$FBK
FB Financial Corp Stock $fbk

$fbk Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000164974924000063 Filed on February 27, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$176.1M		$678.4M
YoY Change	10.44%		40.92%
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	$2.841M	$4.659M	$11.18M
YoY Change	27.51%	57.88%	39.45%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$76.64M		$271.2M
YoY Change	37.29%		291.97%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$34.25M	$35.92M	$150.3M
YoY Change	-25.67%	-25.46%	-5.82%
Income Tax	$6.300M	$6.545M	$30.05M
% Of Pretax Income	18.39%	18.22%	20.0%
Net Earnings	$27.95M	$29.37M	$120.2M
YoY Change	-23.17%	-23.0%	-3.48%
Net Earnings / Revenue	15.87%		17.72%
Basic Earnings Per Share	$0.60		$2.57
Diluted Earnings Per Share	$0.59	$0.63	$2.57
COMMON SHARES
Basic Shares Outstanding	46.86M shares	46.84M shares	46.78M shares
Diluted Shares Outstanding	47.00M shares		46.82M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$870.7M	$810.9M
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	$206.7M	$210.0M	$210.0M
YoY Change	-1.79%	1.78%	1.78%
Goodwill	$242.6M	$242.6M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments		$0.00	$0.00
YoY Change		-100.0%	-100.0%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$12.55B	$12.60B	$12.60B
YoY Change	-4.22%	-1.89%	-1.89%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable			$18.81M
YoY Change			117.5%
Accrued Expenses	$203.0M	$210.3M	$210.3M
YoY Change	-14.12%	-16.14%	-16.14%
Deferred Revenue
YoY Change
Short-Term Debt	$133.2M	$238.8M	$238.8M
YoY Change	248.77%	174.61%	174.61%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$203.0M	$210.3M	$210.3M
YoY Change	-14.12%	-16.14%	-16.14%
LONG-TERM LIABILITIES
Long-Term Debt	$360.8M	$391.0M	$391.0M
YoY Change	15.6%	-5.95%	-5.95%
Other Long-Term Liabilities			$83.84M
YoY Change			-31.37%
Total Long-Term Liabilities	$360.8M	$391.0M	$391.0M
YoY Change	15.6%	-5.95%	-5.95%
TOTAL LIABILITIES
Total Short-Term Liabilities	$203.0M	$210.3M	$210.3M
Total Long-Term Liabilities	$360.8M	$391.0M	$391.0M
Total Liabilities	$11.07B	$11.15B	$11.15B
YoY Change	-5.65%	-3.23%	-3.23%
SHAREHOLDERS EQUITY
Retained Earnings	$698.3M	$678.4M
YoY Change	13.39%	15.66%
Common Stock	$913.7M	$911.1M
YoY Change	1.14%	0.31%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.480B	$1.455B	$1.455B
YoY Change
Total Liabilities & Shareholders Equity	$12.55B	$12.60B	$12.60B
YoY Change	-4.22%	-1.89%	-1.89%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$27.95M	$29.37M	$120.2M
YoY Change	-23.17%	-23.0%	-3.48%
Depreciation, Depletion And Amortization	$2.841M	$4.659M	$11.18M
YoY Change	27.51%	57.88%	39.45%
Cash From Operating Activities	$36.27M	$74.36M	$211.1M
YoY Change	-63.14%	62.83%	-73.26%
INVESTING ACTIVITIES
Capital Expenditures	$1.620M	$3.666M	$20.23M
YoY Change	-82.86%	-19.76%	90.32%
Acquisitions
YoY Change
Other Investing Activities	$111.8M	-$171.9M	-$34.99M
YoY Change	-1365.15%	6.6%	-97.98%
Cash From Investing Activities	$110.1M	-$175.5M	-$55.22M
YoY Change	-702.4%	5.87%	-96.83%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$86.61M	63.78M	-$372.0M
YoY Change	-140.7%	-87.94%	-302.05%
NET CHANGE
Cash From Operating Activities	$36.27M	74.36M	$211.1M
Cash From Investing Activities	$110.1M	-175.5M	-$55.22M
Cash From Financing Activities	-$86.61M	63.78M	-$372.0M
Net Change In Cash	$59.80M	-37.39M	-$216.1M
YoY Change	-79.58%	-109.15%	-71.96%
FREE CASH FLOW
Cash From Operating Activities	$36.27M	$74.36M	$211.1M
Capital Expenditures	$1.620M	$3.666M	$20.23M
Free Cash Flow	$34.65M	$70.69M	$190.8M
YoY Change	-61.04%	72.01%	-75.49%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	12374000	usd
CY2023	us-gaap	Interest Expense InterestExpense	271193000	usd
CY2022	us-gaap	Interest Expense InterestExpense	69187000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	412235000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	347370000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-38995000	usd
CY2023Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	287000	usd
CY2022Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	222000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	7300000	usd
CY2023	us-gaap	Contractually Specified Servicing Fee Income Statement Of Income Or Comprehensive Income Extensible Enumeration ContractuallySpecifiedServicingFeeIncomeStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#RevenueFromContractWithCustomerIncludingAssessedTax http://investors.firstbankonline.com/20231231#NoninterestExpenseOther
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	5794000	usd
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	9777000	usd
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	101000	usd
CY2022	fbk	Gain Loss On Modification And Termination Of Lease GainLossOnModificationAndTerminationOfLease	-346000	usd
CY2021	fbk	Gain Loss On Modification And Termination Of Lease GainLossOnModificationAndTerminationOfLease	805000	usd
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	24000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	28000	usd
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	25000	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	120000	usd
CY2023	fbk	Servicing Asset At Fair Value Changes In Fair Value Due To Pay Offs Or Pay Downs ServicingAssetAtFairValueChangesInFairValueDueToPayOffsOrPayDowns	-12327000	usd
CY2022	fbk	Servicing Asset At Fair Value Changes In Fair Value Due To Pay Offs Or Pay Downs ServicingAssetAtFairValueChangesInFairValueDueToPayOffsOrPayDowns	-16012000	usd
CY2023	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	1019000	usd
CY2022	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	48056000	usd
CY2021	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	27080000	usd
CY2023Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	164249000	usd
CY2021Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	115512000	usd
CY2021	us-gaap	Contractually Specified Servicing Fees Amount ContractuallySpecifiedServicingFeesAmount	28890000	usd
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001649749
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2023Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#DebtLongtermAndShorttermCombinedAmount
CY2022Q4	us-gaap	Finance Lease Liability Statement Of Financial Position Extensible List FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#DebtLongtermAndShorttermCombinedAmount
CY2022	us-gaap	Contractually Specified Servicing Fee Income Statement Of Income Or Comprehensive Income Extensible Enumeration ContractuallySpecifiedServicingFeeIncomeStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#RevenueFromContractWithCustomerIncludingAssessedTax http://investors.firstbankonline.com/20231231#NoninterestExpenseOther
CY2021	us-gaap	Contractually Specified Servicing Fee Income Statement Of Income Or Comprehensive Income Extensible Enumeration ContractuallySpecifiedServicingFeeIncomeStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#RevenueFromContractWithCustomerIncludingAssessedTax http://investors.firstbankonline.com/20231231#NoninterestExpenseOther
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-37875
CY2023	dei	Entity Registrant Name EntityRegistrantName	FB FINANCIAL CORPORATION
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	TN
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	62-1216058
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	1221 Broadway
CY2023	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 1300
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Nashville
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	TN
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	37203
CY2023	dei	City Area Code CityAreaCode	615
CY2023	dei	Local Phone Number LocalPhoneNumber	564-1212
CY2023	dei	Security12b Title Security12bTitle	Common Stock, Par Value $1.00 Per Share
CY2023	dei	Trading Symbol TradingSymbol	FBK
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	987421710	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	46858267	shares
CY2023	dei	Auditor Firm AuditorFirmId	173
CY2023	dei	Auditor Name AuditorName	Crowe LLP
CY2023	dei	Auditor Location AuditorLocation	Franklin, Tennessee
CY2023Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	146542000	usd
CY2022Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	259872000	usd
CY2023Q4	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	83324000	usd
CY2022Q4	us-gaap	Federal Funds Sold And Securities Purchased Under Agreements To Resell FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell	210536000	usd
CY2023Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	581066000	usd
CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	556644000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	810932000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1027052000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1471973000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1471186000	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	0	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2990000	usd
CY2023Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	34190000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	58641000	usd
CY2023Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	67847000	usd
CY2022Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	139451000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	9408783000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	9298212000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	150326000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	134192000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	9258457000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	9164020000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	155731000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	146316000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	54295000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	60043000	usd
CY2023Q4	us-gaap	Interest Receivable InterestReceivable	52715000	usd
CY2022Q4	us-gaap	Interest Receivable InterestReceivable	45684000	usd
CY2023Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	164249000	usd
CY2022Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	168365000	usd
CY2023Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	76143000	usd
CY2022Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	75329000	usd
CY2023Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	3192000	usd
CY2022Q4	us-gaap	Other Real Estate And Foreclosed Assets OtherRealEstateAndForeclosedAssets	5794000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	242561000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	242561000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8709000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	12368000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	203409000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	227956000	usd
CY2023Q4	us-gaap	Assets Assets	12604403000	usd
CY2022Q4	us-gaap	Assets Assets	12847756000	usd
CY2023Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	2218382000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	2676631000	usd
CY2023Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	2504421000	usd
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	3059984000	usd
CY2023Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	4204851000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	3697245000	usd
CY2023Q4	fbk	Customer Time Deposits CustomerTimeDeposits	1469811000	usd
CY2022Q4	fbk	Customer Time Deposits CustomerTimeDeposits	1420131000	usd
CY2023Q4	fbk	Brokered And Internet Time Deposits BrokeredAndInternetTimeDeposits	150822000	usd
CY2022Q4	fbk	Brokered And Internet Time Deposits BrokeredAndInternetTimeDeposits	1843000	usd
CY2023Q4	us-gaap	Deposits Deposits	10548287000	usd
CY2022Q4	us-gaap	Deposits Deposits	10855834000	usd
CY2023Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	390964000	usd
CY2022Q4	us-gaap	Debt Longterm And Shortterm Combined Amount DebtLongtermAndShorttermCombinedAmount	415677000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	67643000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	69754000	usd
CY2023Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	142622000	usd
