$ABCB
Ameris Bancorp Stock $abcb

$abcb Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000035156921000004 Filed on February 26, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$178.8M	$194.1M	$188.4M
YoY Change	-7.88%	58.11%	55.52%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.200M	$9.700M	$9.500M
YoY Change	-15.46%	56.45%	69.64%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$15.33M	$38.73M	$39.59M
YoY Change	-60.42%	66.95%	79.3%
% of Operating Profit
Other Income/Expense, Net			$92.05M
YoY Change			447.19%
Pretax Income	$126.0M	$82.21M	$27.08M
YoY Change	53.26%	62.62%	-50.56%
Income Tax	$31.71M	$20.96M	$5.692M
% Of Pretax Income	25.17%	25.5%	21.02%
Net Earnings	$94.29M	$61.25M	$21.38M
YoY Change	53.94%	40.68%	-48.4%
Net Earnings / Revenue	52.74%	31.56%	11.35%
Basic Earnings Per Share	$1.36	$0.88	$0.31
Diluted Earnings Per Share	$1.36	$0.88	$0.31
COMMON SHARES
Basic Shares Outstanding	69.49M shares	69.66M shares	69.37M shares
Diluted Shares Outstanding			69.60M shares

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$2.117B	$621.8M	$479.7M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$222.9M	$233.1M	$239.4M
YoY Change	-4.38%	60.31%	64.12%
Goodwill	$928.0M	$931.6M	$911.5M
YoY Change	-0.39%	85.06%	80.28%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$33.00M	$2.000M	$22.00M
YoY Change	1550.0%	-94.29%	-42.11%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$20.44B	$18.24B	$17.76B
YoY Change	12.04%	59.41%	55.43%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses		$42.00M	$42.00M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$12.00M	$21.00M	$18.00M
YoY Change	-42.86%	5.0%	28.57%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$12.00M	$42.00M	$42.00M
YoY Change	-71.43%	110.0%	200.0%
LONG-TERM LIABILITIES
Long-Term Debt	$501.0M	$397.0M	$349.0M
YoY Change	26.2%	68.94%	112.8%
Other Long-Term Liabilities	$273.0M	$157.0M	$146.0M
YoY Change	73.89%	103.9%	75.9%
Total Long-Term Liabilities	$774.0M	$554.0M	$495.0M
YoY Change	39.71%	77.56%	100.4%
TOTAL LIABILITIES
Total Short-Term Liabilities	$12.00M	$42.00M	$42.00M
Total Long-Term Liabilities	$774.0M	$554.0M	$495.0M
Total Liabilities	$17.79B	$15.77B	$15.34B
YoY Change	12.8%	57.93%	53.07%
SHAREHOLDERS EQUITY
Retained Earnings	$671.5M	$508.0M	$457.1M
YoY Change	32.2%	34.69%	35.1%
Common Stock	$1.985B	$1.979B	$1.976B
YoY Change	0.33%	79.78%	79.7%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$42.97M	$34.97M	$28.12M
YoY Change	22.86%	111.16%	69.81%
Treasury Stock Shares	2.212M shares	1.996M shares	1.838M shares
Shareholders Equity	$2.647B	$2.470B	$2.421B
YoY Change
Total Liabilities & Shareholders Equity	$20.44B	$18.24B	$17.76B
YoY Change	12.04%	59.41%	55.43%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	$94.29M	$61.25M	$21.38M
YoY Change	53.94%	40.68%	-48.4%
Depreciation, Depletion And Amortization	$8.200M	$9.700M	$9.500M
YoY Change	-15.46%	56.45%	69.64%
Cash From Operating Activities	$419.0M	-$352.9M	-$616.2M
YoY Change	-218.73%	2206.54%	1521.58%
INVESTING ACTIVITIES
Capital Expenditures	-$3.900M	-$5.700M	-$1.300M
YoY Change	-31.58%	111.11%	-69.05%
Acquisitions
YoY Change
Other Investing Activities	$513.2M	$98.60M	$99.30M
YoY Change	420.49%	-9.37%	179.72%
Cash From Investing Activities	$509.3M	$92.90M	$98.00M
YoY Change	448.22%	-12.44%	213.1%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	437.2M	402.1M	659.7M
YoY Change	8.73%	-1092.84%	212.21%
NET CHANGE
Cash From Operating Activities	419.0M	-352.9M	-616.2M
Cash From Investing Activities	509.3M	92.90M	98.00M
Cash From Financing Activities	437.2M	402.1M	659.7M
Net Change In Cash	1.366B	142.1M	141.5M
YoY Change	860.94%	182.5%	-30.84%
FREE CASH FLOW
Cash From Operating Activities	$419.0M	-$352.9M	-$616.2M
Capital Expenditures	-$3.900M	-$5.700M	-$1.300M
Free Cash Flow	$422.9M	-$347.2M	-$614.9M
YoY Change	-221.8%	2655.56%	1719.23%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000351569
CY2017	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201712Member
CY2018	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201602Member
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201613Member
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssets
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssets
CY2019Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilities
CY2020Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilities
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-13901
CY2020	dei	Entity Registrant Name EntityRegistrantName	AMERIS BANCORP
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	69618973	shares
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	GA
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	58-1456434
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	3490 Piedmont Road N.E., Suite 1550
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Atlanta
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	GA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	30305
CY2020	dei	City Area Code CityAreaCode	404
CY2020	dei	Local Phone Number LocalPhoneNumber	639-6500
CY2020	dei	Security12b Title Security12bTitle	Common Stock, par value $1 per share
CY2020	dei	Trading Symbol TradingSymbol	ABCB
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	1550000000	USD
CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	203349000	USD
CY2019Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	246234000	USD
CY2020Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	1893957000	USD
CY2019Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	351202000	USD
CY2020Q4	us-gaap	Federal Funds Sold FederalFundsSold	20000000	USD
CY2019Q4	us-gaap	Federal Funds Sold FederalFundsSold	24413000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	2117306000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	621849000	USD
CY2020Q4	us-gaap	Time Deposits At Carrying Value TimeDepositsAtCarryingValue	249000	USD
CY2019Q4	us-gaap	Time Deposits At Carrying Value TimeDepositsAtCarryingValue	249000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Current DebtSecuritiesAvailableForSaleAllowanceForCreditLossCurrent	112000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Current DebtSecuritiesAvailableForSaleAllowanceForCreditLossCurrent	0	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	982879000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1403403000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	28202000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	66919000	USD
CY2020Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	1001807000	USD
CY2019Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	1656711000	USD
CY2020Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	1167659000	USD
CY2019Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	1656711000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	14480925000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12818476000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	199422000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	38189000	USD
CY2020Q4	us-gaap	Notes Receivable Net NotesReceivableNet	14281503000	USD
CY2019Q4	us-gaap	Notes Receivable Net NotesReceivableNet	12780287000	USD
CY2020Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	11880000	USD
CY2019Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	19500000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	222890000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	233102000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	928005000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	931637000	USD
CY2020Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	71974000	USD
CY2019Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	91586000	USD
CY2020Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	176467000	USD
CY2019Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	175270000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	33314000	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	2180000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	416310000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	259886000	USD
CY2020Q4	us-gaap	Assets Assets	20438638000	USD
CY2019Q4	us-gaap	Assets Assets	18242579000	USD
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	6151070000	USD
CY2019Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	4199448000	USD
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	10806753000	USD
CY2019Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	9827625000	USD
CY2020Q4	us-gaap	Deposits Deposits	16957823000	USD
CY2019Q4	us-gaap	Deposits Deposits	14027073000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	11641000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	20635000	USD
CY2020Q4	us-gaap	Other Borrowings OtherBorrowings	425155000	USD
CY2019Q4	us-gaap	Other Borrowings OtherBorrowings	1398709000	USD
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	124345000	USD
CY2019Q4	us-gaap	Subordinated Debt SubordinatedDebt	127560000	USD
CY2020Q4	abcb	Fdic Indemnification Liability FdicIndemnificationLiability	0	USD
CY2019Q4	abcb	Fdic Indemnification Liability FdicIndemnificationLiability	19642000	USD
CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	272586000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	179378000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	17791550000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	15772997000	USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1000
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1000
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	71753705	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	71499829	shares
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	71754000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	71500000	USD
CY2020Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1913285000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1907108000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	671510000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	507950000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	33505000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	17995000	USD
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	2212224	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1995996	shares
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	42966000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	34971000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	2647088000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	2469582000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	20438638000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	18242579000	USD
CY2020	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	690909000	USD
CY2019	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	586848000	USD
CY2018	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	378209000	USD
CY2020	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	33086000	USD
CY2019	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	40138000	USD
CY2018	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	29006000	USD
CY2020	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	623000	USD
CY2019	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	593000	USD
CY2018	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	900000	USD
CY2020	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	1739000	USD
CY2019	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	8139000	USD
CY2018	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	4984000	USD
CY2020	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	146000	USD
CY2019	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	676000	USD
CY2018	us-gaap	Interest Income Federal Funds Sold InterestIncomeFederalFundsSold	227000	USD
CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	726503000	USD
CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	636394000	USD
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	413326000	USD
CY2020	us-gaap	Interest Expense Deposits InterestExpenseDeposits	59067000	USD
CY2019	us-gaap	Interest Expense Deposits InterestExpenseDeposits	102533000	USD
CY2018	us-gaap	Interest Expense Deposits InterestExpenseDeposits	49054000	USD
CY2020	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	29683000	USD
CY2019	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	28695000	USD
CY2018	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	20880000	USD
CY2020	us-gaap	Interest Expense InterestExpense	88750000	USD
CY2019	us-gaap	Interest Expense InterestExpense	131228000	USD
CY2018	us-gaap	Interest Expense InterestExpense	69934000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	637753000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	505166000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	343392000	USD
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	125488000	USD
CY2019	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	19758000	USD
CY2018	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	16667000	USD
CY2020	abcb	Financing Receivable Credit Loss Unfunded Commitments Expense Reversal FinancingReceivableCreditLossUnfundedCommitmentsExpenseReversal	19062000	USD
CY2019	abcb	Financing Receivable Credit Loss Unfunded Commitments Expense Reversal FinancingReceivableCreditLossUnfundedCommitmentsExpenseReversal	0	USD
CY2018	abcb	Financing Receivable Credit Loss Unfunded Commitments Expense Reversal FinancingReceivableCreditLossUnfundedCommitmentsExpenseReversal	0	USD
CY2020	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	830000	USD
CY2019	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	0	USD
CY2018	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	0	USD
CY2020	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	145380000	USD
CY2019	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	19758000	USD
CY2018	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	16667000	USD
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	492373000	USD
CY2019	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	485408000	USD
CY2018	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	326725000	USD
CY2020	abcb	Fees And Commissions Depositor Accounts1 FeesAndCommissionsDepositorAccounts1	44145000	USD
CY2019	abcb	Fees And Commissions Depositor Accounts1 FeesAndCommissionsDepositorAccounts1	50792000	USD
CY2018	abcb	Fees And Commissions Depositor Accounts1 FeesAndCommissionsDepositorAccounts1	46128000	USD
CY2020	abcb	Noninterest Income Mortgage Banking NoninterestIncomeMortgageBanking	374077000	USD
CY2019	abcb	Noninterest Income Mortgage Banking NoninterestIncomeMortgageBanking	119409000	USD
CY2018	abcb	Noninterest Income Mortgage Banking NoninterestIncomeMortgageBanking	53654000	USD
CY2020	abcb	Fees And Commissions Other1 FeesAndCommissionsOther1	3914000	USD
CY2019	abcb	Fees And Commissions Other1 FeesAndCommissionsOther1	3566000	USD
CY2018	abcb	Fees And Commissions Other1 FeesAndCommissionsOther1	2971000	USD
