LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Convertible Notes Tables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Debt Instrument Rollforward [Roll Forward]
Amortization of debt issuance discount	$ 1,821	$ 2,116	$ 5,344	$ 4,084
Net Carrying Amount, Beginning Balance			1,213,423
Net Carrying Amount, Ending Balance	940,537		940,537
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			6,911
Unamortized Discount, Ending Balance	(22,311)		(22,311)
Net Carrying Amount, Beginning Balance			231,812
Net Carrying Amount, Ending Balance	238,723		238,723
Equity Component, Beginning Balance			11,907
Equity Component, Ending Balance	$ 11,907		$ 11,907