THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Revenue from major customers
Number of countries where brands and products reach users	200		200
Revenue	$ 782,231	$ 756,872	$ 2,278,793	$ 2,298,532
Accounts receivable, net of allowance of $11,951 and $8,540 respectively	235,035		235,035		207,408
Google Inc.
Revenue from major customers
Revenue	351,400	369,900	1,100,000	1,200,000
Accounts receivable, net of allowance of $11,951 and $8,540 respectively	$ 112,100		$ 112,100		$ 112,300