REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 669,768	$ 528,149	$ 1,317,155	$ 1,046,893
Payments revenue
Disaggregation of Revenue [Line Items]
Total revenue	430,029	366,101	862,673	741,413
Platform-related revenue
Disaggregation of Revenue [Line Items]
Total revenue	239,739	162,048	454,482	305,480
Revenue not from contract with customer	143,800	86,000	268,900	157,700
MyPay
Disaggregation of Revenue [Line Items]
Total revenue	114,800	77,700	218,700	142,000
MyPay \| Off-Balance Sheet Receivables
Disaggregation of Revenue [Line Items]
Total revenue	71,900	48,200	136,800	87,100
MyPay \| On-Balance Sheet Receivables
Disaggregation of Revenue [Line Items]
Total revenue	$ 42,900	$ 29,500	$ 81,900	$ 54,900

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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+ Details