$IBCP
INDEPENDENT BANK CORP /MI/ Stock $ibcp

$ibcp Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000003931123000035 Filed on March 03, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$7.565M		$31.64M
YoY Change	-78.22%		-77.08%
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	$2.425M	$2.487M	$5.300M
YoY Change	-15.45%	-11.18%	-1.85%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$15.50M		$19.45M
YoY Change	790.52%		133.88%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$15.88M	$18.59M	$77.79M
YoY Change	-28.08%	20.16%	0.61%
Income Tax	$2.900M	$3.503M	$14.44M
% Of Pretax Income	18.27%	18.84%	18.56%
Net Earnings	$12.99M	$15.09M	$63.35M
YoY Change	-27.7%	20.59%	0.73%
Net Earnings / Revenue	171.73%		200.21%
Basic Earnings Per Share	$0.62		$3.00
Diluted Earnings Per Share	$0.61	$0.71	$2.97
COMMON SHARES
Basic Shares Outstanding	21.13M shares	21.07M shares	21.10M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$227.0M	$74.37M
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	$35.76M	$35.89M	$41.44M
YoY Change	-17.7%	-1.4%	-3.41%
Goodwill	$28.30M	$28.30M
YoY Change	0.0%	0.0%
Intangibles	$2.415M	$2.551M
YoY Change		-23.53%
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$5.139B	$5.000B	$5.000B
YoY Change	7.92%	6.27%	6.27%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$97.31M	$108.0M	$108.0M
YoY Change	5.72%	34.69%	34.69%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$97.31M	$108.0M	$108.0M
YoY Change	5.72%	34.69%	34.69%
LONG-TERM LIABILITIES
Long-Term Debt	$79.13M	$79.10M	$79.10M
YoY Change	0.17%	0.13%	0.13%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$79.13M	$79.10M	$79.10M
YoY Change	0.17%	0.13%	0.13%
TOTAL LIABILITIES
Total Short-Term Liabilities	$97.31M	$108.0M	$108.0M
Total Long-Term Liabilities	$79.13M	$79.10M	$79.10M
Total Liabilities	$4.771B	$4.652B	$4.652B
YoY Change	8.28%	8.03%	8.03%
SHAREHOLDERS EQUITY
Retained Earnings	$127.5M	$119.4M
YoY Change		60.05%
Common Stock	$321.0M	$321.0M
YoY Change		-0.75%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$367.7M	$347.6M	$347.6M
YoY Change
Total Liabilities & Shareholders Equity	$5.139B	$5.000B	$5.000B
YoY Change	7.92%	6.27%	6.27%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$12.99M	$15.09M	$63.35M
YoY Change	-27.7%	20.59%	0.73%
Depreciation, Depletion And Amortization	$2.425M	$2.487M	$5.300M
YoY Change	-15.45%	-11.18%	-1.85%
Cash From Operating Activities	$23.56M	-$736.0K	$94.63M
YoY Change	-38.92%	-101.36%	-14.09%
INVESTING ACTIVITIES
Capital Expenditures	$1.325M	$1.710M	$5.679M
YoY Change	-155.65%	-231.54%	-2.71%
Acquisitions
YoY Change
Other Investing Activities	$6.105M	-$40.52M	-$418.9M
YoY Change	-105.19%	-75.6%	-24.82%
Cash From Investing Activities	$4.780M	-$42.23M	-$424.6M
YoY Change	-103.98%	-74.79%	-24.59%
FINANCING ACTIVITIES
Cash Dividend Paid	$4.860M		$18.57M
YoY Change	4.14%		2.26%
Common Stock Issuance & Retirement, Net			$3.933M
YoY Change			-77.14%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$124.3M	46.71M	$294.9M
YoY Change	51.95%	-51.9%	-33.54%
NET CHANGE
Cash From Operating Activities	$23.56M	-736.0K	$94.63M
Cash From Investing Activities	$4.780M	-42.23M	-$424.6M
Cash From Financing Activities	$124.3M	46.71M	$294.9M
Net Change In Cash	$152.6M	3.739M	-$35.10M
YoY Change	43764.37%	-123.22%	280.22%
FREE CASH FLOW
Cash From Operating Activities	$23.56M	-$736.0K	$94.63M
Capital Expenditures	$1.325M	$1.710M	$5.679M
Free Cash Flow	$22.23M	-$2.446M	$88.95M
YoY Change	-45.71%	-104.4%	-14.73%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	0-7818
CY2022	dei	Entity Registrant Name EntityRegistrantName	INDEPENDENT BANK CORPORATION
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MI
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	38-2032782
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	4200 East Beltline
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Grand Rapids
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	MI
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	49525
CY2022	dei	City Area Code CityAreaCode	616
CY2022	dei	Local Phone Number LocalPhoneNumber	527-5820
CY2022	dei	Security12b Title Security12bTitle	Common Stock, No Par Value
CY2022	dei	Trading Symbol TradingSymbol	IBCP
CY2022	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	397300287	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	21130307	shares
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CY2022Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherLiabilities
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CY2022Q4	us-gaap	Derivative Liability Statement Of Financial Position Extensible Enumeration DerivativeLiabilityStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2022#OtherLiabilities
CY2021Q4	us-gaap	Derivative Asset Statement Of Financial Position Extensible Enumeration DerivativeAssetStatementOfFinancialPositionExtensibleEnumeration	http://fasb.org/us-gaap/2022#OtherAssets
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CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0000039311
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Amendment Flag AmendmentFlag	false
CY2022	dei	Auditor Firm AuditorFirmId	173
CY2022	dei	Auditor Name AuditorName	Crowe LLP
CY2022	dei	Auditor Location AuditorLocation	South Bend, Indiana
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CY2022Q4	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	4191000	usd
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CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	779347000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1412830000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	335418000	usd
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	0	usd
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CY2021Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss	0	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	17653000	usd
