Income and mining taxes (Tables)

12 Months Ended

Dec. 31, 2021

Major components of tax expense (income) [abstract]

Disclosure of detailed information about effective income tax expense recovery [Table Text Block]

		Year ended December 31,
		2021			2020
Current:
Income taxes	$	25,570		$	4,458
Mining taxes		20,830			4,671
Adjustments in respect of prior years		-			(398	)
		46,400			8,731
Deferred:
Income tax recoveries - origination, revaluation and/or reversal of temporary differences		(17,772	)		(39,411	)
Mining tax expense (recoveries) - origination, revaluation and/or reversal of temporary difference		4,235			(3,331	)
Adjustments in respect of prior years		8,744			(494	)
		(4,793	)		(43,236	)
	$	41,607		$	(34,505	)

Disclosure of detailed information about deferred taxes [Table Text Block]

		Dec. 31, 2021			Dec. 31, 2020
Deferred income tax asset	$	133,584		$	94,070
Deferred mining tax asset		-			7,829
		133,584			101,899
Deferred income tax liability		(249,638	)		(220,568	)
Deferred mining tax liability		(12,126	)		(8,865	)
		(261,764	)		(229,433	)
Net deferred tax liability balance, end of year	$	(128,180	)	$	(127,534	)

Disclosure of detailed information about changes in deferred tax assets and liabilities [Table Text Block]

		Year ended Dec. 31, 2021			Year ended Dec. 31, 2020
Net deferred tax liability balance, beginning of year	$	(127,534	)	$	(167,882	)
Deferred tax expense		4,793			43,236
OCI transactions		(5,474	)		(759	)
Foreign currency translation on the deferred tax liability		35			(2,129	)
Net deferred tax liability balance, end of year	$	(128,180	)	$	(127,534	)

Disclosure of detailed information about reconciliation to statutory tax rate [Table Text Block]

		Year ended December 31,
		2021			2020
Statutory tax rate		26.4%			26.3%
Tax recovery at statutory rate	$	(53,526	)	$	(47,047	)
Effect of:
Deductions related to mining taxes		(5,491	)		(1,369	)
Adjusted income taxes		(59,017	)		(48,416	)
Mining tax expense		32,034			1,291
		(26,983	)		(47,125	)
Permanent differences related to:
Capital items		716			(160	)
Other income tax permanent differences		2,775			(1,165	)
Impact of remeasurement on decommissioning liability		33,731			7,094
Temporary income tax differences not recognized		4,483			1,100
Impact related to differences in tax rates in foreign operations		21,201			5,534
Impact of changes to statutory tax rates		(706	)		2,412
Foreign exchange on non-monetary items		4,593			(3,628	)
Impact related to tax assessments and tax return amendments		1,797			1,433
Tax expense (recovery)	$	41,607		$	(34,505	)

Disclosure of temporary differences recognized [Table Text Block]

		Balance sheet
		Dec. 31, 2021			Dec. 31, 2020
Deferred income tax (liability) asset
Property, plant and equipment	$	(40,491	)	$	(88,368	)
Pension obligation		4,369			9,467
Other employee benefits		27,191			25,687
Decommissioning and restoration obligation		29,870			37,902
Non-capital losses		93,892			110,374
Share issuance and debt cost		17,984			8,972
Embedded derivative (prepayment option)		-			(13,137	)
Deferred revenue		1,661			(809	)
Other		(892	)		3,982
Deferred income tax asset		133,584			94,070
Deferred income tax liability (asset)
Property, plant and equipment		322,325			292,858
Other employee benefits		(654	)		203
Asset retirement obligations		(9,609	)		(1,588	)
Non-capital losses		(58,777	)		(78,607	)
Other		(3,647	)		7,702
Deferred income tax liability		249,638			220,568
Deferred income tax liability	$	(116,054	)	$	(126,498	)

Disclosure of detailed information about temporary differences - deferred mining tax assets and liabilities [Table Text Block]

Canada		Dec. 31, 2021			Dec. 31, 2020
Property, plant and equipment	$	(278	)	$	7,829
Peru		Dec. 31, 2021			Dec. 31, 2020
Property, plant and equipment	$	(11,848	)	$	(8,865	)