Accumulated Other Comprehensive (Loss) Income Amount of Income Tax (Expense) Benefit Allocated to Component of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Equity [Abstract]
Foreign Currency Translation, Other comprehensive income (loss), before tax	$ 80,141	$ 99,277
Foreign Currency Translation, Income tax (expense) benefit	(1,086)	(371)
Foreign Currency Translation, Other comprehensive income (loss), net of tax	79,055	98,906
Pension and Postretirement Benefits, Other comprehensive income (loss), before tax	(6)	4
Pension and Postretirement Benefits, Income tax (expense) benefit	(1)	(3)
Pension and Postretirement Benefits, Other comprehensive income (loss), net of tax	(7)	1
Net investment hedge, Other comprehensive income (loss), before tax	(21,580)	(15,121)
Net investment hedge, Income tax (expense) benefit	7,895	5,597
Net investment hedge, Other comprehensive income (loss), net of tax	(13,685)	(9,524)
Interest rate swap, Other comprehensive income (loss), before tax	834	834
Interest rate swap, Income tax benefit (expense) benefit	(305)	(309)
Interest rate swap, Other comprehensive income (loss), net of tax	$ 529	$ 525