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	5000	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	138000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-37000	USD
CY2020	abcb	Gain Loss On Sale Of Small Business Administration Loans GainLossOnSaleOfSmallBusinessAdministrationLoans	7226000	USD
CY2019	abcb	Gain Loss On Sale Of Small Business Administration Loans GainLossOnSaleOfSmallBusinessAdministrationLoans	6058000	USD
CY2018	abcb	Gain Loss On Sale Of Small Business Administration Loans GainLossOnSaleOfSmallBusinessAdministrationLoans	2728000	USD
CY2020	us-gaap	Noninterest Income Other NoninterestIncomeOther	17133000	USD
CY2019	us-gaap	Noninterest Income Other NoninterestIncomeOther	18150000	USD
CY2018	us-gaap	Noninterest Income Other NoninterestIncomeOther	12968000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	446500000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	198113000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	118412000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	360278000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	223938000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	149132000	USD
CY2020	us-gaap	Occupancy Net OccupancyNet	52349000	USD
CY2019	us-gaap	Occupancy Net OccupancyNet	40596000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	29131000	USD
CY2020	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	8046000	USD
CY2019	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	7927000	USD
CY2018	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	5571000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19612000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17713000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9512000	USD
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	46017000	USD
CY2019	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	38513000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	30385000	USD
CY2020	us-gaap	Professional Fees ProfessionalFees	15972000	USD
CY2019	us-gaap	Professional Fees ProfessionalFees	10634000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	6386000	USD
CY2020	us-gaap	Expense Related To Distribution Or Servicing And Underwriting Fees ExpenseRelatedToDistributionOrServicingAndUnderwritingFees	5106000	USD
CY2019	us-gaap	Expense Related To Distribution Or Servicing And Underwriting Fees ExpenseRelatedToDistributionOrServicingAndUnderwritingFees	4082000	USD
CY2018	us-gaap	Expense Related To Distribution Or Servicing And Underwriting Fees ExpenseRelatedToDistributionOrServicingAndUnderwritingFees	4016000	USD
CY2020	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	1391000	USD
CY2019	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	73105000	USD
CY2018	us-gaap	Business Combination Integration Related Costs BusinessCombinationIntegrationRelatedCosts	20499000	USD
CY2020	us-gaap	Fdic Indemnification Asset Period Increase Decrease FDICIndemnificationAssetPeriodIncreaseDecrease	14078000	USD
CY2019	us-gaap	Fdic Indemnification Asset Period Increase Decrease FDICIndemnificationAssetPeriodIncreaseDecrease	1945000	USD
CY2018	us-gaap	Fdic Indemnification Asset Period Increase Decrease FDICIndemnificationAssetPeriodIncreaseDecrease	3408000	USD
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	75780000	USD
CY2019	us-gaap	Other Noninterest Expense OtherNoninterestExpense	53484000	USD
CY2018	us-gaap	Other Noninterest Expense OtherNoninterestExpense	35607000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	598629000	USD
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.80
CY2019	us-gaap	Noninterest Expense NoninterestExpense	471937000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	293647000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	340244000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	211584000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	151490000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78256000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50143000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30463000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	261988000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161441000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	121027000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.78
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.76
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.81
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.77
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.75
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	69256000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	58462000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	43142000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	69426000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	58614000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43248000	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	261988000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161441000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	121027000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	4084000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	6211000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-849000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	15363000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	23365000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-3196000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	12000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	19000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	46000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	70000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	39000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-133000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	30000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	147000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-498000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	112000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	15510000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	22821000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3154000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	277498000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	184262000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	117873000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	804479000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	547127000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	0	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	914000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	5419000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2062000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	121027000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	17431000	USD
CY2018	us-gaap	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAociToRetainedEarningsTaxEffect	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3154000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1456347000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	869294000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	915000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-559000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	5139000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3220000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	18410000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161441000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.50
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	30350000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	22821000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	2469582000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	2469582000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	289000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-221000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2262000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4101000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	7995000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	261988000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	41724000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	15510000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	2647088000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	261988000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161441000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	121027000	USD
CY2020	us-gaap	Depreciation Depreciation	15759000	USD
CY2019	us-gaap	Depreciation Depreciation	13120000	USD
CY2018	us-gaap	Depreciation Depreciation	10014000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-777000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-41000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-133000	USD
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	1715000	USD
CY2019	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	6210000	USD
CY2018	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	0	USD
CY2020	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	145380000	USD
CY2019	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	19758000	USD
CY2018	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	16667000	USD
CY2020	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1049000	USD
CY2019	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-496000	USD
CY2018	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-1301000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	3810000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	3424000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	6241000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19612000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17713000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9512000	USD
CY2020	abcb	Amortization Of Operating Lease Right Of Use Assets AmortizationOfOperatingLeaseRightOfUseAssets	19740000	USD
CY2019	abcb	Amortization Of Operating Lease Right Of Use Assets AmortizationOfOperatingLeaseRightOfUseAssets	10264000	USD
CY2018	abcb	Amortization Of Operating Lease Right Of Use Assets AmortizationOfOperatingLeaseRightOfUseAssets	0	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-7929000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	22821000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1374000	USD
CY2020	abcb	Amortization Of Investment Securities AmortizationOfInvestmentSecurities	6153000	USD
CY2019	abcb	Amortization Of Investment Securities AmortizationOfInvestmentSecurities	4680000	USD
CY2018	abcb	Amortization Of Investment Securities AmortizationOfInvestmentSecurities	4891000	USD
CY2020	us-gaap	Gain Loss On Investments GainLossOnInvestments	5000	USD
CY2019	us-gaap	Gain Loss On Investments GainLossOnInvestments	138000	USD
CY2018	us-gaap	Gain Loss On Investments GainLossOnInvestments	-37000	USD
CY2020	abcb	Accretion Of Discount On Purchased Non Covered Loans AccretionOfDiscountOnPurchasedNonCoveredLoans	-27351000	USD
CY2019	abcb	Accretion Of Discount On Purchased Non Covered Loans AccretionOfDiscountOnPurchasedNonCoveredLoans	-18978000	USD
CY2018	abcb	Accretion Of Discount On Purchased Non Covered Loans AccretionOfDiscountOnPurchasedNonCoveredLoans	-10093000	USD
CY2020	abcb	Net Accretion Of Other Borrowings NetAccretionOfOtherBorrowings	-256000	USD
CY2019	abcb	Net Accretion Of Other Borrowings NetAccretionOfOtherBorrowings	-80000	USD
CY2018	abcb	Net Accretion Of Other Borrowings NetAccretionOfOtherBorrowings	-96000	USD
CY2020	abcb	Amortization Of Subordinated Deferrable Interest Debentures AmortizationOfSubordinatedDeferrableInterestDebentures	1940000	USD
CY2019	abcb	Amortization Of Subordinated Deferrable Interest Debentures AmortizationOfSubordinatedDeferrableInterestDebentures	1655000	USD
CY2018	abcb	Amortization Of Subordinated Deferrable Interest Debentures AmortizationOfSubordinatedDeferrableInterestDebentures	1345000	USD
CY2020	us-gaap	Servicing Asset At Amortized Cost Other Than Temporary Impairments ServicingAssetAtAmortizedCostOtherThanTemporaryImpairments	40067000	USD
CY2019	us-gaap	Servicing Asset At Amortized Cost Other Than Temporary Impairments ServicingAssetAtAmortizedCostOtherThanTemporaryImpairments	508000	USD
CY2018	us-gaap	Servicing Asset At Amortized Cost Other Than Temporary Impairments ServicingAssetAtAmortizedCostOtherThanTemporaryImpairments	0	USD
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	9067706000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	3791311000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1768934000	USD
CY2020	us-gaap	Proceeds From Collection Of Mortgage Loans Held For Sale ProceedsFromCollectionOfMortgageLoansHeldForSale	43663000	USD
CY2019	us-gaap	Proceeds From Collection Of Mortgage Loans Held For Sale ProceedsFromCollectionOfMortgageLoansHeldForSale	17445000	USD
CY2018	us-gaap	Proceeds From Collection Of Mortgage Loans Held For Sale ProceedsFromCollectionOfMortgageLoansHeldForSale	986000	USD
CY2020	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	9864464000	USD
CY2019	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	2620290000	USD
CY2018	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	1542755000	USD
CY2020	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	387124000	USD
CY2019	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	74546000	USD
CY2018	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	37336000	USD
CY2020	abcb	Payments For Origination Of Small Business Administration Loans PaymentsForOriginationOfSmallBusinessAdministrationLoans	97017000	USD
CY2019	abcb	Payments For Origination Of Small Business Administration Loans PaymentsForOriginationOfSmallBusinessAdministrationLoans	41435000	USD
CY2018	abcb	Payments For Origination Of Small Business Administration Loans PaymentsForOriginationOfSmallBusinessAdministrationLoans	27820000	USD
CY2020	abcb	Proceeds From Sale Of Small Business Administration Loans ProceedsFromSaleOfSmallBusinessAdministrationLoans	109296000	USD
CY2019	abcb	Proceeds From Sale Of Small Business Administration Loans ProceedsFromSaleOfSmallBusinessAdministrationLoans	65862000	USD
CY2018	abcb	Proceeds From Sale Of Small Business Administration Loans ProceedsFromSaleOfSmallBusinessAdministrationLoans	33675000	USD
CY2020	abcb	Gain Loss On Sale Of Small Business Administration Loans GainLossOnSaleOfSmallBusinessAdministrationLoans	7226000	USD
CY2019	abcb	Gain Loss On Sale Of Small Business Administration Loans GainLossOnSaleOfSmallBusinessAdministrationLoans	6058000	USD
CY2018	abcb	Gain Loss On Sale Of Small Business Administration Loans GainLossOnSaleOfSmallBusinessAdministrationLoans	2728000	USD
CY2020	abcb	Increase In Cash Surrender Value Of Bank Owned Life Insurance IncreaseInCashSurrenderValueOfBankOwnedLifeInsurance	3630000	USD
