Borrowings from Secured and Unsecured Debt Financings - Outstanding amounts of secured and unsecured term debt financings (Details) $ in Thousands	May 31, 2026 USD ($) aircraft	Apr. 28, 2026 USD ($)	Feb. 28, 2026 USD ($)
Outstanding amounts of secured and unsecured term debt financings
Borrowings from secured financings	$ 111,592		$ 112,355
Borrowings from unsecured financings, net	5,288,395		5,139,411
Total secured and unsecured debt financings, net of debt issuance costs and discounts	5,399,987		5,251,766
Line of Credit | Revolving Credit Facility
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 20,000		240,000
Interest Rate	5.56%
Bank Financings | Notes Payable to Banks
Outstanding amounts of secured and unsecured term debt financings
Borrowings from secured financings	$ 113,337		114,177
Number of Aircraft | aircraft	4
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	4.14%
Bank Financings | Notes Payable, Other Payables
Outstanding amounts of secured and unsecured term debt financings
Weighted-average fixed interest rate	3.11%
Secured Debt
Outstanding amounts of secured and unsecured term debt financings
Debt issuance costs and discounts	$ (1,745)		(1,822)
Senior Notes due 2026(2) | Senior Notes | 4.25%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 0		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
Interest Rate	5.75%
Unsecured Debt
Outstanding amounts of secured and unsecured term debt financings
Debt issuance costs and discounts	$ (56,605)		(50,589)
Senior Notes Due 2030 | Senior Notes | 5.25%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 500,000		500,000
Interest Rate	5.25%
5.000% Senior Notes Due 2030 | Senior Notes | 5.000%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 650,000		650,000
Interest Rate	5.00%
5.000% Senior Notes Due 2031 | Senior Notes | 5.000%
Outstanding amounts of secured and unsecured term debt financings
Borrowings from unsecured financings, net	$ 650,000	$ 650,000	0
Interest Rate	5.00%	5.00%
Term Loan | Unsecured Debt
Outstanding amounts of secured and unsecured term debt financings
Debt Instrument, Face Amount	$ 975,000		$ 600,000
Term Loan | Unsecured Debt | Minimum
Outstanding amounts of secured and unsecured term debt financings
Interest Rate	4.94%
Term Loan | Unsecured Debt | Maximum
Outstanding amounts of secured and unsecured term debt financings
Interest Rate	5.06%