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Acquisitions - Investments in affiliates and joint ventures (Details) - CAD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 01, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Schedule of Equity Method Investments [Line Items] |  |  |
Payment to sellers |  | $ 11,728 | $ 0
Nuna Logistics Limited |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Payment to sellers | $ 41,500 |  |
Transaction costs | $ 1,300 |  |
Ownership percentage | 49.00% |  |
Current assets |  |  |
Cash | $ 10,939 |  |
Accounts receivable, net | 13,234 |  |
Contract assets | 3,089 |  |
Inventories | 3,926 |  |
Prepaid expenses and deposits | 304 |  |
Current assets | 31,492 |  |
Property, plant and equipment | 15,962 |  |
Other assets | 1,375 |  |
Investment in affiliates and joint ventures | 11,728 |  |
Total Assets | 60,557 |  |
Liabilities |  |  |
Accounts payable | 10,604 |  |
Accrued liabilities | 1,136 |  |
Contract liabilities | 360 |  |
Current portion of long term debt | 0 |  |
Current portion of capital lease obligations | 0 |  |
Current liabilities | 12,100 |  |
Long term debt | 3,127 |  |
Capital lease obligation | 542 |  |
Deferred tax liabilities | 1,938 |  |
Total Liabilities | 17,707 |  |
Net assets acquired | $ 42,850 |  |
Nuna Logistics Limited | Kitikmeot Corporation |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership percentage | 51.00% |  |
Nuna East Ltd. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership percentage |  | 37.25% |
Nuna Pang Contracting Ltd. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership percentage |  | 37.25% |
Nuna West Mining Ltd. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership percentage |  | 49.00% |
Nuna Logistics Partnership |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Ownership percentage |  | 49.00% |

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