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Period when the finance lease is scheduled to expiry.

No definition available.

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The number of finance lease facility in operations.

No definition available.

Name:	asc_NumberOfFinanceLeaseFacility
Namespace Prefix:	asc_
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Refers to the number of long term lease agreements.

No definition available.

Name:	asc_NumberOfLongtermLeaseAgreements
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Data Type:	xbrli:integerItemType
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Refers to the number of short term lease agreements.

No definition available.

Name:	asc_NumberOfShortTermLeaseAgreements
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Represents number of subsidiaries.

No definition available.

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The number of vessels in operations.

No definition available.

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The incremental borrowing rate (IBR) is the interest rate a lessee would have to pay to borrow funds to finance an asset similar to the lease's ROU asset in value, over a similar term and in a similar economic environment.

No definition available.

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Data Type:	dtr-types:percentItemType
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Refers to transaction costs related to the sale leaseback.

No definition available.

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It represents the amount of seller's credit .

No definition available.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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Description of reference rate used for variable rate of debt instrument.

No definition available.

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Indicates (true false) whether practical expedients are elected for not reassessing whether any expired or existing contract is or contains lease, lease classification for expired or existing lease, and initial direct cost for any existing lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 10
-Section 65
-Paragraph 1
-Subparagraph (j)
-URI http://asc.fasb.org/extlink&oid=123341672&loc=SL77916155-209984

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 65
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-URI http://asc.fasb.org/extlink&oid=123341672&loc=SL77916155-209984

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Data Type:	xbrli:booleanItemType
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Period Type:	duration

Term of lessee's finance 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980

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Data Type:	xbrli:durationItemType
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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.

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

The historical cost of the asset(s) sold in connection with the sale of the property to another party and the lease of the property back to the seller.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 55
-Paragraph 51
-URI http://asc.fasb.org/extlink&oid=123386837&loc=d3e51840-112757

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=123417830&loc=SL77919786-209982

Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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-Name Accounting Standards Codification
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-SubTopic 40
-Section 55
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-URI http://asc.fasb.org/extlink&oid=123386837&loc=d3e51843-112757

Name:	us-gaap_SaleLeasebackTransactionHistoricalCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix:
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Name:	us-gaap_LongtermDebtTypeAxis=asc_FinanceLiabilityMember
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Data Type:	na
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Name:	srt_ConsolidatedEntitiesAxis=asc_JapaneseLeaseThreeMember
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Data Type:	na
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Name:	srt_ConsolidatedEntitiesAxis=asc_JapaneseLeaseFourMember
Namespace Prefix:
Data Type:	na
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Data Type:	na
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