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Risk Management (Details)	12 Months Ended
	Dec. 31, 2013 Bank Charterer Vessel
Concentration Risk [Line Items]
Number of vessels in operation	8
Assets [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Number of banks deposits held	2
Potential number of charterers employing all vessels	1
Number of vessels in operation	8
Number of charterers employment	5

X

- Definition

The number of banks deposits are held.

+ References

No definition available.

+ Details

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

X

- Definition

The number of charterers employing vessels as of the balance sheet date.

+ References

No definition available.

+ Details

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

X

- Definition

The number of vessels in operations.

+ References

No definition available.

+ Details

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

X

- Definition

The potential number of charterers employing all vessels at any given point in time during the period.

+ References

No definition available.

+ Details

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

X

- Details

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