Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2018
Retirement Benefits [Abstract]
Defined Contribution Plan, Cost	$ 2,144	$ 1,895	$ 1,157
Liability, Defined Benefit Plan	738	$ 755
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	$ 42
Defined Benefit Plan, Funded Percentage				83.27%