Fair Value Measurements and Derivatives - Effects of Derivatives Not Designated as Hedging Instruments on Consolidated Statements of Operations (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended |
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Sep. 30, 2020 |
Sep. 30, 2020 |
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| Derivatives not designated as hedging instruments | Cash Flow Hedging | Other income (expense), net | Fuel contracts | ||
| Derivative Instruments Gain Loss [Line Items] | ||
| Amount of Gain (Loss) Recognized in Income | $ (17) | $ 3,629 |
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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 Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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