FINANCING RECEIVABLES (Allowance for Credit Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Activity in the allowance for credit losses of financing receivables [Roll Forward]
Balance, beginning of period	$ 27,613	$ 10,935
Provision for credit losses	5,152	2,250
Charge-offs	(140)	124
Recoveries	3	25
Deconsolidation of LEAF		482
Balance, end of period	32,628	12,604
Ending balance, individually evaluated for impairment	32,560	12,575
Ending balance, collectively evaluated for impairment	68	29
Balance, end of period	32,628	12,604
Gross financing receivables related to the balance in the allowance for credit losses [Abstract]
Ending balance, individually evaluated for impairment	63,178		61,998
Ending balance, collectively evaluated for impairment	112		45
Balance, end of period	63,290		62,043
Receivables from Managed Entities [Member]
Activity in the allowance for credit losses of financing receivables [Roll Forward]
Balance, beginning of period	27,580	10,490
Provision for credit losses	5,120	2,085
Charge-offs	(140)	0
Recoveries	0	0
Deconsolidation of LEAF		0
Balance, end of period	32,560	12,575
Ending balance, individually evaluated for impairment	32,560	12,575
Ending balance, collectively evaluated for impairment	0	0
Balance, end of period	32,560	12,575
Gross financing receivables related to the balance in the allowance for credit losses [Abstract]
Ending balance, individually evaluated for impairment	63,178		61,998
Ending balance, collectively evaluated for impairment	0		0
Balance, end of period	63,178		61,998
Leases and Loans [Member]
Activity in the allowance for credit losses of financing receivables [Roll Forward]
Balance, beginning of period	0	430
Provision for credit losses	(3)	151
Charge-offs		(124)
Recoveries	3	25
Deconsolidation of LEAF		(482)
Balance, end of period	0	0
Ending balance, individually evaluated for impairment	0	0
Ending balance, collectively evaluated for impairment	0	0
Balance, end of period	0	0
Rent Receivables [Member]
Activity in the allowance for credit losses of financing receivables [Roll Forward]
Balance, beginning of period	33	15
Provision for credit losses	35	14
Charge-offs	0	0
Recoveries	0	0
Deconsolidation of LEAF		0
Balance, end of period	68	29
Ending balance, individually evaluated for impairment	0	0
Ending balance, collectively evaluated for impairment	68	29
Balance, end of period	68	29
Gross financing receivables related to the balance in the allowance for credit losses [Abstract]
Ending balance, individually evaluated for impairment	0		0
Ending balance, collectively evaluated for impairment	112		45
Balance, end of period	$ 112		$ 45