Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Total property and equipment at cost	$ 59,147	$ 56,108
Less: accumulated depreciation	(38,188)	(32,532)
Total property and equipment, net	20,959	23,576
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment at cost	7,963	7,659
Computer Equipment and Related Software
Property Plant And Equipment [Line Items]
Total property and equipment at cost	45,504	30,256
Furniture and Office Equipment
Property Plant And Equipment [Line Items]
Total property and equipment at cost	4,418	6,173
Capital Projects in Process
Property Plant And Equipment [Line Items]
Total property and equipment at cost	$ 1,262	$ 12,020