LONG-TERM DEBT AND OTHER FINANCING ARRANGEMENTS Convertible Notes Tables (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Debt Instrument Rollforward [Roll Forward]
Amortization of debt issuance discount	$ 4,521,000	$ 1,687,000	$ 6,472,000	$ 3,523,000
Net Carrying Amount, Beginning Balance			956,956,000
Net Carrying Amount, Ending Balance	802,517,000		802,517,000
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			5,058,000
Unamortized Discount, Ending Balance	(14,783,000)		(14,783,000)
Net Carrying Amount, Beginning Balance			241,193,000
Net Carrying Amount, Ending Balance	246,251,000		246,251,000
Equity Component, Beginning Balance			11,907,000
Equity Component, Ending Balance	$ 11,907,000		$ 11,907,000