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INCOME AND MINING TAXES - Effective Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income before income and mining taxes	$ 414,758	$ 201,791	$ 136,657
Statutory tax rate	27.00%	27.00%	27.00%
Expected income and mining tax expense	$ 111,985	$ 54,484	$ 36,897
Increase (decrease) attributable to:
Non-taxable items	(4,379)	(22,236)	(7,518)
Foreign exchange and inflation	(124,946)	(676)	1,650
Differences in foreign and future tax rates	738	(10,641)	(8,699)
Investment incentive tax credits	(14,082)	1,983	0
Mining taxes and overseas withholding tax	17,528	17,006	10,207
Expired losses	1,455	1,129	738
Change in estimates in respect of prior years	(2,046)	(1,616)	(2,316)
Changes in recognition of deferred tax assets	1,086	3,550	4,074
Other	(1,455)	220	406
Total income tax provision (benefit)	$ (14,116)	$ 43,203	$ 35,439

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