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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES Notional Amounts (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2014 | Dec. 31, 2013
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Foreign currency exchange contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Notional Amount | $ 0 | [1] | $ 1,950 | [1]
Foreign currency option contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Notional Amount | 0 | [1] | 4,000 | [1]
Interest rate swaps [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Notional Amount | 179,066 | [1] | 183,851 | [1]
Fuel hedge contracts [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Notional Amount (in thousands of barrels) | 25,000 | [1] | 38,000 | [1]
Cash Flow Hedging [Member] | Foreign currency exchange contracts [Member] | Designated as Hedging Instrument [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Notional Amount | 37,064 | [1] | 32,300 | [1]
Cash Flow Hedging [Member] | Foreign currency option contracts [Member] | Designated as Hedging Instrument [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Notional Amount | $ 37,500 | [1] | $ 38,000 | [1]
[1] | All notional amounts are stated in thousands of dollars except fuel contracts which are denominated in thousands of barrels.

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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