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Derivative Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Derivative [Line Items]        
Provisional gain (loss) on derivatives and commodity contracts $ (71) $ (486) $ (319) $ 6
Unrealized gain (loss) on hedger, net of tax 12,842 34,245 (86) 29,027
Termination of gold zero cost collars $ 0 $ 0 0 $ 3,139
Designated as Hedging Instrument | Gold Forwards        
Derivative [Line Items]        
After tax gains in AOCI     9,300  
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months     9,300  
Designated as Hedging Instrument | Gold zero cost collars        
Derivative [Line Items]        
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