CY2022Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	180973000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	11149516000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	11522238000	usd
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	75000000	shares
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	75000000	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	46848934	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	46848934	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	46737912	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	46737912	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	46849000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	46738000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	864258000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	861588000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	678412000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	586532000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-134725000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-169433000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1454794000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1325425000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	93000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	93000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1454887000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1325518000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12604403000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	12847756000	usd
CY2023	fbk	Interest And Fee Income Loans InterestAndFeeIncomeLoans	599195000	usd
CY2022	fbk	Interest And Fee Income Loans InterestAndFeeIncomeLoans	436363000	usd
CY2021	fbk	Interest And Fee Income Loans InterestAndFeeIncomeLoans	359262000	usd
CY2023	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	27257000	usd
CY2022	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	25469000	usd
CY2021	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	15186000	usd
CY2023	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	7153000	usd
CY2022	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	7332000	usd
CY2021	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	7657000	usd
CY2023	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	44805000	usd
CY2022	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	12258000	usd
CY2021	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	2893000	usd
CY2023	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	678410000	usd
CY2022	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	481422000	usd
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	384998000	usd
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	258819000	usd
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	56642000	usd
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	30189000	usd
CY2022	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	12545000	usd
CY2021	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	7439000	usd
CY2021	us-gaap	Interest Expense InterestExpense	37628000	usd
CY2023	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-13973000	usd
CY2022	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-376000	usd
CY2021	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	324000	usd
CY2023	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-27000	usd
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-265000	usd
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	2827000	usd
CY2023	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	6095000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	5213000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	19047000	usd
CY2023	us-gaap	Noninterest Income NoninterestIncome	70543000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	114667000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	228255000	usd
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	203441000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	211491000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	248318000	usd
CY2023	us-gaap	Occupancy Net OccupancyNet	28148000	usd
CY2022	us-gaap	Occupancy Net OccupancyNet	23562000	usd
CY2021	us-gaap	Occupancy Net OccupancyNet	22733000	usd
CY2023	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	9230000	usd
CY2022	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	9315000	usd
CY2021	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	9987000	usd
CY2023	fbk	Legal And Professional Fees LegalAndProfessionalFees	8890000	usd
CY2022	fbk	Legal And Professional Fees LegalAndProfessionalFees	15028000	usd
CY2021	fbk	Legal And Professional Fees LegalAndProfessionalFees	9161000	usd
CY2023	us-gaap	Advertising Expense AdvertisingExpense	8267000	usd
CY2022	us-gaap	Advertising Expense AdvertisingExpense	11208000	usd
CY2021	us-gaap	Advertising Expense AdvertisingExpense	13921000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3659000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4585000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5473000	usd
CY2023	fbk	Mortgage Restructuring Expense MortgageRestructuringExpense	0	usd
CY2022	fbk	Mortgage Restructuring Expense MortgageRestructuringExpense	12458000	usd
CY2021	fbk	Mortgage Restructuring Expense MortgageRestructuringExpense	0	usd
CY2023	fbk	Noninterest Expense Other NoninterestExpenseOther	63294000	usd
CY2022	fbk	Noninterest Expense Other NoninterestExpenseOther	60699000	usd
CY2021	fbk	Noninterest Expense Other NoninterestExpenseOther	63974000	usd
CY2023	us-gaap	Noninterest Expense NoninterestExpense	324929000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	348346000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	373567000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	150292000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	159574000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	243051000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30052000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35003000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52750000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	120240000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	124571000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	190301000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	16000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	16000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	16000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	120224000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	124555000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	190285000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.57
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.64
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.01
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.57
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.64
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.97
CY2023	us-gaap	Profit Loss ProfitLoss	120240000	usd
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	8706000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-62316000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-7224000	usd
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	24802000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-176798000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-22475000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	3668000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-33000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-10406000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	93000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-176000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	532000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	293000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-500000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	1508000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	831000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	34708000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-175291000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-21737000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	154948000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-50720000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	168564000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	16000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	16000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	16000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	154932000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-50736000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	168548000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1291382000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	190301000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-21737000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	7595000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	10282000	usd
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1480000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.44
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	21244000	usd
CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	16000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1432695000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	124571000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-175291000	usd
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	39979000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9857000	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1212000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	24689000	usd
CY2022	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	16000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1325518000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	120240000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	34708000	usd
CY2023	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	4944000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	10381000	usd
CY2023	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	723000	usd
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2023	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	28344000	usd
CY2023	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	16000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1454887000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	124571000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	190301000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11180000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	8017000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	8416000	usd
CY2023	fbk	Amortization Of Other Intangible Assets AmortizationOfOtherIntangibleAssets	3659000	usd
CY2022	fbk	Amortization Of Other Intangible Assets AmortizationOfOtherIntangibleAssets	4585000	usd
CY2021	fbk	Amortization Of Other Intangible Assets AmortizationOfOtherIntangibleAssets	5473000	usd
CY2023	fbk	Amortization Of Debt Issuance Costs And Accretion Of Premiums AmortizationOfDebtIssuanceCostsAndAccretionOfPremiums	387000	usd
CY2022	fbk	Amortization Of Debt Issuance Costs And Accretion Of Premiums AmortizationOfDebtIssuanceCostsAndAccretionOfPremiums	387000	usd
CY2021	fbk	Amortization Of Debt Issuance Costs And Accretion Of Premiums AmortizationOfDebtIssuanceCostsAndAccretionOfPremiums	17000	usd
CY2023	fbk	Capitalization Of Mortgage Servicing Rights Ms Rs CapitalizationOfMortgageServicingRightsMSRs	7192000	usd
CY2022	fbk	Capitalization Of Mortgage Servicing Rights Ms Rs CapitalizationOfMortgageServicingRightsMSRs	20809000	usd
CY2021	fbk	Capitalization Of Mortgage Servicing Rights Ms Rs CapitalizationOfMortgageServicingRightsMSRs	39018000	usd
CY2023	fbk	Change In Fair Value Of Mortgage Servicing Rights ChangeInFairValueOfMortgageServicingRights	11308000	usd
CY2022	fbk	Change In Fair Value Of Mortgage Servicing Rights ChangeInFairValueOfMortgageServicingRights	-32044000	usd
CY2021	fbk	Change In Fair Value Of Mortgage Servicing Rights ChangeInFairValueOfMortgageServicingRights	3503000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	10381000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	9857000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	10282000	usd
