Loans and Allowance for Loan and Lease Losses - Allowance for Loan Losses and Recorded Investment in Loans (Parenthetical) (Detail)	3 Months Ended
Mar. 31, 2015
Receivables [Abstract]
Time limit for charging off unsecured loan	120 days

Limited period for charging off unsecured loan to principal or interest.

No definition available.

Name:	asbi_LimitedPeriodForChargingOffUnsecuredLoanToPrincipalOrInterest
Namespace Prefix:	asbi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration