Income Tax Income Tax (Provision for Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 49,048	$ 81,135	$ 188,318	$ 256,126
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	(96)	(3,645)	(5,685)	(11,715)
Income Tax Reconciliation Foreign Income Tax Basis Differential	(16,221)	(413)	(29,822)	(3,727)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	10,239	326	21,997	(322)
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Amount	(2,580)	(2,083)	(675)	(527)
Income Tax Reconciliation Change In Foreign Enacted Tax Rate	0	(26)	58	(386)
Income Tax Reconciliation SubpartF	12,188	4,426	30,074	10,555
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	(1,106)	(1,558)	(4,554)	(3,568)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	3,747	(4,794)	(1,774)	(8,031)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	1,384	451	1,076	429
Income Tax Expense (Benefit)	$ 56,603	$ 73,819	$ 199,013	$ 238,834
Effective Income Tax Rate Reconciliation, Percent	40.40%	31.80%	37.00%	32.60%