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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 3,864,039	$ 3,943,430	$ 3,759,108	$ 3,817,696
Other comprehensive income (loss), before reclassifications	7,507	(127,868)	(44)	(77,398)
Amounts reclassified from accumulated other comprehensive loss	647	665	1,295	1,310
Total other comprehensive income (loss), net of tax	8,154	(127,203)	1,251	(76,088)
Other comprehensive (income) loss attributable to noncontrolling interests	(27)	263	20	77
Ending Balance	3,974,403	3,837,280	3,974,403	3,837,280
Foreign Currency Translation
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(418,454)	(192,864)	(407,646)	(257,569)
Other comprehensive income (loss), before reclassifications	10,544	(150,857)	(311)	(85,966)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Total other comprehensive income (loss), net of tax	10,544	(150,857)	(311)	(85,966)
Other comprehensive (income) loss attributable to noncontrolling interests	(27)	263	20	77
Ending Balance	(407,937)	(343,458)	(407,937)	(343,458)
Pension and Postretirement Benefits
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(152)	(18)	(159)	(21)
Other comprehensive income (loss), before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	6	23	13	26
Total other comprehensive income (loss), net of tax	6	23	13	26
Other comprehensive (income) loss attributable to noncontrolling interests	0	0	0	0
Ending Balance	(146)	5	(146)	5
Net Investment Hedge
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	75,641	32,130	72,337	46,551
Other comprehensive income (loss), before reclassifications	(3,037)	22,989	267	8,568
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Total other comprehensive income (loss), net of tax	(3,037)	22,989	267	8,568
Other comprehensive (income) loss attributable to noncontrolling interests	0	0	0	0
Ending Balance	72,604	55,119	72,604	55,119
Interest Rate Swap
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(14,573)	(13,987)	(15,214)	(14,629)
Other comprehensive income (loss), before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive loss	641	642	1,282	1,284
Total other comprehensive income (loss), net of tax	641	642	1,282	1,284
Other comprehensive (income) loss attributable to noncontrolling interests	0	0	0	0
Ending Balance	(13,932)	(13,345)	(13,932)	(13,345)
Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(357,538)	(174,739)	(350,682)	(225,668)
Total other comprehensive income (loss), net of tax	8,127	(126,940)	1,271	(76,011)
Ending Balance	$ (349,411)	$ (301,679)	$ (349,411)	$ (301,679)