DEBT (Tables)

6 Months Ended

Jun. 30, 2012

Debt Disclosure [Abstract]

Schedule of convertible debt

Convertible debt as of June 30, 2012 consists of the following (in thousands): 

June 30, 2012	Outstanding Principal  Amount		Unamortized Debt Discount			Carrying Value
1.25% Convertible Senior Notes due March 2015	$	575,000	$	(66,174	)	$	508,826
1.0% Convertible Senior Notes due March 2018	1,000,000		(128,333		)	871,667
Outstanding convertible debt	$	1,575,000	$	(194,507	)	$	1,380,493

Convertible debt as of December 31, 2011 consisted of the following (in thousands): 

December 31, 2011	Outstanding Principal  Amount		Unamortized Debt Discount			Carrying Value
1.25% Convertible Senior Notes due March 2015	$	575,000	$	(77,360	)	$	497,640