Accounting Policies (Narrative) (Details) (USD $)	6 Months Ended
	Aug. 31, 2012	Feb. 29, 2012
Accounting Policies [Abstract]
Cash equivalents	$ 50,100,000	$ 429,300,000
Restricted cash from collections on auto loan receivables	204,731,000	204,314,000
Number of warehouses	2
Required benchmark for account delinquency	120 days
Restricted cash on deposit in reserve accounts	40,500,000	45,300,000
Restricted investments	$ 34,400,000	$ 31,400,000