CY2021Q4	us-gaap	Federal Home Loan Bank Stock And Federal Reserve Bank Stock FederalHomeLoanBankStockAndFederalReserveBankStock	18427000	usd
CY2022Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	26518000	usd
CY2021Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	55470000	usd
CY2022Q4	ibcp	Loans Held For Sale Carried At The Lower Of Cost Or Fair Value LoansHeldForSaleCarriedAtTheLowerOfCostOrFairValue	20367000	usd
CY2021Q4	ibcp	Loans Held For Sale Carried At The Lower Of Cost Or Fair Value LoansHeldForSaleCarriedAtTheLowerOfCostOrFairValue	34811000	usd
CY2022Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	3465352000	usd
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CY2022Q4	us-gaap	Notes Receivable Net NotesReceivableNet	3412917000	usd
CY2021Q4	us-gaap	Notes Receivable Net NotesReceivableNet	2857793000	usd
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	455000	usd
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	245000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	35893000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	36404000	usd
CY2022Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	55204000	usd
CY2021Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	55279000	usd
CY2022Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	42489000	usd
CY2021Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	26232000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	2551000	usd
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3336000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	28300000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	28300000	usd
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CY2021Q4	us-gaap	Assets Assets	4704740000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1269759000	usd
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	1321601000	usd
CY2022Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1973308000	usd
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	1897487000	usd
CY2022Q4	ibcp	Reciprocal Deposits ReciprocalDeposits	602575000	usd
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CY2022	ibcp	Interchange Income InterchangeIncome	13955000	usd
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CY2022	ibcp	Depositor Accounts Fees And Commissions DepositorAccountsFeesAndCommissions	12288000	usd
CY2021	ibcp	Depositor Accounts Fees And Commissions DepositorAccountsFeesAndCommissions	10170000	usd
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CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	35880000	usd
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	62560000	usd
CY2022	us-gaap	Marketable Securities Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments	-275000	usd
CY2021	us-gaap	Marketable Securities Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments	1411000	usd
CY2020	us-gaap	Marketable Securities Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments	267000	usd
CY2022	ibcp	Mortgage Loan Servicing Income MortgageLoanServicingIncome	18773000	usd
CY2021	ibcp	Mortgage Loan Servicing Income MortgageLoanServicingIncome	5745000	usd
CY2020	ibcp	Mortgage Loan Servicing Income MortgageLoanServicingIncome	-9350000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10737000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9392000	usd
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7521000	usd
CY2022	us-gaap	Noninterest Income NoninterestIncome	61909000	usd
CY2021	us-gaap	Noninterest Income NoninterestIncome	76643000	usd
CY2020	us-gaap	Noninterest Income NoninterestIncome	80745000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	81007000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	79969000	usd
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	74781000	usd
CY2022	ibcp	Data Processing DataProcessing	10183000	usd
CY2021	ibcp	Data Processing DataProcessing	10823000	usd
CY2020	ibcp	Data Processing DataProcessing	8534000	usd
CY2022	us-gaap	Occupancy Net OccupancyNet	8907000	usd
CY2021	us-gaap	Occupancy Net OccupancyNet	8794000	usd
CY2020	us-gaap	Occupancy Net OccupancyNet	8938000	usd
CY2022	ibcp	Interchange Expense InterchangeExpense	4242000	usd
CY2021	ibcp	Interchange Expense InterchangeExpense	4434000	usd
CY2020	ibcp	Interchange Expense InterchangeExpense	3342000	usd
CY2022	us-gaap	Equipment Expense EquipmentExpense	4007000	usd
CY2021	us-gaap	Equipment Expense EquipmentExpense	4172000	usd
CY2020	us-gaap	Equipment Expense EquipmentExpense	4089000	usd
CY2022	us-gaap	Communication Communication	2871000	usd
CY2021	us-gaap	Communication Communication	3080000	usd
CY2020	us-gaap	Communication Communication	3194000	usd
CY2022	ibcp	Loan And Collection LoanAndCollection	2657000	usd
CY2021	ibcp	Loan And Collection LoanAndCollection	3172000	usd
CY2020	ibcp	Loan And Collection LoanAndCollection	3037000	usd
CY2022	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	2142000	usd
CY2021	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1396000	usd
CY2020	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	1596000	usd
CY2022	us-gaap	Professional Fees ProfessionalFees	2133000	usd
CY2021	us-gaap	Professional Fees ProfessionalFees	2068000	usd
CY2020	us-gaap	Professional Fees ProfessionalFees	2027000	usd
CY2022	us-gaap	Advertising Expense AdvertisingExpense	2074000	usd
CY2021	us-gaap	Advertising Expense AdvertisingExpense	1918000	usd
CY2020	us-gaap	Advertising Expense AdvertisingExpense	2230000	usd
CY2022	ibcp	Costs Related To Unfunded Lending Commitments CostsRelatedToUnfundedLendingCommitments	599000	usd
CY2021	ibcp	Costs Related To Unfunded Lending Commitments CostsRelatedToUnfundedLendingCommitments	1207000	usd
CY2020	ibcp	Costs Related To Unfunded Lending Commitments CostsRelatedToUnfundedLendingCommitments	263000	usd
CY2022	ibcp	Conversion Related Expense ConversionRelatedExpense	50000	usd
