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FINANCIAL MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Carrying Value	$ (1,080,000)us-gaap_LongTermDebt	$ (1,080,000)us-gaap_LongTermDebt
Carrying Value
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Carrying Value	(1,080,000)	(1,080,000)
Fair Value
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Fair Value	$ (1,099,813)	$ (1,058,396)

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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