LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Convertiable Notes Tables (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended						12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 2013 Convertible Notes [Member]	Apr. 30, 2012 2013 Convertible Notes [Member]	Mar. 31, 2008 2013 Convertible Notes [Member]	Dec. 31, 2012 2015 Convertible Notes [Member]
Debt Instrument Rollforward [Roll Forward]
Principal Amount of Liability Component, Beginning Balance				$ 129,660	$ 20,647	$ 475,000	$ 261,034
Principal Amount of Liability Component, Extinguish of debt				(109,013)
Principal Amount of Liability Component, Ending Balance					20,647	475,000	261,034
Unamortized Discount, Beginning Balance				(8,430)			(37,693)
Unamortized Discount, Extinguishment of debt				4,537
Amortization of debt issuance discount	(5,999)	(17,379)	(21,299)	3,688			8,471
Unamortized Discount, Ending Balance				(205)			(29,222)
Net Carrying Value, Beginning Balance	1,243,207			121,230			223,341
Net Carrying Value, Extinguishment of debt				(104,476)
Net Carrying Value, Ending Balance	1,213,423	1,243,207		20,442			231,812
Equity Component, Beginning Balance				102,369			11,907
Equity Component, Extinguishment of Debt				(868)
Equity Component, Ending Balance				$ 101,501			$ 11,907