Name:	abcb_LoansAcquiredInTransferAccretableYield
Namespace Prefix:	abcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Loans acquired in transfer acquired contractually required payments receivable at acquisition.

No definition available.

Name:	abcb_LoansAcquiredInTransferAcquiredContractuallyRequiredPaymentsReceivableAtAcquisition
Namespace Prefix:	abcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Loans acquired in transfer acquired contractually required payments receivable at acquisition fair value.

No definition available.

Name:	abcb_LoansAcquiredInTransferAcquiredContractuallyRequiredPaymentsReceivableAtAcquisitionFairvalue
Namespace Prefix:	abcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Loans acquired in transfer acquired contractually required payments receivable at acquisition present value.

No definition available.

Name:	abcb_LoansAcquiredInTransferAcquiredContractuallyRequiredPaymentsReceivableAtAcquisitionPresentValue
Namespace Prefix:	abcb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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

The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

No definition available.