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INTEREST RATE SWAP AGREEMENTS (Details 2) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 item | Dec. 31, 2012
--- | --- | ---
Liability Derivatives |  |
Fair value of derivative instruments | $ 11,370 | $ 7
Fair value of derivative instruments (Noncurrent Liabilities) |  | 16,045
Total Derivatives | 11,370 | 16,052
Number of interest rate swaps previously classified as a long-term liability | 1 |
Interest rate contracts | Derivatives designated as hedging instruments |  |
Liability Derivatives |  |
Fair value of derivative instruments | 11,370 | 7
Fair value of derivative instruments (Noncurrent Liabilities) |  | 16,045
Total Derivatives | $ 11,370 | $ 16,052

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