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	16738000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	10393000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-38995000	usd
CY2023	fbk	Unfunded Commitments Credit Loss Expense Reversal UnfundedCommitmentsCreditLossExpenseReversal	-14199000	usd
CY2022	fbk	Unfunded Commitments Credit Loss Expense Reversal UnfundedCommitmentsCreditLossExpenseReversal	8589000	usd
CY2021	fbk	Unfunded Commitments Credit Loss Expense Reversal UnfundedCommitmentsCreditLossExpenseReversal	-1998000	usd
CY2023	fbk	Provision For Mortgage Loan Repurchases Or Indemnifications ProvisionForMortgageLoanRepurchasesOrIndemnifications	650000	usd
CY2022	fbk	Provision For Mortgage Loan Repurchases Or Indemnifications ProvisionForMortgageLoanRepurchasesOrIndemnifications	2989000	usd
CY2021	fbk	Provision For Mortgage Loan Repurchases Or Indemnifications ProvisionForMortgageLoanRepurchasesOrIndemnifications	766000	usd
CY2023	fbk	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Amortization CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionAmortization	694000	usd
CY2022	fbk	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Amortization CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionAmortization	-1020000	usd
CY2021	fbk	Certain Loans Acquired In Transfer Not Accounted For As Debt Securities Accretable Yield Accretion Amortization CertainLoansAcquiredInTransferNotAccountedForAsDebtSecuritiesAccretableYieldAccretionAmortization	-853000	usd
CY2023	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-6106000	usd
CY2022	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-6589000	usd
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-8777000	usd
CY2023	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-13973000	usd
CY2022	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-376000	usd
CY2021	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	324000	usd
CY2023	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1199362000	usd
CY2022	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	2403476000	usd
CY2021	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	6300892000	usd
CY2023	us-gaap	Payments To Purchase Loans Held For Sale PaymentsToPurchaseLoansHeldForSale	0	usd
CY2022	us-gaap	Payments To Purchase Loans Held For Sale PaymentsToPurchaseLoansHeldForSale	194000	usd
CY2021	us-gaap	Payments To Purchase Loans Held For Sale PaymentsToPurchaseLoansHeldForSale	487000	usd
CY2023	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	1276596000	usd
CY2022	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	3067204000	usd
CY2021	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	6387110000	usd
CY2023	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	28541000	usd
CY2022	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	47783000	usd
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	161964000	usd
CY2023	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-27000	usd
CY2022	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	-265000	usd
CY2021	us-gaap	Gains Losses On Sales Of Other Real Estate GainsLossesOnSalesOfOtherRealEstate	2827000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1415000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12552000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	30770000	usd
CY2023	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1871000	usd
CY2022	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1452000	usd
CY2021	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	1542000	usd
CY2023	fbk	Increase Decrease In Operating Leases IncreaseDecreaseInOperatingLeases	3637000	usd
CY2022	fbk	Increase Decrease In Operating Leases IncreaseDecreaseInOperatingLeases	5030000	usd
CY2021	fbk	Increase Decrease In Operating Leases IncreaseDecreaseInOperatingLeases	-969000	usd
CY2021	fbk	Increase Decrease In Operating Leases IncreaseDecreaseInOperatingLeases	-969000	usd
CY2023	fbk	Increase Decrease In Other Assets And Interest Receivable IncreaseDecreaseInOtherAssetsAndInterestReceivable	6564000	usd
CY2022	fbk	Increase Decrease In Other Assets And Interest Receivable IncreaseDecreaseInOtherAssetsAndInterestReceivable	-17222000	usd
CY2021	fbk	Increase Decrease In Other Assets And Interest Receivable IncreaseDecreaseInOtherAssetsAndInterestReceivable	59283000	usd
CY2023	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-15800000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	56247000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-100108000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	211072000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	789713000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	54895000	usd
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	100463000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1218000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	8855000	usd
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	128206000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	204748000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	296256000	usd
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	202054000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	242889000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	847212000	usd
CY2023	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	3091000	usd
CY2022	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	0	usd
CY2021	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	0	usd
CY2023	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	97302000	usd
CY2022	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	1675976000	usd
CY2021	us-gaap	Payments For Proceeds From Loans And Leases PaymentsForProceedsFromLoansAndLeases	309766000	usd
CY2023	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	32444000	usd
CY2022	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	usd
CY2021	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	4294000	usd
CY2023	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	7993000	usd
CY2022	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	26424000	usd
CY2021	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	5279000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	20229000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	10629000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6102000	usd
CY2023	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	123000	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	875000	usd
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	usd
CY2022	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	4959000	usd
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	9396000	usd
CY2023	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	6083000	usd
CY2023	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	1717000	usd
CY2022	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	0	usd
CY2021	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	0	usd
CY2023	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	236000	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-55215000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1744118000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-849558000	usd
CY2023	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	-312897000	usd
CY2022	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	28784000	usd
CY2021	us-gaap	Increase Decrease In Demand Deposits IncreaseDecreaseInDemandDeposits	1378860000	usd
CY2023	fbk	Increase Decrease In Securities Sold Under Agreements To Repurchase And Federal Funds Purchased IncreaseDecreaseInSecuritiesSoldUnderAgreementsToRepurchaseAndFederalFundsPurchased	21819000	usd
CY2022	fbk	Increase Decrease In Securities Sold Under Agreements To Repurchase And Federal Funds Purchased IncreaseDecreaseInSecuritiesSoldUnderAgreementsToRepurchaseAndFederalFundsPurchased	46229000	usd
CY2021	fbk	Increase Decrease In Securities Sold Under Agreements To Repurchase And Federal Funds Purchased IncreaseDecreaseInSecuritiesSoldUnderAgreementsToRepurchaseAndFederalFundsPurchased	8517000	usd
CY2023	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	45000000	usd
CY2022	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	175000000	usd
CY2021	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	0	usd
CY2023	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	usd
CY2022	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	usd
CY2021	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	60000000	usd
CY2023	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	usd
CY2022	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	usd
CY2021	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	15000000	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3379000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2842000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	10158000	usd
CY2023	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	723000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1212000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1480000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4944000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	39979000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7595000	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	28057000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	24503000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20866000	usd
CY2023	fbk	Payments Made Upon Vesting Of Dividend Equivalent Units PaymentsMadeUponVestingOfDividendEquivalentUnits	226000	usd
CY2022	fbk	Payments Made Upon Vesting Of Dividend Equivalent Units PaymentsMadeUponVestingOfDividendEquivalentUnits	168000	usd
CY2021	fbk	Payments Made Upon Vesting Of Dividend Equivalent Units PaymentsMadeUponVestingOfDividendEquivalentUnits	717000	usd
CY2023	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	16000	usd
CY2022	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	16000	usd
CY2021	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	16000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-371977000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	183717000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1274505000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-216120000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-770688000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	479842000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1027052000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1797740000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1317898000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	810932000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1027052000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1797740000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	261032000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	63701000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	41238000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	37937000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	906000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	61693000	usd
CY2023	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	2736000	usd
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1437000	usd
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	5262000	usd
CY2023	fbk	Noncash Transaction Transfer To Other Assets NoncashTransactionTransferToOtherAssets	2925000	usd
CY2022	fbk	Noncash Transaction Transfer To Other Assets NoncashTransactionTransferToOtherAssets	0	usd
CY2021	fbk	Noncash Transaction Transfer To Other Assets NoncashTransactionTransferToOtherAssets	0	usd
CY2023	fbk	Transfers From Other Real Estate Owned To Other Assets TransfersFromOtherRealEstateOwnedToOtherAssets	75000	usd
CY2022	fbk	Transfers From Other Real Estate Owned To Other Assets TransfersFromOtherRealEstateOwnedToOtherAssets	0	usd
CY2021	fbk	Transfers From Other Real Estate Owned To Other Assets TransfersFromOtherRealEstateOwnedToOtherAssets	0	usd
CY2023	fbk	Other Real Estate Owned Transfer To Other Real Estate Owned OtherRealEstateOwnedTransferToOtherRealEstateOwned	0	usd
CY2022	fbk	Other Real Estate Owned Transfer To Other Real Estate Owned OtherRealEstateOwnedTransferToOtherRealEstateOwned	351000	usd
