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INVESTMENTS IN EQUITY INVESTEES - SCHEDULE OF EQUITY METHOD INVESTMENTS (Details) (USD $) | Dec. 31, 2013 | Sep. 30, 2013
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Investments in equity investees | $ 151,637,000 | $ 152,791,000
Steckman Ridge [Member] |  |
Schedule of Equity Method Investments [Line Items] |  |
Investments in equity investees | 129,276,000 | 129,707,000
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 | $ 22,361,000 | $ 23,084,000

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