Significant Accounting Policies -Presentation of Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Cash and cash equivalents	$ 187,672	$ 14,642
Customer funds	22,541	20,924
Restricted cash	2,596	3,277
Total cash, cash equivalents, and restricted cash	$ 212,809	$ 38,843	$ 25,862	$ 21,016