Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Details)

v3.7.0.1
Income Taxes - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Tax Expense (Benefit), Continuing Operations [Abstract]            
Income tax benefit   $ (8,975,000) $ (35,722,000) $ (16,563,000) $ (40,604,000)  
Cash paid for income taxes       0 300,000  
Income tax refund received       0 $ 2,300,000  
Current income tax receivables   12,027,000   12,027,000   $ 11,943,000
Non-current income tax receivables   68,974,000   68,974,000   52,097,000
Valuation allowance   $ 270,400,000   $ 270,400,000   $ 290,200,000
Minimum            
Income Tax Expense (Benefit), Continuing Operations [Abstract]            
Tax years under examination       2013    
Maximum            
Income Tax Expense (Benefit), Continuing Operations [Abstract]            
Tax years under examination       2016    
Subsequent Event            
Income Tax Expense (Benefit), Continuing Operations [Abstract]            
Income tax refund received $ 11,900,000