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Income Taxes - Income Tax Provision (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Tax Disclosure [Abstract]        
Current income tax benefit $ 33 $ 94 $ 25 $ 87
Deferred income tax benefit 154 360 222 460
Total benefit $ 187 $ 454 $ 247 $ 547