Derivative Financial Instruments - Summary of Pre-tax Gains (Losses) On Derivatives Designated as Cash Flow Hedges (Details) - Designated as Hedging Instrument - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in OCI - effective portion:	$ 34,245	$ (2,982)	$ 29,027	$ 24,376
Gains (losses) reclassified from AOCI into net income - effective portion:	(1,731)	(3,061)	(1,271)	(5,783)
Gold zero cost collars
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in OCI - effective portion:	0	(4,571)	(3,386)	23,976
Gains (losses) reclassified from AOCI into net income - effective portion:	1,379	437	1,839	828
Foreign Exchange Forward
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in OCI - effective portion:	0	1,589	0	400
Gains (losses) reclassified from AOCI into net income - effective portion:	0	(3,498)	0	(6,611)
Gold Forwards
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in OCI - effective portion:	34,245	0	32,413	0
Gains (losses) reclassified from AOCI into net income - effective portion:	$ (3,110)	$ 0	$ (3,110)	$ 0