CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (Loss) Income	$ 4,178			$ 7,180			$ (32,913)	$ 23,312
Other comprehensive (loss) income:
Foreign currency exchange translation adjustments	2,628			(3,388)			(257)	(3,051)
Minimum pension liability, net of tax	(957)			(2,095)			(1,850)	(1,005)
Derivative instrument, net of tax	893			(515)			(781)	(193)
Other comprehensive (loss) income	2,564			(5,998)			(2,888)	(4,249)
Comprehensive (loss) income	$ 6,742	$ (9,919)	$ (32,624)	$ 1,182	$ 8,101	$ 9,780	$ (35,801)	$ 19,063