Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	9 Months Ended
	Nov. 30, 2013 item	Feb. 28, 2013
Summary Of Significant Accounting Policies [Abstract]
Cash equivalents	$ 647,500,000	$ 430,300,000
Restricted cash from collections on auto loan receivables	246,795,000	224,287,000
Number of warehouses	2
Required benchmark for account delinquency	120 days
Accumulated Depreciation on Property and Equipment	707,700,000	649,000,000
Restricted cash on deposit in reserve accounts	34,100,000	41,300,000
Restricted investments	$ 40,600,000	$ 35,000,000