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Basis of Presentation - Additional Information (Detail)	Jun. 30, 2015 Subsidiary
Regulatory Assets [Abstract]
Wholly-owned subsidiaries	2

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- Definition

Regulatory Assets [Abstract]

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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- Definition

Wholly owned subsidiaries.

+ References

No definition available.

+ Details

Name:	asbi_WhollyOwnedSubsidiaries
Namespace Prefix:	asbi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant