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Hedging Activities - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2016 Contract
Fuel Contract |
Derivatives And Hedging Activities [Line Items] |
Fuel hedging contracts outstanding | 0
Fuel Contract | Cash Flow Hedging | Designated as Hedging Instrument |
Derivatives And Hedging Activities [Line Items] |
Fuel hedges expiration date | 2016-12
Foreign Currency Derivatives |
Derivatives And Hedging Activities [Line Items] |
Foreign currency contracts outstanding | 0
Foreign Currency Derivatives | Cash Flow Hedging | Designated as Hedging Instrument |
Derivatives And Hedging Activities [Line Items] |
Derivative instrument expiration date | 2016-12

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- Definition Derivatives And Hedging Activities [Line Items] + References No definition available. + Details
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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959 + Details
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- Definition Number of foreign currency exchange rate derivatives held by the entity at the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959 + Details
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