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Derivative Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2022
Derivative [Line Items]          
Provisional gain (loss) on derivatives and commodity contracts $ (486) $ (137) $ 6 $ (697)  
Unrealized gain (loss) on hedger, net of tax 34,245 (2,982) 29,027 24,376  
Termination of gold zero cost collars 0 0 3,139 0  
Designated as Hedging Instrument          
Derivative [Line Items]          
Gains (losses) reclassified from AOCI into net income - effective portion: (1,731) (3,061) (1,271) (5,783)  
Gains (losses) recognized in OCI - effective portion: 34,245 (2,982) 29,027 24,376  
Designated as Hedging Instrument | Gold zero cost collars          
Derivative [Line Items]          
After tax gains in AOCI     29,300    
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months     23,800    
Gains (losses) reclassified from AOCI into net income - effective portion: 1,379 437 1,839 828  
Gains (losses) recognized in OCI - effective portion: $ 0 $ (4,571) (3,386) $ 23,976  
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 zero cost collars | Forecast          
Derivative [Line Items]          
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax         $ 2,800