Financial instruments (Tables)

12 Months Ended

Dec. 31, 2022

Disclosure of detailed information about financial instruments [abstract]

Disclosure of fair value measurement [Table Text Block]

		Dec. 31, 2022				Dec. 31, 2021
		FV		CV		FV		CV
Financial assets at amortized cost
Cash¹	$	225,665	$	225,665	$	270,989	$	270,989
Restricted cash¹		486		486		437		437
Fair value through profit or loss
Trade and other receivables ^1, ^{2, 3}		87,638		87,638		172,890		172,890
Non-hedge derivative assets ⁴		577		577		7,430		7,430
Investments ⁵		9,799		9,799		11,158		11,158
Total financial assets	$	324,165	$	324,165	$	462,904	$	462,904
Financial liabilities at amortized cost
Trade and other payables^1, ²		195,872		195,872		189,179		189,179
Deferred Rosemont acquisition consideration ⁸		18,876		18,876		27,518		27,518
Agreements with communities ⁶		35,870		42,493		33,947		36,273
Wheaton refund liability¹⁰		7,744		6,383		5,424		5,424
Senior unsecured notes ⁷		1,094,988		1,188,132		1,239,018		1,185,805
Fair value through profit or loss
Gold prepayment liability ⁹		71,208		71,208		140,008		140,008
Non-hedge derivative liabilities ⁴		17,995		17,995		12,451		12,451
Total financial liabilities	$	1,442,553	$	1,540,959	$	1,647,545	$	1,596,658

Disclosure of detailed information about significant unobservable inputs used in fair value measurement of assets and liabilities [Table Text Block]

December 31, 2022

Level 1

Level 2

Level 3

Total

Financial assets measured at fair value

Financial assets at FVTPL:

Non-hedge derivatives

577

Investments

9,799

577

10,376

Financial liabilities measured at fair value

Financial liabilities at FVTPL:

Non-hedge derivatives

17,995

Gold prepayment liability

71,208

Financial liabilities at amortized cost:

Agreements with communities

35,870

Wheaton refund liability

7,744

Senior unsecured notes

1,094,988

89,203

43,614

1,227,805

December 31, 2021		Level 1		Level 2		Level 3		Total
Financial assets measured at fair value
Financial assets at FVTPL:
Non-hedge derivatives	$	-	$	7,430	$	-	$	7,430
Investments		11,158		-		-		11,158
	$	11,158	$	7,430	$	-	$	18,588
Financial liabilities measured at fair value
Financial liabilities at FVTPL:
Non-hedge derivatives	$	-	$	12,451	$	-	$	12,451
Gold prepayment liability		-		140,008		-		140,008
Financial liabilities at amortized cost:
Agreements with communities		-		-		33,947		33,947
Wheaton refund liability		-		-		5,424		5,424
Senior unsecured notes		1,239,018		-		-		1,239,018
	$	1,239,018	$	152,459	$	39,371	$	1,430,848

Disclosure of detailed information about net position of contracts awaiting final pricing [Table Text Block]

Metal in
concentrate

Sales awaiting final pricing

Average YTD price ($/unit)

Unit

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2022

Dec. 31, 2021

Copper

pounds
(in thousands)

79,833

75,681

3.80

4.42

Gold

troy ounces

22,079

27,304

1,823

1,828

Silver

troy ounces

71,809

125,800

23.91

23.33

Zinc
Concentrate

pounds
(in thousands)

18,145

1.35

Disclosure of detailed information about foreign currency risk [Table Text Block]

		Dec. 31, 2022									Dec. 31, 2021
		CAD¹			USD²			PEN³			CAD¹			USD²			PEN³
Cash	$	9,833		$	26,749		$	11,067		$	10,627		$	34,439		$	6,992
Trade and other receivables		58			20,520			634			595			71,458			36,470
Other financial assets		9,799			-			-			11,158			-			-
Trade and other payables		(5,626	)		(113	)		(29,587	)		(6,347	)		(3,001	)		(17,006	)
Other financial liabilities		-			-			(42,493	)		-			-			(36,273	)
	$	14,064		$	47,156		$	(60,379	)	$	16,033		$	102,896		$	(9,817	)

Disclosure of detailed information about sensitivity analysis for foreign currency risk [Table Text Block]

December 31, 2022	Change of:		Would have changed 2022 after-tax profit by:
USD/CAD exchange rate¹	+ 10%	$	1.5		million
USD/CAD exchange rate¹	- 10%		(1.8	)	million
USD/PEN exchange rate²	+ 10%		3.5		million
USD/PEN exchange rate²	- 10%		(4.3	)	million
December 31, 2021	Change of:		Would have changed 2021 after-tax profit by:
USD/CAD exchange rate¹	+ 10%	$	4.8		million
USD/CAD exchange rate¹	- 10%		(5.7	)	million
USD/PEN exchange rate²	+ 10%		0.6		million
USD/PEN exchange rate²	- 10%		(0.7	)	million

