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INCOME (LOSS) PER SHARE - Calculation of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Net income (loss) $ 54,446 $ (358,162)
Net (income) loss attributable to non-controlling interest 4,335 71,080
Net income (loss) attributable to SSR Mining shareholders 58,781 (287,082)
Interest saving on 2019 Notes, net of tax 1,232 0
Net income (loss) used in the calculation of diluted net income per share $ 60,013 $ (287,082)
Weighted average number of common shares issued (in shares) 202,420 202,355
Adjustments for dilutive instruments, convertible notes (in shares) 12,981 0
Diluted weighted average number of shares outstanding (in shares) 216,546 202,355
Net income (loss) per share attributable to SSR Mining shareholders    
Basic (in dollars per share) $ 0.29 $ (1.42)
Diluted (in dollars per share) $ 0.28 $ (1.42)
Restricted share units    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Adjustments for dilutive instruments (in shares) 1,145 0