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INVESTMENTS IN EQUITY INVESTEES (Details) (USD $)
Dec. 31, 2012
Sep. 30, 2012
Schedule of Equity Method Investments [Line Items]    
Investments in equity investees $ 154,537,000 $ 155,795,000
Steckman Ridge [Member]
   
Schedule of Equity Method Investments [Line Items]    
Investments in equity investees 132,709,000 132,931,000
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 $ 21,828,000 $ 22,864,000