Auto Loan Receivables (Allowance for Loan Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2022	May 31, 2021	Feb. 28, 2022	Feb. 28, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	$ 458,214	$ 379,500	$ 433,030	$ 411,100
Financing Receivable, Allowance for Credit Loss, Writeoff	(68,200)	(41,800)
Financing Receivable, Allowance for Credit Loss, Recovery	35,600	34,600
Provision for loan losses	57,800	$ (24,400)
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)	$ 25,200
Allowance For Loan Losses, percent
Financing Receivable, Allowance for Credit Loss [Line Items]
Item as percent of total ending managed receivables	2.85%	2.62%	2.77%	2.97%
Core managed receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	$ 390,400	$ 348,100	$ 377,500	$ 379,400
Financing Receivable, Allowance for Credit Loss, Writeoff	(61,400)	(38,700)
Financing Receivable, Allowance for Credit Loss, Recovery	33,100	32,200
Provision for loan losses	41,200	(24,800)
Other managed receivables
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss	67,800	31,400	$ 55,500	$ 31,700
Financing Receivable, Allowance for Credit Loss, Writeoff	(6,800)	(3,100)
Financing Receivable, Allowance for Credit Loss, Recovery	2,500	2,400
Provision for loan losses	$ 16,600	$ 400