Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Details)

v3.5.0.2
Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Income Tax Expense (Benefit), Continuing Operations [Abstract]        
Income tax benefit $ (3,789) $ (18,520) $ (44,393) $ (166,228)
Effective tax rate   3.70% 14.30% 14.30%
Federal statutory income tax rate     35.00%  
Increase (decrease) in valuation allowance (19,100) $ 156,200 $ 63,100 $ 241,600
Income tax refund received 5,600      
Non-current income tax receivables $ 52,097   $ 52,097  
Minimum        
Income Tax Expense (Benefit), Continuing Operations [Abstract]        
Tax years under examination     2012  
Maximum        
Income Tax Expense (Benefit), Continuing Operations [Abstract]        
Tax years under examination     2015