XML 63 R42.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Nature of Operations and Summary of Significant Accounting Policies - Flying Agreements (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) aircraft | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) aircraft | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Agreements with other airlines |  |  |  |  |  |  |  |  |  |  |
Percentage of ASMs flown under fixed-fee arrangements |  |  |  |  |  |  |  |  | 82.00% |  |
Percentage of ASMs flown under pro-rate arrangements |  |  |  |  |  |  |  |  | 18.00% |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ | $ 743,591 | $ 760,295 | $ 744,383 | $ 723,694 | $ 783,400 | $ 805,515 | $ 829,275 | $ 803,489 | $ 2,971,963 | $ 3,221,679 | $ 3,122,592
Rental income under operating leases |  |  |  |  |  |  |  |  |  |  |
Operating lease income relating to lease payments | $ |  |  |  |  |  |  |  |  | 27,552 |  |
Operating lease income relating to lease payments | $ |  |  |  |  |  |  |  |  |  | 3,923 | 3,293
Operating lease income relating to variable lease payments | $ |  |  |  |  |  |  |  |  | 9,608 |  |
Total operating revenues | $ |  |  |  |  |  |  |  |  | 2,971,963 | 3,221,679 | 3,122,592
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
2020 | $ | 32,724 |  |  |  |  |  |  |  | 32,724 |  |
2021 | $ | 31,344 |  |  |  |  |  |  |  | 31,344 |  |
2022 | $ | 24,786 |  |  |  |  |  |  |  | 24,786 |  |
2023 | $ | 18,530 |  |  |  |  |  |  |  | 18,530 |  |
2024 | $ | 18,222 |  |  |  |  |  |  |  | 18,222 |  |
Thereafter | $ | 54,932 |  |  |  |  |  |  |  | 54,932 |  |
Total | $ | 180,538 |  |  |  |  |  |  |  | 180,538 |  |
Property and equipment and related assets | $ | 5,394,681 |  |  |  | 5,005,744 |  |  |  | 5,394,681 | 5,005,744 |
Accounts receivable | $ | 83,000 |  |  |  | 64,200 |  |  |  | $ 83,000 | 64,200 |
Alaska Capacity Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 32 |  |
Sky West Airlines Inc | Delta Connection Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Agreement term |  |  |  |  |  |  |  |  | 4 years 1 month 6 days |  |
Sky West Airlines Inc | Delta Connection Prorate Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Notice period for termination of agreement |  |  |  |  |  |  |  |  | 30 days |  |
Sky West Airlines Inc | United Express Agreements |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Agreement term |  |  |  |  |  |  |  |  | 4 years 3 months 18 days |  |
Sky West Airlines Inc | United Express Prorate Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Notice period for termination of agreement |  |  |  |  |  |  |  |  | 120 days |  |
Sky West Airlines Inc | American Prorate Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Notice period for termination of agreement |  |  |  |  |  |  |  |  | 120 days |  |
Third Party Lease |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Property and equipment and related assets | $ | $ 97,000 |  |  |  |  |  |  |  | $ 97,000 |  |
CRJ 200 |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of seats on aircraft |  |  |  |  |  |  |  |  | 50 |  |
CRJ 200 | American Prorate Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 7 |  |
CRJ 200 | Sky West Airlines Inc | Delta Connection Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 55 |  |
CRJ 200 | Sky West Airlines Inc | Delta Connection Prorate Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 29 |  |
CRJ 200 | Sky West Airlines Inc | United Express Agreements |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 68 |  |
CRJ 200 | Sky West Airlines Inc | United Express Prorate Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 31 |  |
CRJ 700 | Minimum |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of seats on aircraft |  |  |  |  |  |  |  |  | 65 |  |
CRJ 700 | Maximum |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of seats on aircraft |  |  |  |  |  |  |  |  | 76 |  |
CRJ 700 | American Capacity Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 62 |  |
Agreement term |  |  |  |  |  |  |  |  | 4 years 1 month 6 days |  |
CRJ 700 | Sky West Airlines Inc | Delta Connection Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 13 |  |
CRJ 700 | Sky West Airlines Inc | United Express Agreements |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 19 |  |
CRJ 700 | American |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 10 |  |
Number of aircrafts to be placed in service | 2 |  |  |  |  |  |  |  | 2 |  |
CRJ 900 | Minimum |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of seats on aircraft |  |  |  |  |  |  |  |  | 65 |  |
CRJ 900 | Maximum |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of seats on aircraft |  |  |  |  |  |  |  |  | 76 |  |
CRJ 900 | Sky West Airlines Inc | Delta Connection Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 43 |  |
CRJ 900 | Delta |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 1 |  |
Agreement term |  |  |  |  |  |  |  |  | 9 years |  |
E175 | Minimum |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of seats on aircraft |  |  |  |  |  |  |  |  | 65 |  |
E175 | Maximum |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of seats on aircraft |  |  |  |  |  |  |  |  | 76 |  |
E175 | Alaska Capacity Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Agreement term |  |  |  |  |  |  |  |  | 9 years 2 months 12 days |  |
E175 | Sky West Airlines Inc | Delta Connection Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 59 |  |
Number of additional aircraft placed into service |  |  |  |  |  |  |  |  | 6 |  |
E175 | Sky West Airlines Inc | United Express Agreements |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of aircraft |  |  |  |  |  |  |  |  | 65 |  |
E175 | Sky West Airlines Inc | American Capacity Purchase Agreement |  |  |  |  |  |  |  |  |  |  |
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Number of additional aircraft placed into service |  |  |  |  |  |  |  |  | 20 |  |
Flying agreements |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ |  |  |  |  |  |  |  |  | $ 2,889,265 | 3,169,520 | 3,078,297
Rental income under operating leases |  |  |  |  |  |  |  |  |  |  |
Total operating revenues | $ |  |  |  |  |  |  |  |  | 2,889,265 | 3,169,520 | 3,078,297
future minimum rental income |  |  |  |  |  |  |  |  |  |  |
Accounts receivable | $ | $ 58,800 |  |  |  | $ 52,700 |  |  |  | 58,800 | 52,700 |
Flight operations |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ |  |  |  |  |  |  |  |  | 1,538,062 | 1,856,253 | 1,805,510
Aircraft lease |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ |  |  |  |  |  |  |  |  | 830,247 | 814,518 | 834,366
Prorate agreements |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ |  |  |  |  |  |  |  |  | 520,956 | 498,749 | 438,421
