OTHER ASSETS (Details Narrative) (USD $)	3 Months Ended
	Mar. 31, 2014 Convertible Debt Converted Debt [Member]	Mar. 31, 2012 1.00% Convertible Senior Notes Due March 2018 [Member]	Mar. 31, 2010 1.25% Convertible Senior Notes due March 2015 [Member]	May 31, 2013 0.35 % Senior Convertible Notes Due June 2020 [Member]	Oct. 31, 2011 Revolving Credit Facility [Member]
Debt Instrument
Aggregate principal amount		$ 1,000,000,000	$ 575,000,000	$ 1,000,000,000
Interest rate on Convertible Senior Notes		1.00%	1.25%	0.35%
Line of credit facility, current borrowing capacity					1,000,000,000
Write off of deferred debt issuance cost	$ 300,000