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INCOME AND MINING TAXES - Reconciliation of Tax Provision (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
INCOME AND MINING TAXES. |  |  |
Loss before income and mining taxes | $ (80,288) | $ (64,199) | $ (153,715)
Statutory tax rate (as a percent) | 21.00% | 21.00% | 21.00%
US Federal and State tax recovery (expense) at statutory rate | $ (16,860) | $ (13,482) | $ (32,280)
Reconciling items: |  |  |
Equity pickup in MSC | (583) | 1,326 | 374
Deferred foreign income inclusion |  |  | 795
Realized flow-through expenditures | 2,169 | 6,148 | 496
Realized flow-through premium | (2,011) | (3,486) | (338)
Adjustment for foreign tax rates | (8,384) | (3,039) | (2,043)
Deferred mining tax liability | 116 |  |
Other permanent differences | 31,369 | 9,353 | (2,546)
NOL expires and revisions |  | 241 | 1,066
Valuation allowance | (10) | (4,377) | 33,086
Tax benefit | $ 5,806 | $ (7,315) | $ (1,390)

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