Fair Value Measurements and Derivatives - Effects of Derivatives Designated as Cash Flow Hedges (Details 2) - Cash Flow Hedging - Designated as Hedging Instrument - Fuel Swaps - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2017 |
Jun. 30, 2016 |
Jun. 30, 2017 |
Jun. 30, 2016 |
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| Derivative Instruments, Gain (Loss) [Line Items] | ||||
| Gain (loss) recognized in other comprehensive income - effective portion | $ (4,884) | $ 85,808 | $ (31,087) | $ 76,302 |
| Loss recognized in other income (expense), net - ineffective portion | (431) | (3,524) | (801) | (8,751) |
| Amount reclassified from accumulated other comprehensive income (loss) into fuel expense | $ 8,584 | $ 20,440 | $ 16,587 | $ 51,577 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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