CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (73,725)	$ (70,513)	$ 34,944
Other comprehensive income (loss), net of tax:
Pension liability adjustment, net of taxes of $781, $11,605, and $1,285, respectively	(2,528)	19,173	(4,204)
Net gain (loss) on foreign currency translation	14,508	436	(16,237)
Unrealized (loss) on hedging activities, net of taxes of $1,304, $891, and $620, respectively	(4,343)	(2,903)	(2,096)
Other comprehensive income (loss)	7,637	16,706	(22,537)
Total comprehensive (loss) income	$ (66,088)	$ (53,807)	$ 12,407