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Income Taxes (Summary Of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal									$ 20,629us-gaap_CurrentFederalTaxExpenseBenefit	$ 18,808us-gaap_CurrentFederalTaxExpenseBenefit	$ 15,509us-gaap_CurrentFederalTaxExpenseBenefit
State									(943)	1,781	2,259
Total current									19,686us-gaap_CurrentIncomeTaxExpenseBenefit	20,589us-gaap_CurrentIncomeTaxExpenseBenefit	17,768us-gaap_CurrentIncomeTaxExpenseBenefit
Total deferred									4,585us-gaap_DeferredIncomeTaxExpenseBenefit	4,686us-gaap_DeferredIncomeTaxExpenseBenefit	2,530us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax expense	$ 5,961us-gaap_IncomeTaxExpenseBenefit	$ 6,010us-gaap_IncomeTaxExpenseBenefit	$ 6,497us-gaap_IncomeTaxExpenseBenefit	$ 5,803us-gaap_IncomeTaxExpenseBenefit	$ 6,877us-gaap_IncomeTaxExpenseBenefit	$ 7,056us-gaap_IncomeTaxExpenseBenefit	$ 6,573us-gaap_IncomeTaxExpenseBenefit	$ 4,769us-gaap_IncomeTaxExpenseBenefit	$ 24,271us-gaap_IncomeTaxExpenseBenefit	$ 25,275us-gaap_IncomeTaxExpenseBenefit	$ 20,298us-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 income tax expense (benefit) pertaining to income (loss) from continuing operations.