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EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2023
Equity [Abstract] |
Schedule of Share-based Payment Arrangement, Expensed and Capitalized, Amount | Stock-based compensation expense has been recognized as follows (in thousands):
|  | Year Ended December 31,
|  | 2023 |  | 2022 |  | 2021
Cost of sales (1) |  | $ | 536 |  |  | $ | 797 |  |  | $ | 1,105 |
General and administrative expense |  |  | 4,634 |  |  |  | 5,579 |  |  |  | 11,867 |
Exploration, evaluation and reclamation expense |  |  | — |  |  |  | 97 |  |  |  | 105 |
Other operating expenses, net |  |  | — |  |  |  | — |  |  |  | 1,722 |
|  | $ | 5,170 |  |  | $ | 6,473 |  |  | $ | 14,799 |
(1) Excludes depreciation, depletion, and amortization.
Schedule of Share-based Payment Arrangement, Deferred Share Units, Activity | The following table summarizes the changes in DSUs and DSU Replacement Units outstanding during the year ended December 31, 2023 (in thousands except per share amounts):
|  | Number of Shares |  | Weighted Grant Date Fair Value Per Share |  | Aggregate Intrinsic Value
Balance as of January 1, 2023 |  | 532 |  |  | $ | 26.46 |  |  |  |
Granted |  | 93 |  |  |  | 14.59 |  |  |  |
Exercised/Released |  | (6) |  |  |  | 15.84 |  |  |  |
Canceled/Forfeited |  | — |  |  |  | — |  |  |  |
Reinvested |  | 12 |  |  |  | 14.74 |  |  |  |
Balance as of December 31, 2023 |  | 631 |  |  |  | 24.58 |  |  | $ | 6,785 |
Schedule of Share-based Payment Arrangement, Restricted Stock Units, Activity | The following table summarizes the changes in RSUs outstanding during the year ended December 31, 2023 (in thousands except per share amounts):
|  | Number of Shares |  | Weighted Average Grant Date Fair Value |  | Aggregate intrinsic value
Balance as of January 1, 2023 |  | 579 |  |  | $ | 21.49 |  |  |  |
Granted |  | 578 |  |  |  | 15.00 |  |  |  |
Exercised/Released |  | (251) |  |  |  | 17.81 |  |  |  |
Canceled/Forfeited |  | (114) |  |  |  | 21.58 |  |  |  |
Reinvested |  | 15 |  |  |  | 22.15 |  |  |  |
Balance as of December 31, 2023 |  | 807 |  |  |  | 17.96 |  |  | $ | 8,679 |
Schedule of Share-based Payment Arrangement, Performance Shares, Activity | The following table summarizes the changes in PSUs outstanding during the year ended December 31, 2023:
|  | Number of Shares |  | Weighted Average Grant Date Fair Value |  | Aggregate Intrinsic Value
Balance as of January 1, 2023 |  | 649 |  |  | $ | 24.49 |  |  |  |
Granted |  | 434 |  |  |  | 14.98 |  |  |  |
Exercised/Released |  | (185) |  |  |  | 21.16 |  |  |  |
Canceled/Forfeited |  | (33) |  |  |  | 16.27 |  |  |  |
Reinvested |  | 16 |  |  |  | 16.22 |  |  |  |
Balance as of December 31, 2023 |  | 881 |  |  |  | 20.67 |  |  | $ | 9,482 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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