Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ (34,952)	$ 11,678	$ (30,636)	$ (18,160)
Cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	(37,825)	9,164	(38,478)	(25,903)
Total other comprehensive income (loss), Tax	0	0	0	0
Other comprehensive income (loss)	(37,825)	9,164	(38,478)	(25,903)
Pension and other postretirement adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	2,188	1,725	5,579	5,396
Total other comprehensive income (loss), Tax	(525)	(455)	(1,398)	(1,417)
Other comprehensive income (loss)	1,663	1,270	4,181	3,979
Reclassification adjustments for derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	1,566	1,610	4,737	4,869
Total other comprehensive income (loss), Tax	(356)	(366)	(1,076)	(1,105)
Other comprehensive income (loss)	1,210	1,244	3,661	3,764
AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	(34,071)	12,499	(28,162)	(15,638)
Total other comprehensive income (loss), Tax	(881)	(821)	(2,474)	(2,522)
Other comprehensive income (loss)	$ (34,952)	$ 11,678	$ (30,636)	$ (18,160)