Income Taxes (Schedule Of Provisions Of Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	$ 32,142us-gaap_CurrentFederalTaxExpenseBenefit	$ 23,430us-gaap_CurrentFederalTaxExpenseBenefit	$ 17,483us-gaap_CurrentFederalTaxExpenseBenefit
State	6,142	4,129	3,647
Total current provision	38,284us-gaap_CurrentIncomeTaxExpenseBenefit	27,559us-gaap_CurrentIncomeTaxExpenseBenefit	21,130us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	(4,545)	68	(298)
State	(948)	201	(370)
Total deferred provision	(5,493)us-gaap_DeferredIncomeTaxExpenseBenefit	269us-gaap_DeferredIncomeTaxExpenseBenefit	(668)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for income taxes	$ 32,791us-gaap_IncomeTaxExpenseBenefit	$ 27,828us-gaap_IncomeTaxExpenseBenefit	$ 20,462us-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.