Income Tax (Reconciliation of the Amount of Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits Beginning balance, January 1	$ 274,661	$ 279,801	$ 245,636
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	26,170	17,431	41,228
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(7,820)	(26,001)	(10,401)
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	3,396	3,430	3,338
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	(194)	0	0
Unrecognized Tax Benefits Ending balance, December 31	$ 296,213	$ 274,661	$ 279,801