Derivative Financial Instruments - Summary of Pre-tax Gains (Losses) On Derivatives Designated as Cash Flow Hedges (Details) - Designated as Hedging Instrument - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in OCI - effective portion:	$ 22,783	$ (12,434)	$ (136)
Gains (losses) reclassified from AOCI into net income - effective portion:	(12,859)	1,434	0
Gold zero cost collars
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in OCI - effective portion:	22,733	(32,345)	(136)
Gains (losses) reclassified from AOCI into net income - effective portion:	938	7,598	0
Foreign Exchange Forward
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gains (losses) recognized in OCI - effective portion:	50	19,911	0
Gains (losses) reclassified from AOCI into net income - effective portion:	$ (13,797)	$ (6,164)	$ 0