CY2021	fbk	Other Real Estate Owned Transfer To Other Real Estate Owned OtherRealEstateOwnedTransferToOtherRealEstateOwned	0	usd
CY2023	fbk	Noncash Transaction Loans Provided For Sales Of Other Real Estate Owned NoncashTransactionLoansProvidedForSalesOfOtherRealEstateOwned	0	usd
CY2022	fbk	Noncash Transaction Loans Provided For Sales Of Other Real Estate Owned NoncashTransactionLoansProvidedForSalesOfOtherRealEstateOwned	0	usd
CY2021	fbk	Noncash Transaction Loans Provided For Sales Of Other Real Estate Owned NoncashTransactionLoansProvidedForSalesOfOtherRealEstateOwned	704000	usd
CY2023	fbk	Noncash Transaction Loans Provided For Sales Of Other Assets NoncashTransactionLoansProvidedForSalesOfOtherAssets	911000	usd
CY2022	fbk	Noncash Transaction Loans Provided For Sales Of Other Assets NoncashTransactionLoansProvidedForSalesOfOtherAssets	0	usd
CY2021	fbk	Noncash Transaction Loans Provided For Sales Of Other Assets NoncashTransactionLoansProvidedForSalesOfOtherAssets	0	usd
CY2023	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	13720000	usd
CY2021	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	86315000	usd
CY2023	fbk	Increase Decrease In Loans Assumed Net IncreaseDecreaseInLoansAssumedNet	-4982000	usd
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	400000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	25399000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	970000	usd
CY2023Q4	fbk	Number Of Full Service Branches NumberOfFullServiceBranches	81	branch
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2023	fbk	Percent Of Principal Balance Allowed To Buy Back Under Government National Mortgage Association Optional Repurchase Programs PercentOfPrincipalBalanceAllowedToBuyBackUnderGovernmentNationalMortgageAssociationOptionalRepurchasePrograms	1
CY2023	fbk	Number Of Loan Portfolio Pools NumberOfLoanPortfolioPools	3	loanportfoliopool
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2023	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2021	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted	190285000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46781214	shares
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	47113470	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	47431102	shares
CY2023	us-gaap	Weighted Average Number Of Shares Contingently Issuable WeightedAverageNumberOfSharesContingentlyIssuable	41578	shares
CY2022	us-gaap	Weighted Average Number Of Shares Contingently Issuable WeightedAverageNumberOfSharesContingentlyIssuable	126321	shares
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	120224000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	124555000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	190285000	usd
CY2023	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	usd
CY2022	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	usd
CY2021	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	0	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	120224000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	124555000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	190285000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	46781214	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	47113470	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	47431102	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.57
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.64
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.01
CY2023	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted	120224000	usd
CY2022	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted	124555000	usd
CY2021	us-gaap	Weighted Average Number Of Shares Contingently Issuable WeightedAverageNumberOfSharesContingentlyIssuable	524778	shares
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	646226000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	67665000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	793685000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	167181000	usd
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46822792	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47239791	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	47955880	shares
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.57
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.64
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.97
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1658779000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	840000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	187646000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1471973000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1705574000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	458000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	234846000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1471186000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	40403000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	169000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	1228463000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	187477000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1268866000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	187646000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	204748000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1439911000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	234846000	usd
CY2023Q4	fbk	Number Of Available For Sale Securities In Portfolio NumberOfAvailableForSaleSecuritiesInPortfolio	439	security
CY2022Q4	fbk	Number Of Available For Sale Securities In Portfolio NumberOfAvailableForSaleSecuritiesInPortfolio	503	security
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	370	security
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	454	security
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	64776000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	64279000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	4277000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	4225000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	75996000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	71801000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	161556000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	152181000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	51162000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	49630000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	61290000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	57859000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	391270000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	372331000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	234720000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	205084000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	583204000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	558041000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	461843000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	419349000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1658779000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1471973000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1705574000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1471186000	usd
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	100463000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1218000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	8855000	usd
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	128206000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	296256000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	45000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	4000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	127000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	14119000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	3000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	1000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2990000	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	0	usd
CY2023Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	25191000	usd
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	22496000	usd
CY2023Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	34190000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	58641000	usd
CY2023	fbk	Equity Securities Fvni And Sale Gain Loss EquitySecuritiesFVNIAndSaleGainLoss	101000	usd
CY2022	fbk	Equity Securities Fvni And Sale Gain Loss EquitySecuritiesFVNIAndSaleGainLoss	-377000	usd
CY2021	fbk	Equity Securities Fvni And Sale Gain Loss EquitySecuritiesFVNIAndSaleGainLoss	198000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	9408783000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	9298212000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	150326000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	134192000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	9258457000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	9164020000	usd
CY2023Q4	us-gaap	Financing Receivable Accrued Interest Before Allowance For Credit Loss FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss	43776000	usd
CY2022Q4	us-gaap	Financing Receivable Accrued Interest Before Allowance For Credit Loss FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss	38507000	usd
CY2023Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	12693000	usd
CY2023Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	48230000	usd
CY2023Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	9408783000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	18415000	usd
CY2022Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	27431000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	9298212000	usd
CY2023Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	14310000	usd
CY2023Q4	fbk	Financing Receivable Nonaccrual Related Allowance FinancingReceivableNonaccrualRelatedAllowance	33920000	usd
CY2023Q4	fbk	Financing Receivable Allowance For Credit Losses Nonaccrual FinancingReceivableAllowanceForCreditLossesNonaccrual	5696000	usd
CY2023	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	6128000	usd
CY2022Q4	us-gaap	Financing Receivable Nonaccrual No Allowance FinancingReceivableNonaccrualNoAllowance	15714000	usd
CY2022Q4	fbk	Financing Receivable Nonaccrual Related Allowance FinancingReceivableNonaccrualRelatedAllowance	11717000	usd
CY2022Q4	fbk	Financing Receivable Allowance For Credit Losses Nonaccrual FinancingReceivableAllowanceForCreditLossesNonaccrual	433000	usd
CY2022	us-gaap	Financing Receivable Nonaccrual Interest Income FinancingReceivableNonaccrualInterestIncome	1544000	usd
CY2023	us-gaap	Financing Receivable Accrued Interest Writeoff FinancingReceivableAccruedInterestWriteoff	1094000	usd
CY2022	us-gaap	Financing Receivable Accrued Interest Writeoff FinancingReceivableAccruedInterestWriteoff	1089000	usd
CY2021	us-gaap	Financing Receivable Accrued Interest Writeoff FinancingReceivableAccruedInterestWriteoff	804000	usd
CY2022	fbk	Financing Receivable Modifications Number Of Contracts3 FinancingReceivableModificationsNumberOfContracts3	9	loan
CY2022	fbk	Financing Receivable Troubled Debt Restructuring Premodification3 FinancingReceivableTroubledDebtRestructuringPremodification3	1075000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	1301000	usd
CY2022	fbk	Financing Receivable Modifications Charge Offs And Specific Reserves FinancingReceivableModificationsChargeOffsAndSpecificReserves	0	usd
CY2021	fbk	Financing Receivable Modifications Number Of Contracts3 FinancingReceivableModificationsNumberOfContracts3	23	loan
CY2021	fbk	Financing Receivable Troubled Debt Restructuring Premodification3 FinancingReceivableTroubledDebtRestructuringPremodification3	34115000	usd
CY2021	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	34115000	usd
CY2021	fbk	Financing Receivable Modifications Charge Offs And Specific Reserves FinancingReceivableModificationsChargeOffsAndSpecificReserves	446000	usd
CY2022	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	304000	usd
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	304000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	134192000	usd
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	16738000	usd
