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FAIR VALUE MEASUREMENTS - Narrative (Details) - Galaxy Digital Holdings, LP - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	$ 2,653,369	$ 2,928,225	$ 1,088,171
Transfers in of Level 3	1,000	21,200	67,300
Transfers out of Level 3	12,900	48,700	31,600
Digital intangible assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value	$ 452,500	$ 550,200	$ 277,600

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Fair value of crypto asset. Excludes crypto asset held for platform user.

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