Auto Loan Receivables (Auto Loan Receivables, Net) (Details) - USD ($) $ in Thousands	May 31, 2021	Feb. 28, 2021	May 31, 2020	Mar. 01, 2020	Feb. 29, 2020
Total ending managed receivables	$ 14,465,900	$ 13,847,200
Accrued interest and fees	67,900	57,400
Other	4,700	(3,700)
Less: allowance for loan losses	(379,481)	(411,150)	$ (437,200)	$ (359,800)	$ (157,800)
Auto loans receivable, net	14,159,044	13,489,819
Asset-backed term funding
Total ending managed receivables	11,007,900	11,008,300
Warehouse facilities
Total ending managed receivables	2,856,900	2,314,100
Overcollateralization
Total ending managed receivables	391,300	345,200
Other managed receivables
Total ending managed receivables	$ 209,800	$ 179,600