CY2019	abcb	Increase In Cash Surrender Value Of Bank Owned Life Insurance IncreaseInCashSurrenderValueOfBankOwnedLifeInsurance	2692000	USD
CY2018	abcb	Increase In Cash Surrender Value Of Bank Owned Life Insurance IncreaseInCashSurrenderValueOfBankOwnedLifeInsurance	1819000	USD
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	948000	USD
CY2019	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	3583000	USD
CY2018	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	0	USD
CY2020	abcb	Gain Loss On Sales Of Other Loans Net GainLossOnSalesOfOtherLoansNet	-386000	USD
CY2019	abcb	Gain Loss On Sales Of Other Loans Net GainLossOnSalesOfOtherLoansNet	-1233000	USD
CY2018	abcb	Gain Loss On Sales Of Other Loans Net GainLossOnSalesOfOtherLoansNet	0	USD
CY2020	abcb	Accretion Of Fdic Loss Share Receivable Net Of Amortization Of Fdic Clawback Payable AccretionOfFdicLossShareReceivableNetOfAmortizationOfFdicClawbackPayable	-997000	USD
CY2019	abcb	Accretion Of Fdic Loss Share Receivable Net Of Amortization Of Fdic Clawback Payable AccretionOfFdicLossShareReceivableNetOfAmortizationOfFdicClawbackPayable	-3865000	USD
CY2018	abcb	Accretion Of Fdic Loss Share Receivable Net Of Amortization Of Fdic Clawback Payable AccretionOfFdicLossShareReceivableNetOfAmortizationOfFdicClawbackPayable	-5156000	USD
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	23892000	USD
CY2019	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	15392000	USD
CY2018	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	10965000	USD
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-6036000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	5855000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	2411000	USD
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-12062000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-3597000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	4032000	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-97730000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	40758000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-10761000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	798396000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-940211000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-108803000	USD
CY2020	us-gaap	Proceeds From Other Deposits ProceedsFromOtherDeposits	0	USD
CY2019	us-gaap	Proceeds From Other Deposits ProceedsFromOtherDeposits	10563000	USD
CY2018	us-gaap	Proceeds From Other Deposits ProceedsFromOtherDeposits	746000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	219352000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	290649000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	435204000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	266171000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	152393000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	64995000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	68727000	USD
CY2020	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	-37222000	USD
CY2019	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	44935000	USD
CY2018	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	-33515000	USD
CY2020	abcb	Increase Decrease In Loan IncreaseDecreaseInLoan	1733057000	USD
CY2019	abcb	Increase Decrease In Loan IncreaseDecreaseInLoan	870132000	USD
CY2018	abcb	Increase Decrease In Loan IncreaseDecreaseInLoan	68113000	USD
CY2020	abcb	Proceeds From Purchased Non Covered Loans Receivable ProceedsFromPurchasedNonCoveredLoansReceivable	12954000	USD
CY2019	abcb	Proceeds From Purchased Non Covered Loans Receivable ProceedsFromPurchasedNonCoveredLoansReceivable	0	USD
CY2018	abcb	Proceeds From Purchased Non Covered Loans Receivable ProceedsFromPurchasedNonCoveredLoansReceivable	0	USD
CY2020	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	0	USD
CY2019	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	103530000	USD
CY2018	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	0	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18116000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11581000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	10009000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	718000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	5587000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	588000	USD
CY2020	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	14059000	USD
CY2019	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	10140000	USD
CY2018	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	11784000	USD
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	3381000	USD
CY2020	abcb	Payments To Fdic Under Loss Share Agreements PaymentsToFDICUnderLossShareAgreements	20639000	USD
CY2019	abcb	Payments To Fdic Under Loss Share Agreements PaymentsToFDICUnderLossShareAgreements	3710000	USD
CY2018	abcb	Payments To Fdic Under Loss Share Agreements PaymentsToFDICUnderLossShareAgreements	3791000	USD
CY2019	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	7429000	USD
CY2018	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	69965000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	157087000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Receivable ProceedsFromSaleOfLoansReceivable	0	USD
CY2020	abcb	Net Proceeds From Acquisition NetProceedsFromAcquisition	-2417000	USD
CY2019	abcb	Net Proceeds From Acquisition NetProceedsFromAcquisition	244181000	USD
CY2018	abcb	Net Proceeds From Acquisition NetProceedsFromAcquisition	51495000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1200726000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-487087000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-53314000	USD
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	2932864000	USD
CY2019	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	334437000	USD
CY2018	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	853051000	USD
CY2020	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-8994000	USD
CY2019	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-22094000	USD
CY2018	us-gaap	Proceeds From Payments For In Securities Sold Under Agreements To Repurchase ProceedsFromPaymentsForInSecuritiesSoldUnderAgreementsToRepurchase	-10254000	USD
CY2020	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	7202981000	USD
CY2019	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	5236572000	USD
CY2018	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	1530000000	USD
CY2020	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	8176491000	USD
CY2019	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	4141349000	USD
CY2018	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	1844258000	USD
CY2020	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	5155000	USD
CY2019	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2018	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2262000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	5139000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	914000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	41685000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	24675000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	16405000	USD
CY2020	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	7995000	USD
CY2019	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	18410000	USD
CY2018	us-gaap	Payments For Repurchase Of Equity PaymentsForRepurchaseOfEquity	2062000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1897787000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1369620000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	510986000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1495457000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-57678000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	348869000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	621849000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	679527000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	330658000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2117306000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	621849000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	679527000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	94786000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	125373000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	67523000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	98609000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	35865000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	20026000	USD
CY2020	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	7398000	USD
CY2019	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	6229000	USD
CY2018	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	10517000	USD
CY2020	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	196804000	USD
CY2019	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	0	USD
CY2018	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	10817000	USD
CY2020	abcb	Transfer Of Portfolio Loans To Loans Held For Sale TransferOfPortfolioLoansToLoansHeldForSale	179407000	USD
CY2019	abcb	Transfer Of Portfolio Loans To Loans Held For Sale TransferOfPortfolioLoansToLoansHeldForSale	8293000	USD
CY2018	abcb	Transfer Of Portfolio Loans To Loans Held For Sale TransferOfPortfolioLoansToLoansHeldForSale	8831000	USD
CY2020	abcb	Transfer From Loans To Loans Provided For Sales Of Other Real Estate Owned TransferFromLoansToLoansProvidedForSalesOfOtherRealEstateOwned	767000	USD
CY2019	abcb	Transfer From Loans To Loans Provided For Sales Of Other Real Estate Owned TransferFromLoansToLoansProvidedForSalesOfOtherRealEstateOwned	144000	USD
CY2018	abcb	Transfer From Loans To Loans Provided For Sales Of Other Real Estate Owned TransferFromLoansToLoansProvidedForSalesOfOtherRealEstateOwned	931000	USD
CY2020	abcb	Non Cash Change In Operating Lease Right Of Use Asset NonCashChangeInOperatingLeaseRightOfUseAsset	0	USD
CY2019	abcb	Non Cash Change In Operating Lease Right Of Use Asset NonCashChangeInOperatingLeaseRightOfUseAsset	27286000	USD
CY2018	abcb	Non Cash Change In Operating Lease Right Of Use Asset NonCashChangeInOperatingLeaseRightOfUseAsset	0	USD
CY2020	abcb	Non Cash Change In Operating Lease Liability NonCashChangeInOperatingLeaseLiability	0	USD
CY2019	abcb	Non Cash Change In Operating Lease Liability NonCashChangeInOperatingLeaseLiability	29651000	USD
CY2018	abcb	Non Cash Change In Operating Lease Liability NonCashChangeInOperatingLeaseLiability	0	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	54107000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	6016000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	23320000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2020	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	0	USD
CY2019	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	5194955000	USD
CY2018	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	3064615000	USD
CY2020	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	0	USD
CY2019	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	4325642000	USD
CY2018	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	2415212000	USD
CY2020	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	0	USD
CY2019	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	869294000	USD
CY2018	us-gaap	Business Combination Consideration Transferred Equity Interests Issued And Issuable BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable	547127000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	15363000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-3266000	USD
CY2020	abcb	Change In Unrealized Gain Loss On Cash Flow Hedges Interest Rate Floor Interest Rate Swap ChangeInUnrealizedGainLossOnCashFlowHedgesInterestRateFloorInterestRateSwap	147000	USD
CY2019	abcb	Change In Unrealized Gain Loss On Cash Flow Hedges Interest Rate Floor Interest Rate Swap ChangeInUnrealizedGainLossOnCashFlowHedgesInterestRateFloorInterestRateSwap	-499000	USD
CY2018	abcb	Change In Unrealized Gain Loss On Cash Flow Hedges Interest Rate Floor Interest Rate Swap ChangeInUnrealizedGainLossOnCashFlowHedgesInterestRateFloorInterestRateSwap	112000	USD
CY2020Q4	abcb	Cash Reserve Deposit Required Rate CashReserveDepositRequiredRate	0
CY2020Q4	abcb	Reserve Requirement Cash Or On Deposit ReserveRequirementCashOrOnDeposit	0	USD
CY2019Q4	abcb	Reserve Requirement Cash Or On Deposit ReserveRequirementCashOrOnDeposit	109700000	USD
CY2020	abcb	Noninterest Income Bank Servicing Fees NoninterestIncomeBankServicingFees	37200000	USD
CY2019	abcb	Noninterest Income Bank Servicing Fees NoninterestIncomeBankServicingFees	19900000	USD
CY2018	abcb	Noninterest Income Bank Servicing Fees NoninterestIncomeBankServicingFees	4500000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Allowance for Credit Losses - Loans</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Under the current expected credit loss model, the allowance for credit losses (“ACL”) on loans is a valuation allowance estimated at each balance sheet date in accordance with GAAP that is deducted from the loans’ amortized cost basis to present the net amount expected to be collected on the loans. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company estimates the ACL on loans based on the underlying loans’ amortized cost basis, which is the amount at which the financing receivable is originated or acquired, adjusted for applicable accretion or amortization of premium, discount, and net deferred fees or costs, collection of cash, and charge-offs. In the event that collection of principal becomes uncertain, the Company has policies in place to reverse accrued interest in a timely manner. Therefore, the Company has made a policy election to exclude accrued interest from the measurement of ACL. Accrued interest receivable on loans is reported in other assets on the consolidated balance sheets and totaled $73.4 million at December 31, 2020. During the year ended December 31, 2020, the Company established an ACL of $718,000 related to deferred interest on loans modified under its Disaster Relief Program. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Expected credit losses are reflected in the allowance for credit losses through a charge to provision for credit losses. The Company measures expected credit losses of loans on a collective (pool) basis, when the loans share similar risk characteristics. Depending on the nature of the pool of loans with similar risk characteristics, the Company uses the discounted cash flow (“DCF”) method, the vintage method, the PD×LGD method or a qualitative approach as discussed further below. