Accumulated Other Comprehensive Loss, Net of Tax (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 950,826
Other comprehensive income (loss) before reclassifications	3,871
Amounts reclassified from accumulated other comprehensive loss, net of tax	5,997
Tax benefit (expense)	(1,067)
Ending balance	992,786
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(71,187)
Other comprehensive income (loss) before reclassifications	4,740
Amounts reclassified from accumulated other comprehensive loss, net of tax	0
Tax benefit (expense)	0
Ending balance	(66,447)
Gains (Losses) on Derivative Instruments | Foreign Exchange Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	2,901
Other comprehensive income (loss) before reclassifications	1,119
Amounts reclassified from accumulated other comprehensive loss, net of tax	(4,484)
Tax benefit (expense)	998
Ending balance	534
Gains (Losses) on Derivative Instruments | Interest Rate Swap Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2,003)
Other comprehensive income (loss) before reclassifications	(2,219)
Amounts reclassified from accumulated other comprehensive loss, net of tax	2,346
Tax benefit (expense)	(31)
Ending balance	(1,907)
Pension and Other Postretirement Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(41,739)
Other comprehensive income (loss) before reclassifications	231
Amounts reclassified from accumulated other comprehensive loss, net of tax	8,135
Tax benefit (expense)	(2,034)
Ending balance	(35,407)
Accumulated Other Comprehensive Loss, Net of Tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(112,028)
Ending balance	$ (103,227)