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ACQUISITIONS AND DIVESTITURES - Business Acquisition, Pro Forma Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Business Combination, Pro Forma Information [Line Items]
CC&V transaction and integration costs	$ 7,287	$ 0	$ 19,040	$ 0
CC&V
Business Combination, Pro Forma Information [Line Items]
Revenue		351,289	1,196,070	904,984
Net income attributable to SSR Mining shareholders		$ 47,103	$ 249,778	$ (180,094)

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