Debt Obligations (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Sep. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011
Acquired Securitized Financings
Securitized financings - contractual amount	$ 106,768		$ 117,507
Purchase Discount
Accretable	(22,244)	(23,679)	(26,032)	(28,258)	(29,779)
Non-accretable (1)
Total securitized financings, net	$ 84,524		$ 91,475