XML 63 R50.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Commitments and Contingencies - Concentration Risks and Employees Under Collective Bargaining Agreements (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2018 | Dec. 31, 2017 USD ($) employee | Dec. 31, 2016 USD ($) | Dec. 31, 2015
Concentration Risk and Significant Customers |  |  |  |
Allowance for doubtful accounts | $ |  | $ 157,000 | $ 173,000 |
ExpressJet Delaware Mechanics | Subsequent event |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Labor agreement, contract extension term (in years) | 1 year |  |  |
Revenue from rights, concentration risk | Customer concentration risk | Delta, United, and Continental Combined |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Concentration risk (as a percent) |  | 78.80% | 85.40% | 86.90%
Full-time equivalent number of employees |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 16,300 |  |
Full-time equivalent number of employees | Unionized employees |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Concentration risk (as a percent) |  | 22.00% |  |
Full-time equivalent number of employees | Unionized employees | Atlantic Southeast Pilots |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 669 |  |
Full-time equivalent number of employees | Unionized employees | Atlantic Southeast Flight Attendants |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 552 |  |
Full-time equivalent number of employees | Unionized employees | Atlantic Southeast Flight Controllers |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 25 |  |
Full-time equivalent number of employees | Unionized employees | Atlantic Southeast Mechanics |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 102 |  |
Full-time equivalent number of employees | Unionized employees | Atlantic Southeast Stock Clerks |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 29 |  |
Full-time equivalent number of employees | Unionized employees | ExpressJet Delaware Pilots |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 1,111 |  |
Full-time equivalent number of employees | Unionized employees | ExpressJet Delaware Flight Attendants |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 618 |  |
Full-time equivalent number of employees | Unionized employees | ExpressJet Delaware Mechanics |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 418 |  |
Full-time equivalent number of employees | Unionized employees | ExpressJet Delaware Dispatchers |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 22 |  |
Full-time equivalent number of employees | Unionized employees | ExpressJet Delaware Stock Clerks |  |  |  |
Concentration Risk and Significant Customers |  |  |  |
Number of employees |  | 42 |  |

X
- Definition Number of persons employed by the Entity + References No definition available. + Details
Name: | dei_EntityNumberOfEmployees
Namespace Prefix: | dei_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Period of the labor agreement contract extension term in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | skyw_LaborAgreementTermOfContractExtension
Namespace Prefix: | skyw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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. + References No definition available. + Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_ExpressJetDelawareMechanicsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_RevenueFromRightsConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorCustomersAxis=skyw_DeltaUnitedContinentalCombinedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_NumberOfEmployeesTotalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_UnionizedEmployeesConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_AtlanticSoutheastPilotsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_AtlanticSoutheastFlightAttendantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_AtlanticSoutheastFlightControllersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_AtlanticSoutheastMechanicsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_AtlanticSoutheastStockClerksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_ExpressJetDelawarePilotsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_ExpressJetDelawareFlightAttendantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_ExpressJetDelawareDispatchersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | skyw_EmployeeGroupAxis=skyw_ExpressJetDelawareStockClerksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |