Summary of Significant Accounting Policies - Schedule of Settlement and Merchant Reserve Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Settlement And Merchant Reserve Assets And Liabilities [Abstract]
Settlement assets	$ 148,808	$ 171,505
Merchant reserve assets	14,337	14,762
Total	163,145	186,267	$ 125,136
Settlement liabilities	147,445	170,514
Merchant reserve liabilities	14,337	14,762
Total	$ 161,782	$ 185,276