Auto Loan Receivables (Allowance For Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020	Aug. 31, 2021	Feb. 28, 2021	Aug. 31, 2020	Mar. 01, 2020	Feb. 29, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning of period	$ 398,100	$ 432,500	$ 411,150	$ 157,800
Financing Receivable, Allowance for Credit Loss	426,507	431,600	426,507	431,600	$ 398,100	$ 411,150	$ 432,500	$ 359,800	$ 157,800
Charge-offs	(68,200)	(49,900)	(153,700)	(174,500)
Recoveries (2)	20,400	40,800	81,800	90,200
Provision for loan losses	76,200	8,200	87,300	156,100
Balance as of end of period (3)	426,507	$ 431,600	426,507	$ 431,600
Tier III
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of beginning of period			31,800
Financing Receivable, Allowance for Credit Loss	40,800		40,800			$ 31,800
Balance as of end of period (3)	$ 40,800		$ 40,800
Allowance For Loan Losses, percent
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Item as percent of total ending managed receivables	2.75%	3.17%	2.75%	3.17%	2.66%	2.97%	3.23%	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