Convertible note hedge fair value

No definition available.

Name:	atsg_Convertiblenotehedgefairvalue
Namespace Prefix:	atsg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Convertible note hedge shares

+ References

No definition available.

+ Details

Name:	atsg_Convertiblenotehedgeshares
Namespace Prefix:	atsg_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

gain/loss convertible debt hedge asset and note obligation valuation

+ References

No definition available.

+ Details

Name:	atsg_Gainlossconvertibledebthedgeassetandnoteobligationvaluation
Namespace Prefix:	atsg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959

+ Details

Name:	us-gaap_DerivativeLiabilityNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

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

- Definition

Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959

+ Details

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

- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

+ Details

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

- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

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

- Details

Name:	atsg_DerivativeByExpirationDateAxis=atsg_May302021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_SwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	atsg_DerivativeByExpirationDateAxis=atsg_May52021MemberMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	atsg_DerivativeByExpirationDateAxis=atsg_March312022OneMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	atsg_DerivativeByExpirationDateAxis=atsg_March312022TwoMemberMemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtConversionByUniqueDescriptionAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Derivative Instruments (Details) - USD ($) shares in Thousands, number in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	May 10, 2018	Dec. 31, 2017	Sep. 25, 2017
Derivative [Line Items]
Pre-tax (charge) on derivative instruments	$ 17,895	$ (34,433)	$ 28,707	$ (100,213)
Net (gain) loss on financial instruments			(3,714)	$ 154
Convertible note hedge fair value	$ 0		0			$ 53,683
gain/loss convertible debt hedge asset and note obligation valuation			$ (100)
May 30, 2021 [Member] \| Swap [Member]
Derivative [Line Items]
Stated Interest Rate	0.00%		0.00%
Market Value (Liability)	$ (606)		$ (606)			(240)
Derivative Liability, Notional Amount	$ 30,000		$ 30,000			35,625
May 5, 2021 [Member] [Member] [Member] \| Swap [Member]
Derivative [Line Items]
Stated Interest Rate	0.00%		0.00%
Market Value (Liability)	$ (929)		$ (929)			(719)
Derivative Liability, Notional Amount	$ 30,000		$ 30,000			35,625
March 31, 2022 One [Member] [Member] \| Swap [Member]
Derivative [Line Items]
Stated Interest Rate	0.00%		0.00%
Market Value (Liability)	$ (1,657)		$ (1,657)			(416)
Derivative Liability, Notional Amount	$ 50,000		$ 50,000			50,000
March 31, 2022 Two [Member] [Member] [Member] \| Swap [Member]
Derivative [Line Items]
Stated Interest Rate	0.00%		0.00%
Market Value (Liability)	$ (2,363)		$ (2,363)			(465)
Derivative Liability, Notional Amount	$ 75,000		$ 75,000			75,000
Convertible Debt [Member]
Derivative [Line Items]
Convertible note hedge shares							8,111
Fair Value, Measurements, Recurring [Member]
Derivative [Line Items]
Convertible note hedge fair value						53,683
Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Derivative [Line Items]
Convertible note hedge fair value					$ 50,559	$ 53,683