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Derivative Financial Instruments and Hedging Activities - Notional Amounts (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013
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Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount (in USD) | $ 7,020 | [1]
Foreign Exchange Option [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount (in USD) | 30,000 | [1]
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount (in USD) | 172,497 | [1]
Fuel [Member] | Not Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount (in thousands of barrels) | 40,000 | [1]
Cash Flow Hedging [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount (in USD) | 19,000 | [1]
Cash Flow Hedging [Member] | Foreign Exchange Option [Member] | Designated as Hedging Instrument [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount (in USD) | $ 26,000 | [1]
[1] | All notional amounts are stated in 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
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

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- Details
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