Carrying value as of the balance sheet date of obligations related to profit interests distribution.

No definition available.

Name:	asc_ProfitInterestsDistributionLiability
Namespace Prefix:	asc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The percentage rate used to calculate dividend payments on temporary equity.

+ References

No definition available.

+ Details

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

- Definition

The percent of profit interests on distributions for temporary equity.

+ References

No definition available.

+ Details

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

- Definition

Percentage of price to be paid upon redemption on temporary equity.

+ References

No definition available.

+ Details

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

- Definition

Number of new stock classified as temporary equity issued during the period.

+ References

No definition available.

+ Details

Name:	asc_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	asc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the aggregate cost of investments accounted for under the equity method of accounting.

+ 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 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_TemporaryEquityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The per share liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ References

No definition available.

+ Details

Name:	us-gaap_TemporaryEquityLiquidationPreferencePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=asc_Element1CorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	asc_AnniversaryAxis=asc_ThirdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	asc_AnniversaryAxis=asc_FourthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	asc_AnniversaryAxis=asc_FifthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions			6 Months Ended
	Dec. 03, 2021	Jun. 17, 2017	Jun. 30, 2022	Jun. 17, 2021
Element 1 Corp.
Preferred Stock
Profit interests on distributions			20.00%
Total investment		$ 9.3	$ 9.3
Cumulative Series A redeemable Preferred Stock
Preferred Stock
Preferred stock issued	15,000	25,000
Liquidation preference per share	$ 1,000.00	$ 1,000.00		$ 1,000.00
Divided rate			8.50%
Cumulative Series A redeemable Preferred Stock \| Other noncurrent liabilities
Preferred Stock
Profit interests distribution liability			$ 0.9
Cumulative Series A redeemable Preferred Stock \| Third anniversary
Preferred Stock
Redemption price (as a percent)			103.00%
Cumulative Series A redeemable Preferred Stock \| Fourth anniversary
Preferred Stock
Redemption price (as a percent)			102.00%
Cumulative Series A redeemable Preferred Stock \| Fifth anniversary
Preferred Stock
Redemption price (as a percent)			100.00%