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Accounting Policies (Narrative) (Details)	9 Months Ended
	Nov. 30, 2016 USD ($) warehouse	Feb. 29, 2016 USD ($)
Accounting Policies [Abstract]
Cash equivalents	$ 272,000	$ 109,000
Restricted cash from collections on auto loan receivables	$ 357,040,000	343,829,000
Number of warehouse facilities | warehouse	3
Required benchmark for account delinquency	120 days
Accumulated depreciation and amortization	$ 1,010,000,000	925,300,000
Restricted cash on deposit in reserve accounts	50,200,000	46,600,000
Restricted investments	$ 70,700,000	$ 63,000,000

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Number of warehouses

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Required benchmark for account delinquency

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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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-Publisher FASB
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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

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