Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Valuation Allowance [Line Items]          
Income tax provision (benefit) $ 235 $ 1,454 $ 872 $ 3,552  
Valuation allowance 60,800   60,800   $ 73,700
Liability for uncertain tax positions 5,700   5,700    
Liability for uncertain tax positions, interest and penalties accrued 800   800    
Federal          
Valuation Allowance [Line Items]          
Operating loss carryforwards 83,900   83,900   128,400
State and Local          
Valuation Allowance [Line Items]          
Operating loss carryforwards 54,200   54,200   64,800
Domestic Deferred Tax Assets          
Valuation Allowance [Line Items]          
Valuation allowance 47,500   47,500   70,900
Foreign Deferred Tax Assets          
Valuation Allowance [Line Items]          
Valuation allowance $ 13,300   $ 13,300   $ 2,800