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Employee Benefit Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Sep. 30, 2017
Employee Benefit Plans [Abstract]          
401 (k) Matching Expenses $ 485 $ 315 $ 914 $ 459  
Unfunded Benefit Liability $ 775   $ 775   $ 815