Borrowings from Secured and Unsecured Debt Financings (Details) $ in Thousands	Aug. 31, 2024 USD ($) aircraft	Jul. 18, 2024 USD ($)	Feb. 29, 2024 USD ($)
Outstanding amounts of secured and unsecured term debt financings
Borrowings from secured financings	$ 636,410		$ 875,397
Borrowings from unsecured financings, net	$ 3,823,665		3,823,099
Number of Aircraft | aircraft
Total secured and unsecured debt financings, net of debt issuance costs and discounts	$ 4,460,075		4,698,496
Line of Credit | Revolving Credit Facility
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 20,000		20,000
Revolving Credit Facility | Minimum
Outstanding amounts of secured and unsecured term debt financings
Interest Rate	7.50%
Bank Financings | Notes Payable to Banks
Outstanding amounts of secured and unsecured term debt financings
Borrowings from secured financings	$ 643,200		883,451
Number of Aircraft | aircraft	30
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	7.42%
Bank Financings | Notes Payable, Other Payables
Outstanding amounts of secured and unsecured term debt financings
Weighted-average fixed interest rate	5.89%
Secured Debt
Outstanding amounts of secured and unsecured term debt financings
Debt issuance costs and discounts	$ (6,790)		(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%
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%
Senior Notes due 2031 | Senior Notes | 5.75%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 500,000	$ 500,000	0
Interest Rate	5.75%
Unsecured Debt
Outstanding amounts of secured and unsecured term debt financings
Debt issuance costs and discounts	$ (46,335)		$ (46,901)