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Discontinued Operations - Schedule of Gain (Loss) on Disposal Activity (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Loss On Disposal Of Discontinued Operations [Line Items]  
Loss on disposal of discontinued operations $ (41,095)
Advertising Business [Member]  
Loss On Disposal Of Discontinued Operations [Line Items]  
Write-off of goodwill (35,472)
Write-off of intangible assets (4,080)
Write-off of long-term deferred assets (517)
Lease agreements early termination compensation expenses (1,211)
Employee severance compensation expenses (191)
Gain on write-off of acquisition consideration payable 463
Loss on disposal of equity interests (87)
Loss on disposal of discontinued operations $ (41,095)