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2899000	usd
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	3503000	usd
CY2023Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	150326000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	125559000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	10393000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2941000	usd
CY2022	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	4701000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	134192000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	170389000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-38995000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2033000	usd
CY2021	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	7868000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	125559000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	1256000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	1367000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	207388000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	222063000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	51657000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	75747000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	155731000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	146316000	usd
CY2023	fbk	Depreciation And Finance Lease Right Of Use Asset Amortization DepreciationAndFinanceLeaseRightOfUseAssetAmortization	9797000	usd
CY2022	fbk	Depreciation And Finance Lease Right Of Use Asset Amortization DepreciationAndFinanceLeaseRightOfUseAssetAmortization	7554000	usd
CY2021	fbk	Depreciation And Finance Lease Right Of Use Asset Amortization DepreciationAndFinanceLeaseRightOfUseAssetAmortization	7411000	usd
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	5794000	usd
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	9777000	usd
CY2020Q4	us-gaap	Foreclosed Assets ForeclosedAssets	12111000	usd
CY2023	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	2736000	usd
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1437000	usd
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	5262000	usd
CY2023	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	75000	usd
CY2022	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	0	usd
CY2021	us-gaap	Transfer Of Other Real Estate TransferOfOtherRealEstate	0	usd
CY2023	fbk	Property Plant And Equipment Transfers To And From PropertyPlantAndEquipmentTransfersToAndFrom	0	usd
CY2022	fbk	Property Plant And Equipment Transfers To And From PropertyPlantAndEquipmentTransfersToAndFrom	351000	usd
CY2021	fbk	Property Plant And Equipment Transfers To And From PropertyPlantAndEquipmentTransfersToAndFrom	0	usd
CY2023	fbk	Proceeds From Sale Of Other Real Estate Owned ProceedsFromSaleOfOtherRealEstateOwned	6083000	usd
CY2022	fbk	Proceeds From Sale Of Other Real Estate Owned ProceedsFromSaleOfOtherRealEstateOwned	4955000	usd
CY2021	fbk	Proceeds From Sale Of Other Real Estate Owned ProceedsFromSaleOfOtherRealEstateOwned	9396000	usd
CY2023	fbk	Gain Loss On Sale Of Foreclosed Real Estate Assets. GainLossOnSaleOfForeclosedRealEstateAssets.	835000	usd
CY2022	fbk	Gain Loss On Sale Of Foreclosed Real Estate Assets. GainLossOnSaleOfForeclosedRealEstateAssets.	328000	usd
CY2021	fbk	Gain Loss On Sale Of Foreclosed Real Estate Assets. GainLossOnSaleOfForeclosedRealEstateAssets.	3248000	usd
CY2023	fbk	Noncash Transaction Loans Provided For Sales Of Other Real Estate Owned NoncashTransactionLoansProvidedForSalesOfOtherRealEstateOwned	0	usd
CY2022	fbk	Noncash Transaction Loans Provided For Sales Of Other Real Estate Owned NoncashTransactionLoansProvidedForSalesOfOtherRealEstateOwned	0	usd
CY2021	fbk	Noncash Transaction Loans Provided For Sales Of Other Real Estate Owned NoncashTransactionLoansProvidedForSalesOfOtherRealEstateOwned	704000	usd
CY2023	fbk	Foreclosed Real Estate Expense Write Downs And Liquidations ForeclosedRealEstateExpenseWriteDownsAndLiquidations	15000	usd
CY2022	fbk	Foreclosed Real Estate Expense Write Downs And Liquidations ForeclosedRealEstateExpenseWriteDownsAndLiquidations	442000	usd
CY2021	fbk	Foreclosed Real Estate Expense Write Downs And Liquidations ForeclosedRealEstateExpenseWriteDownsAndLiquidations	744000	usd
CY2023Q4	us-gaap	Foreclosed Assets ForeclosedAssets	3192000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	242561000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	242561000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	61435000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	52726000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8709000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	61435000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	49067000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	12368000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3659000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4585000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5473000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	2946000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	2306000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1563000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1080000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	572000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	242000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8709000	usd
CY2023Q4	fbk	Lessee Number Of Operating Leases LesseeNumberOfOperatingLeases	54	lease
CY2023Q4	fbk	Lessee Number Of Finance Leases LesseeNumberOfFinanceLeases	1	lease
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	54295000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	60043000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	1256000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	1367000	usd
CY2023Q4	fbk	Right Of Use Asset RightOfUseAsset	55551000	usd
CY2022Q4	fbk	Right Of Use Asset RightOfUseAsset	61410000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	67643000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	69754000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1326000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1420000	usd
CY2023Q4	fbk	Lease Liability LeaseLiability	68969000	usd
CY2022Q4	fbk	Lease Liability LeaseLiability	71174000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y7M6D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P12Y1M6D
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P11Y4M24D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P12Y4M24D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0339
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0308
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0176
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0176
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	8516000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	8441000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	7636000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	540000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	526000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	427000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	1205000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	1078000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	1003000	usd
CY2023	fbk	Gain Loss On Modification And Termination Of Lease GainLossOnModificationAndTerminationOfLease	-1770000	usd
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	111000	usd
CY2023	us-gaap	Sublease Income SubleaseIncome	957000	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	993000	usd
CY2021	us-gaap	Sublease Income SubleaseIncome	573000	usd
CY2023	us-gaap	Lease Cost LeaseCost	11209000	usd
CY2022	us-gaap	Lease Cost LeaseCost	9546000	usd
CY2021	us-gaap	Lease Cost LeaseCost	7814000	usd
CY2022	fbk	Loss On Modification And Termination Of Lease LossOnModificationAndTerminationOfLease	364000	usd
CY2022	fbk	Gain On Modification And Termination Of Lease GainOnModificationAndTerminationOfLease	18000	usd
CY2023	fbk	Gain Loss On Modification And Termination Of Lease GainLossOnModificationAndTerminationOfLease	-1770000	usd
CY2023	fbk	Number Of Branch Closures NumberOfBranchClosures	2	branch
CY2022	fbk	Loss On Modification And Termination Of Lease LossOnModificationAndTerminationOfLease	364000	usd
CY2022	fbk	Number Of Locations Vacated NumberOfLocationsVacated	2	banking_location
CY2022	fbk	Gain On Modification And Termination Of Lease GainOnModificationAndTerminationOfLease	18000	usd
CY2021	fbk	Gain Loss On Modification And Termination Of Lease GainLossOnModificationAndTerminationOfLease	805000	usd
CY2022	fbk	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Coupon Interest Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageCouponInterestRate	0.0331
CY2023	fbk	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Servicing Fee ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageServicingFee	0.0027
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Rolling Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths	8453000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due In Next Rolling Twelve Months FinanceLeaseLiabilityPaymentsDueInNextRollingTwelveMonths	120000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Two LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearTwo	8448000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Two FinanceLeaseLiabilityPaymentsDueInRollingYearTwo	121000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Three LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearThree	8328000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Three FinanceLeaseLiabilityPaymentsDueInRollingYearThree	123000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Four LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFour	7878000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Four FinanceLeaseLiabilityPaymentsDueInRollingYearFour	125000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due In Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueInRollingYearFive	6979000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due In Rolling Year Five FinanceLeaseLiabilityPaymentsDueInRollingYearFive	127000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Rolling Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterRollingYearFive	44147000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due In Rolling After Year Five FinanceLeaseLiabilityPaymentsDueInRollingAfterYearFive	850000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	84233000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	1466000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	16590000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	140000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	67643000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1326000	usd
CY2022Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	168365000	usd
CY2021Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	115512000	usd
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	79997000	usd
CY2023	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	7192000	usd
CY2022	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	20809000	usd
CY2021	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	39018000	usd
CY2021	fbk	Servicing Asset At Fair Value Changes In Fair Value Due To Pay Offs Or Pay Downs ServicingAssetAtFairValueChangesInFairValueDueToPayOffsOrPayDowns	-30583000	usd
CY2022Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	168365000	usd
CY2022	fbk	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Servicing Fee ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageServicingFee	0.0027
CY2023	us-gaap	Assumption For Fair Value Of Assets Or Liabilities That Relate To Transferors Continuing Involvement Weighted Average Life1 AssumptionForFairValueOfAssetsOrLiabilitiesThatRelateToTransferorsContinuingInvolvementWeightedAverageLife1	P334M
CY2022	us-gaap	Assumption For Fair Value Of Assets Or Liabilities That Relate To Transferors Continuing Involvement Weighted Average Life1 AssumptionForFairValueOfAssetsOrLiabilitiesThatRelateToTransferorsContinuingInvolvementWeightedAverageLife1	P332M
CY2023Q4	us-gaap	Escrow Deposit EscrowDeposit	63591000	usd
CY2023	us-gaap	Contractually Specified Servicing Fees Amount ContractuallySpecifiedServicingFeesAmount	30263000	usd