Airport customer service revenue |  |  |  |  |  |  |  |  |  |  |
Revenues [Abstract] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ |  |  |  |  |  |  |  |  | 45,538 | 48,236 | 41,002
Airport customer service and other |  |  |  |  |  |  |  |  |  |  |
Rental income under operating leases |  |  |  |  |  |  |  |  |  |  |
Total operating revenues | $ |  |  |  |  |  |  |  |  | $ 82,698 | $ 52,159 | $ 44,295

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: | skyw_AgreementsWithOtherAirlinesLineItems
Namespace Prefix: | skyw_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period of notice for termination of agreement. + References No definition available. + Details
Name: | skyw_NoticePeriodForTerminationOfAgreement
Namespace Prefix: | skyw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of additional aircrafts into service as per agreement. + References No definition available. + Details
Name: | skyw_NumberOfAdditionalAircraftsIntoService
Namespace Prefix: | skyw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of aircraft seats. + References No definition available. + Details
Name: | skyw_NumberOfAircraftSeats
Namespace Prefix: | skyw_
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of aircrafts anticipated to place in service. + References No definition available. + Details
Name: | skyw_NumberOfAircraftsAnticipatedToPlaceInService
Namespace Prefix: | skyw_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of available seat miles ("ASMs") flown under fixed-fee arrangements. + References No definition available. + Details
Name: | skyw_PercentageOfAvailableSeatMilesFlownUnderFixedFeeArrangements
Namespace Prefix: | skyw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of available seat miles ("ASMs") flown under pro-rate arrangements. + References No definition available. + Details
Name: | skyw_PercentageOfAvailableSeatMilesFlownUnderProRateArrangements
Namespace Prefix: | skyw_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period of agreement entered into by the entity. + References No definition available. + Details
Name: | skyw_TermsOfAgreement
Namespace Prefix: | skyw_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of lease payments to be received by lessor for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
Name: | us-gaap_LessorOperatingLeasePaymentsToBeReceived
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lease payments to be received by lessor in fifth fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
Name: | us-gaap_LessorOperatingLeasePaymentsToBeReceivedFiveYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lease payments to be received by lessor in fourth year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
Name: | us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lease payments to be received by lessor in next fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
Name: | us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lease payments to be received by lessor after fifth fiscal year following latest statement of financial position date for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
Name: | us-gaap_LessorOperatingLeasePaymentsToBeReceivedThereafter
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lease payments to be received by lessor in third fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
Name: | us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of lease payments to be received by lessor in second fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
Name: | us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of aircraft operated by the carrier. + References No definition available. + Details
Name: | us-gaap_NumberOfAircraftOperated
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating lease income from lease payments paid and payable to lessor. Excludes variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=118952077&loc=SL77927221-108306 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919372-209981 + Details
Name: | us-gaap_OperatingLeaseLeaseIncomeLeasePayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of operating lease income from variable lease payments paid and payable to lessor, excluding amount included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=118952077&loc=SL77927221-108306 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919372-209981 + Details
Name: | us-gaap_OperatingLeaseVariableLeaseIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
Name: | us-gaap_OperatingLeasesIncomeStatementLeaseRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: 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(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 4: 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(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 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(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-06(3)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604059-122996 Reference 4: 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(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_ReceivablesNetCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=skyw_AlaskaCapacityPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=skyw_SkyWestAirlinesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=skyw_DeltaConnectionAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=skyw_DeltaConnectionProrateAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=skyw_UnitedExpressAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=skyw_UnitedExpressProrateAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=skyw_AmericanCapacityProrateAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_AssetsLeasedToOthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_AircraftTypeAxis=srt_CRJ200Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_AircraftTypeAxis=srt_CRJ700Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=skyw_AmericanCapacityPurchaseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=skyw_AmericanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_AircraftTypeAxis=srt_CRJ900Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=skyw_DeltaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_AircraftTypeAxis=skyw_E175Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=skyw_FlyingAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=skyw_AircraftOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=skyw_AircraftLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=skyw_ProrateAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=skyw_AirportCustomerServiceRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=skyw_AirportCustomerServiceAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |