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Business acquisitions - Narrative (Details) - CAD ($) |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 01, 2023 | Dec. 31, 2022 | Oct. 01, 2022 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
MacKellar |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Percentage of business acquired | 100.00% |  |  |  |  |  |
Total consideration transferred | $ 179,668,000 |  |  |  |  |  |
Financing obligations, payments | 73,657,000 |  |  |  | $ 73,657,000 | $ 73,657,000 |
Finance lease obligations, payments | 18,509,000 |  |  |  | 18,509,000 |  |
Accounts receivable | 65,033,000 |  |  |  |  |  |
Property, plant and equipment | 394,394,000 |  |  |  |  |  |
Revenue |  |  |  | $ 122,519,000 |  |  |
Revenue percentage |  |  |  | 12.80% |  |  |
Net income |  |  |  | $ 13,946,000 |  |  |
Net income percentage |  |  |  | 22.10% |  |  |
Acquisition related costs |  |  |  |  |  | 7,095,000 |
Total consideration transferred | 383,614,000 |  |  |  |  |  |
Assumed lease liabilities | 30,516,000 |  |  |  |  |  |
Cash consideration | $ 65,572,000 |  |  |  |  |  |
Deferred consideration related to acquisition |  | $ 0 |  | $ 20,070,000 | 20,070,000 | 20,070,000 | $ 0
MLN |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Percentage of business acquired |  |  | 100.00% |  |  |  |
Accounts receivable |  |  | $ 4,068,000 |  |  |  |
Property, plant and equipment |  |  | 9,562,000 |  |  |  |
Revenue |  |  |  |  |  |  | 5,224,000
Net income |  |  |  |  |  |  | 1,094,000
Acquisition related costs |  |  |  |  |  |  | 95,000
Total consideration transferred |  |  | 8,002,000 |  |  |  |
Property, plant and equipment and working capital |  |  | 13,723,000 |  |  |  |
Assumed lease liabilities |  |  | $ 5,721,000 |  |  |  |
Cash consideration |  | 3,000,000 |  |  |  |  |
Deferred consideration related to acquisition |  | $ 5,002,000 |  | $ 0 | $ 0 | 0 | $ 5,002,000
Deferred consideration paid |  |  |  |  |  | $ 5,002,000 |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479405/805-10-25-23 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-1 + Details
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