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v3.23.1

Income Taxes (Income tax losses carried forward) (Details) - CAD ($) | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unrecognized deferred tax assets | $ 1,329,261,000 | $ 1,083,848,000
Unused tax loss carry forward | 2,171,825,000 | $ 2,177,025,000
Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 503,618,000 |
US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 561,739,000 |
Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 1,106,468,000 |
Unused tax expiry 2026 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 14,720,000 |
Unused tax expiry 2026 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2026 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2026 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 14,720,000 |
Unused tax expiry 2027 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 243,000 |
Unused tax expiry 2027 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2027 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2027 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 243,000 |
Unused tax expiry 2028 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 63,000 |
Unused tax expiry 2028 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2028 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2028 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 63,000 |
Unused tax expiry 2029 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 12,672,000 |
Unused tax expiry 2029 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 47,000 |
Unused tax expiry 2029 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2029 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 12,625,000 |
Unused tax expiry 2031 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 21,768,000 |
Unused tax expiry 2031 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2031 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 21,768,000 |
Unused tax expiry 2031 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2032 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 23,716,000 |
Unused tax expiry 2032 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 272,000 |
Unused tax expiry 2032 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 23,444,000 |
Unused tax expiry 2032 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2033 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 36,033,000 |
Unused tax expiry 2033 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2033 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 36,033,000 |
Unused tax expiry 2033 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2034 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 21,250,000 |
Unused tax expiry 2034 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2034 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 16,724,000 |
Unused tax expiry 2034 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 4,526,000 |
Unused tax expiry 2035 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 297,377,000 |
Unused tax expiry 2035 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 282,522,000 |
Unused tax expiry 2035 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 7,622,000 |
Unused tax expiry 2035 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 7,233,000 |
Unused tax expiry 2036 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 262,910,000 |
Unused tax expiry 2036 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 210,591,000 |
Unused tax expiry 2036 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 46,621,000 |
Unused tax expiry 2036 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 5,698,000 |
Unused tax expiry 2037 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 37,933,000 |
Unused tax expiry 2037 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 27,000 |
Unused tax expiry 2037 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 34,921,000 |
Unused tax expiry 2037 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 2,985,000 |
Unused tax expiry 2038 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 38,480,000 |
Unused tax expiry 2038 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 500,000 |
Unused tax expiry 2038 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 37,660,000 |
Unused tax expiry 2038 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 320,000 |
Unused tax expiry 2039 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 35,888,000 |
Unused tax expiry 2039 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 6,423,000 |
Unused tax expiry 2039 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 29,130,000 |
Unused tax expiry 2039 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 335,000 |
Unused tax expiry 2040 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 58,885,000 |
Unused tax expiry 2040 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 3,110,000 |
Unused tax expiry 2040 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 55,775,000 |
Unused tax expiry 2040 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2041 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 229,541,000 |
Unused tax expiry 2041 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 77,000 |
Unused tax expiry 2041 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 229,464,000 |
Unused tax expiry 2041 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry 2042 [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 22,626,000 |
Unused tax expiry 2042 [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 49,000 |
Unused tax expiry 2042 [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 22,577,000 |
Unused tax expiry 2042 [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry no expiry [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 1,057,720,000 |
Unused tax expiry no expiry [Member] | Canada [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry no expiry [Member] | US [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | 0 |
Unused tax expiry no expiry [Member] | Other [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused tax loss carry forward | $ 1,057,720,000 |

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