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company’s methodologies for estimating the ACL consider available relevant information about the collectability of cash flows, including information about past events, current conditions, and reasonable and supportable forecasts. The methodologies apply historical loss information, adjusted for asset-specific characteristics, economic conditions at the measurement date, and forecasts about future economic conditions expected to exist through the contractual lives of the financial assets that are reasonable and supportable, to the identified pools of loans with similar risk characteristics for which the historical loss experience was observed. The Company’s methodologies revert back to historical loss information on a straight-line basis over four quarters when it can no longer develop reasonable and supportable forecasts. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has identified the following pools of loans with similar risk characteristics for measuring expected credit losses: </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Commercial, financial, and agricultural</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - These loans include both secured and unsecured loans for working capital, expansion, crop production and other business purposes. Commercial, financial and agricultural loans also include certain U.S. Small Business Administration (“SBA”) loans, including loans outstanding under the SBA's Paycheck Protection Program ("PPP"). Short-term working capital loans are secured by non-real estate collateral such as accounts receivable, crops, inventory and equipment. The Bank evaluates the financial strength, cash flow, management, credit history of the borrower and the quality of the collateral securing the loan. The Bank often requires personal guarantees and secondary sources of repayment on commercial, financial and agricultural loans.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Consumer installment</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - These loans include home improvement loans, direct automobile loans, boat and recreational vehicle financing, and both secured and unsecured personal loans. Consumer loans carry greater risks than other loans, as the collateral can consist of rapidly depreciating assets such as automobiles and equipment that may not provide an adequate source of repayment of the loan in the case of default.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Indirect automobile </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">- Indirect automobile loans are secured by automobile collateral, generally new and used cars and trucks from auto dealers that operate within selected states. Repayment of these loans depends largely on the personal income of the borrowers which can be affected by changes in economic conditions such as unemployment levels. Collateral consists of rapidly depreciating assets that may not provide an adequate source of repayment of the loan in the event of default. </span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Mortgage warehouse</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Mortgage Warehouse facilities are provided to unaffiliated mortgage origination companies and are collateralized by one-to-four family residential loans or mortgage servicing rights. The originator closes new mortgage loans with the intent to sell these loans to third party investors for a profit. The Bank provides funding to the mortgage companies for the period between the origination and their sale of the loan. The Bank has a policy that requires that it separately validate that each residential mortgage loan was underwritten consistent with the underwriting requirements of the final investor or market standards prior to advancing funds. The Bank is repaid with the proceeds received from sale of the mortgage loan to the final investor.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Municipal </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">- Municipal loans consists of loans made to counties, municipalities and political subdivisions. The source of repayment for these loans is either general revenue of the municipality or revenues of the project being financed by the loan. These loans may be secured by real estate, machinery, equipment or assignment of certain revenues. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Premium Finance</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Premium finance provides loans for the acquisition of certain commercial insurance policies. Repayment of these loans is dependent on the cash flow of the insured which can be affected by changes in economic conditions. The Bank has procedures in place to cancel the insurance policy after default by the borrower to minimize the risk of loss. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Real Estate - Construction and Development</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Construction and development loans include loans for the development of residential neighborhoods, one-to-four family home residential construction loans to builders and consumers, and commercial real estate construction loans, primarily for owner-occupied and investment properties. The Company limits its construction lending risk through adherence to established underwriting procedures.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Real Estate - Commercial and Farmland</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - Commercial real estate loans include loans secured by owner-occupied commercial buildings for office, storage, retail, farmland and warehouse space. They also include non-owner occupied commercial buildings such as leased retail and office space. Lodging (hotel / motel) loans are a subsegment of commercial real estate loans. Commercial real estate loans may be larger in size and may involve a greater degree of risk than one-to-four family residential mortgage loans. Payments on such loans are often dependent on successful operation or management of the properties.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Real Estate - Residential</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> - The Company's residential loans represent permanent mortgage financing and are secured by residential properties located within the Bank's market areas. Residential real estate loans also include purchased loan pools secured by residential properties located outside the Bank's market area. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">Discounted Cash Flow Method</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company uses the discounted cash flow method to estimate expected credit losses for the commercial, financial and agricultural, consumer installment, real estate - construction and development, real estate - commercial and farmland and real estate - residential loan segments. For each of these loan segments, the Company generates cash flow projections at the instrument level wherein payment expectations are adjusted for estimated prepayment speed, curtailments, time to recovery, probability of default, and loss given default. The modeling of expected prepayment speeds, curtailment rates, and time to recovery are based on historical internal data adjusted based upon peer data. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company uses regression analysis of historical internal and peer data to determine suitable loss drivers to utilize when modeling lifetime probability of default and loss given default. This analysis also determines how expected probability of default and loss given default will react to forecasted levels of the loss drivers. For all loan pools utilizing the DCF method, the Company uses a combination of national and regional data including gross domestic product, home price indices, unemployment rates, retail sales, and rental vacancy rates depending on the nature of the underlying loan pool and how well that loss driver correlates to expected future losses. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For all DCF models, management has determined that four quarters represents a reasonable and supportable forecast period and reverts back to a historical loss rate over four quarters on a straight-line basis. Management leverages economic projections from a reputable and independent third party to inform its loss driver forecasts over the four-quarter forecast period. Other internal and external indicators of economic forecasts are also considered by management when developing the forecast metrics.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The combination of adjustments for credit expectations (default and loss) and timing expectations (prepayment, curtailment, and time to recovery) produces an expected cash flow stream at the instrument level. Instrument effective yield is calculated, net of the impacts of prepayment assumptions, and the instrument expected cash flows are then discounted at that effective yield to produce an instrument-level net present value of expected cash flows (“NPV”). An ACL is established for the difference between the instrument’s NPV and amortized cost basis.</span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">Vintage Method</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company uses a vintage method to estimate expected credit losses for the indirect automobile loans segment. The Company’s vintage analysis is based on loss rates by origination date and includes data on loan amounts, loan charge-offs and recoveries by date. Using this information, vintage tables are created to evaluate loss rate patterns and develop estimated losses by vintage year. Once the tables have been calculated, reserves are estimated by multiplying the balance of a given origination year by the remaining loss to be experienced by that vintage. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">PD×LGD Method</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company uses the PD×LGD method to estimate expected credit losses (“EL”) for the premium finance and municipal loan segments. Under the PD×LGD method, the loss rate is a function of two components: (1) the lifetime default rate (“PD”); and (2) the loss given default (“LGD”). For the premium finance loan segment, calculations of lifetime default rates and corresponding loss given default rates of static pools are performed. The PD×LGD method uses the default rates and loss given default rates of different static pools to quantify the relationship between those rates and the credit mix of the pools and applies that relationship on a going forward basis. The Company has not incurred any historical defaults or charge offs in its municipal portfolio. Therefore, in lieu of historical loss rates, the Company applies historical benchmarking PD and LGD ratios provided by a reputable and independent third party to the current municipal loan balance.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">Qualitative Factors</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company uses qualitative factors for model risk uncertainty as well as for loan segment specific risks that cannot be addressed in the quantitative methods. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">Individually Evaluated Assets</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Loans that do not share risk characteristics are evaluated on an individual basis. For collateral dependent loans where the Company has determined that foreclosure of the collateral is probable, or where the borrower is experiencing financial difficulty and the Company expects repayment of the loan to be provided substantially through the operation or sale of the collateral, the ACL is measured based on the difference between the fair value of the collateral and the amortized cost basis of the loan as of the measurement date. When repayment is expected to be from the operation of the collateral, expected credit losses are calculated as the amount by which the amortized cost basis of the loan exceeds the present value of expected cash flows from the operation of the collateral. The Company may, in the alternative, measure the expected credit loss as the amount by which the amortized cost basis of the loan exceeded the estimated fair value of the collateral. When repayment is expected to be from the sale of the collateral, expected credit losses are calculated as the amount by which the amortized costs basis of the loan exceeds the fair value of the underlying collateral less estimated cost to sell. The ACL may be zero if the fair value of the collateral at the measurement date exceeds the amortized cost basis of the loan.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company’s estimate of the ACL reflects losses expected over the remaining contractual life of the loans. The contractual term does not consider extensions, renewals or modifications unless the Company has identified an expected troubled debt restructuring. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">A loan that has been modified or renewed is considered a troubled debt restructuring (“TDR”) when two conditions are met: (1) the borrower is experiencing financial difficulty; and (2) concessions are made for the borrower's benefit that would not otherwise be considered for a borrower or transaction with similar credit risk characteristics. The Company’s ACL reflects all effects of a TDR when an individual asset is specifically identified as a reasonably expected TDR. The Company has determined that a TDR is reasonably expected no later than the point when the lender concludes that modification is the best course of action and it is at least reasonably possible that the troubled borrower will accept some form of concession from the lender to avoid a default. Reasonably expected TDRs and executed non-performing TDRs are evaluated individually to determine the required ACL. TDRs performing in accordance with their modified contractual terms for a reasonable period of time may be included in the Company’s existing pools based on the underlying risk characteristics of the loan to measure the ACL.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Guidance on Non-TDR Loan Modifications due to COVID-19</span></div><div><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In April 2020, various regulatory agencies, including the Board of Governors of the Federal Reserve System (the "FRB") and the Federal Deposit Insurance Corporation (the "FDIC"), issued a revised interagency statement encouraging financial institutions to work with customers affected by COVID-19 and providing additional information regarding loan modifications. The revised interagency statement clarifies the interaction between the interagency statement issued on March 22, 2020 and the </span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">temporary relief provided by Section 4013 of the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”). Section 4013 of the CARES Act allows financial institutions to suspend the requirements to classify certain loan modifications as TDRs. The revised statement also provides supervisory interpretations on past due and nonaccrual regulatory reporting of loan modification programs and regulatory capital. This interagency guidance is expected to reduce the number of TDRs that will be reported in future periods; however, the amount is indeterminable and will depend on future developments, which are highly uncertain and cannot be accurately predicted, including the scope and duration of the pandemic and actions taken by governmental authorities and other third parties in response to the pandemic. In December 2020, the 2021 Consolidated Appropriations Act was signed into law and extended the provisions of Section 4013 through the earlier of 60 days after the national emergency termination date or January 1, 2022. