Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
Federal	$ 14,720us-gaap_CurrentFederalTaxExpenseBenefit	$ 16,812us-gaap_CurrentFederalTaxExpenseBenefit	$ 14,856us-gaap_CurrentFederalTaxExpenseBenefit
State	3,031	2,920	2,885
Current Income Tax Expense (Benefit)	17,751us-gaap_CurrentIncomeTaxExpenseBenefit	19,732us-gaap_CurrentIncomeTaxExpenseBenefit	17,741us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred
Federal	3,154	218	2,396
State	501	163	291
Deferred Income Tax Expense (Benefit)	3,655us-gaap_DeferredIncomeTaxExpenseBenefit	381us-gaap_DeferredIncomeTaxExpenseBenefit	2,687us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax expense	$ 21,406us-gaap_IncomeTaxExpenseBenefit	$ 20,113us-gaap_IncomeTaxExpenseBenefit	$ 20,428us-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.