
Ending Balance at Dec. 31, 2014	343,854	$ 18	200,090	159,516	(6,695)	(9,075)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,813			12,813
Currency translation adjustment, net of tax	(13,166)				(13,166)
Restricted stock issued and stock based compensation under incentive plans (in shares)		13,143
Restricted stock issued and stock based compensation under incentive plans	4,306		4,306
Stock options exercised (in shares)		66,786
Stock options exercised	2,287		2,287
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	313		313
Repurchase of common stock (in shares)		(809,241)
Repurchase of common stock	$ (22,763)					(22,763)
Ending Balance (in shares) at Dec. 31, 2015	16,588,118	16,588,118
Ending Balance at Dec. 31, 2015	$ 327,644	$ 18	206,996	172,329	(19,861)	(31,838)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,107			11,107
Currency translation adjustment, net of tax	(4,700)				(4,700)
Restricted stock issued and stock based compensation under incentive plans (in shares)		20,925
Restricted stock issued and stock based compensation under incentive plans	5,374		5,374
Stock options exercised (in shares)		71,748
Stock options exercised	674		674
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	$ (442)		(442)
Ending Balance (in shares) at Dec. 31, 2016	16,680,791	16,680,791
Ending Balance at Dec. 31, 2016	$ 339,657	$ 18	$ 212,602	$ 183,436	$ (24,561)	$ (31,838)