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Marketable Securities (Details) (USD $)	Jun. 30, 2012	Sep. 30, 2011
Schedule of Assets Measured at Fair Value
Assets, Fair Value	$ 76,238,000	$ 72,486,000
Equities [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	19,026,000	24,213,000
Mutual Funds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	10,976,000	2,566,000
Corporate Bonds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	12,231,000	7,845,000
Municipal Bonds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	29,868,000	35,844,000
Cash and Money Funds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	4,137,000	2,018,000
Level 1 [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	34,139,000	28,797,000
Level 1 [Member] | Equities [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	19,026,000	24,213,000
Level 1 [Member] | Mutual Funds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	10,976,000	2,566,000
Level 1 [Member] | Corporate Bonds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 1 [Member] | Municipal Bonds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 1 [Member] | Cash and Money Funds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	4,137,000	2,018,000
Level 2 [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	42,099,000	43,689,000
Level 2 [Member] | Equities [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 2 [Member] | Mutual Funds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 2 [Member] | Corporate Bonds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	12,231,000	7,845,000
Level 2 [Member] | Municipal Bonds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value	29,868,000	35,844,000
Level 2 [Member] | Cash and Money Funds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 3 [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 3 [Member] | Equities [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 3 [Member] | Mutual Funds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 3 [Member] | Corporate Bonds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 3 [Member] | Municipal Bonds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value
Level 3 [Member] | Cash and Money Funds [Member]
Schedule of Assets Measured at Fair Value
Assets, Fair Value

X

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration