Long term debt - Schedule of long term debt (Details) - CAD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Long-term Debt, Excluding Current Maturities [Abstract]
Long-term debt, gross	$ 378,737	$ 325,727
Unamortized deferred financing costs	(4,371)	(5,178)
Less: current portion of long-term debt	(20,600)	(19,693)
Long-term portion of debt	358,137	306,034
Long-term Debt, Fiscal Year Maturity [Abstract]
2023	20,600
2024	18,700
2025	184,700
2026	58,400
2027 and thereafter	100,700
Credit Facility
Long-term Debt, Excluding Current Maturities [Abstract]
Long-term debt, gross	180,000	110,000
Convertible debentures
Long-term Debt, Excluding Current Maturities [Abstract]
Long-term debt, gross	129,750	129,750
Financing obligations
Long-term Debt, Excluding Current Maturities [Abstract]
Long-term debt, gross	32,889	47,945
Mortgage
Long-term Debt, Excluding Current Maturities [Abstract]
Long-term debt, gross	29,231	30,000
Promissory notes
Long-term Debt, Excluding Current Maturities [Abstract]
Long-term debt, gross	$ 11,238	$ 13,210

Long-Term Debt, Maturity, Year Five And Thereafter

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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