CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Stock in Treasury
Beginning Balance at Dec. 31, 2011	$ 247,898	$ 17	$ 169,780	$ 81,360	$ 5,816	$ (9,075)
Beginning Balance (in shares) at Dec. 31, 2011		16,700,875
Net income	22,998			22,998
Currency translation adjustment, net of tax	525				525
Restricted stock issued and stock based compensation under incentive plans (in shares)		14,339
Restricted stock issued and stock based compensation under incentive plans	4,018		4,018
Stock options exercised (in shares)		258,430
Stock options exercised	6,162	1	6,161
Income tax benefit from exercise of stock options	1,135		1,135
Ending Balance at Dec. 31, 2012	282,736	18	181,094	104,358	6,341	(9,075)
Ending Balance (in shares) at Dec. 31, 2012		16,973,644
Net income	21,509			21,509
Currency translation adjustment, net of tax	925				925
Restricted stock issued and stock based compensation under incentive plans (in shares)		17,441
Restricted stock issued and stock based compensation under incentive plans	4,367		4,367
Stock options exercised (in shares)		197,052
Stock options exercised	5,444		5,444
Income tax benefit from exercise of stock options	969		969
Ending Balance at Dec. 31, 2013	315,950	18	191,874	125,867	7,266	(9,075)
Ending Balance (in shares) at Dec. 31, 2013		17,188,137
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	104,705
Stock options exercised	3,369		3,369
Income tax benefit from exercise of stock options	169		169
Ending Balance at Dec. 31, 2014	$ 343,854	$ 18	$ 200,090	$ 159,516	$ (6,695)	$ (9,075)
Ending Balance (in shares) at Dec. 31, 2014		17,317,430