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ACQUISITIONS AND DIVESTITURES - Narrative (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Nov. 17, 2022
USD ($)
Jul. 06, 2022
USD ($)
$ / shares
shares
Apr. 14, 2022
USD ($)
Oct. 21, 2021
USD ($)
Sep. 16, 2020
USD ($)
Sep. 15, 2020
USD ($)
shares
Dec. 31, 2022
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Nov. 16, 2022
USD ($)
Business Acquisition [Line Items]                        
Equity method investments             $ 395   $ 395 $ 4,918    
Gain on acquisition of Kartaltepe                 81,852 0 $ 0  
Mineral properties, plant and equipment, net             3,549,446   3,549,446 3,249,764    
Deferred income tax liabilities             342,401   342,401 338,788    
Non-controlling interest             546,462   546,462 514,661    
Other operating expenses, net                 0 8,595 20,813  
Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]       Impairment of long-lived and other assets                
Pitarrilla Project | Disposal Group, Disposed of by Sale, Not Discontinued Operations                        
Business Acquisition [Line Items]                        
Consideration in cash   $ 35,000                    
Consideration in equity   $ 25,600                    
Consideration in equity (in shares) | shares   8,577,380                    
Share price (in dollars per share) | $ / shares   $ 2.99                    
Gain on sale of assets   $ 600                    
Pitarrilla Project | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Smelter                        
Business Acquisition [Line Items]                        
Royalty fee, percentage   1.25%                    
Royalty Portfolio | Disposal Group, Disposed of by Sale, Not Discontinued Operations                        
Business Acquisition [Line Items]                        
Consideration in cash       $ 87,900                
Carrying value       83,900                
Loss on impairment               $ 22,300        
Gain on disposal       2,100                
Transaction costs       $ 300                
Royalty Portfolio | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Measurement Input, Discount Rate                        
Business Acquisition [Line Items]                        
Deferred consideration, rate       0.125                
Alacer                        
Business Acquisition [Line Items]                        
Percentage of voting interests acquired         57.00%              
Percentage of voting interests held by former shareholders         43.00%              
Consideration transferred           $ 2,200,000            
Other operating expenses, net                   $ 6,900 20,800  
Severance and termination payments                     11,000  
Revenue                     205,500  
Net income                     $ 24,100  
Alacer | Common shares                        
Business Acquisition [Line Items]                        
Equity interests issued and issuable, entity shares issued per acquiree, ratio         0.3246              
Equity interest issued or issuable, number of shares (in shares) | shares           95,699,911            
Consideration transferred         $ 2,179,647              
Taiga Gold Corporation                        
Business Acquisition [Line Items]                        
Asset acquisition, consideration transferred     $ 24,800           24,800      
Asset acquisition, cash and equivalents     4,700           $ 4,700      
Asset acquisition, exploration and evaluation assets     27,800                  
Asset acquisition, deferred tax liability     $ 7,500                  
Kartaltepe                        
Business Acquisition [Line Items]                        
Gain on acquisition of Kartaltepe             $ 81,900          
Variable interest entity, initial measurement, recognized identifiable assets acquired and liabilities assumed, net $ 284,700                      
Kartaltepe | Lidya’s                        
Business Acquisition [Line Items]                        
Non-controlling interest $ 48,600                      
Ownership percentage by noncontrolling owners 20.00%                      
Kartaltepe | Variable Interest Entity, Primary Beneficiary                        
Business Acquisition [Line Items]                        
Ownership percentage 80.00%                      
Anagold | Alacer                        
Business Acquisition [Line Items]                        
Ownership percentage by parent         80.00%              
Lidya’s | Alacer                        
Business Acquisition [Line Items]                        
Ownership percentage by noncontrolling owners         20.00%              
Kartaltepe                        
Business Acquisition [Line Items]                        
Additional ownership percentage acquired 30.00%           30.00%   30.00%      
Payments to acquire interest in joint venture $ 150,000               $ 150,000      
Ownership percentage                       50.00%
Equity method investments                       $ 4,200
Kartaltepe | Variable Interest Entity, Primary Beneficiary                        
Business Acquisition [Line Items]                        
Mineral properties, plant and equipment, net 361,600                      
Deferred income tax liabilities $ 72,300