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Income Taxes (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Income Taxes [Abstract]      
Income tax (benefit) expense $ (1,278,000) $ 4,628,000  
Effective income tax rate 20.30% 36.20%  
Corporate tax rate 21.00%   35.00%