Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets:
Fair value of other derivative instruments, net		$ 13,747
Assets	$ 132,283	27,171
Liabilities:
Total liabilities	1,374	24,950
Provisional metal sales contracts
Assets:
Fair value of other derivative instruments, net	86	481
Liabilities:
Fair value of derivative liability	162	67
Gold zero cost collars
Liabilities:
Fair value of derivative liability	1,212	24,883
Equity Securities
Liabilities:
Marketable Securities, Noncurrent	132,197	12,943
Equity and debt securities
Liabilities:
Marketable Securities, Noncurrent		12,943
Level 1
Assets:
Assets	132,197	12,943
Liabilities:
Total liabilities	0	0
Level 1 \| Provisional metal sales contracts
Assets:
Fair value of other derivative instruments, net	0	0
Liabilities:
Fair value of derivative liability	0	0
Level 1 \| Gold zero cost collars
Liabilities:
Fair value of derivative liability	0	0
Level 1 \| Foreign Exchange Forward
Assets:
Fair value of other derivative instruments, net		0
Level 1 \| Equity Securities
Liabilities:
Marketable Securities, Noncurrent	132,197
Level 1 \| Equity and debt securities
Liabilities:
Marketable Securities, Noncurrent		12,943
Level 2
Assets:
Assets	86	14,228
Liabilities:
Total liabilities	1,374	24,950
Level 2 \| Provisional metal sales contracts
Assets:
Fair value of other derivative instruments, net	86	481
Liabilities:
Fair value of derivative liability	162	67
Level 2 \| Gold zero cost collars
Liabilities:
Fair value of derivative liability	1,212	24,883
Level 2 \| Foreign Exchange Forward
Assets:
Fair value of other derivative instruments, net		13,747
Level 2 \| Equity Securities
Liabilities:
Marketable Securities, Noncurrent	0
Level 2 \| Equity and debt securities
Liabilities:
Marketable Securities, Noncurrent		0
Level 3
Assets:
Assets	0	0
Liabilities:
Total liabilities	0	0
Level 3 \| Provisional metal sales contracts
Assets:
Fair value of other derivative instruments, net	0	0
Liabilities:
Fair value of derivative liability	0	0
Level 3 \| Gold zero cost collars
Liabilities:
Fair value of derivative liability	0	0
Level 3 \| Foreign Exchange Forward
Assets:
Fair value of other derivative instruments, net		0
Level 3 \| Equity Securities
Liabilities:
Marketable Securities, Noncurrent	$ 0
Level 3 \| Equity and debt securities
Liabilities:
Marketable Securities, Noncurrent		$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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