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COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Billions | Mar. 31, 2025 USD ($)
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Federal Home Loan Bank | Letter of Credit |
Loss Contingencies [Line Items] |
Letter of credit | $ 1.3

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- Definition This element represents the amount of letter of credit issued by a financial institution which acts as a guarantee of payment to a beneficiary, or as the source of payment for a specific transaction. + References No definition available. + Details
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Namespace Prefix: | abcb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |