Auto Loan Receivables (Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020	May 31, 2021	Feb. 28, 2021	May 31, 2020	Mar. 01, 2020	Feb. 29, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning of period	$ 379,500	$ 437,200	$ 411,150	$ 157,800
Financing Receivable, Allowance for Credit Loss	398,058	432,500	398,058	432,500	$ 379,500	$ 411,150	$ 437,200	$ 359,800	$ 157,800
Charge-offs	(43,700)	(53,900)	(85,500)	(124,600)
Recoveries (2)	26,800	23,200	61,400	49,300
Provision for loan losses	35,500	26,000	11,100	148,000
Balance as of end of period (3)	398,058	$ 432,500	398,058	$ 432,500
Tier III
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning of period			31,800
Financing Receivable, Allowance for Credit Loss	38,000		38,000			$ 31,800
Balance as of end of period (3)	$ 38,000		$ 38,000
Allowance For Loan Losses, percent
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Item as percent of total ending managed receivables	2.66%	3.23%	2.66%	3.23%	2.62%	2.97%	3.32%	2.64%	1.16%
Accounting Standards Update 2016-13 [Member] | Financing Receivable [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning of period	$ 0	$ 0	$ 0
Financing Receivable, Allowance for Credit Loss					$ 0	$ 0	$ 0	$ 202,000