CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 4,158	$ 4,575	$ 16,114	$ 15,022
Other comprehensive income:
Foreign currency translation adjustments	(7,840)	2,772	(7,843)	1,774
Pension liability adjustment, net of tax	1,199	166	1,422	497
Comprehensive income	$ (2,483)	$ 7,513	$ 9,693	$ 17,293