OTHER ASSETS AND ACCOUNTS PAYABLE AND ACCRUED LIABILITIES - Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accounts payable		$ 13,400
Galaxy Digital Holdings, LP
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Compensation and compensation related	$ 20,490	71,553	$ 50,556
Professional fees	7,871	5,684	7,755
Promissory note	109,004	96,933	67,246
Legal settlement	78,165	40,000	0
Mining payables and accrued liabilities	1,269	9,385	1,447
Payable for digital asset trades	15,028	20,970	4,176
Interest	27,169	15,530	4,595
Payable for investments and acquisitions	4,447	11,054	0
Accounts payable	3,713	6,910	2,569
Other	3,312	3,512	2,032
Accounts payable and accrued liabilities	$ 270,468	$ 281,531	$ 140,376

Crypto Asset, Trades Payable, Current

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Investments and Acquisitions Payable, Current

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Mining Payables And Accrued Liabilities, Current

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer.

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Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

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Obligations not otherwise itemized or categorized in the footnotes to the financial statements that are due within one year or operating cycle, if longer, from the balance sheet date.

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