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Legal Matters (Details) (SkyWest Airlines and ExpressJet v. Delta, USD $) In Millions, unless otherwise specified | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2007 | Dec. 31, 2010 | Jun. 30, 2014
SkyWest Airlines and ExpressJet v. Delta |  |  |
Legal Matters |  |  |
Amount of receivables withheld from weekly scheduled wire payments to SkyWest Airlines and Atlantic Southeast | $ 25 |  |
Withheld receivables recognized as revenue by the entity |  |  | 31.7
Amount that the settlement offered by the reporting entity was less than the cumulative amount of withheld receivables recognized as revenue by the reporting entity |  | 5.9 |
Receivables written off by the entity |  | $ 5.9 |

X
- Definition Represents the cumulative amount of withheld receivables recognized as revenue by the entity. + References No definition available. + Details
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Namespace Prefix: | skyw_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of receivables withheld by the other entity in pursuant with discrepancy in providing services under the agreements. + References No definition available. + Details
Name: | skyw_LossContingenciesReimbursedExpensesWithheld
Namespace Prefix: | skyw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount that the settlement offered by the reporting entity was less than the cumulative amount of withheld receivables recognized as revenue by the reporting entity. + References No definition available. + Details
Name: | skyw_LossContingencySettlementAmountOfferedLessThanCumulativeWithheldReimbursedExpensesRecognizedAsRevenue
Namespace Prefix: | skyw_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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