Income Taxes - Income tax expense (benefit) from continuing operations (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
Federal	$ 8,298us-gaap_CurrentFederalTaxExpenseBenefit	$ 13,273us-gaap_CurrentFederalTaxExpenseBenefit	$ 11,871us-gaap_CurrentFederalTaxExpenseBenefit
Foreign	(277)us-gaap_CurrentForeignTaxExpenseBenefit	629us-gaap_CurrentForeignTaxExpenseBenefit	339us-gaap_CurrentForeignTaxExpenseBenefit
State and local	(234)	2,170	2,876
Current Income Tax Expense (Benefit)	7,787us-gaap_CurrentIncomeTaxExpenseBenefit	16,072us-gaap_CurrentIncomeTaxExpenseBenefit	15,086us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred
Federal	(1,208)	(1,413)	896
Foreign	(710)	(920)	(389)
State and local	(747)	(396)	96
Deferred Income Tax Expense (Benefit)	$ (2,665)us-gaap_DeferredIncomeTaxExpenseBenefit	$ (2,729)us-gaap_DeferredIncomeTaxExpenseBenefit	$ 603us-gaap_DeferredIncomeTaxExpenseBenefit

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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