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		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 3,974,403	$ 3,837,280	$ 3,759,108	$ 3,817,696
Other comprehensive (loss) income, before reclassifications	(87,324)	(13,170)	(87,368)	(90,568)
Amounts reclassified from accumulated other comprehensive loss	636	653	1,931	1,963
Total other comprehensive loss, net of tax	(86,688)	(12,517)	(85,437)	(88,605)
Other comprehensive loss attributable to noncontrolling interests	122	5	142	82
Ending Balance	4,008,337	3,686,277	4,008,337	3,686,277
Foreign Currency Translation
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(407,937)	(343,458)	(407,646)	(257,569)
Other comprehensive (loss) income, before reclassifications	(100,069)	(9,549)	(100,380)	(95,515)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Total other comprehensive loss, net of tax	(100,069)	(9,549)	(100,380)	(95,515)
Other comprehensive loss attributable to noncontrolling interests	122	5	142	82
Ending Balance	(507,884)	(353,002)	(507,884)	(353,002)
Pension and Postretirement Benefits
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(146)	5	(159)	(21)
Other comprehensive (loss) income, before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	(5)	11	8	37
Total other comprehensive loss, net of tax	(5)	11	8	37
Other comprehensive loss attributable to noncontrolling interests	0	0	0	0
Ending Balance	(151)	16	(151)	16
Net Investment Hedge
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	72,604	55,119	72,337	46,551
Other comprehensive (loss) income, before reclassifications	12,745	(3,621)	13,012	4,947
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Total other comprehensive loss, net of tax	12,745	(3,621)	13,012	4,947
Other comprehensive loss attributable to noncontrolling interests	0	0	0	0
Ending Balance	85,349	51,498	85,349	51,498
Interest Rate Swap
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(13,932)	(13,345)	(15,214)	(14,629)
Other comprehensive (loss) income, before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	641	642	1,923	1,926
Total other comprehensive loss, net of tax	641	642	1,923	1,926
Other comprehensive loss attributable to noncontrolling interests	0	0	0	0
Ending Balance	(13,291)	(12,703)	(13,291)	(12,703)
Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(349,411)	(301,679)	(350,682)	(225,668)
Total other comprehensive loss, net of tax	(86,566)	(12,512)	(85,295)	(88,523)
Ending Balance	$ (435,977)	$ (314,191)	$ (435,977)	$ (314,191)