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Fair Value Measurements and Derivatives - Derivatives Measured at Fair Value and Disclosed by Balance Sheet Location (Detail) (USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2014
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Dec. 31, 2013
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | $ 11,524 | $ 27,471 |
| Derivative liabilities, fair value | 6,808 | 19,478 |
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Designated as Hedging Instrument | Fuel Swaps | Prepaid Expenses and Other Assets
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 7,020 | 5,024 |
| Derivative liabilities, fair value | 184 | 666 |
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Designated as Hedging Instrument | Fuel Swaps | Other long-term assets
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 4,351 | 6,869 |
| Derivative liabilities, fair value | 41 | 9 |
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Designated as Hedging Instrument | Fuel Swaps | Other long-term liabilities
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 14 | |
| Derivative liabilities, fair value | 26 | |
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Designated as Hedging Instrument | Fuel Collars | Prepaid Expenses and Other Assets
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 65 | 452 |
| Derivative liabilities, fair value | 9 | 195 |
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Designated as Hedging Instrument | Foreign Exchange Option | Accrued expenses and other liabilities
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | ||
| Derivative liabilities, fair value | 9,815 | |
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Designated as Hedging Instrument | Foreign Exchange Forward | Prepaid Expenses and Other Assets
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 2,624 | |
| Derivative liabilities, fair value | ||
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Designated as Hedging Instrument | Foreign Exchange Forward | Other long-term assets
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 88 | |
| Derivative liabilities, fair value | ||
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Designated as Hedging Instrument | Foreign Exchange Forward | Accrued expenses and other liabilities
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | ||
| Derivative liabilities, fair value | 6,582 | |
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Designated as Hedging Instrument | Foreign Currency Collar | Prepaid Expenses and Other Assets
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 12,502 | |
| Derivative liabilities, fair value | ||
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Designated as Hedging Instrument | Interest Rate Swap | Accrued expenses and other liabilities
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | ||
| Derivative liabilities, fair value | 3,201 | 1,707 |
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Designated as Hedging Instrument | Interest Rate Swap | Other long-term liabilities
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | ||
| Derivative liabilities, fair value | 3,581 | 1,374 |
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Not Designated as Hedging Instrument | Fuel Options | Prepaid Expenses and Other Assets
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | ||
| Derivative liabilities, fair value | $ 9 | $ 195 |