Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Net income	$ 26,002	$ 29,962	$ 24,505
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(9,292)	2,791	(2,240)
Pension liability, net of tax of $605 in 2013, $80 in 2012 and $339 in 2011	1,076	558	(630)
Total other comprehensive income (loss), net of tax	(8,216)	3,349	(2,870)
Comprehensive income	$ 17,786	$ 33,311	$ 21,635