Represents number of Aircraft agreed to lease

No definition available.

Name:	skyw_NumberOfAircraftAgreedToLease
Namespace Prefix:	skyw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the information pertaining to the number of aircrafts that are executed an early lease buyout.

+ References

No definition available.

+ Details

Name:	skyw_NumberOfAircraftInWhichEntityExecutedEarlyLeaseBuyout
Namespace Prefix:	skyw_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount loaned to facilitate payment of the purchase price for the Stock Sale.

+ References

No definition available.

+ Details

Name:	skyw_SaleOfStockLoanOfferedOrLendOnTransaction
Namespace Prefix:	skyw_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888428&loc=SL77919359-209981

+ Details

Name:	us-gaap_LessorOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for acquisition of long-lived depreciable flight assets, including owned aircraft or capital improvements.

+ References

No definition available.

+ Details

Name:	us-gaap_PaymentsForFlightEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Cash received from sales of long-lived depreciable flight assets, including owned aircraft or capital improvements.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromSaleOfFlightEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedOnTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

Name:	us-gaap_TypeOfArrangementAxis=skyw_EarlyLeaseBuyoutAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=skyw_ExpressJetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=skyw_AssetPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=skyw_StockPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_AircraftTypeAxis=srt_CRJ700Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_AircraftTypeAxis=srt_CRJ200Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details) $ in Thousands				12 Months Ended
Subsequent Events (Details) $ in Thousands	Feb. 20, 2019 USD ($) aircraft	Jan. 22, 2019 USD ($) aircraft	Jan. 11, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Feb. 28, 2019 USD ($)
Subsequent Event [Line Items]
Cash payment				$ 1,062,380	$ 661,176	$ 1,138,963
Authorized repurchase amount							$ 250,000
Subsequent event \| Early Lease Buyout Agreement
Subsequent Event [Line Items]
Cash payment	$ 111,700
Subsequent event \| ExpressJet \| Asset Purchase Agreement
Subsequent Event [Line Items]
Proceeds from sale of equipment			$ 60,000
Subsequent event \| ExpressJet \| Stock Purchase Agreement
Subsequent Event [Line Items]
Cash received from stock sale		$ 16,000
Amount loaned to Kair Enterprises, Inc		$ 26,000
Lease term (in years)		5 years
CRJ 700 \| Subsequent event \| Early Lease Buyout Agreement
Subsequent Event [Line Items]
Number of aircraft in early lease buyout \| aircraft	16
CRJ 200 \| Subsequent event \| Early Lease Buyout Agreement
Subsequent Event [Line Items]
Number of aircraft in early lease buyout \| aircraft	36
CRJ 200 \| Subsequent event \| ExpressJet \| Stock Purchase Agreement
Subsequent Event [Line Items]
Number of aircraft agreed to lease \| aircraft		16