Note 4 - Receivables (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Impaired Financing Receivable, Unpaid Principal Balance	$ 77.5	$ 90.3
High [Member] \| Alabama [Member]
Impaired Financing Receivable, Unpaid Principal Balance	75.0	84.0
Alabama [Member]
Impaired Financing Receivable, Unpaid Principal Balance	$ 35.0	$ 48.8

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

Name:	us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant