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COMMITMENTS AND CONTINGENCIES (Details) - CAD ($)
$ in Thousands
Mar. 31, 2024
Mar. 31, 2023
Disclosure of contingent liabilities [line items]    
Purchase obligations $ 369,594  
Letters of credit 171,065 $ 192,508
Less than one year    
Disclosure of contingent liabilities [line items]    
Purchase obligations 353,703  
One - two years    
Disclosure of contingent liabilities [line items]    
Purchase obligations 13,535  
Two - three years    
Disclosure of contingent liabilities [line items]    
Purchase obligations 1,732  
Three - four years    
Disclosure of contingent liabilities [line items]    
Purchase obligations 562  
Four - five years    
Disclosure of contingent liabilities [line items]    
Purchase obligations $ 62