Other Expenses - Other Expenses Breakout (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Other Expenses [Abstract]
Accretion Expense	$ 0.0	$ 0.1	$ 0.4
General Insurance Expense	2.6	2.7	2.1
Advertising Expense	6.2	4.0	5.1
Supplies and Postage Expense	1.7	2.1	1.2
Clearance Fees	2.5	2.6	1.3
Taxes, Miscellaneous	4.9	4.6	4.3
Other Expenses	8.4	9.8	7.9
Operating Costs and Expenses	$ 26.3	$ 25.9	$ 22.3