CY2021	ibcp	Conversion Related Expense ConversionRelatedExpense	1827000	usd
CY2020	ibcp	Conversion Related Expense ConversionRelatedExpense	2586000	usd
CY2022	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7469000	usd
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8163000	usd
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	7796000	usd
CY2022	us-gaap	Noninterest Expense NoninterestExpense	128341000	usd
CY2021	us-gaap	Noninterest Expense NoninterestExpense	131023000	usd
CY2020	us-gaap	Noninterest Expense NoninterestExpense	122413000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	77788000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	77313000	usd
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	69481000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14437000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14418000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13329000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	63351000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	62895000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	56152000	usd
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.00
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.91
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.56
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.97
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.88
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.53
CY2022	us-gaap	Net Income Loss NetIncomeLoss	63351000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	62895000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	56152000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-95263000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-10644000	usd
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	15611000	usd
CY2022	ibcp	Other Comprehensive Income Loss Available For Sale Securities Other Than Temporary Impairment Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesOtherThanTemporaryImpairmentLossAdjustmentBeforeReclassificationAdjustmentsAndTax	0	usd
CY2021	ibcp	Other Comprehensive Income Loss Available For Sale Securities Other Than Temporary Impairment Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesOtherThanTemporaryImpairmentLossAdjustmentBeforeReclassificationAdjustmentsAndTax	0	usd
CY2020	ibcp	Other Comprehensive Income Loss Available For Sale Securities Other Than Temporary Impairment Loss Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesOtherThanTemporaryImpairmentLossAdjustmentBeforeReclassificationAdjustmentsAndTax	-49000	usd
CY2022	ibcp	Oci Debt Securities Available For Sale Transfer To Held To Maturity Gain Loss Before Tax OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityGainLossBeforeTax	-26479000	usd
CY2021	ibcp	Oci Debt Securities Available For Sale Transfer To Held To Maturity Gain Loss Before Tax OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityGainLossBeforeTax	0	usd
CY2020	ibcp	Oci Debt Securities Available For Sale Transfer To Held To Maturity Gain Loss Before Tax OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityGainLossBeforeTax	0	usd
CY2022	us-gaap	Oci Debt Securities Available For Sale Transfer To Held To Maturity Adjustment From Aoci For Amortization Of Gain Loss Before Tax OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax	-3413000	usd
CY2021	us-gaap	Oci Debt Securities Available For Sale Transfer To Held To Maturity Adjustment From Aoci For Amortization Of Gain Loss Before Tax OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax	0	usd
CY2020	us-gaap	Oci Debt Securities Available For Sale Transfer To Held To Maturity Adjustment From Aoci For Amortization Of Gain Loss Before Tax OciDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAociForAmortizationOfGainLossBeforeTax	0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-275000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	1411000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	267000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-118054000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-12055000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	15295000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-24790000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-2532000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	3212000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-93264000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-9523000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	12083000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-354000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-2539000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent	2185000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease Adjustments Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease Adjustments Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsTax	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Derivative Excluded Component Increase Decrease Adjustments Tax OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsTax	-458000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	usd
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	1727000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-93264000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-9523000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	13810000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-29913000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	53372000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	69962000	usd
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	350169000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	56152000	usd
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.80
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	17618000	usd
