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Income Taxes and Deferred Tax Asset/Liability (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Income Tax Disclosure [Abstract]        
Current income tax expense (benefit) $ 114   $ 252  
Income tax expense 1,413 $ 344 1,551 $ 469
Deferred tax expense $ 1,300   $ 1,299 $ 0