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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 |
Sep. 30, 2014
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Dec. 31, 2013
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | $ 27,471 | |
| Derivative liabilities, fair value | 32,374 | 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 | 5,024 | |
| Derivative liabilities, fair value | 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 | 6,869 | |
| Derivative liabilities, fair value | 9 | |
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Designated as Hedging Instrument | Fuel Swaps | Accrued expenses and other liabilities
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 17 | |
| Derivative liabilities, fair value | 10,506 | |
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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 | 32 | |
| Derivative liabilities, fair value | 5,608 | |
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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 | 452 | |
| Derivative liabilities, fair value | 68 | 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 | 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 Exchange Forward | Other long-term liabilities
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| Derivatives, Fair Value [Line Items] | ||
| Derivative assets, fair value | 166 | |
| Derivative liabilities, fair value | 11,277 | |
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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 | 3,459 | 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 | 1,388 | 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 | $ 68 | $ 195 |