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Consolidated Statements of Earnings (unaudited) (Parenthetical)	Jan. 20, 2021
Income Statement [Abstract]
Common stock exchange ratio	0.90686

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- Definition

Common stock exchange ratio.

+ References

No definition available.

+ Details

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Namespace Prefix:	afbi_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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