Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (41,070)	$ (9,361)
Ending Balance	(17,180)	(41,070)
Defined Benefit Pension and Postretirement Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(7,071)	(9,153)
Other comprehensive income (loss) before reclassifications, net of tax	(1,030)	1,990
Amounts reclassified from accumulated other comprehensive loss, net of tax	99	92
Net current period other comprehensive income (loss)	(931)	2,082
Ending Balance	(8,002)	(7,071)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(6,303)	(5,195)
Other comprehensive income (loss) before reclassifications, net of tax	2,543	(1,108)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0	0
Net current period other comprehensive income (loss)	2,543	(1,108)
Ending Balance	(3,760)	(6,303)
Total
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(13,374)	(14,348)
Other comprehensive income (loss) before reclassifications, net of tax	1,513	882
Amounts reclassified from accumulated other comprehensive loss, net of tax	99	92
Net current period other comprehensive income (loss)	1,612	974
Ending Balance	$ (11,762)	$ (13,374)