CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 46,259	$ 21,847	$ 19,155
Other comprehensive (loss) income:
Change in pension plans, net of income taxes of $55, $1,595, and $4,028, respectively	(90)	(2,603)	6,572
Foreign currency translation adjustments	(10,334)	(12,714)	2,950
Total other comprehensive (loss) income, net of tax	(10,424)	(15,317)	9,522
Comprehensive income	$ 35,835	$ 6,530	$ 28,677