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	708956	shares
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	14231000	usd
CY2020	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	17317	shares
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	15000	usd
CY2020	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	103429	shares
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1980000	usd
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18565000	usd
CY2022	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	181586	shares
CY2020	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	39633	shares
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	755000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	13810000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	389522000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	62895000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.84
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	18155000	usd
CY2021	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	814910	shares
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	17269000	usd
CY2021	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	40350	shares
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	61000	usd
CY2021	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	128018	shares
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1947000	usd
CY2021	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	36222	shares
CY2021	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	691000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-9523000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	398484000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	63351000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.88
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	4010000	usd
CY2022	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	40532	shares
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	77000	usd
CY2022	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	62114	shares
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	2143000	usd
CY2022	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	28125	shares
CY2022	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	620000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-93264000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	347596000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	63351000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	62895000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	56152000	usd
CY2022	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	549079000	usd
CY2021	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	1283741000	usd
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	1478908000	usd
CY2022	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	514244000	usd
CY2021	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1210897000	usd
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1438982000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	5341000	usd
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	-1928000	usd
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	12463000	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	359000	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-1912000	usd
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2130000	usd
CY2022	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	4155000	usd
CY2021	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	7857000	usd
CY2020	us-gaap	Increase Decrease In Loans Deferred Income IncreaseDecreaseInLoansDeferredIncome	-1686000	usd
CY2022	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	10827000	usd
CY2021	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	12130000	usd
CY2020	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	9161000	usd
CY2022	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	6431000	usd
CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	35880000	usd
CY2020	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	62560000	usd
CY2022	us-gaap	Marketable Securities Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments	-275000	usd
CY2021	us-gaap	Marketable Securities Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments	1411000	usd
CY2020	us-gaap	Marketable Securities Gain Loss Excluding Other Than Temporary Impairments MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments	267000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	2143000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	1947000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	1980000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	25843000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	11669000	usd
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7966000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	14648000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	17171000	usd
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	10239000	usd
CY2022	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	31281000	usd
CY2021	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	47259000	usd
CY2020	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	2532000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	94632000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	110154000	usd
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	58684000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	70523000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	85371000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	38095000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	167550000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	375723000	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	306691000	usd
