Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Feb. 28, 2014 warehouse	Feb. 28, 2013	Feb. 29, 2012
Cash equivalents	$ 607,000,000	$ 430,300,000
Liquid investments, maturity period	three months or less
Restricted cash from collections on auto loan receivables	259,299,000	224,287,000
Available-for-sale securities	0	0
Available-for-sale Securities, Equity Securities	0	0
Realized Gain Loss on Available-for-sale Securities	0	0
Number of warehouses	2
Required benchmark for account delinquency	120 days
Goodwill and other intangibles, carrying value	10,100,000	10,100,000
Impairment of goodwill or intangible assets	0	0	0
Restricted cash on deposit in reserve accounts	32,500,000	41,300,000
Restricted investments	40,200,000	35,000,000
Accrued compensation and benefits	120,700,000	103,400,000
General liability and workers' compensation insurance	29,700,000	26,600,000
Retail vehicle sales money-back guarantee period, in days	5 days
ESPs offered on all used vehicles provide coverage for a period of time, in months	72 months
Advertising expenses	$ 114,600,000	$ 108,200,000	$ 100,300,000
Finance Leases [Member]
Estimated useful life average, years	25 years