Business Combinations - Additional Information (Detail) (USD $)			1 Months Ended	0 Months Ended		0 Months Ended			1 Months Ended	12 Months Ended				6 Months Ended			0 Months Ended	6 Months Ended	0 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	May 31, 2012 Stock Option	May 31, 2014 HSW	May 30, 2014 HSW	May 31, 2014 HSW Media Content	May 30, 2014 HSW Media Content	May 30, 2014 HSW Proprietary Technology	Aug. 22, 2013 Monoprice, Inc	Dec. 31, 2013 Monoprice, Inc	Dec. 31, 2013 Monoprice, Inc Stock Option	Dec. 31, 2013 Monoprice, Inc RSUs vested	Dec. 31, 2013 Monoprice, Inc Performance-based restricted stock units (PSUs)	Jun. 30, 2014 Monoprice, Inc Business To Consumer Customer Relationships	Jun. 30, 2014 Monoprice, Inc Business To Business Customer Relationships	Jun. 30, 2014 Monoprice, Inc Personal Property Assets	Oct. 04, 2013 Balance Financial	Jun. 30, 2014 Balance Financial	May 31, 2014 Proprietary Technology HSW	May 30, 2014 Trade Names HSW
Business Acquisition [Line Items]
Cash paid for acquisition				$ 44,900,000					$ 182,909,000								$ 4,900,000
Business acquisition identifiable net assets acquired					4,500,000				26,091,000									1,000,000
Business acquisition Identifiable net asset acquired consisting intangible assets and deferred tax					25,400,000		18,200,000	1,300,000	68,900,000									800,000		5,900,000
Estimates lives of acquired intangible assets						10 years								2 years	7 years	6 years			4 years
Goodwill acquired	364,054,000	348,957,000			15,100,000				115,601,000									3,100,000
Date of acquisition				May 30, 2014					Aug. 22, 2013								Oct. 04, 2013
Indemnifications related to general representations and warranties																	700,000
Escrow period expire date																		Apr. 04, 2015
Working capital adjustment										400,000
Acquisition costs										700,000
Options, restricted stock units and performance stock units granted during the period to Monoprice employees			190,000								27,152	126,259	243,750
Gross contractual amount of trade accounts receivable acquired									3,200,000
Fair value of deferred revenue acquiree									1,300,000
Book value of deferred revenue prior to acquisition									$ 2,000,000