Property and Equipment, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 128,242	$ 122,499
Less—accumulated depreciation and amortization	(85,780)	(86,990)
Depreciable assets, net	42,462	35,509
Land	1,329	1,254
Property and equipment, net	$ 43,791	36,763
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	30 years
Property and equipment, gross	$ 1,542	1,440
Data processing equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 116,950	110,673
Data processing equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Data processing equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 6,936	7,761
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,814	$ 2,625
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years