CY2022	us-gaap	Contractually Specified Servicing Fees Amount ContractuallySpecifiedServicingFeesAmount	30763000	usd
CY2023	fbk	Change In Fair Value Of Mortgage Servicing Rights ChangeInFairValueOfMortgageServicingRights	11308000	usd
CY2022	fbk	Change In Fair Value Of Mortgage Servicing Rights ChangeInFairValueOfMortgageServicingRights	-32044000	usd
CY2021	fbk	Change In Fair Value Of Mortgage Servicing Rights ChangeInFairValueOfMortgageServicingRights	3503000	usd
CY2023	fbk	Change In Fair Value Of Derivative Hedging Instruments ChangeInFairValueOfDerivativeHedgingInstruments	4918000	usd
CY2022	fbk	Change In Fair Value Of Derivative Hedging Instruments ChangeInFairValueOfDerivativeHedgingInstruments	42143000	usd
CY2021	fbk	Change In Fair Value Of Derivative Hedging Instruments ChangeInFairValueOfDerivativeHedgingInstruments	8614000	usd
CY2023	fbk	Contractually Specified Servicing Fee Late Fee And Ancillary Fee Earned In Exchange For Servicing Financial Asset Liabilities ContractuallySpecifiedServicingFeeLateFeeAndAncillaryFeeEarnedInExchangeForServicingFinancialAssetLiabilities	14037000	usd
CY2022	fbk	Contractually Specified Servicing Fee Late Fee And Ancillary Fee Earned In Exchange For Servicing Financial Asset Liabilities ContractuallySpecifiedServicingFeeLateFeeAndAncillaryFeeEarnedInExchangeForServicingFinancialAssetLiabilities	20664000	usd
CY2021	fbk	Contractually Specified Servicing Fee Late Fee And Ancillary Fee Earned In Exchange For Servicing Financial Asset Liabilities ContractuallySpecifiedServicingFeeLateFeeAndAncillaryFeeEarnedInExchangeForServicingFinancialAssetLiabilities	16773000	usd
CY2023	fbk	Gross Servicing Expense GrossServicingExpense	8093000	usd
CY2022	fbk	Gross Servicing Expense GrossServicingExpense	10259000	usd
CY2021	fbk	Gross Servicing Expense GrossServicingExpense	9862000	usd
CY2023	fbk	Servicing Income Loss ServicingIncomeLoss	5944000	usd
CY2022	fbk	Servicing Income Loss ServicingIncomeLoss	10405000	usd
CY2021	fbk	Servicing Income Loss ServicingIncomeLoss	6911000	usd
CY2023Q4	us-gaap	Continuing Involvement With Transferred Financial Assets Principal Amount Outstanding ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding	10762906000	usd
CY2022Q4	us-gaap	Continuing Involvement With Transferred Financial Assets Principal Amount Outstanding ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding	11086582000	usd
CY2023	us-gaap	Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Prepayment Speed AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPrepaymentSpeed	0.0619
CY2022	us-gaap	Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Prepayment Speed AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPrepaymentSpeed	0.0555
CY2023Q4	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	4616000	usd
CY2022Q4	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	4886000	usd
CY2023Q4	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	8924000	usd
CY2022Q4	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	9447000	usd
CY2023	us-gaap	Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Discount Rate AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesDiscountRate	0.0962
CY2022	us-gaap	Assumption For Fair Value Of Interests Continued To Be Held By Transferor Servicing Assets Or Liabilities Discount Rate AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesDiscountRate	0.0910
CY2023Q4	fbk	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transfer Or Servicing Assets Or Liabilities Impact Of One Percent Adverse Change In Discount Rate SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferOrServicingAssetsOrLiabilitiesImpactOfOnePercentAdverseChangeInDiscountRate	7637000	usd
CY2022Q4	fbk	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transfer Or Servicing Assets Or Liabilities Impact Of One Percent Adverse Change In Discount Rate SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferOrServicingAssetsOrLiabilitiesImpactOfOnePercentAdverseChangeInDiscountRate	8087000	usd
CY2023Q4	fbk	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transfer Or Servicing Assets Or Liabilities Impact Of Two Percent Adverse Change In Discount Rate SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferOrServicingAssetsOrLiabilitiesImpactOfTwoPercentAdverseChangeInDiscountRate	14624000	usd
CY2022Q4	fbk	Sensitivity Analysis Of Fair Value Of Interests Continued To Be Held By Transfer Or Servicing Assets Or Liabilities Impact Of Two Percent Adverse Change In Discount Rate SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferOrServicingAssetsOrLiabilitiesImpactOfTwoPercentAdverseChangeInDiscountRate	15475000	usd
CY2023	fbk	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Weighted Average Coupon Interest Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageCouponInterestRate	0.0347
CY2022Q4	us-gaap	Escrow Deposit EscrowDeposit	75612000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	34738000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	48769000	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	31631000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	42412000	usd
CY2023Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	25191000	usd
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	22496000	usd
CY2023Q4	fbk	Deposits With Federal Home Loan Banks DepositsWithFederalHomeLoanBanks	20258000	usd
CY2022Q4	fbk	Deposits With Federal Home Loan Banks DepositsWithFederalHomeLoanBanks	19737000	usd
CY2023Q4	fbk	Mortgage Lending Receivable MortgageLendingReceivable	16344000	usd
CY2022Q4	fbk	Mortgage Lending Receivable MortgageLendingReceivable	14425000	usd
CY2023Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	14042000	usd
CY2022Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	23325000	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	13594000	usd
CY2022Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	9280000	usd
CY2023Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	5930000	usd
CY2022Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	7373000	usd
CY2023Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	525000	usd
CY2022Q4	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	108000	usd
CY2023Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	41156000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	40031000	usd
CY2023Q4	us-gaap	Other Assets OtherAssets	203409000	usd
CY2022Q4	us-gaap	Other Assets OtherAssets	227956000	usd
CY2023Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	38215000	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	63229000	usd
CY2023Q4	us-gaap	Deposit Liabilities Accrued Interest DepositLiabilitiesAccruedInterest	18809000	usd
CY2022Q4	us-gaap	Deposit Liabilities Accrued Interest DepositLiabilitiesAccruedInterest	8648000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	18406000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	13592000	usd
CY2023Q4	fbk	Risk Account Guaranty RiskAccountGuaranty	9746000	usd
CY2022Q4	fbk	Risk Account Guaranty RiskAccountGuaranty	9558000	usd
CY2023Q4	fbk	Financing Receivable Allowance For Credit Loss Unfunded Commitments FinancingReceivableAllowanceForCreditLossUnfundedCommitments	8770000	usd
CY2022Q4	fbk	Financing Receivable Allowance For Credit Loss Unfunded Commitments FinancingReceivableAllowanceForCreditLossUnfundedCommitments	22969000	usd
CY2023Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2152000	usd
CY2022Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	2424000	usd
CY2023	us-gaap	Schedule Of Repurchase Agreements ScheduleOfRepurchaseAgreements	<div style="margin-bottom:6pt;margin-top:6pt;text-align:justify"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Information concerning securities sold under agreement to repurchase and federal funds purchased is summarized as follows: </span><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:47.372%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:23.900%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:1.327%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:23.901%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">December 31, 2023</span></td><td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:700;line-height:100%">December 31, 2022</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Balance at year end</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">108,764 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">86,945 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Average daily balance during the year</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">29,860 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">28,497 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Average interest rate during the year</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">2.24 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">0.23 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">%</span></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Maximum month-end balance during the year</span></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">116,220 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">86,945 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;border-bottom:1pt solid #000;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Weighted average interest rate at year-end</span></td><td colspan="2" style="background-color:#cceeff;border-bottom:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">5.05 </span></td><td style="background-color:#cceeff;border-bottom:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">%</span></td><td colspan="3" style="background-color:#cceeff;border-bottom:1pt solid #000;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-bottom:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3.78 </span></td><td style="background-color:#cceeff;border-bottom:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">%</span></td></tr></table></div>
CY2023Q4	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	108764000	usd
CY2022Q4	us-gaap	Federal Funds Purchased And Securities Sold Under Agreements To Repurchase FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase	86945000	usd
CY2023Q4	us-gaap	Participating Mortgage Loans Mortgage Obligations Amount ParticipatingMortgageLoansMortgageObligationsAmount	899000	usd
CY2022Q4	us-gaap	Participating Mortgage Loans Mortgage Obligations Amount ParticipatingMortgageLoansMortgageObligationsAmount	1621000	usd
CY2023Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	45625000	usd
CY2022Q4	us-gaap	Other Sundry Liabilities OtherSundryLiabilities	58932000	usd
CY2023Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	142622000	usd
CY2022Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	180973000	usd
CY2023Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	644588000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	556537000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Next Rolling Twelve Months TimeDepositMaturitiesNextRollingTwelveMonths	1279052000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Rolling Year Two TimeDepositMaturitiesRollingYearTwo	309929000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Rolling Year Three TimeDepositMaturitiesRollingYearThree	14902000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Rolling Year Four TimeDepositMaturitiesRollingYearFour	10239000	usd
CY2023Q4	us-gaap	Time Deposit Maturities Rolling Year Five TimeDepositMaturitiesRollingYearFive	6504000	usd
CY2023Q4	us-gaap	Time Deposit Maturities After Rolling Year Five TimeDepositMaturitiesAfterRollingYearFive	7000	usd
CY2023Q4	us-gaap	Time Deposits TimeDeposits	1620633000	usd
CY2023Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	3475000	usd
CY2022Q4	us-gaap	Deposit Liabilities Reclassified As Loans Receivable1 DepositLiabilitiesReclassifiedAsLoansReceivable1	5725000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	390964000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	415677000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	19328000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	21945000	usd
CY2023	srt	Securities Sold Under Agreements To Repurchase Average Rate Paid SecuritiesSoldUnderAgreementsToRepurchaseAverageRatePaid	0.0160
CY2022	srt	Securities Sold Under Agreements To Repurchase Average Rate Paid SecuritiesSoldUnderAgreementsToRepurchaseAverageRatePaid	0.0018
