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Intangible assets (Details) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | $ 60,410 |
Intangible assets, end of year | 55,822 | $ 60,410
Cost [Member] |  |
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | 232,526 | 238,190
Effect of movements in exchange rates | (2,319) | (5,664)
Intangible assets, end of year | 230,207 | 232,526
Accumulated amortization [member] |  |
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | (172,116) | (172,588)
Amortization charge | (4,708) | (5,049)
Effect of movements in exchange rates | 2,439 | 5,521
Intangible assets, end of year | (174,385) | (172,116)
Contracts [member] |  |
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | 2,613 |
Intangible assets, end of year | 1,725 | 2,613
Contracts [member] | Cost [Member] |  |
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | 113,707 | 119,371
Effect of movements in exchange rates | (2,319) | (5,664)
Intangible assets, end of year | 111,388 | 113,707
Contracts [member] | Accumulated amortization [member] |  |
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | (111,094) | (115,434)
Amortization charge | (1,008) | (1,181)
Effect of movements in exchange rates | 2,439 | 5,521
Intangible assets, end of year | (109,663) | (111,094)
Intellectual Property [member] |  |
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | 57,797 |
Intangible assets, end of year | 54,097 | 57,797
Intellectual Property [member] | Cost [Member] |  |
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | 118,819 | 118,819
Effect of movements in exchange rates | 0 | 0
Intangible assets, end of year | 118,819 | 118,819
Intellectual Property [member] | Accumulated amortization [member] |  |
Reconciliation of carrying amount [Line Items] |  |
Intangible assets, beginning of year | (61,022) | (57,154)
Amortization charge | (3,700) | (3,868)
Effect of movements in exchange rates | 0 | 0
Intangible assets, end of year | $ (64,722) | $ (61,022)

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- Definition The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_vi&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The increase (decrease) in intangible assets and goodwill resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_vii&doctype=Standard -URIDate 2020-01-01 + Details
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