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v3.23.1

Income Taxes (Significant components of deferred tax assets and liabilities) (Details) - CAD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | $ 12,142,000 | $ 5,448,000 |
Deferred tax assets | 984,071,000 | 937,579,000 |
Deferred tax liabilities | 0 | 0 |
Net deferred tax asset | 984,071,000 | 937,579,000 | $ 936,678,000
Property, plant and equipment [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | 84,668,000 | 82,677,000 |
Net deferred tax assets | 448,136,000 | 363,468,000 |
Provision for reclamation [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | (3,817,000) | (14,509,000) |
Net deferred tax assets | 203,816,000 | 207,633,000 |
Inventories [Member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | 1,689,000 | 2,489,000 |
Net deferred tax assets | 8,248,000 | 6,559,000 |
Net deferred tax liabilities | 0 | 0 |
Foreign exploration and development [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | (1,816,000) | (812,000) |
Net deferred tax assets | 2,641,000 | 4,457,000 |
Income tax losses (gains) [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | (66,227,000) | (80,802,000) |
Net deferred tax assets | 235,683,000 | 301,910,000 |
Defined benefit plan actuarial losses [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | 0 | 0 |
Net deferred tax assets | 2,698,000 | 8,126,000 |
Long-term investments and other, deferred tax assets [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | (2,355,000) | 16,405,000 |
Net deferred tax assets | 82,849,000 | 45,426,000 |
Deferred tax assets [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | 12,142,000 | 5,448,000 |
Net deferred tax assets | 984,071,000 | 937,579,000 |
Property, plant and equipment [Member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | 0 | 0 |
Net deferred tax liabilities | 0 | 0 |
Inventories [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | 0 | 0 |
Net deferred tax liabilities | 0 | 0 |
Deferred tax liabilities [Member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax asset, recognized in earnings | 0 | 0 |
Net deferred tax liabilities | $ 0 | $ 0 |

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