Income Tax Income Tax (Provision for Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 81,135	$ 70,593	$ 256,126	$ 142,017
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	(3,645)	(4,562)	(11,715)	(6,603)
Income Tax Reconciliation Foreign Income Tax Basis Differential	(413)	12,508	(3,727)	1,302
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	326	(9,850)	(322)	478
Effective Income Tax Rate Reconciliation, Tax Contingency, Domestic, Amount	(2,083)	1,054	(527)	1,946
Income Tax Reconciliation Change In Foreign Enacted Tax Rate	(26)	(925)	(386)	(645)
Income Tax Reconciliation SubpartF	4,426	(3,060)	10,555	3,226
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	(1,558)	3,344	(3,568)	(172)
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	(4,794)	(5,265)	(8,031)	(9,377)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	451	(97)	429	(286)
Income Tax Expense (Benefit)	$ 73,819	$ 63,740	$ 238,834	$ 131,886
Effective Income Tax Rate Reconciliation, Percent	31.80%	31.60%	32.60%	32.50%