BASIS OF PRESENTATION - Long-Term Receivables (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2016	Sep. 30, 2016
Notes, Loans and Financing Receivable, Gross, Noncurrent [Roll Forward]
Balance, beginning of period	$ 90,224
Additions: Advances and other loans, including interest receivable	2,817
Additions: Development fees, including interest receivable	1,961
Deductions: Payments	(1,452)
Balance, end of period	93,550
Current portion of long-term receivables	3,900	$ 4,900
Interest receivable	53,600	$ 51,000
Affiliates
Notes, Loans and Financing Receivable, Gross, Noncurrent [Roll Forward]
Balance, beginning of period	86,851
Additions: Advances and other loans, including interest receivable	2,372
Additions: Development fees, including interest receivable	1,961
Deductions: Payments	(1,409)
Balance, end of period	89,775
Others
Notes, Loans and Financing Receivable, Gross, Noncurrent [Roll Forward]
Balance, beginning of period	3,373
Additions: Advances and other loans, including interest receivable	445
Additions: Development fees, including interest receivable	0
Deductions: Payments	(43)
Balance, end of period	$ 3,775