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