Mortgage Loans (Details Textual) (Financial Services [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Interest rate lock commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 440.1	$ 303.2
Best-efforts and mandatory commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	46.0	28.2
Hedging Instruments related to IRLCs [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	373.3	348.2
Derivative, Notional Amount	$ 351.7	$ 243.8