LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Convertiable Notes Tables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Debt Instrument Rollforward [Roll Forward]
Amortization of debt issuance discount	$ 1,687	$ (1,590)	$ 3,523	$ 1,968
Net Carrying Amount, Beginning Balance			1,213,423
Net Carrying Amount, Ending Balance	916,574		916,574
2015 Convertible Notes [Member]
Debt Instrument Rollforward [Roll Forward]
Principal Amount of Liability Component, Beginning Balance			261,034
Principal Amount of Liability Component, Ending Balance	261,034		261,034
Unamortized Discount, Beginning Balance			(29,222)
Amortization of debt issuance discount			4,579
Unamortized Discount, Ending Balance	(24,643)		(24,643)
Net Carrying Amount, Beginning Balance			231,812
Net Carrying Amount, Ending Balance	236,391		236,391
Equity Component, Beginning Balance			11,907
Equity Component, Ending Balance	$ 11,907		$ 11,907