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Income and other taxes - Income tax (expense) recovery (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Current tax (expense) recovery: |  |
Current period before undernoted items | $ (127,254) | $ (115,629)
Adjustments to prior years | (324) | (138)
Current tax recovery (expense) | (127,578) | (115,767)
Deferred tax recovery (expense): |  |
Origination and reversal of temporary differences | 9,589 | 4,360
Adjustments to prior years | (400) | (235)
Changes in tax rates | (23) | 3,630
Impact of foreign exchange and other | (1,447) | (2,415)
Deferred tax recovery (expense) | 7,719 | 5,340
Total income tax (expense) recovery | $ (119,859) | $ (110,427)

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