Employee Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2017
Defined Contribution Plan Disclosure [Line Items]
401(k) Matching Expense	$ 1,895	$ 1,157	$ 737
Executive Saving Plan [Abstract]
Maximum percentage of salary permitted for deferral	75.00%
Post Retirement Benefit Plan [Abstract]
Defined Benefit Plan, Percentage Vest After Ten Years Of Service	50.00%
Denfied Benefits Plan, Annual Percentage Vested	10.00%
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Aggregate Benefit Obligation	$ 755	$ 815
Expense Related to Post Retirement Benefit Plan			$ 65
Multiemployer Plans [Abstract]
Percentage of Plan Funded				82.96%