No definition available.

Name:	atsg_LesseeNumberOfLeasedAircraft
Namespace Prefix:	atsg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents number of aircraft to be purchased.

No definition available.

Name:	atsg_NumberOfAircraftToBePurchased
Namespace Prefix:	atsg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents number of owned aircrafts.

No definition available.

Name:	atsg_NumberOfOwnedAircrafts
Namespace Prefix:	atsg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

the number of slots for aircraft modifications.

No definition available.

Name:	atsg_NumberOfSlotsForAircraftModifications
Namespace Prefix:	atsg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
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Name:	us-gaap_ContractualObligation
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of contractual obligation to be paid in remainder of current fiscal year.

No definition available.

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

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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
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Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_OperatingLeasePayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Weighted average discount rate for operating lease calculated at point in time.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
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Name:	us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Name:	us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
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Name:	us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Name:	srt_AircraftTypeAxis=srt_B767300Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_AircraftTypeAxis=atsg_A321200Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_AircraftTypeAxis=srt_A330Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_AircraftTypeAxis=atsg_A330300Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LeaseContractualTermAxis=atsg_PropertyLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_LeaseContractualTermAxis=atsg_EquipmentLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=atsg_AircraftProvidedByCustomersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Air Transport Services Group, Inc. 10-Q