CY2023Q4	fbk	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral Percentage Of Outstanding Balance SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateralPercentageOfOutstandingBalance	1
CY2023	fbk	Debt Instrument Average Daily Balance During Period DebtInstrumentAverageDailyBalanceDuringPeriod	29860000	usd
CY2022	fbk	Debt Instrument Average Daily Balance During Period DebtInstrumentAverageDailyBalanceDuringPeriod	28497000	usd
CY2023	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0224
CY2022	us-gaap	Debt Instrument Interest Rate During Period DebtInstrumentInterestRateDuringPeriod	0.0023
CY2023	fbk	Debt Instrument Maximum Month End Balance During Year DebtInstrumentMaximumMonthEndBalanceDuringYear	116220000	usd
CY2022	fbk	Debt Instrument Maximum Month End Balance During Year DebtInstrumentMaximumMonthEndBalanceDuringYear	86945000	usd
CY2023Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0505
CY2022Q4	us-gaap	Debt Weighted Average Interest Rate DebtWeightedAverageInterestRate	0.0378
CY2023Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	1757702000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	1270240000	usd
CY2023Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	3014023000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Collateral Pledged1 FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1	2673464000	usd
CY2023Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	0	usd
CY2022Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	175000000	usd
CY2023	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Balance Of Agreements Outstanding FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding	28973000	usd
CY2022	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Balance Of Agreements Outstanding FederalHomeLoanBankAdvancesActivityForYearAverageBalanceOfAgreementsOutstanding	171142000	usd
CY2023	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate For Year FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear	0.0513
CY2022	us-gaap	Federal Home Loan Bank Advances Activity For Year Average Interest Rate For Year FederalHomeLoanBankAdvancesActivityForYearAverageInterestRateForYear	0.0326
CY2023Q4	us-gaap	Federal Home Loan Bank Advances Activity For Year Maximum Outstanding At Any Month End FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd	125000000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Activity For Year Maximum Outstanding At Any Month End FederalHomeLoanBankAdvancesActivityForYearMaximumOutstandingAtAnyMonthEnd	540000000	usd
CY2023Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate FederalHomeLoanBankAdvancesWeightedAverageInterestRate	0
CY2022Q4	us-gaap	Federal Home Loan Bank Advances Weighted Average Interest Rate FederalHomeLoanBankAdvancesWeightedAverageInterestRate	0.0444
CY2023Q4	us-gaap	Subordinated Debt SubordinatedDebt	129645000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1326000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	1420000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	31467000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	22451000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	21980000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1415000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	12552000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	30770000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	0.003
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-122000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.001
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-298000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Reconciling Items Percent EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent	-0.001
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30052000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30052000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35003000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52750000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	31561000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	33510000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	51041000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2023	fbk	Income Tax Reconciliation Change In State Taxes Net Of Federal Benefit IncomeTaxReconciliationChangeInStateTaxesNetOfFederalBenefit	-158000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.001
CY2022	fbk	Income Tax Reconciliation Change In State Taxes Net Of Federal Benefit IncomeTaxReconciliationChangeInStateTaxesNetOfFederalBenefit	3845000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.024
CY2021	fbk	Income Tax Reconciliation Change In State Taxes Net Of Federal Benefit IncomeTaxReconciliationChangeInStateTaxesNetOfFederalBenefit	8788000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.035
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	219000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.001
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-392000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.002
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-2719000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.011
CY2023	fbk	Effective Income Tax Rate Reconciliation Municipal Interest Income Net Of Interest Disallowance Amount EffectiveIncomeTaxRateReconciliationMunicipalInterestIncomeNetOfInterestDisallowanceAmount	1804000	usd
CY2023	fbk	Effective Income Tax Rate Reconciliation Municipal Interest Income Net Of Interest Disallowance Percent EffectiveIncomeTaxRateReconciliationMunicipalInterestIncomeNetOfInterestDisallowancePercent	0.012
CY2022	fbk	Effective Income Tax Rate Reconciliation Municipal Interest Income Net Of Interest Disallowance Amount EffectiveIncomeTaxRateReconciliationMunicipalInterestIncomeNetOfInterestDisallowanceAmount	1774000	usd
CY2022	fbk	Effective Income Tax Rate Reconciliation Municipal Interest Income Net Of Interest Disallowance Percent EffectiveIncomeTaxRateReconciliationMunicipalInterestIncomeNetOfInterestDisallowancePercent	0.011
CY2021	fbk	Effective Income Tax Rate Reconciliation Municipal Interest Income Net Of Interest Disallowance Amount EffectiveIncomeTaxRateReconciliationMunicipalInterestIncomeNetOfInterestDisallowanceAmount	1818000	usd
CY2021	fbk	Effective Income Tax Rate Reconciliation Municipal Interest Income Net Of Interest Disallowance Percent EffectiveIncomeTaxRateReconciliationMunicipalInterestIncomeNetOfInterestDisallowancePercent	0.008
CY2023	fbk	Income Tax Reconciliation Bank Owned Life Insurance IncomeTaxReconciliationBankOwnedLifeInsurance	393000	usd
CY2023	fbk	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsurancePercent	0.003
CY2022	fbk	Income Tax Reconciliation Bank Owned Life Insurance IncomeTaxReconciliationBankOwnedLifeInsurance	305000	usd
CY2022	fbk	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsurancePercent	0.002
CY2021	fbk	Income Tax Reconciliation Bank Owned Life Insurance IncomeTaxReconciliationBankOwnedLifeInsurance	324000	usd
CY2021	fbk	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance Percent EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsurancePercent	0.001
CY2023	fbk	Effective Income Tax Reconciliation Operating Loss Carryback Cares Act Amount EffectiveIncomeTaxReconciliationOperatingLossCarrybackCARESActAmount	0	usd
CY2023	fbk	Effective Income Tax Reconciliation Operating Loss Carryback Cares Act Percent EffectiveIncomeTaxReconciliationOperatingLossCarrybackCARESActPercent	0
CY2022	fbk	Effective Income Tax Reconciliation Operating Loss Carryback Cares Act Amount EffectiveIncomeTaxReconciliationOperatingLossCarrybackCARESActAmount	0	usd
CY2022	fbk	Effective Income Tax Reconciliation Operating Loss Carryback Cares Act Percent EffectiveIncomeTaxReconciliationOperatingLossCarrybackCARESActPercent	0
CY2021	fbk	Effective Income Tax Reconciliation Operating Loss Carryback Cares Act Amount EffectiveIncomeTaxReconciliationOperatingLossCarrybackCARESActAmount	3424000	usd
CY2021	fbk	Effective Income Tax Reconciliation Operating Loss Carryback Cares Act Percent EffectiveIncomeTaxReconciliationOperatingLossCarrybackCARESActPercent	0.014
CY2023	fbk	Income Tax Reconciliation Change In Merger And Offering Costs IncomeTaxReconciliationChangeInMergerAndOfferingCosts	0	usd
CY2023	fbk	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger And Offering Costs EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerAndOfferingCosts	0
CY2022	fbk	Income Tax Reconciliation Change In Merger And Offering Costs IncomeTaxReconciliationChangeInMergerAndOfferingCosts	0	usd
CY2022	fbk	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger And Offering Costs EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerAndOfferingCosts	0
CY2021	fbk	Income Tax Reconciliation Change In Merger And Offering Costs IncomeTaxReconciliationChangeInMergerAndOfferingCosts	123000	usd
CY2021	fbk	Effective Income Tax Rate Reconciliation Nondeductible Expense Merger And Offering Costs EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMergerAndOfferingCosts	0.001
CY2023	fbk	Income Tax Reconciliation Nondeductible Income Share Based Compensation Cost IncomeTaxReconciliationNondeductibleIncomeShareBasedCompensationCost	244000	usd
CY2023	fbk	Income Tax Reconciliation Nondeductible Income Share Based Compensation Cost Percent IncomeTaxReconciliationNondeductibleIncomeShareBasedCompensationCostPercent	0.002
CY2022	fbk	Income Tax Reconciliation Nondeductible Income Share Based Compensation Cost IncomeTaxReconciliationNondeductibleIncomeShareBasedCompensationCost	241000	usd
CY2022	fbk	Income Tax Reconciliation Nondeductible Income Share Based Compensation Cost Percent IncomeTaxReconciliationNondeductibleIncomeShareBasedCompensationCostPercent	0.001
CY2021	fbk	Income Tax Reconciliation Nondeductible Income Share Based Compensation Cost IncomeTaxReconciliationNondeductibleIncomeShareBasedCompensationCost	1381000	usd
CY2021	fbk	Income Tax Reconciliation Nondeductible Income Share Based Compensation Cost Percent IncomeTaxReconciliationNondeductibleIncomeShareBasedCompensationCostPercent	0.006
CY2023	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	383000	usd
CY2023	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.200
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35003000	usd
CY2022	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.219
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52750000	usd
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.217
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	39228000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	38646000	usd
CY2023Q4	fbk	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	24607000	usd
CY2022Q4	fbk	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	25882000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	805000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	1088000	usd
CY2023Q4	fbk	Deferred Tax Assets Amortization Of Core Deposit Intangible DeferredTaxAssetsAmortizationOfCoreDepositIntangible	1135000	usd
CY2022Q4	fbk	Deferred Tax Assets Amortization Of Core Deposit Intangible DeferredTaxAssetsAmortizationOfCoreDepositIntangible	653000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	7433000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	5245000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	48714000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	61004000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4863000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	6691000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	126785000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	139209000	usd
CY2023Q4	fbk	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends	263000	usd
CY2022Q4	fbk	Deferred Tax Liabilities Federal Home Loan Bank Stock Dividends DeferredTaxLiabilitiesFederalHomeLoanBankStockDividends	484000	usd
CY2023Q4	fbk	Deferred Tax Liabilities Operating Lease Right Of Use Asset DeferredTaxLiabilitiesOperatingLeaseRightOfUseAsset	21312000	usd
