Fair Value Measurements and Derivatives - Effects of fuel swaps dedesignated and recognized into earnings (Details 3) - Dedesignated as Hedging Instrument - Fuel Swaps - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Derivatives Fair Value [Line Items] | |||
| Amount reclassified from accumulated other comprehensive income (loss) into other income (expense), net | $ 0 | $ 2,994 | $ 10,000 |
| Loss recognized in other income (expense), net | $ 0 | $ (271) | $ (4,727) |
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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 Amount of decrease in the fair value of derivatives recognized in the income statement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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