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Property, Equipment and Software - Summary of Property, Equipment and Software (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment $ 66,318 $ 60,570
Less accumulated depreciation and amortization (31,531) (27,144)
Property, Plant and Equipment, Gross 34,787 33,426
Land 1,490 1,490
Property, Plant and Equipment, Net 36,277 34,916
Buildings [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment 16,857 16,498
Office Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment 14,159 13,691
Computer Hardware and Software [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment 11,458 11,591
Software Development Costs [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment 23,332 18,353
Other [Member]    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment $ 512 $ 437