CY2022	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	21964000	usd
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	usd
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	0	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	137550000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	824348000	usd
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	859068000	usd
CY2022	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	2658000	usd
CY2021	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	usd
CY2020	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	usd
CY2022	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	0	usd
CY2021	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	0	usd
CY2020	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	350000	usd
CY2022	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	774000	usd
CY2021	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	usd
CY2020	us-gaap	Proceeds From Sale Of Federal Home Loan Bank Stock ProceedsFromSaleOfFederalHomeLoanBankStock	0	usd
CY2022	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	0	usd
CY2021	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	0	usd
CY2020	us-gaap	Payments To Acquire Federal Home Loan Bank Stock PaymentsToAcquireFederalHomeLoanBankStock	68000	usd
CY2022	ibcp	Net Increase Decrease Of Portfolio Loans Originated Net Of Principal Payments NetIncreaseDecreaseOfPortfolioLoansOriginatedNetOfPrincipalPayments	605902000	usd
CY2021	ibcp	Net Increase Decrease Of Portfolio Loans Originated Net Of Principal Payments NetIncreaseDecreaseOfPortfolioLoansOriginatedNetOfPrincipalPayments	205539000	usd
CY2020	ibcp	Net Increase Decrease Of Portfolio Loans Originated Net Of Principal Payments NetIncreaseDecreaseOfPortfolioLoansOriginatedNetOfPrincipalPayments	41861000	usd
CY2022	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	63397000	usd
CY2021	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	10032000	usd
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	2395000	usd
CY2022	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	723000	usd
CY2021	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	1004000	usd
CY2020	us-gaap	Proceeds From Sale Of Foreclosed Assets ProceedsFromSaleOfForeclosedAssets	1367000	usd
CY2022	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	433000	usd
CY2021	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	467000	usd
CY2020	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1441000	usd
CY2022	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1833000	usd
CY2021	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	63000	usd
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1133000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5679000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5837000	usd
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	4383000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-424592000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-563064000	usd
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-553908000	usd
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	261979000	usd
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	479735000	usd
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	600628000	usd
CY2022	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	60997000	usd
CY2021	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-3000	usd
CY2020	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-24994000	usd
CY2022	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	290000000	usd
CY2021	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	100000000	usd
CY2020	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	239254000	usd
CY2022	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	295000000	usd
CY2021	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	100000000	usd
CY2020	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	272910000	usd
CY2022	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	usd
CY2020	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	39236000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	18565000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	18155000	usd
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	17618000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	77000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	61000	usd
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	15000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4010000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	17269000	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	14231000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	620000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	691000	usd
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	755000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	294858000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	443678000	usd
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	548625000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-35102000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-9232000	usd
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	53401000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	109473000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	118705000	usd
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	65304000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	74371000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	109473000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	118705000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	17657000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	8419000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	16912000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	10040000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	14059000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	15500000	usd
