Summary of Significant Accounting Policies - Schedule of Settlement and Merchant Reserve Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Settlement And Merchant Reserve Assets And Liabilities [Abstract]
Settlement assets	$ 171,505	$ 149,785
Merchant reserve assets	14,762	16,246
Total	186,267	166,031	$ 181,106
Settlement liabilities	170,514	148,818
Merchant reserve liabilities	14,762	16,246
Total	$ 185,276	$ 165,064