LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Convertible Notes Tables (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Debt Instrument Rollforward [Roll Forward]
Amortization of debt issuance discount	$ 6,115,000	$ 1,821,000	$ 12,587,000	$ 5,344,000
Net Carrying Amount, Beginning Balance			956,956,000
Net Carrying Amount, Ending Balance	782,176,000		782,176,000
2015 Convertible Notes [Member]
Debt Instrument Rollforward [Roll Forward]
Principal Amount of Liability Component, Beginning Balance			261,034,000
Principal Amount of Liability Component, Ending Balance	261,034,000		261,034,000
Unamortized Discount, Beginning Balance			(19,841,000)
Amortization of debt issuance discount			7,624,000
Unamortized Discount, Ending Balance	(12,217,000)		(12,217,000)
Net Carrying Amount, Beginning Balance			241,193,000
Net Carrying Amount, Ending Balance	248,817,000		248,817,000
Equity Component, Beginning Balance			11,907,000
Equity Component, Ending Balance	$ 11,907,000		$ 11,907,000