Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	May 31, 2026	Feb. 28, 2026
Significant Unobservable Inputs (Level 3) | Reported Value Measurement | Debt Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investment	$ 5,090	$ 5,704
Significant Unobservable Inputs (Level 3) | Reported Value Measurement | Other Security Investments
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investment	728	728
Significant Unobservable Inputs (Level 3) | Estimate of Fair Value Measurement | Debt Securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investment	5,090	5,704
Significant Unobservable Inputs (Level 3) | Estimate of Fair Value Measurement | Other Security Investments
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Investment	728	728
Unsecured Debt | Quoted Prices in Active Markets for Identical Assets (Level 1) | Reported Value Measurement | Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instruments	4,350,000	4,350,000
Unsecured Debt | Quoted Prices in Active Markets for Identical Assets (Level 1) | Estimate of Fair Value Measurement | Senior Notes
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instruments	4,376,329	4,452,826
Unsecured Debt | Significant Other Observable Inputs (Level 2) | Reported Value Measurement | Revolving Credit Facility
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instruments	20,000	240,000
Unsecured Debt | Significant Other Observable Inputs (Level 2) | Reported Value Measurement | Other Financings
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instruments	975,000	600,000
Unsecured Debt | Significant Other Observable Inputs (Level 2) | Estimate of Fair Value Measurement | Revolving Credit Facility
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instruments	20,000	240,000
Unsecured Debt | Significant Other Observable Inputs (Level 2) | Estimate of Fair Value Measurement | Other Financings
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instruments	977,074	604,385
Secured Debt | Significant Other Observable Inputs (Level 2) | Reported Value Measurement | Other Financings
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instruments	113,337	114,177
Secured Debt | Significant Other Observable Inputs (Level 2) | Estimate of Fair Value Measurement | Other Financings
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Debt instruments	$ 106,946	$ 107,299