Income Taxes (Components Of The Provision For 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	$ 123,598us-gaap_CurrentFederalTaxExpenseBenefit	$ 74,202us-gaap_CurrentFederalTaxExpenseBenefit	$ 74,074us-gaap_CurrentFederalTaxExpenseBenefit
State	15,858	15,635	11,890
Total current income tax expense (benefit)	139,456us-gaap_CurrentIncomeTaxExpenseBenefit	89,837us-gaap_CurrentIncomeTaxExpenseBenefit	85,964us-gaap_CurrentIncomeTaxExpenseBenefit
Federal	21,542	28,593	14,978
State	4,002	4,143	2,704
Total deferred income tax expense (benefit)	25,544us-gaap_DeferredIncomeTaxExpenseBenefit	32,736us-gaap_DeferredIncomeTaxExpenseBenefit	17,682us-gaap_DeferredIncomeTaxExpenseBenefit
Total provision for income taxes	$ 165,000us-gaap_IncomeTaxExpenseBenefit	$ 122,573us-gaap_IncomeTaxExpenseBenefit	$ 103,646us-gaap_IncomeTaxExpenseBenefit

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

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

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

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

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

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.