Property and Equipment, Stated at Lower of Cost or Estimated Fair Value (Detail) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property and equipment		$ 57,813	$ 54,097
Accumulated depreciation and amortization		(32,767)	(30,866)
Property and equipment, net	[1]	25,046	23,231	$ 22,540
Land
Property, Plant and Equipment [Line Items]
Property and equipment		5,603	5,603
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment		17,115	16,809
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property and equipment		8,727	7,327
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment		1,141	1,622
Website development costs and other software
Property, Plant and Equipment [Line Items]
Property and equipment		13,987	11,678
Studios, computer and telephone equipment
Property, Plant and Equipment [Line Items]
Property and equipment		9,475	9,293
Warehouse and distribution equipment
Property, Plant and Equipment [Line Items]
Property and equipment		$ 1,765	$ 1,765

[1] Excludes other non-current assets (goodwill, long-term receivables, and investments) of $17.4 million, $25.5 million, and $22.3 million for 2015, 2014, and 2013, respectively.