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">Charge-offs and Recoveries</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Loan losses are charged against the allowance when management believes the collection of a loan’s principal is unlikely. Subsequent recoveries are credited to the allowance. Consumer loans are charged-off in accordance with the Federal Financial Institutions Examination Council’s (“FFIEC”) Uniform Retail Credit Classification and Account Management Policy. Commercial loans are charged-off when they are deemed uncollectible, which usually involves a triggering event within the collection effort. If the loan is collateral dependent, the loss is more easily identified and is charged-off when it is identified, usually based upon receipt of an appraisal. However, when a loan has guarantor support, and the guarantor demonstrates willingness and capacity to support the debt, the Company may carry the estimated loss as a reserve against the loan while collection efforts with the guarantor are pursued. If, after collection efforts with the guarantor are complete, the deficiency is still considered uncollectible, the loss is charged-off and any further collections are treated as recoveries. In all situations, when a loan is downgraded to a loan risk rating of 9 (Loss per the regulatory guidance), the uncollectible portion is charged-off.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Allowance for Credit Losses - Loans (prior to the adoption of ASU 2016-13)</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Prior to the adoption of ASU 2016-13, the ACL was an amount that represented a reserve for probable incurred losses in the loan portfolio. The ACL was evaluated on a regular basis by management and was based upon management’s periodic review of various risks in the loan portfolio highlighted by historical experience, the nature and volume of the loan portfolio, overall portfolio quality, review of specific problem loans, current economic conditions that may affect the borrower’s ability to pay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation was inherently subjective as it required estimates that were susceptible to significant revision as more information became available. The ACL evaluation did not include the effects of expected losses on specific loans or groups of loans that were related to future events or expected changes in economic conditions. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The ACL consists of specific and general components. The specific component included loans management considered impaired and other loans or groups of loans that management classified with higher risk characteristics. For such loans that were classified as impaired, an allowance was established when the discounted cash flows, collateral value or observable market price of the impaired loan was lower than the carrying value of that loan. The general component covers non-classified loans and was based on historical loss experience adjusted for qualitative factors.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company segregated the loan portfolio by type of loan and utilized this segregation in evaluating exposure to risks within the portfolio. In addition, based on internal reviews and external reviews performed by independent loan reviewers and regulatory authorities, the Company further segregated the loan portfolio by loan grades based on an assessment of risk for a particular loan or group of loans. In establishing allowances, management considered historical loan loss experience but adjusted this data with a significant emphasis on data such as risk ratings, current loan quality trends, current economic conditions and other factors in the markets where the Company operates. Factors considered include, among others, current valuations of real estate in their markets, unemployment rates, the effect of weather conditions on agricultural related entities and other significant local economic events.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company developed a methodology for determining the adequacy of the allowance for loan losses which was monitored by the Company’s Chief Credit Officer. Procedures provided for the assignment of a risk rating for every loan included in the total loan portfolio. Commercial insurance premium loans, overdraft protection loans and certain mortgage loans and consumer loans serviced by outside processors were treated as pools for risk rating purposes. The risk rating schedule provides nine ratings of which five ratings are classified as pass ratings and four ratings are classified as criticized ratings. Each risk rating is assigned a percentage factor of historical losses, calculated by loan type, and adjusted for qualitative factors to be applied to the balance of loans by risk rating and loan type, to determine the adequate amount of reserve. Many of the larger loans require an annual review by an independent loan officer in the Company’s internal loan review department. Assigned risk ratings are adjusted based on various factors including changes in borrower’s financial condition, the number of days past due and general </span></div>economic conditions. The calculation of the allowance for loan losses, including underlying data and assumptions, is reviewed quarterly by the independent internal loan review department.
CY2020Q4	abcb	Deferred Interest On Financing Receivable Allowance For Credit Losses DeferredInterestOnFinancingReceivableAllowanceForCreditLosses	718000	USD
CY2020	abcb	Financing Receivable Number Of Risk Ratings FinancingReceivableNumberOfRiskRatings	9	rating
CY2020	abcb	Financing Receivable Number Of Risk Ratings Pass FinancingReceivableNumberOfRiskRatingsPass	5	rating
CY2020	abcb	Financing Receivable Number Of Risk Ratings Criticized FinancingReceivableNumberOfRiskRatingsCriticized	4	rating
CY2020Q4	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P13Y
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	6200000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3900000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3400000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	261988000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	161441000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	121027000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	69256000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	58462000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	43142000	shares
CY2020	abcb	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	23000	shares
CY2019	abcb	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	69000	shares
CY2018	abcb	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	6000	shares
CY2020	abcb	Incremental Common Shares Attributable To Dilutive Restricted Grants IncrementalCommonSharesAttributableToDilutiveRestrictedGrants	129000	shares
CY2019	abcb	Incremental Common Shares Attributable To Dilutive Restricted Grants IncrementalCommonSharesAttributableToDilutiveRestrictedGrants	83000	shares
CY2018	abcb	Incremental Common Shares Attributable To Dilutive Restricted Grants IncrementalCommonSharesAttributableToDilutiveRestrictedGrants	100000	shares
CY2020	abcb	Incremental Common Shares Attributable To Performance Share Units IncrementalCommonSharesAttributableToPerformanceShareUnits	18000	shares
CY2019	abcb	Incremental Common Shares Attributable To Performance Share Units IncrementalCommonSharesAttributableToPerformanceShareUnits	0	shares
CY2018	abcb	Incremental Common Shares Attributable To Performance Share Units IncrementalCommonSharesAttributableToPerformanceShareUnits	0	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	69426000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	58614000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	43248000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	197765	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Derivative Instruments and Hedging Activities</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company had a cash flow hedge that matured September 15, 2020 with notional amount of $37.1 million at December 31, 2019 for the purpose of converting the variable rate on certain junior subordinated debentures to a fixed rate of 4.11%. The fair value of this instrument was a liability of $187,000 as of December 31, 2019. No material hedge ineffectiveness from cash flow </span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">was recognized in the statement of operations. All components of each derivative’s gain or loss are included in the assessment of hedge effectiveness.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The goal of the Company’s interest rate risk management process is to minimize the volatility in the net interest margin caused by changes in interest rates. Derivative instruments are used to hedge certain assets or liabilities as a part of this process. The Company is required to recognize certain contracts and commitments as derivatives when the characteristics of those contracts and commitments meet the definition of a derivative. All derivative instruments are required to be carried at fair value on the balance sheet.</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company’s hedging strategies include utilizing an interest rate swap classified as a cash flow hedge. Cash flow hedges relate to converting the variability in future interest payments on a floating rate liability to fixed payments. When effective, the fair value of cash flow hedges is carried as a component of other comprehensive income rather than an income statement item.</span></div>
CY2019Q4	us-gaap	Derivative Fixed Interest Rate DerivativeFixedInterestRate	0.0411
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	51800000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	7800000	USD
CY2020Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	16400000	USD
CY2019Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	4500000	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	5	segment
CY2020Q1	abcb	Financing Receivable Allowance For Unfunded Commitments FinancingReceivableAllowanceForUnfundedCommitments	12700000	USD
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Reclassifications</span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain reclassifications of prior year amounts have been made to conform with the current year presentations.</span></div>
CY2020	abcb	Business Acquisition Pro Forma Net Interest Income And Non Interest Income BusinessAcquisitionProFormaNetInterestIncomeAndNonInterestIncome	1084253000	USD
CY2019	abcb	Business Acquisition Pro Forma Net Interest Income And Non Interest Income BusinessAcquisitionProFormaNetInterestIncomeAndNonInterestIncome	828612000	USD
CY2018	abcb	Business Acquisition Pro Forma Net Interest Income And Non Interest Income BusinessAcquisitionProFormaNetInterestIncomeAndNonInterestIncome	803281000	USD
CY2020	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	263089000	USD
CY2019	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	228798000	USD
CY2018	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	196352000	USD
CY2020	abcb	Business Acquisitions Pro Forma Net Income Loss Available To Common Share Holders BusinessAcquisitionsProFormaNetIncomeLossAvailableToCommonShareHolders	263089000	USD
CY2019	abcb	Business Acquisitions Pro Forma Net Income Loss Available To Common Share Holders BusinessAcquisitionsProFormaNetIncomeLossAvailableToCommonShareHolders	228798000	USD
CY2018	abcb	Business Acquisitions Pro Forma Net Income Loss Available To Common Share Holders BusinessAcquisitionsProFormaNetIncomeLossAvailableToCommonShareHolders	196352000	USD
CY2020	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	3.80
CY2019	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	3.29
CY2018	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.82
CY2020	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	3.79
CY2019	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	3.29
CY2018	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.82
CY2020	abcb	Business Acquisition Pro Forma Weighted Average Number Of Shares Outstanding Basic BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingBasic	69256000	shares
CY2019	abcb	Business Acquisition Pro Forma Weighted Average Number Of Shares Outstanding Basic BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingBasic	69462000	shares
CY2018	abcb	Business Acquisition Pro Forma Weighted Average Number Of Shares Outstanding Basic BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingBasic	69642000	shares
CY2020	abcb	Business Acquisition Pro Forma Weighted Average Number Of Shares Outstanding Diluted BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingDiluted	69426000	shares
CY2019	abcb	Business Acquisition Pro Forma Weighted Average Number Of Shares Outstanding Diluted BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingDiluted	69614000	shares
CY2018	abcb	Business Acquisition Pro Forma Weighted Average Number Of Shares Outstanding Diluted BusinessAcquisitionProFormaWeightedAverageNumberOfSharesOutstandingDiluted	69748000	shares
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	42854000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1403403000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	940580000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	112000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	443000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	982879000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1380438000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	24261000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1296000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	29918000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	30228000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	49109000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	51276000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	66769000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	68972000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	46263000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	48199000	USD
CY2020Q4	abcb	Mortgage Backed Securities Amortized Cost MortgageBackedSecuritiesAmortizedCost	748521000	USD
