CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 8,240	$ 5,955	$ 11,956	$ 10,447
Other comprehensive income:
Foreign currency translation adjustments	333	1,036	(3)	(998)
Pension liability adjustment, net of tax	112	166	223	331
Comprehensive income	$ 8,685	$ 7,157	$ 12,176	$ 9,780