CY2022	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	719000	usd
CY2021	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	253000	usd
CY2020	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	332000	usd
CY2022	ibcp	Transfer Of Securities From Available For Sale To Held To Maturity TransferOfSecuritiesFromAvailableForSaleToHeldToMaturity	391618000	usd
CY2021	ibcp	Transfer Of Securities From Available For Sale To Held To Maturity TransferOfSecuritiesFromAvailableForSaleToHeldToMaturity	0	usd
CY2020	ibcp	Transfer Of Securities From Available For Sale To Held To Maturity TransferOfSecuritiesFromAvailableForSaleToHeldToMaturity	0	usd
CY2022	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	20367000	usd
CY2021	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	34811000	usd
CY2020	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	0	usd
CY2022	ibcp	Securitization Of Portfolio Loans SecuritizationOfPortfolioLoans	0	usd
CY2021	ibcp	Securitization Of Portfolio Loans SecuritizationOfPortfolioLoans	0	usd
CY2020	ibcp	Securitization Of Portfolio Loans SecuritizationOfPortfolioLoans	26324000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	791000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	283000	usd
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1587000	usd
CY2022	ibcp	Purchase Of Securities Available For Sale Not Yet Settled PurchaseOfSecuritiesAvailableForSaleNotYetSettled	0	usd
CY2021	ibcp	Purchase Of Securities Available For Sale Not Yet Settled PurchaseOfSecuritiesAvailableForSaleNotYetSettled	0	usd
CY2020	ibcp	Purchase Of Securities Available For Sale Not Yet Settled PurchaseOfSecuritiesAvailableForSaleNotYetSettled	1000000	usd
CY2022Q4	ibcp	Percentage Of Loan Portfolio Secured By Real Estate PercentageOfLoanPortfolioSecuredByRealEstate	0.696
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2022	ibcp	Mortgage Loan Servicing Fees MortgageLoanServicingFees	8600000	usd
CY2021	ibcp	Mortgage Loan Servicing Fees MortgageLoanServicingFees	7900000	usd
CY2020	ibcp	Mortgage Loan Servicing Fees MortgageLoanServicingFees	6900000	usd
CY2022Q2	ibcp	Debt Securities Available For Sale Transferred To Held To Maturity Amortized Cost Basis DebtSecuritiesAvailableForSaleTransferredToHeldToMaturityAmortizedCostBasis	418100000	usd
CY2022Q2	ibcp	Debt Securities Available For Sale Transferred To Held To Maturity Unrealized Loss Position DebtSecuritiesAvailableForSaleTransferredToHeldToMaturityUnrealizedLossPosition	26500000	usd
CY2022	us-gaap	Revenue Recognition Interest RevenueRecognitionInterest	<div style="margin-top:12pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">LOAN REVENUE RECOGNITION </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">— Interest on loans is accrued based on the principal amounts outstanding. In general, the accrual of interest income is discontinued when a loan becomes 90 days past due for commercial loans and installment loans and when a loan misses four consecutive payments for mortgage loans and the borrower’s capacity to repay the loan and collateral values appear insufficient for each loan class. However, loans may be placed on non-accrual status regardless of whether or not such loans are considered past due if, in management’s opinion, the borrower is unable to meet payment obligations as they become due or as required by regulatory provisions. All interest accrued but not received for all loans placed on non-accrual is reversed from interest income. Payments on such loans are generally applied to the principal balance until qualifying to be returned to accrual status. A non-accrual loan may be restored to accrual status when interest and principal payments are current and the loan appears otherwise collectible. Delinquency status for all classes in the commercial and installment loan portfolio segments is based on the actual number of days past due as required by the contractual terms of the loan agreement while delinquency status for mortgage loan portfolio segment classes is based on the number of payments past due.</span></div><div style="margin-top:12pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain loan fees and direct loan origination costs are deferred and recognized as an adjustment of yield generally over the contractual life of the related loan. Fees received in connection with loan commitments are deferred until the loan is advanced and are then recognized generally over the contractual life of the loan as an adjustment of yield. Fees on commitments that expire unused are recognized at expiration. Fees received for letters of credit are recognized as revenue over the life of the commitment.</span></div>
CY2022	ibcp	Number Of Past Due Days For Commercial Loan Installment Loans And Payment Plan Receivables NumberOfPastDueDaysForCommercialLoanInstallmentLoansAndPaymentPlanReceivables	P90D
CY2022Q4	ibcp	Number Of Consecutive Mortgage Loan Payments Missed NumberOfConsecutiveMortgageLoanPaymentsMissed	4	payment
CY2022Q4	ibcp	Group Flexible Premium Non Participating Variable Life Insurance Contract GroupFlexiblePremiumNonParticipatingVariableLifeInsuranceContract	259	employee
CY2022	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">RECLASSIFICATION </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">— Certain amounts in the 2021 and 2020 consolidated financial statements have been reclassified to conform to the 2022 presentation.</span>
CY2020Q1	ibcp	Average Reserve Balance Required To Be Maintained AverageReserveBalanceRequiredToBeMaintained	0	usd
CY2021	ibcp	Average Reserve Balance Required To Be Maintained AverageReserveBalanceRequiredToBeMaintained	0	usd
CY2022	ibcp	Average Reserve Balance Required To Be Maintained AverageReserveBalanceRequiredToBeMaintained	0	usd
