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Marketable Securities (Details) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Company's assets measured at fair value
Total	$ 81,361,000	$ 81,375,000
Equities [Member]
Company's assets measured at fair value
Total	18,222,000	13,912,000
Mutual Funds [Member]
Company's assets measured at fair value
Total	20,520,000	18,588,000
Exchange Traded Funds [Member]
Company's assets measured at fair value
Total	4,833,000
Corporate Bonds [Member]
Company's assets measured at fair value
Total	11,802,000	14,178,000
Municipal Bonds [Member]
Company's assets measured at fair value
Total	23,568,000	28,513,000
Government Securities [Member]
Company's assets measured at fair value
Total		6,000,000
Cash and Money Funds [Member]
Company's assets measured at fair value
Total	2,416,000	184,000
Level 1 [Member]
Company's assets measured at fair value
Total	45,991,000	38,684,000
Level 1 [Member] | Equities [Member]
Company's assets measured at fair value
Total	18,222,000	13,912,000
Level 1 [Member] | Mutual Funds [Member]
Company's assets measured at fair value
Total	20,520,000	18,588,000
Level 1 [Member] | Exchange Traded Funds [Member]
Company's assets measured at fair value
Total	4,833,000
Level 1 [Member] | Government Securities [Member]
Company's assets measured at fair value
Total		6,000,000
Level 1 [Member] | Cash and Money Funds [Member]
Company's assets measured at fair value
Total	2,416,000	184,000
Level 2 [Member]
Company's assets measured at fair value
Total	35,370,000	42,691,000
Level 2 [Member] | Corporate Bonds [Member]
Company's assets measured at fair value
Total	11,802,000	14,178,000
Level 2 [Member] | Municipal Bonds [Member]
Company's assets measured at fair value
Total	23,568,000	28,513,000
Level 3 [Member]
Company's assets measured at fair value
Total
Level 3 [Member] | Equities [Member]
Company's assets measured at fair value
Total
Level 3 [Member] | Mutual Funds [Member]
Company's assets measured at fair value
Total
Level 3 [Member] | Exchange Traded Funds [Member]
Company's assets measured at fair value
Total
Level 3 [Member] | Corporate Bonds [Member]
Company's assets measured at fair value
Total
Level 3 [Member] | Municipal Bonds [Member]
Company's assets measured at fair value
Total
Level 3 [Member] | Government Securities [Member]
Company's assets measured at fair value
Total
Level 3 [Member] | Cash and Money Funds [Member]
Company's assets measured at fair value
Total

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