Auto Loan Receivables (Auto Loan Receivables, Net) (Details) - USD ($) $ in Thousands	May 31, 2020	Mar. 01, 2020	Feb. 29, 2020	May 31, 2019	Feb. 28, 2019
Total ending managed receivables	$ 13,171,900		$ 13,617,800
Accrued interest and fees	64,800		56,200
Other	(4,900)		35,500
Less: allowance for loan losses	(437,213)	$ (359,800)	(157,796)	$ (147,000)	$ (138,200)
Auto loans receivable, net	12,794,622		13,551,711
Asset-backed term funding
Total ending managed receivables	10,795,300		11,007,100
Warehouse facilities
Total ending managed receivables	1,949,700		2,181,700
Overcollateralization
Total ending managed receivables	291,000		289,000
Other managed receivables
Total ending managed receivables	$ 135,900		$ 140,000