CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (Loss) Income	$ (12,497)		$ 6,146		$ (37,091)	$ 16,132
Other comprehensive income (loss):
Foreign currency exchange translation adjustments	1,920		233		(2,885)	337
Minimum pension liability, net of tax	(446)		1,739		(893)	1,090
Derivative instrument, net of tax	1,104		(17)		(1,674)	322
Other comprehensive income (loss)	2,578		1,955		(5,452)	1,749
Comprehensive (loss) income	$ (9,919)	$ (32,624)	$ 8,101	$ 9,780	$ (42,543)	$ 17,881