Segmented Information - Summary of Disaggregation of Long-lived Tangible Assets by Geographic Areas (Details) - CAD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue	$ 942,780	$ 1,074,537
CANADA
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue	827,591	847,678
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue	63,247	143,747
Other
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue	$ 51,942	$ 83,112