CY2020Q4	us-gaap	Mortgage Backed Securities Available For Sale Fair Value Disclosure MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure	784204000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	940580000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	982879000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	34279000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	347000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	3950000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	96000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	38229000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	443000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	131176000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	705000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	57151000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	591000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	188327000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1296000	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Purchased With Credit Deterioration Increase DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	112000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	443000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Purchased With Credit Deterioration Increase DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	112000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	112000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	522000	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	19000	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	390000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	464000	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	301000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	58000	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	89000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	64995000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	68727000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	58000	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	89000	USD
CY2020	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	5000	USD
CY2018	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-126000	USD
CY2020	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	USD
CY2019	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	61000	USD
CY2018	us-gaap	Gain Loss On Sale Of Other Investments GainLossOnSaleOfOtherInvestments	0	USD
CY2020	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	5000	USD
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	138000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-37000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	14480925000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12818476000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	76457000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	75124000	USD
CY2020	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	0	USD
CY2020Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	13494000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	134659000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	14346266000	USD
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	14480925000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	8326000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	184006000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	12634470000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12818476000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	5754000	USD
CY2020Q4	abcb	Financing Receivable Collateral Dependent Loans FinancingReceivableCollateralDependentLoans	123100000	USD
CY2020Q4	abcb	Financing Receivable Collateral Dependent Loans FinancingReceivableCollateralDependentLoans	123082000	USD
CY2020Q4	abcb	Financing Receivable Collateral Allowance For Credit Losses FinancingReceivableCollateralAllowanceForCreditLosses	24656000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	133302000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	31375000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	73358000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	104733000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	6447000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	90545000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12818476000	USD
CY2020Q4	abcb	Loans Modified That Are Not Troubled Debt Restructurings LoansModifiedThatAreNotTroubledDebtRestructurings	436000000.0	USD
CY2019Q4	abcb	Loans Modified That Are Not Troubled Debt Restructurings LoansModifiedThatAreNotTroubledDebtRestructurings	325700000	USD
CY2020Q4	abcb	Troubled Debt Restructurings Excluding Purchased Loans TroubledDebtRestructuringsExcludingPurchasedLoans	85000000.0	USD
CY2019Q4	abcb	Troubled Debt Restructurings Excluding Purchased Loans TroubledDebtRestructuringsExcludingPurchasedLoans	35200000	USD
CY2020	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	1200000	USD
CY2019	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	1900000	USD
CY2020Q4	abcb	Financing Receivable Short Term Deferral Amount FinancingReceivableShortTermDeferralAmount	332800000	USD
CY2020Q4	abcb	Financing Receivable Short Term Deferral Amount FinancingReceivableShortTermDeferralAmount	332779000	USD
CY2020Q4	abcb	Financing Receivable Short Term Deferral Percentage FinancingReceivableShortTermDeferralPercentage	0.023
CY2018Q4	abcb	Financing Receivable Related Parties FinancingReceivableRelatedParties	3072000	USD
CY2020	abcb	Financing Receivable Related Parties Additions FinancingReceivableRelatedPartiesAdditions	34132000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	38189000	USD
CY2019Q4	abcb	Financing Receivable Related Parties FinancingReceivableRelatedParties	36468000	USD
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	125488000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	54464000	USD
CY2019	abcb	Financing Receivable Related Parties Additions FinancingReceivableRelatedPartiesAdditions	8938000	USD
CY2020	abcb	Financing Receivable Related Parties Proceeds FinancingReceivableRelatedPartiesProceeds	1205000	USD
CY2019	abcb	Financing Receivable Related Parties Proceeds FinancingReceivableRelatedPartiesProceeds	2554000	USD
CY2020	abcb	Financing Receivable Related Parties Transactions Due To Changes In Related Parties FinancingReceivableRelatedPartiesTransactionsDueToChangesInRelatedParties	0	USD
CY2019	abcb	Financing Receivable Related Parties Transactions Due To Changes In Related Parties FinancingReceivableRelatedPartiesTransactionsDueToChangesInRelatedParties	27012000	USD
CY2020Q4	abcb	Financing Receivable Related Parties FinancingReceivableRelatedParties	69395000	USD
CY2019Q4	abcb	Financing Receivable Related Parties FinancingReceivableRelatedParties	36468000	USD
CY2019	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	19758000	USD
CY2020	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	11548000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	199422000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	28819000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	19861000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	9473000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	38189000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	7162000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	31027000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	38189000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	82475000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	12609278000	USD
CY2019Q4	abcb	Financing Receivable Acquired With Deteriorated Credit Quality FinancingReceivableAcquiredWithDeterioratedCreditQuality	126723000	USD
CY2019Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	12818476000	USD
CY2017Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	25791000	USD
CY2018	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	16667000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	21131000	USD
CY2018	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	7492000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	28819000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	4964000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	23855000	USD
CY2018Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	28819000	USD
CY2018Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	53893000	USD
CY2018Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	8370430000	USD
CY2018Q4	abcb	Financing Receivable Acquired With Deteriorated Credit Quality FinancingReceivableAcquiredWithDeterioratedCreditQuality	87591000	USD
CY2018Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	8511914000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	312779000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	314095000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	89889000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	80993000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	222890000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	233102000	USD
CY2020	us-gaap	Depreciation Depreciation	15800000	USD
CY2019	us-gaap	Depreciation Depreciation	13100000	USD
CY2018	us-gaap	Depreciation Depreciation	10000000.0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	931637000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	503434000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2019	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-2294000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	928005000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	430497000	USD
CY2020	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-3632000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	931637000	USD
CY2019	abcb	Goodwill Acquired During Period Net Of Purchase Accounting Adjustments GoodwillAcquiredDuringPeriodNetOfPurchaseAccountingAdjustments	428200000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	72000000.0	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	91600000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	131565000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	59591000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	131565000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	39979000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19600000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	17700000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9500000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	14965000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	12554000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	11054000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	9999000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	8937000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	14465000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	71974000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	259478000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	1691527000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	48951000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	21607000	USD
CY2020Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	21873000	USD
CY2020Q4	us-gaap	Time Deposits Noncurrent TimeDepositsNoncurrent	1346000	USD
CY2020Q4	us-gaap	Time Deposits TimeDeposits	2044782000	USD
CY2020Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	524300000	USD
CY2019Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	702300000	USD
CY2020Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	430200000	USD
CY2019Q4	us-gaap	Interest Bearing Domestic Deposit Brokered InterestBearingDomesticDepositBrokered	452700000	USD
CY2020Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	125200000	USD
CY2019Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	118500000	USD
CY2020Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	11641000	USD
CY2019Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	20635000	USD
CY2020Q4	us-gaap	Other Borrowings OtherBorrowings	425155000	USD
CY2019Q4	us-gaap	Other Borrowings OtherBorrowings	1398709000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	3080000000.00	USD
CY2020Q4	abcb	Federal Funds Purchased Maximum Capacity FederalFundsPurchasedMaximumCapacity	127000000.0	USD
CY2020Q4	us-gaap	Pledged Assets Separately Reported Loans Pledged For Other Debt Obligations At Fair Value PledgedAssetsSeparatelyReportedLoansPledgedForOtherDebtObligationsAtFairValue	2960000000	USD
CY2020Q4	abcb	Borrowing Capacity Available Based On Pledged Collateral BorrowingCapacityAvailableBasedOnPledgedCollateral	1900000000	USD
CY2020Q4	us-gaap	Common Stock Issued Employee Stock Trust CommonStockIssuedEmployeeStockTrust	4700000	USD
CY2019Q4	us-gaap	Common Stock Issued Employee Stock Trust CommonStockIssuedEmployeeStockTrust	4900000	USD
CY2020Q4	abcb	Trust Preferred Securities Issuance Amount TrustPreferredSecuritiesIssuanceAmount	154390000	USD
CY2020Q4	abcb	Trust Preferred Securities Unaccreted Purchase Discount TrustPreferredSecuritiesUnaccretedPurchaseDiscount	30045000	USD
CY2020Q4	abcb	Trust Preferred Securities Net Of Discount TrustPreferredSecuritiesNetOfDiscount	124345000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	15510000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	46000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	22867000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	70000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-3084000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	71460000	USD
CY2020	abcb	Fees And Commissions Depositor Accounts1 FeesAndCommissionsDepositorAccounts1	44145000	USD
CY2019	abcb	Fees And Commissions Depositor Accounts1 FeesAndCommissionsDepositorAccounts1	50792000	USD
CY2018	abcb	Fees And Commissions Depositor Accounts1 FeesAndCommissionsDepositorAccounts1	46128000	USD
CY2020	abcb	Fees And Commissions Other1 FeesAndCommissionsOther1	3914000	USD
CY2019	abcb	Fees And Commissions Other1 FeesAndCommissionsOther1	3566000	USD
CY2018	abcb	Fees And Commissions Other1 FeesAndCommissionsOther1	2971000	USD
CY2020	us-gaap	Noninterest Income Other NoninterestIncomeOther	17133000	USD
CY2019	us-gaap	Noninterest Income Other NoninterestIncomeOther	18150000	USD
