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Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 28, 2026
Feb. 28, 2025
Feb. 29, 2024
Amount      
Tax at U.S. federal statutory tax rate $ (176,156)    
State and local income taxes, net of federal income tax effect 411    
Effect of cross-border tax laws 1,437    
Nontaxable or nondeductible items:      
Other 4,071    
Changes in unrecognized tax benefits (2,529)    
Total $ 60,144 $ (32,087) $ 40,448
Percent      
Tax at U.S. federal statutory tax rate 21.00% 21.00% 21.00%
State and local income taxes, net of federal income tax effect 0.00% 5.60% 2.20%
Changes in valuation allowances   2.50% 3.90%
Asset impairment   2.20% 0.00%
Other   0.20% (0.70%)
Effect of cross-border tax laws (0.20%)    
Nontaxable or nondeductible items:      
Other (0.50%)    
Changes in unrecognized tax benefits 0.30%    
Effective income tax rate (7.20%) (35.00%) 19.30%
Switzerland      
Amount      
Statutory tax rate difference $ 47,502    
Changes in valuation allowances 64,603    
Asset impairment 15,561    
Other $ (6,892)    
Percent      
Statutory tax rate difference (5.70%)    
Changes in valuation allowances (7.70%)    
Asset impairment (1.90%)    
Other 0.80%    
Vaud Canton, Switzerland      
Amount      
Changes in valuation allowances $ 42,030    
Asset impairment 10,124    
Other $ (28,901)    
Percent      
Changes in valuation allowances (5.00%)    
Asset impairment (1.20%)    
Other 3.40%    
United Kingdom      
Amount      
Asset impairment $ 26,984    
Other $ (5,639)    
Percent      
Asset impairment (3.20%)    
Other 0.70%    
Other      
Amount      
Statutory tax rate difference $ 2,707    
Percent      
Statutory tax rate difference (0.30%)    
U.S.      
Amount      
Asset impairment $ 63,732    
Other $ 1,099    
Percent      
Asset impairment (7.60%)    
Other (0.10%)