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FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Details 2) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Current maturities of long-term debt | $ 0 | $ (15,844) |
| Long-term debt, net of current maturities | (580,000) | (580,000) |
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Carrying Value
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Current maturities of long-term debt | 0 | (15,844) |
| Long-term debt, net of current maturities | (580,000) | (580,000) |
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Fair Value
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||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Current maturities of long-term debt | 0 | (15,875) |
| Long-term debt, net of current maturities | $ (554,419) | $ (581,994) |