Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Rate	Dec. 31, 2012 Rate	Dec. 31, 2011 Rate
Income Tax Disclosure [Abstract]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ (561,719)	$ 837,520	$ 596,068
Net Income Attributable to Noncontrolling Interest	(38,865)	(50,537)	(47,425)
Income loss from continuing operations before tax	(600,584)	786,983	548,643
U.S. federal statutory tax rate	35.00%	35.00%	35.00%
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	210,204	(275,444)	(192,025)
Income Tax Reconciliation, State and Local Income Taxes	13,883	(8,206)	(5,576)
Income Tax Reconciliation, Other Adjustments	(12,312)	(6,838)	9,323
Income Tax Expense (Benefit)	$ 211,775	$ (290,488)	$ (188,278)
Effective Income Tax Rate, Continuing Operations	35.00%	37.00%	34.00%