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Nature of Operations and Summary of Significant Accounting Policies (Details 4) (USD $) | 12 Months Ended | 0 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 07, 2005
Impairment of Long Lived and Intangible Assets |  |  |  |
Property and equipment and related assets | $ 3,021,188,000 us-gaap_PropertyPlantAndEquipmentNet | $ 2,651,793,000 us-gaap_PropertyPlantAndEquipmentNet |  |
Intangible assets | 12,748,000 us-gaap_IntangibleAssetsNetExcludingGoodwill | 14,998,000 us-gaap_IntangibleAssetsNetExcludingGoodwill | 17,248,000 us-gaap_IntangibleAssetsNetExcludingGoodwill |
Capitalized Interest |  |  |  |
Capitalized interest costs | 1,800,000 us-gaap_InterestCostsIncurredCapitalized | 1,200,000 us-gaap_InterestCostsIncurredCapitalized | 0 us-gaap_InterestCostsIncurredCapitalized |
Atlantic Southeast Airlines Inc |  |  |  |
Impairment of Long Lived and Intangible Assets |  |  |  |
Intangible assets related to acquisition of Atlantic Southeast |  |  |  | 33,700,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = skyw_AtlanticSoutheastAirlinesIncMember
Period for amortization of intangible assets |  |  |  | 15 years
Accumulated amortization expense | $ 21,000,000 skyw_AccumulatedAmortizationExpense / us-gaap_BusinessAcquisitionAxis = skyw_AtlanticSoutheastAirlinesIncMember | $ 18,700,000 skyw_AccumulatedAmortizationExpense / us-gaap_BusinessAcquisitionAxis = skyw_AtlanticSoutheastAirlinesIncMember |  |

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