Debt - Summary of Components of Debt (Details) - CAD ($) $ in Thousands	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Debt Instrument [Line Items]
Principal	$ 280,972	$ 315,466
Book Value	233,360	304,069
Less: current portion	(16,237)	(4,258)	$ (103,935)
Long-term portion	$ 217,123	299,811	$ 493,294
Credit Facility
Debt Instrument [Line Items]
Maturity date	Sep. 18, 2027
Principal	$ 0	216,686
Book Value	$ 0	211,120
Loan Agreement
Debt Instrument [Line Items]
Maturity date	Jan. 31, 2031
Principal	$ 225,972	0
Book Value	$ 177,042	0
January 2026 Convertible Debenture
Debt Instrument [Line Items]
Maturity date	Jul. 08, 2031
Principal	$ 55,000	0
Book Value	$ 56,318	0
May 2024 Convertible Debenture
Debt Instrument [Line Items]
Maturity date	May 14, 2029
Principal	$ 0	96,358
Book Value	0	90,231
Other Revolving Debt Facility, Loan, and Financings
Debt Instrument [Line Items]
Principal	0	2,422
Book Value	$ 0	$ 2,718

Face (par) amount of debt instrument at time of issuance.

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