CY2022Q4	ibcp	Reserve Balances Maintained At Other Financial Institutions ReserveBalancesMaintainedAtOtherFinancialInstitutions	300000	usd
CY2021Q4	ibcp	Reserve Balances Maintained At Other Financial Institutions ReserveBalancesMaintainedAtOtherFinancialInstitutions	0	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	866363000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	329000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	87345000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	779347000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	1404858000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	16594000	usd
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	8622000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	1412830000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestAfterAllowanceForCreditLoss	374818000	usd
CY2022Q4	ibcp	Debt Securities Held To Maturity Transfer Unrealized Loss DebtSecuritiesHeldToMaturityTransferUnrealizedLoss	23066000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	168000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	398052000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	11000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	62645000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	335418000	usd
CY2022Q2	ibcp	Debt Securities Available For Sale Transferred To Held To Maturity Amortized Cost Basis DebtSecuritiesAvailableForSaleTransferredToHeldToMaturityAmortizedCostBasis	418100000	usd
CY2022Q2	ibcp	Debt Securities Available For Sale Transferred To Held To Maturity Unrealized Loss Position DebtSecuritiesAvailableForSaleTransferredToHeldToMaturityUnrealizedLossPosition	26500000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	275781000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	19984000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	490301000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	67361000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	766082000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	87345000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	607923000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	8077000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	33530000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	545000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	641453000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	8622000	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 Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	4700000	usd
CY2021Q4	us-gaap	Debt Securities Available For Sale Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss	6000000.0	usd
CY2021Q4	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
CY2020Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Accrued Interest After Allowance For Credit Loss DebtSecuritiesHeldToMaturityAccruedInterestAfterAllowanceForCreditLoss	1800000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	168000	usd
CY2021Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	0	usd
CY2022	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Credit Loss Expense Reversal DebtSecuritiesHeldToMaturityExcludingAccruedInterestCreditLossExpenseReversal	168000	usd
CY2022	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Allowance For Credit Loss Recovery DebtSecuritiesHeldToMaturityExcludingAccruedInterestAllowanceForCreditLossRecovery	0	usd
CY2022	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Allowance For Credit Loss Writeoff DebtSecuritiesHeldToMaturityExcludingAccruedInterestAllowanceForCreditLossWriteoff	0	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesHeldToMaturityAllowanceForCreditLossExcludingAccruedInterest	168000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	11663000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	11521000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date Year One DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateYearOne	5959000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Within One Year Fair Value HeldToMaturitySecuritiesDebtMaturitiesWithinOneYearFairValue	5928000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	119701000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	107942000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date After Year One Through Five DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYearOneThroughFive	45013000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After One Through Five Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	40838000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	108819000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	91876000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date After Year5 Through10 DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear5Through10	116115000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Five Through Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	100641000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	207482000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	175527000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss Maturity Allocated And Single Maturity Date After Year10 DebtSecuritiesHeldToMaturityAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLossMaturityAllocatedAndSingleMaturityDateAfterYear10	89785000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	73663000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	447665000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	386866000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	256872000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	221070000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	866363000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	779347000	usd
