BASIS OF PRESENTATION - Long-Term Receivables (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2012		Jun. 30, 2012		Mar. 31, 2012	Sep. 30, 2011
Notes, Loans and Financing Receivable, Gross, Noncurrent [Roll Forward]
Balance, beginning of period	$ 49,758,000		$ 47,846,000
Additions: Issuance of affiliate advances and tenant loans	2,132,000	[1]	4,122,000	[1]
Deductions: Payments received	(35,000)		(113,000)
Balance, end of period	51,855,000		51,855,000
Interest receivable	22,000,000		22,000,000		20,100,000	18,400,000
Adjustment to increase long-term receivables	1,100,000		1,100,000
Affiliates [Member]
Notes, Loans and Financing Receivable, Gross, Noncurrent [Roll Forward]
Balance, beginning of period	48,551,000	[2]	46,561,000	[2]
Additions: Issuance of affiliate advances and tenant loans	2,132,000	[1],[2]	4,122,000	[1],[2]
Deductions: Payments received	0	[2]	0	[2]
Balance, end of period	50,683,000	[2]	50,683,000	[2]
Tenants [Member]
Notes, Loans and Financing Receivable, Gross, Noncurrent [Roll Forward]
Balance, beginning of period	1,207,000		1,285,000
Additions: Issuance of affiliate advances and tenant loans	0	[1]	0	[1]
Deductions: Payments received	(35,000)		(113,000)
Balance, end of period	$ 1,172,000		$ 1,172,000

[1] Includes adjustment to increase long-term receivables by $1.1 million, which related to prior periods.

[2] Includes interest receivable of $20.1 million, $22.0 million and $18.4 million as of March 31, 2012, June 30, 2012 and September 30, 2011, respectively. The WTG receivables no longer accrue interest pursuant to a release and reimbursement agreement entered into in September 2010.