CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (3,519)	$ 34,004	$ (21,067)
Other comprehensive income (loss), before tax:
Change in foreign currency translation adjustments	(25,841)	(26,674)	5,874
Unrealized loss on derivatives
Unrealized derivative losses arising during period	(25)	(206)	(110)
Less: Reclassification adjustments for losses included in net income (loss)	(923)	(1,747)	(1,830)
Unrealized gain on derivatives	898	1,541	1,720
Defined benefit pension plan
Defined benefit pension plan - net gain (loss) arising during period	904	1,672	(1,398)
Total other comprehensive income (loss), before tax	(24,039)	(23,461)	6,196
Income tax (expense) benefit related to items in other comprehensive income (loss)	(375)	(954)	(472)
Total other comprehensive income (loss), net of tax	(24,414)	(24,415)	5,724
Comprehensive income (loss), net of tax	$ (27,933)	$ 9,589	$ (15,343)