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EMPLOYEE BENEFITS - Assumptions (Details) - CAD ($)
$ in Thousands
Mar. 31, 2025
Mar. 31, 2024
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Discount rate 3.70% 3.80%
Rate of compensation increase 0.70% 0.60%
Other 100.00% 100.00%
Discount rate    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Accrued benefit obligations $ (2,575)  
Accrued benefit obligations 2,668  
Life expectancy    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Accrued benefit obligations 639  
Accrued benefit obligations $ (645)