CY2018	us-gaap	Noninterest Income Other NoninterestIncomeOther	12968000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	73705000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5328000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1375000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-7881000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	19639000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	21994000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	27714000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	12479000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	496000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-47000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3182000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	878000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78256000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50143000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30463000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	7389000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1965000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3726000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	44433000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	31813000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	9812000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	2911000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	3095000	USD
CY2020	abcb	Income Tax Reconciliation Increase In Cash Value Of Bank Owned Life Insurance IncomeTaxReconciliationIncreaseInCashValueOfBankOwnedLifeInsurance	594000	USD
CY2019	abcb	Income Tax Reconciliation Increase In Cash Value Of Bank Owned Life Insurance IncomeTaxReconciliationIncreaseInCashValueOfBankOwnedLifeInsurance	581000	USD
CY2018	abcb	Income Tax Reconciliation Increase In Cash Value Of Bank Owned Life Insurance IncomeTaxReconciliationIncreaseInCashValueOfBankOwnedLifeInsurance	382000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	371000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-108000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	-602000	USD
CY2020	abcb	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger Expenses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerExpenses	2000	USD
CY2019	abcb	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger Expenses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerExpenses	799000	USD
CY2018	abcb	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger Expenses EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerExpenses	1002000	USD
CY2019	abcb	Effective Income Tax Rate Reconciliation Carryback Claims Resulting From The Cares Act Amount EffectiveIncomeTaxRateReconciliationCarrybackClaimsResultingFromTheCARESActAmount	0	USD
CY2018	abcb	Effective Income Tax Rate Reconciliation Carryback Claims Resulting From The Cares Act Amount EffectiveIncomeTaxRateReconciliationCarrybackClaimsResultingFromTheCARESActAmount	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	39000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	2827000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1122000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-238000	USD
CY2020	abcb	Effective Income Tax Rate Reconciliation Carryback Claims Resulting From The Cares Act Amount EffectiveIncomeTaxRateReconciliationCarrybackClaimsResultingFromTheCARESActAmount	-1896000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78256000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50143000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30463000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	59643000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	9596000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	5722000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	3459000	USD
CY2020Q4	abcb	Deferred Tax Assets Tax Deferred Expense Deferred Loan Fees DeferredTaxAssetsTaxDeferredExpenseDeferredLoanFees	5224000	USD
CY2019Q4	abcb	Deferred Tax Assets Tax Deferred Expense Deferred Loan Fees DeferredTaxAssetsTaxDeferredExpenseDeferredLoanFees	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	17176000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	18775000	USD
CY2020Q4	abcb	Deferred Tax Assets Nonaccrual Interest DeferredTaxAssetsNonaccrualInterest	0	USD
CY2019Q4	abcb	Deferred Tax Assets Nonaccrual Interest DeferredTaxAssetsNonaccrualInterest	107000	USD
CY2020Q4	abcb	Deferred Tax Assets Purchase Accounting Adjustments DeferredTaxAssetsPurchaseAccountingAdjustments	17266000	USD
CY2019Q4	abcb	Deferred Tax Assets Purchase Accounting Adjustments DeferredTaxAssetsPurchaseAccountingAdjustments	21104000	USD
CY2020Q4	abcb	Deferred Tax Assets Other Real Estate Owned DeferredTaxAssetsOtherRealEstateOwned	2647000	USD
CY2019Q4	abcb	Deferred Tax Assets Other Real Estate Owned DeferredTaxAssetsOtherRealEstateOwned	4556000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	931000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	3701000	USD
CY2020Q4	abcb	Deferred Tax Assets Fdic Assisted Transaction Adjustments DeferredTaxAssetsFDICAssistedTransactionAdjustments	0	USD
CY2019Q4	abcb	Deferred Tax Assets Fdic Assisted Transaction Adjustments DeferredTaxAssetsFDICAssistedTransactionAdjustments	2060000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2815000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4840000	USD
CY2020Q4	abcb	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	19314000	USD
CY2019Q4	abcb	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	10619000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	130738000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	35806000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	25990000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	6169000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	78856000	USD
CY2020Q4	abcb	Deferred Tax Liabilities Deferred Expense Depreciation And Amortization DeferredTaxLiabilitiesDeferredExpenseDepreciationAndAmortization	14337000	USD
CY2019Q4	abcb	Deferred Tax Liabilities Deferred Expense Depreciation And Amortization DeferredTaxLiabilitiesDeferredExpenseDepreciationAndAmortization	12211000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	7226000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	13165000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	15756000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	9263000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Unrealized Gains On Trading Securities DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities	5430000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	18684000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	10063000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	97424000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	76676000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	33314000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	2180000	USD
CY2020Q1	us-gaap	Discontinued Operation Provision For Loss Gain On Disposal Net Of Tax DiscontinuedOperationProvisionForLossGainOnDisposalNetOfTax	13200000	USD
CY2020	abcb	Effective Income Tax Rate Reconciliation Carryback Claims Resulting From The Cares Act Amount EffectiveIncomeTaxRateReconciliationCarrybackClaimsResultingFromTheCARESActAmount	-1900000	USD
CY2019	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2018	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2020	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	0	USD
CY2018Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2019Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2020Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	5900000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	4400000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2900000	USD
CY2020Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	722000	USD
CY2020Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	176500000	USD
CY2019Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	175300000	USD
CY2019Q4	us-gaap	Deferred Compensation Arrangement With Individual Recorded Liability DeferredCompensationArrangementWithIndividualRecordedLiability	698000	USD
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	830000	USD
CY2019	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	386000	USD
CY2018	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	739000	USD
CY2020Q4	us-gaap	Deferred Compensation Arrangement With Individual Shares Authorized For Issuance DeferredCompensationArrangementWithIndividualSharesAuthorizedForIssuance	1200000	shares
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Shares Issued DeferredCompensationArrangementWithIndividualSharesIssued	470502	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Stock Options EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions	0	USD
CY2020	abcb	Share Based Compensation Arrangement By Share Based Payment Award Options Amount Assumed From Acquisition During The Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAmountAssumedFromAcquisitionDuringThePeriod	576588	shares
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y1M6D
CY2019Q4	us-gaap	Interest Rate Cash Flow Hedge Liability At Fair Value InterestRateCashFlowHedgeLiabilityAtFairValue	187000	USD
CY2020Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	1001807000	USD
CY2019Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	1656711000	USD
CY2020	abcb	Net Gains Losses From Change In Fair Value Of Mortgages Loans Held For Sale NetGainsLossesFromChangeInFairValueOfMortgagesLoansHeldForSale	747000	USD
CY2019	abcb	Net Gains Losses From Change In Fair Value Of Mortgages Loans Held For Sale NetGainsLossesFromChangeInFairValueOfMortgagesLoansHeldForSale	37700000	USD
CY2018	abcb	Net Gains Losses From Change In Fair Value Of Mortgages Loans Held For Sale NetGainsLossesFromChangeInFairValueOfMortgagesLoansHeldForSale	4100000	USD
CY2020	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	32000000.0	USD
CY2019	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	-9300000	USD
CY2018	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments1 ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1	1800000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	16100000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	10000000.0	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	0	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	7900000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	73688000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	76837000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	81901000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	39321000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	42262000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	13164000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	10774000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	8629000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	7982000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	6661000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	34691000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	5064000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	76837000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y2M12D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y1M6D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0185
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0256
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	15976000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	9910000	USD
CY2020	abcb	Operating Lease Liability Reduction OperatingLeaseLiabilityReduction	14056000	USD
CY2019	abcb	Operating Lease Liability Reduction OperatingLeaseLiabilityReduction	10244000	USD
CY2020	abcb	Right Of Use Asset Obtained In Exchange For Operating Lease Liability Net Of Business Combinations RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityNetOfBusinessCombinations	54107000	USD
CY2019	abcb	Right Of Use Asset Obtained In Exchange For Operating Lease Liability Net Of Business Combinations RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityNetOfBusinessCombinations	5826000	USD
CY2019Q4	abcb	Commitments To Extend Credit CommitmentsToExtendCredit	2486949000	USD
CY2020Q4	abcb	Unused Home Equity Lines Of Credit UnusedHomeEquityLinesOfCredit	259015000	USD
CY2019Q4	abcb	Unused Home Equity Lines Of Credit UnusedHomeEquityLinesOfCredit	262089000	USD
CY2020Q4	abcb	Commitments To Extend Credit CommitmentsToExtendCredit	2826719000	USD
CY2020Q4	abcb	Letter Of Credit Maximum Issuance LetterOfCreditMaximumIssuance	33613000	USD
CY2019Q4	abcb	Letter Of Credit Maximum Issuance LetterOfCreditMaximumIssuance	29232000	USD
CY2020Q4	abcb	Mortgage Interest Rate Lock Commitments MortgageInterestRateLockCommitments	1199939000	USD
CY2019Q4	abcb	Mortgage Interest Rate Lock Commitments MortgageInterestRateLockCommitments	288490000	USD
CY2020Q4	us-gaap	Retained Earnings Unappropriated RetainedEarningsUnappropriated	142100000	USD
CY2020Q1	abcb	Finance Receivable Allowance For Credit Loss Transition Relief Period FinanceReceivableAllowanceForCreditLossTransitionReliefPeriod	P5Y
CY2020Q4	abcb	Percentage Of Capital Conservation Buffer For Capital Adequacy Purposes PercentageOfCapitalConservationBufferForCapitalAdequacyPurposes	0.0250
CY2019Q4	abcb	Percentage Of Capital Conservation Buffer For Capital Adequacy Purposes PercentageOfCapitalConservationBufferForCapitalAdequacyPurposes	0.0250
CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	726503000	USD
CY2020	us-gaap	Interest Expense InterestExpense	88750000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	637753000	USD
CY2020	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	145380000	USD
CY2020	us-gaap	Noninterest Income NoninterestIncome	446500000	USD
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	360278000	USD
CY2020	us-gaap	Occupancy Net OccupancyNet	52349000	USD
CY2020	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	46017000	USD
CY2020	us-gaap	Other Expenses OtherExpenses	139985000	USD
CY2020	us-gaap	Noninterest Expense NoninterestExpense	598629000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	340244000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78256000	USD
CY2019	us-gaap	Interest Expense InterestExpense	131228000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	505166000	USD
CY2018	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	413326000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	261988000	USD
CY2020Q4	us-gaap	Assets Assets	20438638000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	928005000	USD
CY2020Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	71974000	USD
CY2019	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	636394000	USD
CY2019	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	19758000	USD
CY2019	us-gaap	Noninterest Income NoninterestIncome	198113000	USD
CY2019	us-gaap	Labor And Related Expense LaborAndRelatedExpense	223938000	USD
CY2019	us-gaap	Occupancy Net OccupancyNet	40596000	USD
CY2019	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	38513000	USD
CY2019	us-gaap	Other Expenses OtherExpenses	168890000	USD
CY2019	us-gaap	Noninterest Expense NoninterestExpense	471937000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	211584000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	50143000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161441000	USD
CY2019Q4	us-gaap	Assets Assets	18242579000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	931637000	USD
CY2018	us-gaap	Other Expenses OtherExpenses	84999000	USD
