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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Income Tax Disclosure [Abstract]          
Current $ 0 $ (68) $ 0 $ (154)  
Deferred (2,869) (837) 178 (2,582)  
Income tax (expense) benefit (2,869) $ (905) 178 $ (2,736)  
Net deferred tax assets $ 44,964   $ 44,964   $ 38,301