Income Taxes (Schedule Of The Provision For (Benefit From) Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal, Current	$ 300,610us-gaap_CurrentFederalTaxExpenseBenefit	$ 215,903us-gaap_CurrentFederalTaxExpenseBenefit	$ 190,917us-gaap_CurrentFederalTaxExpenseBenefit
State	37,351	22,249	15,327
Foreign, Current	1,974us-gaap_CurrentForeignTaxExpenseBenefit	(137)us-gaap_CurrentForeignTaxExpenseBenefit	(837)us-gaap_CurrentForeignTaxExpenseBenefit
Total Current	339,935us-gaap_CurrentIncomeTaxExpenseBenefit	238,015us-gaap_CurrentIncomeTaxExpenseBenefit	205,407us-gaap_CurrentIncomeTaxExpenseBenefit
Federal, Deferred	40,950	94,471	(5,398)
State, Deferred	22,714	(556)	(519)
Foreign, Deferred	(4,697)	(183)	124
Total Deferred	58,967us-gaap_DeferredIncomeTaxExpenseBenefit	93,732us-gaap_DeferredIncomeTaxExpenseBenefit	(5,793)us-gaap_DeferredIncomeTaxExpenseBenefit
Total provision	$ 398,902us-gaap_IncomeTaxExpenseBenefit	$ 331,747us-gaap_IncomeTaxExpenseBenefit	$ 199,614us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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