Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 153,713	$ 136,123
Less—accumulated depreciation and amortization	(106,365)	(93,826)
Depreciable assets, net	47,348	42,297
Land	1,185	1,241
Property and equipment, net	$ 48,533	43,538
Buildings
Property, Plant and Equipment [Line Items]
Useful life in years	30 years
Property and equipment, gross	$ 1,359	1,437
Data processing equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 141,359	124,897
Data processing equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life in years	3 years
Data processing equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life in years	5 years
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 7,718	6,691
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life in years	3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life in years	20 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 3,277	$ 3,098
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life in years	5 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life in years	10 years