BORROWINGS (Terminated and/or Transferred Facilities and Loans) (Details) (USD $)	12 Months Ended		12 Months Ended	0 Months Ended	12 Months Ended		12 Months Ended					2 Months Ended	12 Months Ended		12 Months Ended		0 Months Ended	2 Months Ended	12 Months Ended			2 Months Ended	12 Months Ended		1 Months Ended			2 Months Ended		1 Months Ended
	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011 Capital Lease Obligations [Member]	Sep. 30, 2011 LEAF [Member]	Sep. 30, 2012 LEAF [Member]	Nov. 30, 2007 LEAF [Member]	Sep. 30, 2011 LEAF [Member] Capital Lease Obligations [Member]	Sep. 30, 2011 Minimum [Member] Capital Lease Obligations [Member]	Sep. 30, 2011 Minimum [Member] LEAF [Member] Capital Lease Obligations [Member]	Sep. 30, 2011 Maximum [Member] Capital Lease Obligations [Member]	Sep. 30, 2011 Maximum [Member] LEAF [Member] Capital Lease Obligations [Member]	Nov. 16, 2011 Securitization of Leases and Loans [Member] LEAF [Member]	Sep. 30, 2012 Securitization of Leases and Loans [Member] LEAF [Member] Note	Oct. 28, 2011 Securitization of Leases and Loans [Member] LEAF [Member]	Sep. 30, 2011 Bridge Loan [Member] LEAF [Member]	Dec. 31, 2010 Bridge Loan [Member] Maximum [Member] LEAF [Member]	Jan. 04, 2011 Guggenheim Revolving Warehouse Credit Facility [Member] LEAF [Member] Note	Nov. 16, 2011 Guggenheim Revolving Warehouse Credit Facility [Member] LEAF [Member]	Sep. 30, 2012 Guggenheim Revolving Warehouse Credit Facility [Member] LEAF [Member]	Sep. 30, 2011 Guggenheim Revolving Warehouse Credit Facility [Member] LEAF [Member]	Jan. 04, 2011 Guggenheim Revolving Warehouse Credit Facility [Member] Maximum [Member] LEAF [Member]	Nov. 16, 2011 Series 2010 - 2 Term Securitization [Member] LEAF [Member]	Sep. 30, 2011 Series 2010 - 2 Term Securitization [Member] LEAF [Member]	May 31, 2010 Series 2010 - 2 Term Securitization [Member] LEAF [Member]	Aug. 31, 2012 Term Notes [Member] Note payments	Aug. 31, 2010 Term Notes [Member] Note payments	Sep. 30, 2008 Term Notes [Member] payments	Sep. 30, 2011 Term Notes [Member] Note payments	Sep. 30, 2012 Term Notes [Member]	Sep. 30, 2008 Term Notes [Member] Unsecured Debt [Member]
Debt Instrument [Line Items]
Securitization of leases and loans amount														$ 105,000,000										$ 120,000,000
Number of classes of notes issued													8				6
Interest rates on loans, minimum	6.00%		6.90%				5.10%						0.40%
Interest rates on loans, maximum	18.00%		7.20%				7.40%						5.50%
Debt weighted average borrowing												42,700,000			8,700,000			68,800,000		40,400,000		70,100,000	62,500,000
Weighted average borrowing rate (in hundredths)												2.60%			6.80%			4.20%		4.10%		5.10%	5.40%
Effective interest rate (in hundredths)												5.60%			9.20%			5.10%		5.10%		8.50%	8.70%
Short-term bridge loan																21,800,000
Revolving credit facility, maximum borrowing capacity																					110,000,000
Description of variable rate basis																	one month LIBOR
Outstanding letters of credit																	150,000,000
Expiration date																			Dec. 15, 2020
Mortgage loan on real estate						1,500,000
Interest rate on mortgage (in hundredths)				8.00%
Mortgage loans on real estate, outstanding balance				1,400,000
Periodic payment on mortgage					11,000
Periodic payment terms					monthly																				monthly	monthly	monthly	monthly
Number of notes issued																									2	2		2
Term of credit facility																														3 years
Borrowings	214,054,000	21,343,000																							546,000	901,000	473,000	615,000	487,000
Number of payments																									9	9	36	9
Monthly payments																									61,508	102,200	14,200	69,773
Capital leases, principal balance							$ 114,000
Lease term								2 years	3 years	3 years	5 years