Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current:
Federal	$ 25,285us-gaap_CurrentFederalTaxExpenseBenefit	$ 26,390us-gaap_CurrentFederalTaxExpenseBenefit	$ 36,028us-gaap_CurrentFederalTaxExpenseBenefit
State	4,490	4,582	8,333
Total current	29,775us-gaap_CurrentIncomeTaxExpenseBenefit	30,972us-gaap_CurrentIncomeTaxExpenseBenefit	44,361us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred:
Federal	141	(18,387)	(608)
State	344	(1,726)	(708)
Total deferred	485us-gaap_DeferredIncomeTaxExpenseBenefit	(20,113)us-gaap_DeferredIncomeTaxExpenseBenefit	(1,316)us-gaap_DeferredIncomeTaxExpenseBenefit
Total provision for income taxes	$ 30,260us-gaap_IncomeTaxExpenseBenefit	$ 10,859us-gaap_IncomeTaxExpenseBenefit	$ 43,045us-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.