THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 visit brand country	Mar. 31, 2013	Dec. 31, 2013
Revenue from major customers
Minimum number of brands owned by the company	150
Number of monthly visits to company websites	1,000,000,000
Number of countries where the company has consumer audiences	100
Revenue	$ 740,247	$ 742,249
Accounts receivable, net of allowance of $9,523 and $8,540 respectively	241,017		207,408
Google Inc.
Revenue from major customers
Revenue	355,600	376,100
Accounts receivable, net of allowance of $9,523 and $8,540 respectively	$ 128,000		$ 112,300