4. Securitization Trust Debt (Details Narrative) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Securitization Trust Debt Details Narrative
Restricted Cash for securitization trust debt	$ 139,100

Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

No definition available.

Name:	us-gaap_RestrictedCashAndInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant