CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 10,817	$ 8,240	$ 29,754	$ 11,956
Other comprehensive income:
Foreign currency translation adjustments	3,932	333	(5,987)	(3)
Pension liability adjustment, net of tax	137	112	274	223
Comprehensive income	$ 14,886	$ 8,685	$ 24,041	$ 12,176