CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (70,513)	$ 34,944	$ 49,317
Other comprehensive income (loss):
Pension liability adjustment, net of income taxes of $11,605, $1,285, and $409, respectively	19,173	(4,204)	2,016
Foreign currency translation adjustments	436	(16,237)	25,664
Unrealized (loss) gain on hedging activities, net of tax	(2,903)	(2,096)	122
Total other comprehensive income (loss), net of tax	16,706	(22,537)	27,802
Comprehensive (loss) income	$ (53,807)	$ 12,407	$ 77,119