Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ 31,318	$ 6,287	$ 104,191	$ (1,087)
AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	32,552	7,227	107,789	1,749
Total other comprehensive income (loss), Tax	(1,234)	(940)	(3,598)	(2,836)
Other comprehensive income (loss)	31,318	6,287	104,191	(1,087)
Cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	28,796	4,611	97,160	(6,215)
Total other comprehensive income (loss), Tax	0	0	0	0
Other comprehensive income (loss)	28,796	4,611	97,160	(6,215)
Pension and other postretirement adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	2,075	915	5,625	2,820
Total other comprehensive income (loss), Tax	(607)	(321)	(1,753)	(964)
Other comprehensive income (loss)	1,468	594	3,872	1,856
Reclassification adjustments for derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	1,681	1,701	5,004	5,144
Total other comprehensive income (loss), Tax	(627)	(619)	(1,845)	(1,872)
Other comprehensive income (loss)	$ 1,054	$ 1,082	$ 3,159	$ 3,272