Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details 2)

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Income Taxes (Details 2) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Income taxes    
Unrecognized tax benefits that would impact effective tax rate, if recognized $ 1,870  
Reasonably possible decrease in liability for unrecognized tax benefits in the next twelve months 1,614  
Accrued interest and penalties on unrecognized tax benefits 423 $ 594
Accrued expenses and other non-current liabilities    
Income taxes    
Liability for unrecognized tax benefits 1,994 $ 2,092
Prepaid Expenses and Other Current Assets    
Income taxes    
Stock Based Compensation, Excess Tax Benefits $ 16,303