Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Current Federal Tax Expense (Benefit)	$ 82,532	$ 101,857	$ 85,173
Current State and Local Tax Expense (Benefit)	18,022	20,123	15,845
Current International Tax Expense (Benefit)	85,310	88,707	81,052
Current Income Tax Expense (Benefit)	185,864	210,687	182,070
Deferred Federal Income Tax Expense (Benefit)	12,127	(1,097)	22,973
Deferred State and Local Income Tax Expense (Benefit)	(1,828)	(2,071)	2,438
Deferred International Income Tax Expense (Benefit)	(4,466)	(22,576)	(25,138)
Deferred income taxes	5,833	(25,744)	273
Provision for income taxes	$ 191,697	$ 184,943	$ 182,343