Accumulated Other Comprehensive Loss, Net of Tax (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 950,826
Other comprehensive income (loss) before reclassifications	(2,810)
Amounts reclassified from accumulated other comprehensive loss, net of tax	4,901
Tax benefit (expense)	(1,636)
Ending balance	932,971
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	(75,927)
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	3,830
Amounts reclassified from accumulated other comprehensive loss, net of tax	(2,223)
Tax benefit (expense)	(389)
Ending balance	4,119
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	(2,222)
Amounts reclassified from accumulated other comprehensive loss, net of tax	1,380
Tax benefit (expense)	204
Ending balance	(2,641)
Pension and Other Postretirement Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(41,739)
Other comprehensive income (loss) before reclassifications	322
Amounts reclassified from accumulated other comprehensive loss, net of tax	5,744
Tax benefit (expense)	(1,451)
Ending balance	(37,124)
Accumulated Other Comprehensive Loss, Net of Tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(112,028)
Ending balance	$ (111,573)