RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Related Party Transaction [Line Items]
Revenue	$ 1,497,208	$ 1,449,628	$ 3,531,503	$ 3,087,198
Customer custodial funds	5,121,640		5,121,640		$ 6,158,949
Customer custodial fund liabilities	5,121,640		5,121,640		6,158,949
Related Party
Related Party Transaction [Line Items]
Revenue	1,600	6,700	5,200	13,600
Amounts receivable from customers, net of allowance	1,300		1,300		2,700
Customer custodial funds	5,100		5,100		44,000
Customer custodial fund liabilities	5,100		5,100		$ 44,000
Professional and consulting services		300		1,400
Related Party \| Strategic Investments in Equity Securities, FV-NI and without Readily Determinable Fair Value
Related Party Transaction [Line Items]
Related party transaction	$ 4,700	$ 3,300	$ 7,800	$ 3,300

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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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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