CY2022Q4	fbk	Deferred Tax Liabilities Operating Lease Right Of Use Asset DeferredTaxLiabilitiesOperatingLeaseRightOfUseAsset	24478000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5996000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	7274000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	2122000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	2287000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	151000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	327000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	42797000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	43869000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	17995000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	15869000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4518000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2209000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	95154000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	96797000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	31631000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	42412000	usd
CY2023Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	218415000	usd
CY2022Q4	us-gaap	Statutory Accounting Practices Statutory Amount Available For Dividend Payments Without Regulatory Approval StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval	161251000	usd
CY2022	us-gaap	Dividends Cash DividendsCash	49000000	usd
CY2023	us-gaap	Dividends Cash DividendsCash	49000000	usd
CY2021	us-gaap	Dividends Cash DividendsCash	122500000	usd
CY2023Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Liability FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability	2983071000	usd
CY2022Q4	us-gaap	Fair Value Disclosure Offbalance Sheet Risks Face Amount Liability FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability	3635232000	usd
CY2023	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	2459669000	usd
CY2022	us-gaap	Loans And Leases Receivable Commitments Variable Rates LoansAndLeasesReceivableCommitmentsVariableRates	2961683000	usd
CY2023	fbk	Principal Amount Of Loans Repurchased Or Indemnified During Period PrincipalAmountOfLoansRepurchasedOrIndemnifiedDuringPeriod	8552000	usd
CY2022	fbk	Principal Amount Of Loans Repurchased Or Indemnified During Period PrincipalAmountOfLoansRepurchasedOrIndemnifiedDuringPeriod	7834000	usd
CY2021	fbk	Principal Amount Of Loans Repurchased Or Indemnified During Period PrincipalAmountOfLoansRepurchasedOrIndemnifiedDuringPeriod	7364000	usd
CY2022Q4	fbk	Allowance For Loan Repurchases Or Indemnifications AllowanceForLoanRepurchasesOrIndemnifications	1621000	usd
CY2021Q4	fbk	Allowance For Loan Repurchases Or Indemnifications AllowanceForLoanRepurchasesOrIndemnifications	4802000	usd
CY2020Q4	fbk	Allowance For Loan Repurchases Or Indemnifications AllowanceForLoanRepurchasesOrIndemnifications	5928000	usd
CY2023	fbk	Provision For Mortgage Loan Repurchases Or Indemnifications ProvisionForMortgageLoanRepurchasesOrIndemnifications	650000	usd
CY2022	fbk	Provision For Mortgage Loan Repurchases Or Indemnifications ProvisionForMortgageLoanRepurchasesOrIndemnifications	2989000	usd
CY2021	fbk	Provision For Mortgage Loan Repurchases Or Indemnifications ProvisionForMortgageLoanRepurchasesOrIndemnifications	766000	usd
CY2023	fbk	Allowance For Loan Repurchases Or Indemnifications Losses On Loans Repurchased Or Indemnified AllowanceForLoanRepurchasesOrIndemnificationsLossesOnLoansRepurchasedOrIndemnified	72000	usd
CY2022	fbk	Allowance For Loan Repurchases Or Indemnifications Losses On Loans Repurchased Or Indemnified AllowanceForLoanRepurchasesOrIndemnificationsLossesOnLoansRepurchasedOrIndemnified	192000	usd
CY2021	fbk	Allowance For Loan Repurchases Or Indemnifications Losses On Loans Repurchased Or Indemnified AllowanceForLoanRepurchasesOrIndemnificationsLossesOnLoansRepurchasedOrIndemnified	360000	usd
CY2023Q4	fbk	Allowance For Loan Repurchases Or Indemnifications AllowanceForLoanRepurchasesOrIndemnifications	899000	usd
CY2022Q4	fbk	Allowance For Loan Repurchases Or Indemnifications AllowanceForLoanRepurchasesOrIndemnifications	1621000	usd
CY2021Q4	fbk	Allowance For Loan Repurchases Or Indemnifications AllowanceForLoanRepurchasesOrIndemnifications	4802000	usd
CY2023Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	4828000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-176000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	532000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	293000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	31468000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	31468000	usd
CY2023Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	6502000	usd
CY2023Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	24966000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	11330000	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	0	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	11330000	usd
CY2023Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	6502000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	44273000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	44273000	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	14229000	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	0	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	30044000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	20251000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	0	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral	20251000	usd
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	14229000	usd
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	6022000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	usd
CY2023Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	14042000	usd
CY2022Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	23325000	usd
CY2023	fbk	Fair Value Recurring Basis Unobservable Input Reconciliation Asset Gain Loss Statement Of Income Extensible List Not Disclosed Flag FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfIncomeExtensibleListNotDisclosedFlag	Changes in valuation included in other noninterest income
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	407217000	usd
CY2023	fbk	Financing Receivable And Unfunded Commitments Credit Loss Expense Reversal FinancingReceivableAndUnfundedCommitmentsCreditLossExpenseReversal	2539000	usd
CY2023	fbk	Fees And Commissions Mortgage Banking Before Adjustments FeesAndCommissionsMortgageBankingBeforeAdjustments	60918000	usd
CY2023	fbk	Change In Fair Value Of Mortgage Servicing Rights And Hedging Instruments ChangeInFairValueOfMortgageServicingRightsAndHedgingInstruments	16226000	usd
CY2023	us-gaap	Noninterest Income Other NoninterestIncomeOther	25851000	usd
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	11180000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3659000	usd
CY2023	us-gaap	Other Noninterest Expense OtherNoninterestExpense	310090000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	150292000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	30052000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	120240000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	16000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	120224000	usd
CY2023Q4	us-gaap	Assets Assets	12604403000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	242561000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	412235000	usd
CY2022	fbk	Financing Receivable And Unfunded Commitments Credit Loss Expense Reversal FinancingReceivableAndUnfundedCommitmentsCreditLossExpenseReversal	18982000	usd
CY2022	fbk	Fees And Commissions Mortgage Banking Before Adjustments FeesAndCommissionsMortgageBankingBeforeAdjustments	83679000	usd
CY2022	fbk	Change In Fair Value Of Mortgage Servicing Rights And Hedging Instruments ChangeInFairValueOfMortgageServicingRightsAndHedgingInstruments	10099000	usd
CY2022	us-gaap	Noninterest Income Other NoninterestIncomeOther	41087000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	8017000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4585000	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	335744000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	159574000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35003000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	124571000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	16000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	124555000	usd
CY2022Q4	us-gaap	Assets Assets	12847756000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	242561000	usd
CY2022	fbk	Mortgage Restructuring Expense MortgageRestructuringExpense	12458000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	347370000	usd
CY2021	fbk	Financing Receivable And Unfunded Commitments Credit Loss Expense Reversal FinancingReceivableAndUnfundedCommitmentsCreditLossExpenseReversal	-40993000	usd
CY2021	fbk	Fees And Commissions Mortgage Banking Before Adjustments FeesAndCommissionsMortgageBankingBeforeAdjustments	179682000	usd
CY2021	fbk	Change In Fair Value Of Mortgage Servicing Rights And Hedging Instruments ChangeInFairValueOfMortgageServicingRightsAndHedgingInstruments	12117000	usd
CY2021	us-gaap	Noninterest Income Other NoninterestIncomeOther	60690000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	8416000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5473000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	359678000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	243051000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52750000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	190301000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	16000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	190285000	usd
CY2021Q4	us-gaap	Assets Assets	12597686000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	242561000	usd
CY2022	fbk	Mortgage Restructuring Expense MortgageRestructuringExpense	12458000	usd
CY2023	us-gaap	Defined Contribution Plan Employers Matching Contribution Annual Vesting Percentage DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage	0.50
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.06
CY2023	fbk	Matching And Profit Sharing Vesting Period MatchingAndProfitSharingVestingPeriod	P3Y
CY2023	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3450000	usd
CY2022	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3686000	usd
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3923000	usd
CY2023Q4	fbk	Post Retirement Benefits Payable PostRetirementBenefitsPayable	2152000	usd
CY2022Q4	fbk	Post Retirement Benefits Payable PostRetirementBenefitsPayable	2424000	usd
CY2023Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	76143000	usd
CY2022Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	75329000	usd
CY2023	fbk	Defined Benefit Plan Cash Value Income DefinedBenefitPlanCashValueIncome	1871000	usd
CY2022	fbk	Defined Benefit Plan Cash Value Income DefinedBenefitPlanCashValueIncome	1452000	usd
CY2021	fbk	Defined Benefit Plan Cash Value Income DefinedBenefitPlanCashValueIncome	1542000	usd
CY2023	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	686000	usd
CY2022	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	1087000	usd
CY2021	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	1190000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	82559000	usd
CY2023	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	10047000	usd
CY2023	fbk	Loans And Leases Receivable Related Parties Changes In Related Party Status LoansAndLeasesReceivableRelatedPartiesChangesInRelatedPartyStatus	37897000	usd
CY2023	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	5636000	usd
CY2023Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	49073000	usd
CY2023Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	316141000	usd
CY2022Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	347660000	usd
CY2023Q4	fbk	Loan Purchase Agreement Maximum Amount LoanPurchaseAgreementMaximumAmount	250000	usd
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false

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fbk-20231231_def.xml	Edgar Link	unprocessable

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2024 Q1 Form 10-K Financial Statement

#000164974924000063 Filed on February 27, 2024

Income Statement

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Facts In Submission

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$FBK FB Financial Corp Stock $fbk

2024 Q1 Form 10-K Financial Statement

#000164974924000063 Filed on February 27, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FBK
FB Financial Corp Stock $fbk