Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ 20,756	$ 5,108	$ (2,210)	$ 4,316
Cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	19,271	2,628	(7,185)	(653)
Total other comprehensive income (loss), Tax	0	0	0	0
Other comprehensive income (loss)	19,271	2,628	(7,185)	(653)
Pension and other postretirement adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	(569)	1,691	2,305	3,391
Total other comprehensive income (loss), Tax	(62)	(435)	(640)	(873)
Other comprehensive income (loss)	(631)	1,256	1,665	2,518
Reclassification adjustments for derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	2,739	1,583	4,284	3,171
Total other comprehensive income (loss), Tax	(623)	(359)	(974)	(720)
Other comprehensive income (loss)	2,116	1,224	3,310	2,451
AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	21,441	5,902	(596)	5,909
Total other comprehensive income (loss), Tax	(685)	(794)	(1,614)	(1,593)
Other comprehensive income (loss)	$ 20,756	$ 5,108	$ (2,210)	$ 4,316