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Accumulated Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning Balance $ 174,099 $ 547,229
Ending Balance 139,759 420,448
Cumulative Foreign Currency Translation Adjustments    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning Balance (16,686) (23,799)
Other comprehensive income (loss) before reclassifications 3,977 (28,158)
Net other comprehensive income (loss) 3,977 (28,158)
Ending Balance (12,709) (51,957)
Unrecognized Net Actuarial Loss and Prior Service Credit, Net    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning Balance (13,955) (11,900)
Amounts reclassified from AOCI, net of tax 121 314
Net other comprehensive income (loss) 121 314
Ending Balance (13,834) (11,586)
Accumulated Other Comprehensive Income (Loss)    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning Balance (30,641) (35,699)
Other comprehensive income (loss) before reclassifications 3,977 (28,158)
Amounts reclassified from AOCI, net of tax 121 314
Net other comprehensive income (loss) 4,098 (27,844)
Ending Balance $ (26,543) $ (63,543)