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ACQUISITIONS (Details - Schedule of Assets Acquired and Liabilities Assumed for Apartments.com) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Apr. 01, 2014
Dec. 31, 2013
Business Acquisition [Line Items]        
Goodwill $ 1,246,789 $ 1,138,805   $ 718,587
Apartments.com [Member]        
Business Acquisition [Line Items]        
Accounts receivable     $ 11,402  
Goodwill     421,724  
Other assets and liabilities     (2,866)  
Fair value of identifiable net assets acquired     584,218  
Apartments.com [Member] | Trade Names and Other Intangible Assets [Member]        
Business Acquisition [Line Items]        
Intangible assets, other than goodwill     71,779  
Apartments.com [Member] | Customer Contracts [Member]        
Business Acquisition [Line Items]        
Intangible assets, other than goodwill     69,684  
Apartments.com [Member] | Developed Technology Rights [Member]        
Business Acquisition [Line Items]        
Intangible assets, other than goodwill     11,489  
Apartments.com [Member] | Building Photography [Member]        
Business Acquisition [Line Items]        
Intangible assets, other than goodwill     $ 1,006