Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Details)

v3.3.0.814
Income Taxes - Additional Information (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
Income Tax Expense (Benefit), Continuing Operations [Abstract]          
Income tax expense (benefit) $ (18,520) $ 904 $ (166,228) $ 12,825  
Effective tax rate 3.70%   14.30% 37.10%  
Federal statutory income tax rate     35.00%    
Valuation allowance $ 156,200   $ 241,600    
Louisiana          
Income Tax Expense (Benefit), Continuing Operations [Abstract]          
Valuation allowance related to net operating losses $ 4,300   $ 4,300   $ 4,300
Minimum | State Tax Jurisdiction          
Income Tax Expense (Benefit), Continuing Operations [Abstract]          
Tax years under examination     2011    
Minimum | Federal          
Income Tax Expense (Benefit), Continuing Operations [Abstract]          
Tax years under examination     2012    
Maximum | State Tax Jurisdiction          
Income Tax Expense (Benefit), Continuing Operations [Abstract]          
Tax years under examination     2014    
Maximum | Federal          
Income Tax Expense (Benefit), Continuing Operations [Abstract]          
Tax years under examination     2014