Other Expenses - Other Expenses Breakout (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Expenses [Abstract]
Accretion Expense	$ 0.0	$ 0.2	$ 0.3	$ 0.4
General Insurance Expense	0.4	0.3	1.1	1.2
Advertising Expense	1.2	0.7	4.2	2.0
Technology Services Costs	1.8	1.2	4.6	3.5
Supplies and Postage Expense	0.3	0.3	0.9	0.9
Clearance Fees	0.5	0.2	1.0	0.8
Taxes, Miscellaneous	1.1	1.1	3.2	3.0
Other Expenses	1.8	1.7	5.5	4.8
Other Cost and Expense, Operating	$ 7.1	$ 5.7	$ 20.8	$ 16.6