Disclosure of detailed information about commodity price risk [Table Text Block]

December 31, 2022	Change of:		Would have changed 2022 after-tax profit by:
Copper prices ($/lb)¹	+	$0.30	$	(1.8	)	million
Copper prices ($/lb)¹	-	$0.30		1.8		million
Zinc prices ($/lb)²	+	$0.10		-		million
Zinc prices ($/lb)²	-	$0.10		-		million
December 31, 2021	Change of:			Would have changed 2021 after-tax profit by:
Copper prices ($/lb)¹	+	$0.30	$	0.5		million
Copper prices ($/lb)¹	-	$0.30		(0.5	)	million
Zinc prices ($/lb)²	+	$0.10		0.2		million
Zinc prices ($/lb)²	-	$0.10		(0.2	)	million

Disclosure of detailed information about share price risk [Table Text Block]

December 31, 2022	Change of:		Would have changed 2022 after-tax profit by:
Share prices	+	25%	$	2.4		million
Share prices	-	25%		(2.4	)	million
December 31, 2021	Change of:			Would have changed 2021 after-tax profit by:
Share prices	+	25%	$	2.8		million
Share prices	-	25%		(2.8	)	million

Disclosure of detailed information about interest rate risk [Table Text Block]

December 31, 2022	Change of:		Would have changed 2022 after-tax profit by:
Interest rates	+	2.00%	$	4.5		million
Interest rates	-	2.00%		(4.5	)	million
December 31, 2021	Change of:			Would have changed 2021 after-tax profit by:
Interest rates	+	2.00%	$	5.4		million
Interest rates	-	2.00%		(5.4	)	million

Disclosure of detailed information about liquidity risk [Table Text Block]

Dec. 31, 2022

Carrying
amount

Contractual
cash flows

12 months
or less

13 - 36
months

37 - 60
months

More than
60 months

Assets used to manage liquidity risk

Cash

225,665

Restricted cash

486

Trade and other receivables

87,638

Non-hedge derivative assets

577

314,366

Non-derivative financial liabilities

Trade and other payables, including embedded derivatives

(195,872

)

(195,872

)

(195,872

)

Agreements with communities ¹

(42,493

)

(67,662

)

(8,421

)

(8,591

)

(7,688

)

(42,962

)

Deferred Rosemont acquisition consideration

(18,876

)

(20,000

)

(10,000

)

(10,000

)

Long-term debt

1,188,132

(1,541,669

)

(66,692

)

(132,852

)

(687,000

)

(655,125

)

Gold prepayment obligation ²

(71,208

)

(71,208

)

(71,208

)

Wheaton refund liability

6,383

(79,232

)

(79,232

)

866,066

(1,975,643

)

(352,193

)

(151,443

)

(694,688

)

(777,319

)

Derivative financial liabilities

Non hedge derivative contracts

(17,995

)

(17,995

)

(17,995

)

(17,995

)

(17,995

)

(17,995

)

Dec. 31, 2021		Carrying amount			Contractual cash flows			12 months or less			13 - 36 months			37 - 60 months			More than 60 months
Assets used to manage liquidity risk
Cash	$	270,989		$	270,989		$	270,989		$	-		$	-		$	-
Restricted cash		437			437			437
Trade and other receivables		172,890			172,890			172,890			-			-			-
Non-hedge derivative assets		7,430			7,430			7,430			-			-			-
	$	451,746		$	451,746		$	451,746		$	-		$	-		$	-
Non-derivative financial liabilities
Trade and other payables, including embedded derivatives	$	(189,179	)	$	(189,179	)	$	(189,179	)	$	-		$	-		$	-
Agreements with communities ¹		(36,273	)		(52,497	)		(9,282	)		(9,719	)		(5,220	)		(28,276	)
Deferred Rosemont acquisition consideration		(27,518	)		(30,000	)		(10,000	)		(20,000	)		-			-
Long-term debt, including embedded derivatives		(1,185,805	)		(1,614,686	)		(68,348	)		(136,696	)		(717,767	)		(691,875	)
Gold prepayment obligation ²		(140,008	)		(140,008	)		(71,394	)		(68,614	)		-			-
Wheaton refund liability		(5,424	)		(78,500	)		-			-			-			(78,500	)
	$	(1,584,207	)	$	(2,104,870	)	$	(348,203	)	$	(235,029	)	$	(722,987	)	$	(798,651	)
Derivative financial liabilities
Non-hedge derivative contracts	$	(12,451	)	$	(12,451	)	$	(12,451	)	$	-		$	-		$	-
	$	(12,451	)	$	(12,451	)	$	(12,451	)	$	-		$	-		$	-