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INVESTMENTS IN EQUITY INVESTEES (Details) (USD $)	Mar. 31, 2013	Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]
Investments in equity investees	$ 155,114,000	$ 155,795,000
Steckman Ridge [Member]
Schedule of Equity Method Investments [Line Items]
Investments in equity investees	132,210,000	132,931,000
Steckman Ridge [Member] \| Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding principal balance	70,400,000
Iroquois [Member]
Schedule of Equity Method Investments [Line Items]
Investments in equity investees	$ 22,904,000	$ 22,864,000

Aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due after one year (or one business cycle).

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