Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands		12 Months Ended
	Mar. 01, 2019 USD ($)	Feb. 29, 2020 USD ($) segment warehouse	Feb. 28, 2019 USD ($)	Feb. 28, 2018 USD ($)
Accounting Policies [Abstract]
Number of Reportable Segments | segment		2
Liquid investments, maturity period		three months or less
Restricted cash from collections on auto loans receivable		$ 481,043	$ 440,669	$ 399,442
Number of warehouses | warehouse		3
Required benchmark for account delinquency, in days		120 days
Restricted Cash and Cash Equivalents, Noncurrent		$ 117,136	107,770	110,931
Other investments		156,700	83,700
Accrued compensation and benefits		142,900	155,900
General liability and workers' compensation insurance		41,000	37,800
Advertising expenses		191,800	167,000	158,600
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				$ 10,580
Asset-backed term funding transactions
Restricted Cash and Cash Equivalents, Noncurrent		$ 67,800	$ 61,100
Financing Obligations
Estimated useful life average, years		25 years
Assets, Total [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 452,000
Liabilities, Total [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 474,000
Minimum | Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ 200,000
Maximum | Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification		$ 250,000