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.

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
Current
Federal									$ 21,860us-gaap_CurrentFederalTaxExpenseBenefit	$ 18,377us-gaap_CurrentFederalTaxExpenseBenefit	$ 12,718us-gaap_CurrentFederalTaxExpenseBenefit
State									8,118	7,007	5,522
Total current income tax expense									29,978us-gaap_CurrentIncomeTaxExpenseBenefit	25,384us-gaap_CurrentIncomeTaxExpenseBenefit	18,240us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred
Federal									5,016	3,918	708
State									915	715	129
Total deferred income tax expense									5,931us-gaap_DeferredIncomeTaxExpenseBenefit	4,633us-gaap_DeferredIncomeTaxExpenseBenefit	837us-gaap_DeferredIncomeTaxExpenseBenefit
Total income tax expense	$ 8,846us-gaap_IncomeTaxExpenseBenefit	$ 9,800us-gaap_IncomeTaxExpenseBenefit	$ 8,350us-gaap_IncomeTaxExpenseBenefit	$ 8,913us-gaap_IncomeTaxExpenseBenefit	$ 8,630us-gaap_IncomeTaxExpenseBenefit	$ 8,315us-gaap_IncomeTaxExpenseBenefit	$ 5,927us-gaap_IncomeTaxExpenseBenefit	$ 7,145us-gaap_IncomeTaxExpenseBenefit	$ 35,909us-gaap_IncomeTaxExpenseBenefit	$ 30,017us-gaap_IncomeTaxExpenseBenefit	$ 19,077us-gaap_IncomeTaxExpenseBenefit