Borrowings from Secured and Unsecured Debt Financings (Details) $ in Thousands	May 31, 2024 USD ($) aircraft	Feb. 29, 2024 USD ($)
Outstanding amounts of secured and unsecured term debt financings
Borrowings from secured financings	$ 855,908	$ 875,397
Borrowings from unsecured financings, net	$ 3,876,765	3,823,099
Number of Aircraft | aircraft
Total secured and unsecured debt financings, net of debt issuance costs and discounts	$ 4,732,673	4,698,496
Allowance for Credit Loss	12,924	13,069
Line of Credit | Revolving Credit Facility
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 570,000	20,000
Revolving Credit Facility | Minimum
Outstanding amounts of secured and unsecured term debt financings
Interest Rate	6.67%
Revolving Credit Facility | Maximum
Outstanding amounts of secured and unsecured term debt financings
Interest Rate	7.48%
Bank Financings | Notes Payable to Banks
Outstanding amounts of secured and unsecured term debt financings
Borrowings from secured financings	$ 863,333	883,451
Number of Aircraft | aircraft	38
Bank Financings | Notes Payable to Banks | Minimum
Outstanding amounts of secured and unsecured term debt financings
Interest Rate	2.36%
Bank Financings | Notes Payable to Banks | Maximum
Outstanding amounts of secured and unsecured term debt financings
Interest Rate	7.69%
Bank Financings | Notes Payable, Other Payables
Outstanding amounts of secured and unsecured term debt financings
Weighted-average fixed interest rate	5.46%
Secured Debt
Outstanding amounts of secured and unsecured term debt financings
Debt issuance costs and discounts	$ (7,425)	(8,054)
Senior Notes due 2024(2) | Senior Notes | 4.125
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	0	$ 500,000
Interest Rate		4.125%
Senior Notes due 2025 | Senior Notes | 5.25%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 650,000	$ 650,000
Interest Rate	5.25%
Senior Notes due 2026 | Senior Notes | 4.25%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 650,000	650,000
Interest Rate	4.25%
2.850% Senior Notes due 2028 | Senior Notes | 2.85%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 750,000	750,000
Interest Rate	2.85%
6.500% Senior Notes due 2028 | Senior Notes | 6.50%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 650,000	650,000
Interest Rate	6.50%
Unsecured Debt
Outstanding amounts of secured and unsecured term debt financings
Debt issuance costs and discounts	$ (43,235)	(46,901)
Senior Notes due 2029 | Senior Notes | 5.95%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 650,000	$ 650,000
Interest Rate	5.95%