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Income Tax - Summary Of Temporary Difference Unused Tax Losses And Unused Tax Credits (Detail) - CAD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Beginning balance | $ (39,192) | $ (27,632)
Charged to net earnings | (43,422) | (14,171)
Charged to OCI | (24) | (405)
Exchange differences | (41) | 3,016
Ending Balance | (82,679) | (39,192)
Accounting provisions and accruals [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Beginning balance | 18,058 | 19,449
Charged to net earnings | (10,945) | (2,080)
Charged to OCI |  |
Exchange differences | (91) | 689
Ending Balance | 7,022 | 18,058
Tax losses [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Beginning balance | 28,969 | 26,082
Charged to net earnings | (21,808) | 2,661
Charged to OCI |  |
Exchange differences | (642) | 226
Ending Balance | 6,519 | 28,969
Long-term asset [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Beginning balance | (73,956) | (57,684)
Charged to net earnings | (12,398) | (18,003)
Charged to OCI |  |
Exchange differences | 99 | 1,731
Ending Balance | (86,255) | (73,956)
Other [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Beginning balance | 544 | 1,330
Charged to net earnings | (572) | (756)
Charged to OCI |  | (61)
Exchange differences | 539 | 31
Ending Balance | 511 | 544
Exchange rate effects on tax bases [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Beginning balance | (12,799) | (17,144)
Charged to net earnings | 2,269 | 4,007
Charged to OCI |  |
Exchange differences | 54 | 338
Ending Balance | (10,476) | (12,799)
Cash flow hedges [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Beginning balance | (8) | 335
Charged to net earnings | 32 |
Charged to OCI | (24) | (344)
Exchange differences |  | 1
Ending Balance |  | $ (8)

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