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Cash and Cash Equivalents - Components of Cash and Cash Equivalents (Details) - CAD ($)
$ in Thousands
Jun. 30, 2026
Mar. 31, 2026
Cash and Cash Equivalents [Abstract]    
Cash $ 93,669 $ 126,435
Cash equivalents 242,956 238,248
Cash and cash equivalents $ 336,625 $ 364,683