Collateral for Letters of Credit - Additional Information (Detail) (USD $)	Mar. 31, 2015 LetterOfCredit
Guarantees [Abstract]
Number of outstanding letters of credit	2asbi_NumberOfOutstandingLettersOfCredit
Outstanding letters of credit from the Federal Home Loan Bank of Indianapolis	$ 5,014,000

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant