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Intangible Assets, Net and Goodwill - Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Jun. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 167,177 $ 162,213
Accumulated Amortization (105,451) (89,769)
Net Carrying Amount 61,726 72,444
Customer/publisher/advertiser relationships [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 37,049 37,045
Accumulated Amortization (26,237) (23,017)
Net Carrying Amount 10,812 14,028
Content [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 62,095 62,076
Accumulated Amortization (38,933) (34,430)
Net Carrying Amount 23,162 27,646
Website/trade/domain names [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 31,622 31,615
Accumulated Amortization (15,202) (12,815)
Net Carrying Amount 16,420 18,800
Acquired technology and others [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 36,411 31,477
Accumulated Amortization (25,079) (19,507)
Net Carrying Amount $ 11,332 $ 11,970