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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Income Tax Disclosure [Abstract]          
Current $ 0 $ 0 $ 0 $ 0  
Deferred (514) 283 (1,831) 1,218  
Income tax (expense) benefit (514) $ 283 (1,831) $ 1,218  
Net deferred tax assets $ 37,103   $ 37,103   $ 38,847