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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES Balance Sheet Location (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative liability | $ (5,478) | [1] | $ (4,873) | [1]
Other current liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative liability | (333) | [1] | (214) | [1]
Other non-current liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative liability | (5,145) | [1] | (4,659) | [1]
Prepaid and other current assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative asset | 3,949 | [1] | 1,781 | [1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency exchange contracts [Member] | Other current liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative liability | (84) | [1] | 0 | [1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency exchange contracts [Member] | Prepaid and other current assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative asset | 2,616 | [1] | 915 | [1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency option contracts [Member] | Other current liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative liability | (90) | [1] | (214) | [1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign currency option contracts [Member] | Prepaid and other current assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative asset | 1,333 | [1] | 673 | [1]
Not Designated as Hedging Instrument [Member] | Foreign currency exchange contracts [Member] | Prepaid and other current assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative asset | 0 | [1] | 25 | [1]
Not Designated as Hedging Instrument [Member] | Foreign currency option contracts [Member] | Prepaid and other current assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative asset | 0 | [1] | 8 | [1]
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Other non-current liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative liability | (5,145) | [1] | (4,659) | [1]
Not Designated as Hedging Instrument [Member] | Fuel hedge contracts [Member] | Other current liabilities [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative liability | (159) | [1] | 0 | [1]
Not Designated as Hedging Instrument [Member] | Fuel hedge contracts [Member] | Prepaid and other current assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Fair value, derivative asset | $ 0 | [1] | $ 160 | [1]
[1] | See Note 11 — Fair Value Measurements for further information on the fair value of our derivatives including their classification within the fair value hierarchy.

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