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FAIR VALUE MEASUREMENTS - Narrative (Details) - Galaxy Digital Holdings, LP - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying value | $ 2,928,225 | $ 1,088,171
Transfers in of Level 3 | 21,200 | 67,300
Transfers out of Level 3 | 48,700 | 31,600
Digital intangible assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Carrying value | $ 550,200 | $ 277,600

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