Entity Wide Disclosures - Summary of Property and Equipment, Net by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2019
Property and equipment, net:
Property and equipment, net	$ 93,153	$ 85,017	$ 37,613
U.S.
Property and equipment, net:
Property and equipment, net	64,828	58,124
Europe, Belgium
Property and equipment, net:
Property and equipment, net	12,339	12,024
Europe, Other
Property and equipment, net:
Property and equipment, net	8,413	7,961
Europe
Property and equipment, net:
Property and equipment, net	20,752	19,985
Other
Property and equipment, net:
Property and equipment, net	$ 7,573	$ 6,908