v3.26.1
Debentures (Details)
$ / shares in Units, shares in Thousands
12 Months Ended
Feb. 28, 2026
USD ($)
$ / shares
shares
Feb. 28, 2025
USD ($)
Feb. 29, 2024
USD ($)
Nov. 17, 2023
USD ($)
Nov. 13, 2023
USD ($)
Debt Instrument [Line Items]          
Long-term notes (note 7) $ 196,500,000 $ 195,300,000      
Redemption period, end date Feb. 15, 2029        
Par value of convertible debentures $ 1,000        
Conversion of stock (in shares) | shares 51,500        
Interest expense, debt $ 6,000,000.0 6,000,000.0 $ 5,600,000    
Long-term notes (note 7) 241,700,000 289,500,000      
Repayments of Debt 0 0 $ 515,000,000.0    
Related Party Principal Amounts of 2020 Debenture Owned   330,000,000.0      
Senior Notes          
Debt Instrument [Line Items]          
Face amount of debt 200,000,000.0 195,300,000      
Payments of Debt Issuance Costs 1,200,000        
Long-term notes (note 7) $ 196,500,000        
Interest rate 3.00%        
Debt Instrument, Convertible, Number of Equity Instruments - with decimals 257.5826        
Conversion of stock (in shares) | shares 52,000        
Conversion price (in dollars per share) | $ / shares $ 3.88        
Periodic payment, interest $ 3,000,000.0        
Debt Instrument, Frequency of Periodic Payment semi-annual        
Debt Instrument, Redemption, Description        
Debt Instrument, Interest Rate Terms The Notes bear interest at a rate of 3.00% per annum, payable semi-annually in arrears on February 15 and August 15 of each year.        
Payments of Debt Issuance Costs   $ 6,000,000.0      
Extension Debentures          
Debt Instrument [Line Items]          
Face amount of debt       $ 150,000,000.0  
Redemption period, end date     Feb. 15, 2024    
2020 Debentures          
Debt Instrument [Line Items]          
Face amount of debt         $ 365,000,000.0
Redemption period, end date     Nov. 13, 2023