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FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Trade payables (Details) - Trade accounts payable and accrued liabilities - Liquidity risk - CAD ($) $ in Thousands | Mar. 31, 2024 | Mar. 31, 2023
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Disclosure of detailed information about financial instruments [line items] |  |
Accounts payable and accrued liabilities | $ 221,464 | $ 285,486
1 – 30 days |  |
Disclosure of detailed information about financial instruments [line items] |  |
Accounts payable and accrued liabilities | 179,521 | 222,332
31 – 60 days |  |
Disclosure of detailed information about financial instruments [line items] |  |
Accounts payable and accrued liabilities | 27,514 | 32,246
61 – 90 days |  |
Disclosure of detailed information about financial instruments [line items] |  |
Accounts payable and accrued liabilities | 7,732 | 17,836
Over 90 days |  |
Disclosure of detailed information about financial instruments [line items] |  |
Accounts payable and accrued liabilities | $ 6,697 | $ 13,072

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