Property and Equipment - Schedule of Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 24,098	$ 24,090
Accumulated depreciation	(16,549)	(16,379)
Property and equipment, net	7,549	7,711
Land and office building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	7,749	7,669
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	6,653	6,920
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	9,615	9,420
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 81	$ 81