Other Expenses - Other Expenses Breakout (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Expenses [Abstract]
General Insurance Expense	$ 0.9	$ 0.7	$ 2.6	$ 1.9
Advertising Expense	1.2	1.0	4.1	5.3
Supplies and Postage Expense	0.5	0.5	1.5	1.3
Clearance Fees	0.7	0.8	1.8	1.8
Taxes, Miscellaneous	1.1	1.3	3.2	3.8
Other Expenses	2.7	1.7	7.8	6.3
Other Cost and Expense, Operating	$ 7.1	$ 6.0	$ 21.0	$ 20.4