Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Details)

v3.6.0.2
Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Tax Expense (Benefit), Continuing Operations [Abstract]      
Federal statutory income tax rate 35.00% 35.00% 35.00%
Cash paid for income taxes $ 310 $ 390  
Income tax refund received 7,796 90 $ 3,000
Current income tax receivables 11,943    
Non-current income tax receivables 52,097    
Increase in valuation allowance $ 52,900 $ 232,900  
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    
Tax Year 2015      
Income Tax Expense (Benefit), Continuing Operations [Abstract]      
Income tax refund received related to NOL claim $ 5,800