Mortgage Loans (Details Textual) (Financial Services [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Interest rate lock commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 260.7	$ 303.2
Best-efforts and mandatory commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	14.8	28.2
Hedging Instruments related to IRLCs [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	307.0	348.2
Derivative, Notional Amount	$ 221.0	$ 243.8