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Derivative Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Derivative [Line Items]      
Provisional gain (loss) on derivatives and commodity contracts $ 365 $ (490) $ 959
Unrealized gain (loss) on hedger, net of tax 37,445 22,783 (12,434)
Termination of gold zero cost collars 3,139 0 0
Designated as Hedging Instrument      
Derivative [Line Items]      
Gains (losses) reclassified from AOCI into net income - effective portion: (23,890) (12,859) 1,434
Gains (losses) recognized in OCI - effective portion: 37,445 22,783 (12,434)
Designated as Hedging Instrument | Gold zero cost collars      
Derivative [Line Items]      
Gains (losses) reclassified from AOCI into net income - effective portion: 4,598 938 7,598
Gains (losses) recognized in OCI - effective portion: (4,598) 22,733 (32,345)
Unrealized gain (loss) on hedger, net of tax 7,700    
Termination of gold zero cost collars 3,100    
Termination of zero gold cost collars recorded to other comprehensive income (loss) 4,600    
Designated as Hedging Instrument | Gold Forwards      
Derivative [Line Items]      
After tax gains in AOCI 12,300    
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months 12,300    
Gains (losses) reclassified from AOCI into net income - effective portion: (28,488) 0 0
Gains (losses) recognized in OCI - effective portion: $ 42,043 $ 0 $ 0