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, 2017	Mar. 31, 2016
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance		$ 3,942,604	$ 3,401,313
Other comprehensive income (loss), before reclassifications		65,370	89,382
Amounts reclassified from accumulated other comprehensive loss		522	526
Total other comprehensive income, net of tax		65,892	89,908
Other comprehensive income attributable to noncontrolling interests		(461)	(283)
Ending Balance		3,783,972	3,694,871
Foreign Currency Translation
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance		(484,121)	(463,914)
Other comprehensive income (loss), before reclassifications		79,055	98,906
Amounts reclassified from accumulated other comprehensive loss		0	0
Total other comprehensive income, net of tax		79,055	98,906
Other comprehensive income attributable to noncontrolling interests		(461)	(283)
Ending Balance		(405,527)	(365,291)
Pension and Postretirement Benefits
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance		76	(758)
Other comprehensive income (loss), before reclassifications		0	0
Amounts reclassified from accumulated other comprehensive loss	[1]	(7)	1
Total other comprehensive income, net of tax		(7)	1
Other comprehensive income attributable to noncontrolling interests		0	0
Ending Balance		69	(757)
Net Investment Hedge
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance		88,378	62,245
Other comprehensive income (loss), before reclassifications		(13,685)	(9,524)
Amounts reclassified from accumulated other comprehensive loss		0	0
Total other comprehensive income, net of tax		(13,685)	(9,524)
Other comprehensive income attributable to noncontrolling interests		0	0
Ending Balance		74,693	52,721
Interest Rate Swap
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance		(16,745)	(18,861)
Other comprehensive income (loss), before reclassifications		0	0
Amounts reclassified from accumulated other comprehensive loss	[2]	529	525
Total other comprehensive income, net of tax		529	525
Other comprehensive income attributable to noncontrolling interests		0	0
Ending Balance		(16,216)	(18,336)
Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance		(412,412)	(421,288)
Total other comprehensive income, net of tax		65,431	89,625
Ending Balance		$ (346,981)	$ (331,663)

[1] The pre-tax portion of amounts reclassified from accumulated other comprehensive loss consists of amortization of prior service benefit, which is a component of pension and postretirement benefits cost (credit). See Note 13, “Pension Plans and Other Postretirement Benefits.”

[2] The pre-tax portion of amounts reclassified from accumulated other comprehensive loss is included in interest expense.