Accumulated Other Comprehensive (Loss) Income Components and Activity in Accumulated Other Comprehensive (Loss) Income Net of Deferred Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 3,942,604	$ 3,401,313	$ 1,488,635
Other comprehensive income (loss) before reclassifications	185,612	(76,113)	(362,910)
Amounts reclassified from accumulated other comprehensive loss	2,019	84,371	2,144
Total other comprehensive income (loss), net of tax	187,631	8,258	(360,766)
Other comprehensive income attributable to noncontrolling interests	(887)	618	1,891
Ending balance	3,817,696	3,942,604	3,401,313
Foreign Currency Translation
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(484,121)	(463,914)	(52,835)
Other comprehensive income (loss) before reclassifications	227,439	(102,246)	(412,997)
Amounts reclassified from accumulated other comprehensive loss	0	81,421	27
Total other comprehensive income (loss), net of tax	227,439	(20,825)	(412,970)
Other comprehensive income attributable to noncontrolling interests	(887)	618	1,891
Ending balance	(257,569)	(484,121)	(463,914)
Pension and Postretirement Benefits
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	76	(758)	0
Other comprehensive income (loss) before reclassifications	0	0	(774)
Amounts reclassified from accumulated other comprehensive loss	(97)	834	16
Total other comprehensive income (loss), net of tax	(97)	834	(758)
Other comprehensive income attributable to noncontrolling interests	0	0	0
Ending balance	(21)	76	(758)
Net Investment Hedge
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	88,378	62,245	11,384
Other comprehensive income (loss) before reclassifications	(41,827)	26,133	50,861
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Total other comprehensive income (loss), net of tax	(41,827)	26,133	50,861
Other comprehensive income attributable to noncontrolling interests	0	0	0
Ending balance	46,551	88,378	62,245
Interest Rate Swap
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(16,745)	(18,861)	(20,962)
Other comprehensive income (loss) before reclassifications	0	0	0
Amounts reclassified from accumulated other comprehensive loss	2,116	2,116	2,101
Total other comprehensive income (loss), net of tax	2,116	2,116	2,101
Other comprehensive income attributable to noncontrolling interests	0	0	0
Ending balance	(14,629)	(16,745)	(18,861)
Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(412,412)	(421,288)	(62,413)
Total other comprehensive income (loss), net of tax	186,744	8,876	(358,875)
Ending balance	$ (225,668)	$ (412,412)	$ (421,288)