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Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Income Taxes [Abstract]        
Deferred Income Tax Expense (Benefit) $ (31,600) $ (164,014) $ (116,164)  
Deferred income tax assets [Abstract]        
Valuation allowance 16,300 $ 16,300   $ 9,200
Valuation Allowance, Deferred Tax Asset, Change in Amount $ 7,100      
Internal Revenue Service (IRS) [Member] | Minimum [Member]        
Income Tax Examination [Line Items]        
Tax years open for future examination   2011    
Internal Revenue Service (IRS) [Member] | Maximum [Member]        
Income Tax Examination [Line Items]        
Tax years open for future examination   2014