Summary of Significant Accounting Policies - Schedule of Settlement and Merchant Reserve Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Settlement And Merchant Reserve Assets And Liabilities [Abstract]
Settlement assets	$ 228,679	$ 260,712
Merchant reserve assets	12,076	13,987
Total	240,755	274,699	$ 193,371
Settlement liabilities	226,684	259,825
Merchant reserve liabilities	12,099	13,992
Total	$ 238,783	$ 273,817