Gain on Sale of ExpressJet (Details) - USD ($) $ in Thousands			6 Months Ended
Jan. 22, 2019	Jan. 11, 2019	Jun. 30, 2019
Gain on sale	$ 46,500		$ 46,525
Asset Purchase Agreement \| ExpressJet
Proceeds from sale of equipment		$ 60,800
Stock Purchase Agreement \| ExpressJet
Cash received from stock sale	18,800
Amount loaned to Kair Enterprises, Inc	$ 26,000
Interest rate (as a percent)	6.85%

The amount of gain loss on sale or disposal of subsidiaries.

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount loaned to facilitate payment of the purchase price for sale of stock.

+ References

No definition available.

+ Details

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Namespace Prefix:	skyw_
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Balance Type:	credit
Period Type:	instant

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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