SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - LOAN RECEIVABLE (Details) - USD ($)	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable in other current assets	$ 5,200,000	$ 3,900,000
Loans receivable in other noncurrent assets	$ 33,700,000	27,300,000
Threshold period in establishing allowance for doubtful accounts	60 days
Allowance for doubtful accounts	$ 0	$ 0
Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan term	2 years
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan term	10 years