Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 19,647	$ 24,299
Accumulated depreciation	(13,466)	(17,059)
Property and equipment, net	6,181	7,240
Land and Office Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	7,069	7,758
Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	6,227	6,593
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	6,277	9,875
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 74	$ 73