FAIR VALUE MEASURES (Details) - Mortgage Loans Held for Sale [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Assets And Liabilities Carrying Value And Fair Value [Line Items]
Aggregate fair value of mortgage loans held for sale	$ 126,263	$ 111,182	$ 111,807
Aggregate unpaid principal balance	121,308	107,652	108,179
Past-due loans of 90 days or more	0	0	0
Nonaccrual loans	$ 0	$ 0	$ 0

Aggregate fair value of loans held for sale.

No definition available.

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

- Definition

Aggregate Unpaid Principal Balance Of Items For Which Fair Value Option Was Elected

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

Name:	abcb_AssetsAndLiabilitiesCarryingValueAndFairValueLineItems
Namespace Prefix:	abcb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

For loans held as assets for which the fair value option has been elected, this item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of those loans that are 90 days or more past due.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (e)(3)
-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612

+ Details

Name:	us-gaap_FairValueOptionLoansHeldAsAssets90DaysOrMorePastDueAggregateDifference
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

+ References

+ Details

Name:	us-gaap_FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatusAggregatedDifference
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis=abcb_MortgageLoansHeldForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: