Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 23,934	$ 24,441
Accumulated depreciation and amortization	(17,585)	(17,216)
Property and equipment, net	6,349	7,225
Land and Office Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	8,176	8,108
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	5,890	6,639
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	9,333	9,258
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	74	74
Finance Lease Right-of-use Assets [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 461	$ 362