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Income Taxes (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									$ 9,198us-gaap_CurrentFederalTaxExpenseBenefit	$ 7,751us-gaap_CurrentFederalTaxExpenseBenefit	$ 7,862us-gaap_CurrentFederalTaxExpenseBenefit
State and local									144	9	(50)
Deferred									(179)us-gaap_DeferredIncomeTaxExpenseBenefit	1,518us-gaap_DeferredIncomeTaxExpenseBenefit	200us-gaap_DeferredIncomeTaxExpenseBenefit
Totals	$ 1,957us-gaap_IncomeTaxExpenseBenefit	$ 2,773us-gaap_IncomeTaxExpenseBenefit	$ 2,254us-gaap_IncomeTaxExpenseBenefit	$ 2,179us-gaap_IncomeTaxExpenseBenefit	$ 1,992us-gaap_IncomeTaxExpenseBenefit	$ 2,445us-gaap_IncomeTaxExpenseBenefit	$ 2,535us-gaap_IncomeTaxExpenseBenefit	$ 2,306us-gaap_IncomeTaxExpenseBenefit	$ 9,163us-gaap_IncomeTaxExpenseBenefit	$ 9,278us-gaap_IncomeTaxExpenseBenefit	$ 8,012us-gaap_IncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to 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.