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v3.25.0.1

Debt - Interest rates (Details) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Effective interest rate, excluding commitment fees | 7.54% | 7.83% | 4.38%
Effective interest rate, weighted average | 7.54% | 5.80% | 1.61%
Minimum [Member] |  |  |
Interest rates (SOFR) | 4.69% | 4.50% | 0.10%
Maximum [Member] |  |  |
Interest rates (SOFR) | 5.37% | 5.36% | 4.50%

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- Definition Effective interest rate, excluding commitment fees for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References No definition available. + Details
Name: | asc_EffectiveInterestRateExcludingCommitmentFees
Namespace Prefix: | asc_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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

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