Other Expenses - Other Expenses Breakout (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Other Expenses [Abstract]
General Insurance Expense	$ 0.9	$ 0.6	$ 1.7	$ 1.2
Advertising Expense	1.5	3.4	2.9	4.3
Supplies and Postage Expense	0.5	0.4	1.0	0.8
Clearance Fees	0.7	0.5	1.1	1.0
Taxes, Miscellaneous	1.2	1.3	2.1	2.5
Other Expenses	2.6	2.5	5.1	4.6
Other Cost and Expense, Operating	$ 7.4	$ 8.7	$ 13.9	$ 14.4