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Investment in Other Companies (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Investments in other companies |  |  |  |  |
Proceeds received from sale of Trip Linhas Aereas stock | $ 17,237,000 us-gaap_ProceedsFromSaleOfEquityMethodInvestments | $ 16,658,000 us-gaap_ProceedsFromSaleOfEquityMethodInvestments | $ 8,064,000 us-gaap_ProceedsFromSaleOfEquityMethodInvestments |  |
Trip Linhas Aereas [Member] |  |  |  |  |
Investments in other companies |  |  |  |  |
Company's investment balance |  |  | 42,000,000 us-gaap_CostMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_TripLinhasAereasMember |  |
Number of installments |  |  | 3 skyw_EquityMethodInvestmentNumberOfInstallmentsUnderPurchaseAgreementForPurchasePricePayment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_TripLinhasAereasMember |  |
Period of payment under the purchase agreement |  |  | 2 years |  |
Gain (loss) on equity method investments | 24,900,000 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_TripLinhasAereasMember |  |  |  |
Trip Linhas Aereas [Member] | Common Stock [Member] |  |  |  |  |
Investments in other companies |  |  |  |  |
Annual rate of return used to calculate the put option price (as a percent) |  |  | 20.00%skyw_CostMethodInvestmentPutOptionPriceInterestRatePercent / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_TripLinhasAereasMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Trip Investimentos Ltd | Sale of Interest in Equity Method Investment [Member] |  |  |  |  |
Investments in other companies |  |  |  |  |
Option to acquire ownership (as a percent) | 15.38%skyw_EquityMethodInvestmentOptionOfPercentageOwnershipAcquisitionReceivedUnderPurchaseAgreement / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_TripInvestimentosLtdaMember / us-gaap_SubsequentEventTypeAxis = skyw_SaleOfInterestInEquityMethodInvestmentMember |  |  |  |
Mekong Aviation Joint Stock Company [Member] |  |  |  |  |
Investments in other companies |  |  |  |  |
Percentage ownership acquired |  |  |  |  | 30.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_MekongAviationJointStockCompanyMember
Payments to acquire equity method investment |  |  |  | 3,000,000 us-gaap_PaymentsToAcquireEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_MekongAviationJointStockCompanyMember | 7,000,000 us-gaap_PaymentsToAcquireEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_MekongAviationJointStockCompanyMember
Gain on sale of cost method investment |  | 5,000,000 us-gaap_CostmethodInvestmentsRealizedGainLossExcludingOtherThanTemporaryImpairments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_MekongAviationJointStockCompanyMember |  |  |
Other income recognized on termination of sub-lease with Air Mekong |  | $ 5,100,000 us-gaap_GainLossOnContractTermination / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skyw_MekongAviationJointStockCompanyMember |  |  |

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- Definition Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594 + Details
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- Definition This item represents the gain (loss) realized during the period from the sale of investments accounted for under the cost method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph c -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 + Details
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- Definition Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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- Definition The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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