Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ 48,306	$ (34,952)	$ 46,096	$ (30,636)
Cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	47,343	(37,825)	40,158	(38,478)
Total other comprehensive income (loss), Tax	0	0	0	0
Other comprehensive income (loss)	47,343	(37,825)	40,158	(38,478)
Pension and other postretirement adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	462	2,188	2,767	5,579
Total other comprehensive income (loss), Tax	(171)	(525)	(811)	(1,398)
Other comprehensive income (loss)	291	1,663	1,956	4,181
Reclassification adjustments for derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	869	1,566	5,153	4,737
Total other comprehensive income (loss), Tax	(197)	(356)	(1,171)	(1,076)
Other comprehensive income (loss)	672	1,210	3,982	3,661
AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	48,674	(34,071)	48,078	(28,162)
Total other comprehensive income (loss), Tax	(368)	(881)	(1,982)	(2,474)
Other comprehensive income (loss)	$ 48,306	$ (34,952)	$ 46,096	$ (30,636)