Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Income [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2011	$ 135,799	$ 38	$ 71,720	$ 65,658	$ (1,617)
Beginning Balance, Shares at Dec. 31, 2011		38,193
Net income	15,599	0	0	15,599	0
Foreign currency translation adjustment	1,677	0	0	0	1,677
Exercise of stock options	441	0	441	0	0
Exercise of stock options, Shares		444
Restricted stock awards	2,804	1	2,803	0	0
Restricted stock awards, Shares		568
Ending Balance at Dec. 31, 2012	156,320	39	74,965	81,256	60
Ending Balance, Shares at Dec. 31, 2012		39,205
Net income	11,147	0	0	11,147	0
Foreign currency translation adjustment	1,903	0	0	(3)	1,906
Exercise of stock options	114	0	114	0	0
Exercise of stock options, Shares		163
Restricted stock awards	2,473	1	2,472	0	0
Restricted stock awards, Shares		251
Tax payments for stock issuances	(998)	0	(998)	0	0
Tax benefit of stock based compensation	3,318	0	3,318	0	0
Ending Balance at Dec. 31, 2013	174,278	40	79,871	92,401	1,966
Ending Balance, Shares at Dec. 31, 2013		39,619
Net income	33,484	0	0	33,484	0
Foreign currency translation adjustment	(4,468)	0	0		(4,468)
Exercise of stock options	51	0	51	0	0
Exercise of stock options, Shares	20	20
Restricted stock awards	2,399	0	2,399	0	0
Restricted stock awards, Shares		21
Tax payments for stock issuances	(123)	0	(123)	0	0
Tax benefit of stock based compensation	253	0	253	0	0
Ending Balance at Dec. 31, 2014	$ 205,873	$ 40	$ 82,450	$ 125,885	$ (2,502)
Ending Balance, Shares at Dec. 31, 2014		39,660