Mortgage Loans (Details Textual) - Financial Services [Member] - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Interest rate lock commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 492.9	$ 303.2
Best-efforts and mandatory commitments [Member]
Derivative [Line Items]
Derivative, Notional Amount	64.8	28.2
Hedging Instruments related to IRLCs [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	327.0	348.2
Derivative, Notional Amount	$ 376.0	$ 243.8

Nominal or face amount used to calculate payments on the derivative asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959

Name:	us-gaap_DerivativeAssetNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant