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COMMITMENTS AND CONTINGENCIES - Prepayment agreement (Details) - Auramet International LLC - Prepayment Agreement - Guarantee Obligation - Precious metal - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Other Commitments |  |  |
Net proceeds from sales on a Supplier Advance Basis | $ 41.2 | $ 4.8 | $ 93.4
Revenue from sales on a Supplier Advance Basis |  | 4.8 | $ 83.2
Remaining net proceeds recorded as deferred revenue |  | $ 0.0 |

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