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Income and other taxes - Change in deferred income tax liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Net |  |
Net, beginning of period | $ (75,868) | $ (161,206)
Deferred income tax recovery included in net income | 5,340 | 87,301
Deferred income tax recovery (expense) included in other comprehensive income | (42,919) | (2,325)
Other | (1,089) | 362
Net, end of period | (114,536) | (75,868)
Deferred tax assets |  |
Deferred tax assets, beginning of period | 137,524 | 111,614
Deferred income tax recovery included in net income | (592) | 28,243
Deferred income tax recovery (expense) included in other comprehensive income | (38,763) | (2,333)
Other | 0 | 0
Deferred tax assets, end of period | 98,169 | 137,524
Deferred tax liabilities |  |
Deferred tax liabilities, beginning of period | (213,392) | (272,820)
Deferred income tax recovery included in net income | 5,932 | 59,058
Deferred income tax recovery (expense) included in other comprehensive income | (4,156) | 8
Other | (1,089) | 362
Deferred tax liabilities, end of period | $ (212,705) | $ (213,392)

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- Definition The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_ii&doctype=Standard -URIDate 2021-03-24 + Details
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