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Accounting Policies (Narrative) (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Aug. 31, 2017 USD ($)	Aug. 31, 2017 USD ($) warehouse	Aug. 31, 2016 USD ($)	Feb. 28, 2017 USD ($)
Accounting Policies [Abstract]
Cash equivalents	$ 500	$ 500		$ 300
Restricted cash from collections on auto loan receivables	404,276	$ 404,276		380,353
Number of warehouse facilities | warehouse		3
Required benchmark for account delinquency		120 days
Accumulated depreciation and amortization	1,110,000	$ 1,110,000		1,040,000
Restricted cash on deposit in reserve accounts	55,800	55,800		52,800
Restricted investments	75,200	75,200		$ 70,800
Excess Tax Benefit from Share-based Compensation	$ 2,200	$ 4,600	$ 6,800

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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