Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Derivative [Line Items]
Provisional gain (loss) on derivatives and commodity contracts	$ 490	$ (249)
Unrealized gain (loss) on hedger, net of tax	(7,625)	$ (12,928)
Designated as Hedging Instrument \| Gold Forwards
Derivative [Line Items]
After tax gains in AOCI	6,100
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ 6,100

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after tax and reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

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-Topic 220
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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.

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