SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, LOAN RECEIVABLE (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable in other current assets	$ 1,900,000
Loans receivable in other noncurrent assets	14,300,000
Regulatory assets, noncurrent	402,202,000	441,263,000
Other Regulatory Asset Noncurrent [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Regulatory assets, noncurrent		$ 6,800,000