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FINANCIAL INSTRUMENTS AND RISK MANAGEMENT - Narrative (Details) $ in Thousands, $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2024 CAD ($) | Mar. 31, 2024 USD ($) | Mar. 31, 2023 CAD ($) | Mar. 31, 2023 USD ($) | Nov. 21, 2023 CAD ($) | Nov. 04, 2022 CAD ($) | Apr. 20, 2022 EUR (€) | Apr. 20, 2022 USD ($) | Mar. 31, 2022 CAD ($)
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 170,177 |  | $ 159,867 |  |  |  |  |  | $ 135,282
Credit Facility |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |
Undrawn borrowing facilities | 447,339 |  | 456,010 |  |  |  |  |  |
Currency risk |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |
Effect on accumulated other comprehensive income | 8,602 | $ 36,925 | 62,943 | $ 72,051 |  |  |  |  |
Effect on income before income taxes | $ 1,679 | $ 6,934 | 12 | $ 2,840 |  |  |  |  |
Reasonably possible change in risk variable, percent | 5.00% |  |  |  |  |  |  |  |
Interest rate risk |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |
Effect on income before income taxes | $ 4,084 |  | 3,884 |  |  |  |  |  |
Debt subject to movements | $ 408,420 |  | $ 388,397 |  |  |  |  |  |
Debt subject to movements, percentage | 34.00% |  | 33.00% |  |  |  |  |  |
Reasonably possible change in risk variable, percent | 1.00% |  |  |  |  |  |  |  |
Forward contract |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |
Risk management gains (losses) | $ 5,448 |  | $ (21,553) |  |  |  |  |  |
Unrealized gains (losses) | 3,146 |  | (2,758) |  |  |  |  |  |
Realized gains (losses) | 2,302 |  | (18,795) |  |  |  |  |  |
Cash flow hedges |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |
Income recognized | $ 345 |  | $ 75 |  |  |  |  |  |
Cash flow hedges | Interest rate swap instrument |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | € 161,142 | $ 175 |
US interest rate received |  |  |  |  |  |  | 4.125% | 4.125% |
Canadian interest rate paid |  |  |  |  |  |  | 4.169% | 4.169% |
Canadian interest rate received |  |  |  |  |  |  | 4.169% | 4.169% |
Euro interest rate paid |  |  |  |  |  |  | 2.351% | 2.351% |
Cash flow hedges | Variable fixed interest rate swap instrument |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  | $ 300 | $ 300 |  |  |
Derivatives, interest rate fixed |  |  |  |  | 4.044% | 4.241% |  |  |

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