STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY 4 (Details) (USD $)	12 Months Ended					12 Months Ended						12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2011 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2012 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2010 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Total shares authorized [Member] [Domain]	Dec. 31, 2013 Employee Stock Option [Member]	Dec. 31, 2012 Employee Stock Option [Member]	Dec. 31, 2011 Employee Stock Option [Member]	Dec. 31, 2010 Employee Stock Option [Member]	Sep. 30, 2013 Stock Plan 2005 [Member]	Dec. 31, 2013 Ozmo Inc. Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Ozmo Inc. Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Value Assumed as Part of Acuisition	400,000
Additional shares approved for issuance (in shares)		25,000,000	19,000,000
Total shares authorized as of 12/31/13						158,000,000
Number of shares available for issuances							21,245,000	6,148,000	16,523,000	11,463,000
Restricted stock units issued												300,000	100,000
Weighted-average fair value of the rights to purchase shares (in dollars per share)		$ 8.84	$ 8.99	$ 8.71	$ 5.74							$ 6.17	$ 0.81
Share counted against the numerical limit for options available for grant on or after May 9, 2013	1.57
Shares counted against the numerical limit for options available for grant on or after May 18, 2011 (in shares)											1.61
Shares counted against the numerical limit for options available for grant prior to May 18, 2011 (in shares)											1.78
Share available for grant after ratio adjustment	13,500,000