Supplementary Information - Summary of Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 98,198	$ 98,581
Less: accumulated depreciation and amortization	58,010	58,103
Property and equipment, net	40,188	40,478
Land [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	9,852	9,888
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	18,238	18,358
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	45,633	45,027
Furniture Equipment and Other [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	12,782	12,947
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	9,152	9,829
Right-of-Use Assets Under Finance Leases [Member]
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 2,541	$ 2,532