CY2018	us-gaap	Noninterest Expense NoninterestExpense	293647000	USD
CY2019Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	91586000	USD
CY2018	us-gaap	Interest Expense InterestExpense	69934000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	343392000	USD
CY2018	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	16667000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	118412000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	149132000	USD
CY2018	us-gaap	Occupancy Net OccupancyNet	29131000	USD
CY2018	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	30385000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	151490000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30463000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	121027000	USD
CY2018Q4	us-gaap	Assets Assets	11443515000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	503434000	USD
CY2018Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	58689000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	261988000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	161441000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	121027000	USD
CY2020Q1	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	41000000.0	USD
CY2020Q2	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	88200000	USD
CY2020Q3	abcb	After Tax Merger And Conversation Charges AfterTaxMergerAndConversationCharges	65200000	USD
CY2020Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	178783000	USD
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	179934000	USD
CY2020Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	185018000	USD
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	182768000	USD
CY2020Q4	us-gaap	Interest Expense InterestExpense	15327000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	17396000	USD
CY2020Q2	us-gaap	Interest Expense InterestExpense	21204000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	34823000	USD
CY2020Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	163456000	USD
CY2020Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	162538000	USD
CY2020Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	163814000	USD
CY2020Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	147945000	USD
CY2020Q4	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	-1510000	USD
CY2020Q3	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	17682000	USD
CY2020Q2	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	88161000	USD
CY2020Q1	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	41047000	USD
CY2020Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	164966000	USD
CY2020Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	144856000	USD
CY2020Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	75653000	USD
CY2020Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	106898000	USD
CY2020Q4	us-gaap	Noninterest Income NoninterestIncome	112143000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	159018000	USD
CY2020Q2	us-gaap	Noninterest Income NoninterestIncome	120960000	USD
CY2020Q1	us-gaap	Noninterest Income NoninterestIncome	54379000	USD
CY2020Q4	abcb	Noninterest Expense Excluding Acquisition Related Costs NoninterestExpenseExcludingAcquisitionRelatedCosts	151116000	USD
CY2020Q3	abcb	Noninterest Expense Excluding Acquisition Related Costs NoninterestExpenseExcludingAcquisitionRelatedCosts	153736000	USD
CY2020Q2	abcb	Noninterest Expense Excluding Acquisition Related Costs NoninterestExpenseExcludingAcquisitionRelatedCosts	154873000	USD
CY2020Q1	abcb	Noninterest Expense Excluding Acquisition Related Costs NoninterestExpenseExcludingAcquisitionRelatedCosts	137513000	USD
CY2020Q4	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2020Q3	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	-44000	USD
CY2020Q2	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	895000	USD
CY2020Q1	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	540000	USD
CY2020Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	125993000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	150182000	USD
CY2020Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	40845000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23224000	USD
CY2020Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31708000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	34037000	USD
CY2020Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8609000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3902000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	94285000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	116145000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	32236000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	19322000	USD
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.36
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.68
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2019Q4	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	155351000	USD
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.36
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.67
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2020Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.15
CY2020Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.15
CY2020Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.15
CY2020Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.15
CY2019Q4	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	194076000	USD
CY2019Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	188361000	USD
CY2019Q2	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	129028000	USD
CY2019Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	124929000	USD
CY2019Q4	us-gaap	Interest Expense InterestExpense	38725000	USD
CY2019Q3	us-gaap	Interest Expense InterestExpense	39592000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	27377000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	25534000	USD
CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	148769000	USD
CY2019Q2	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	101651000	USD
CY2019Q1	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	99395000	USD
CY2019Q4	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	5693000	USD
CY2019Q3	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	5989000	USD
CY2019Q2	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	4668000	USD
CY2019Q1	abcb	Allowance For Credit Loss Expense Reversal AllowanceForCreditLossExpenseReversal	3408000	USD
CY2019Q4	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	149658000	USD
CY2019Q3	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	142780000	USD
CY2019Q2	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	96983000	USD
CY2019Q1	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	95987000	USD
CY2019Q4	us-gaap	Noninterest Income NoninterestIncome	55113000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	76993000	USD
CY2019Q2	us-gaap	Noninterest Income NoninterestIncome	35236000	USD
CY2019Q1	us-gaap	Noninterest Income NoninterestIncome	30771000	USD
CY2019Q4	abcb	Noninterest Expense Excluding Acquisition Related Costs NoninterestExpenseExcludingAcquisitionRelatedCosts	120149000	USD
CY2019Q1	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	2057000	USD
CY2019Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	82207000	USD
CY2019Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	27076000	USD
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	50968000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	51333000	USD
CY2019Q3	abcb	Noninterest Expense Excluding Acquisition Related Costs NoninterestExpenseExcludingAcquisitionRelatedCosts	127539000	USD
CY2019Q2	abcb	Noninterest Expense Excluding Acquisition Related Costs NoninterestExpenseExcludingAcquisitionRelatedCosts	77776000	USD
CY2019Q1	abcb	Noninterest Expense Excluding Acquisition Related Costs NoninterestExpenseExcludingAcquisitionRelatedCosts	73368000	USD
CY2019Q4	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	2415000	USD
CY2019Q3	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	65158000	USD
CY2019Q2	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	3475000	USD
CY2019Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20959000	USD
CY2019Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5692000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	12064000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11428000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	61248000	USD
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.82
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	136542000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	103035000	USD
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	21384000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	38904000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	39905000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.31
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2019Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.15
CY2019Q3	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.15
CY2019Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
CY2019Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
CY2020	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Life1 ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1	P3Y5M15D
CY2019	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Life1 ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageLife1	P3Y9M21D
CY2020	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of Other Than10 Or20 Percent Adverse Change In Prepayment Speed Percent SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOfOtherThan10Or20PercentAdverseChangeInPrepaymentSpeedPercent	0.1914
CY2019	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of Other Than10 Or20 Percent Adverse Change In Prepayment Speed Percent SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOfOtherThan10Or20PercentAdverseChangeInPrepaymentSpeedPercent	0.1786
CY2020	us-gaap	Amortization Of Mortgage Servicing Rights Ms Rs AmortizationOfMortgageServicingRightsMSRs	1640000	USD
CY2020Q4	us-gaap	Principal Amount Outstanding On Loans Managed And Securitized PrincipalAmountOutstandingOnLoansManagedAndSecuritized	351325000	USD
CY2019Q4	us-gaap	Principal Amount Outstanding On Loans Managed And Securitized PrincipalAmountOutstandingOnLoansManagedAndSecuritized	339247000	USD
CY2020Q4	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of10 Percent Adverse Change In Prepayment Speed SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed	335000	USD
CY2019Q4	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of10 Percent Adverse Change In Prepayment Speed SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPrepaymentSpeed	299000	USD
CY2020Q4	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of20 Percent Adverse Change In Prepayment Speed SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInPrepaymentSpeed	636000	USD
CY2019Q4	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of20 Percent Adverse Change In Prepayment Speed SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInPrepaymentSpeed	570000	USD
CY2020	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of Other Than10 Or20 Percent Adverse Change In Discount Rate Percent SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOfOtherThan10Or20PercentAdverseChangeInDiscountRatePercent	0.0955
CY2019	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of Other Than10 Or20 Percent Adverse Change In Discount Rate Percent SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOfOtherThan10Or20PercentAdverseChangeInDiscountRatePercent	0.1147
CY2020Q4	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of10 Percent Adverse Change In Discount Rate SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate	151000	USD
CY2019Q4	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of10 Percent Adverse Change In Discount Rate SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInDiscountRate	144000	USD
CY2020Q4	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of20 Percent Adverse Change In Discount Rate SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate	295000	USD
CY2019Q4	us-gaap	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Impact Of20 Percent Adverse Change In Discount Rate SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInDiscountRate	280000	USD

Files In Submission

Name	View Source	Status
0000351569-21-000004-index-headers.html	Edgar Link	pending
0000351569-21-000004-index.html	Edgar Link	pending
0000351569-21-000004.txt	Edgar Link	pending
0000351569-21-000004-xbrl.zip	Edgar Link	pending
abcb-20201231.htm	Edgar Link	pending
abcb-20201231.xsd	Edgar Link	pending
abcb-20201231_cal.xml	Edgar Link	unprocessable
abcb-20201231_def.xml	Edgar Link	unprocessable
abcb-20201231_g1.jpg	Edgar Link	pending
abcb-20201231_g2.jpg	Edgar Link	pending
abcb-20201231_g3.jpg	Edgar Link	pending
abcb-20201231_htm.xml	Edgar Link	completed
abcb-20201231_lab.xml	Edgar Link	unprocessable
abcb-20201231_pre.xml	Edgar Link	unprocessable
abcb12-31x2020ex211.htm	Edgar Link	pending
abcb12-31x2020ex231.htm	Edgar Link	pending
abcb12-31x2020ex311.htm	Edgar Link	pending
abcb12-31x2020ex312.htm	Edgar Link	pending
abcb12-31x2020ex321.htm	Edgar Link	pending
abcb12-31x2020ex322.htm	Edgar Link	pending
ex1015lahaiseserpplandocno.htm	Edgar Link	pending
ex457descriptionofregister.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R104.htm	Edgar Link	pending
R105.htm	Edgar Link	pending
R106.htm	Edgar Link	pending
R107.htm	Edgar Link	pending
R108.htm	Edgar Link	pending
R109.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R110.htm	Edgar Link	pending
R111.htm	Edgar Link	pending
R112.htm	Edgar Link	pending
R113.htm	Edgar Link	pending
R114.htm	Edgar Link	pending
R115.htm	Edgar Link	pending
R116.htm	Edgar Link	pending
R117.htm	Edgar Link	pending
R118.htm	Edgar Link	pending
R119.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R120.htm	Edgar Link	pending
R121.htm	Edgar Link	pending
R122.htm	Edgar Link	pending
R123.htm	Edgar Link	pending
R124.htm	Edgar Link	pending
R125.htm	Edgar Link	pending
R126.htm	Edgar Link	pending
R127.htm	Edgar Link	pending
R128.htm	Edgar Link	pending
R129.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R130.htm	Edgar Link	pending
R131.htm	Edgar Link	pending
R132.htm	Edgar Link	pending
R133.htm	Edgar Link	pending
R134.htm	Edgar Link	pending
R135.htm	Edgar Link	pending
R136.htm	Edgar Link	pending
R137.htm	Edgar Link	pending
R138.htm	Edgar Link	pending
R139.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
R9999.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$ABCB
Ameris Bancorp Stock $abcb

2020 Q4 Form 10-K Financial Statement

#000035156921000004 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ABCB Ameris Bancorp Stock $abcb

2020 Q4 Form 10-K Financial Statement

#000035156921000004 Filed on February 26, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ABCB
Ameris Bancorp Stock $abcb