Accumulated Other Comprehensive (Loss) Income - Components and Activity in Accumulated Other Comprehensive (Loss) Income Net of Deferred Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 3,759,108	$ 3,817,696
Other comprehensive (loss) income, before reclassifications	(7,551)	50,470
Amounts reclassified from accumulated other comprehensive loss	648	645
Total other comprehensive (loss) income, net of tax	(6,903)	51,115
Other comprehensive (loss) income attributable to noncontrolling interests	47	(186)
Ending Balance	3,864,039	3,943,430
Foreign Currency Translation
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(407,646)	(257,569)
Other comprehensive (loss) income, before reclassifications	(10,855)	64,891
Amounts reclassified from accumulated other comprehensive loss	0	0
Total other comprehensive (loss) income, net of tax	(10,855)	64,891
Other comprehensive (loss) income attributable to noncontrolling interests	47	(186)
Ending Balance	(418,454)	(192,864)
Pension and Postretirement Benefits
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(159)	(21)
Other comprehensive (loss) income, before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	7	3
Total other comprehensive (loss) income, net of tax	7	3
Other comprehensive (loss) income attributable to noncontrolling interests	0	0
Ending Balance	(152)	(18)
Net Investment Hedge
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	72,337	46,551
Other comprehensive (loss) income, before reclassifications	3,304	(14,421)
Amounts reclassified from accumulated other comprehensive loss	0	0
Total other comprehensive (loss) income, net of tax	3,304	(14,421)
Other comprehensive (loss) income attributable to noncontrolling interests	0	0
Ending Balance	75,641	32,130
Interest Rate Swap
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(15,214)	(14,629)
Other comprehensive (loss) income, before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	641	642
Total other comprehensive (loss) income, net of tax	641	642
Other comprehensive (loss) income attributable to noncontrolling interests	0	0
Ending Balance	(14,573)	(13,987)
Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(350,682)	(225,668)
Total other comprehensive (loss) income, net of tax	(6,856)	50,929
Ending Balance	$ (357,538)	$ (174,739)