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Debt - Additional information (Details) $ in Millions					6 Months Ended
	Jun. 25, 2021 item	Dec. 17, 2020 USD ($) subsidiary	Jul. 17, 2020	Dec. 11, 2019 USD ($) subsidiary	Jun. 30, 2022 item facility	Jun. 30, 2022 item	Jun. 30, 2022 USD ($)	Jun. 30, 2022	Oct. 24, 2017 USD ($)
Number of loan facilities					5	6
Number of vessels with loans | item					11
Required minimum cash and cash equivalents							$ 16.8
Minimum Net Worth Required							$ 150.0
Minimum [Member]
Required Minimum Solvency Covenant					30.00%
Cash and Cash Equivalent Percentage								5.00%
Fair market Value Percentage					130.00%
Nordea SEB Joint Bank Facility
Number of vessels with loans | item	2
Number of subsidiaries | subsidiary				8
Line of Credit Facility, Maximum Borrowing Capacity				$ 100.0
Debt Instrument, Basis Spread on Variable Rate				2.40%
Debt Instrument, Description of Variable Rate Basis				LIBOR plus 2.4%
Debt Instrument Maturity Period				December 2024
Nordea SEB Revolving Facility
Line of Credit Facility, Maximum Borrowing Capacity				$ 40.0
Number of days to provide notice for draw down or repayment of debt				5 days
Cash and Cash Equivalent Percentage								60.00%
ABN CACIB Joint Bank Facility
Number of subsidiaries | subsidiary				4
Line of Credit Facility, Maximum Borrowing Capacity				$ 61.5
Debt Instrument, Basis Spread on Variable Rate				2.40%
Debt Instrument Maturity Period				December 2024
ABN AMRO Revolving Facility
Line of Credit Facility, Maximum Borrowing Capacity									$ 15.0
Debt Instrument, Basis Spread on Variable Rate			3.90%
IYO Bank Facility
Number of subsidiaries | subsidiary		1
Line of Credit Facility, Maximum Borrowing Capacity		$ 10.0
Debt Instrument, Basis Spread on Variable Rate		2.25%
Debt Instrument Maturity Period		December 2025

X

- Definition

Percentage of cash and cash equivalents required to be maintained.

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
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Balance Type:	na
Period Type:	instant

X

- Definition

Period when the debt instrument is scheduled to be fully repaid.

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of fair market value.

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The minimum net worth required under the debt covenant as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Number of days within which the company has to provide notice for drawing down or repayment of debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of finance lease facility in operations.

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents number of subsidiaries.

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of vessels employed by the company

+ References

No definition available.

+ Details

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Namespace Prefix:	asc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The minimum cash balance required under the debt covenants as of the balance sheet date.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

The minimum solvency required under the debt covenants as of the balance sheet date.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ 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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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