Other Expenses - Other Expenses Breakout (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Expenses [Abstract]
Accretion Expense	$ 0.0	$ 0.0	$ 0.0	$ 0.1
General Insurance Expense	0.7	0.7	1.9	2.0
Advertising Expense	1.0	1.0	5.3	3.1
Supplies and Postage Expense	0.5	0.6	1.3	1.7
Clearance Fees	0.8	0.9	1.8	1.6
Taxes, Miscellaneous	1.3	1.2	3.8	3.5
Other Expenses	1.7	2.3	6.3	6.9
Other Cost and Expense, Operating	$ 6.0	$ 6.7	$ 20.4	$ 18.9