CY2022Q4	us-gaap	Debt Securities Held To Maturity Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesHeldToMaturityExcludingAccruedInterestBeforeAllowanceForCreditLoss	398052000	usd
CY2022Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	335418000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	70523000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	164000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	439000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	85371000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1475000	usd
CY2021Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	22400000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	64000	usd
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	38095000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	271000	usd
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	4000	usd
CY2021Q4	ibcp	Book Value Of Pledged Securities BookValueOfPledgedSecurities	10500000	usd
CY2022Q4	ibcp	Book Value Of Pledged Securities BookValueOfPledgedSecurities	0	usd
CY2022Q4	ibcp	State And Political Subdivision Shareholders Equity Threshold StateAndPoliticalSubdivisionShareholdersEquityThreshold	0.10
CY2021Q4	ibcp	State And Political Subdivision Shareholders Equity Threshold StateAndPoliticalSubdivisionShareholdersEquityThreshold	0.10
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	3465352000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	2905045000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	52435000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	47252000	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	3412917000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest After Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss	2857793000	usd
CY2022Q4	us-gaap	Financing Receivable Unamortized Loan Commitment Origination Fee And Premium Discount FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount	26600000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	47252000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	5173000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	2496000	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	2486000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	52435000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	35429000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	-1928000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Purchased With Credit Deterioration Allowance For Credit Loss At Acquisition Date FinancingReceivableExcludingAccruedInterestPurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate	134000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	4477000	usd
CY2021	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	2434000	usd
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	47252000	usd
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	26148000	usd
CY2020	us-gaap	Financing Receivable Excluding Accrued Interest Credit Loss Expense Reversal FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal	12463000	usd
CY2020	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Recovery FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery	3069000	usd
CY2020	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	6251000	usd
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	35429000	usd
CY2022Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	52435000	usd
CY2022Q4	ibcp	Financing Receivable Percentage Of Loans To Portfolio Loans FinancingReceivablePercentageOfLoansToPortfolioLoans	1.000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Loss Excluding Accrued Interest FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest	47252000	usd
CY2021Q4	ibcp	Financing Receivable Percentage Of Loans To Portfolio Loans FinancingReceivablePercentageOfLoansToPortfolioLoans	1.000
CY2022	ibcp	Non Performing Loan Interest Income NonPerformingLoanInterestIncome	200000	usd
CY2021	ibcp	Non Performing Loan Interest Income NonPerformingLoanInterestIncome	200000	usd
CY2020	ibcp	Non Performing Loan Interest Income NonPerformingLoanInterestIncome	500000	usd
CY2022	ibcp	Non Performing Loan Interest Income Recorded NonPerformingLoanInterestIncomeRecorded	0	usd
CY2021	ibcp	Non Performing Loan Interest Income Recorded NonPerformingLoanInterestIncomeRecorded	0	usd
CY2020	ibcp	Non Performing Loan Interest Income Recorded NonPerformingLoanInterestIncomeRecorded	0	usd
CY2022Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	3465352000	usd
CY2022Q4	us-gaap	Financing Receivable Accrued Interest Before Allowance For Credit Loss FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss	10009000	usd
CY2021Q4	us-gaap	Financing Receivable Excluding Accrued Interest Before Allowance For Credit Loss FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss	2905045000	usd
CY2021Q4	us-gaap	Financing Receivable Accrued Interest Before Allowance For Credit Loss FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss	6836000	usd
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	1724000	usd
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	23000	usd
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	55600000	usd
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	4828000	usd
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	57324000	usd
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	4851000	usd
CY2022Q4	ibcp	Troubled Debt Restructuring TroubledDebtRestructuring	30189000	usd
CY2021Q4	ibcp	Troubled Debt Restructuring TroubledDebtRestructuring	37086000	usd
CY2022	ibcp	Number Of Consecutive Timely Payments Required NumberOfConsecutiveTimelyPaymentsRequired	6	payment
CY2022Q4	ibcp	Troubled Debt Restructuring Loans And Leases Receivable Specific Allowance TroubledDebtRestructuringLoansAndLeasesReceivableSpecificAllowance	3700000	usd
CY2021Q4	ibcp	Troubled Debt Restructuring Loans And Leases Receivable Specific Allowance TroubledDebtRestructuringLoansAndLeasesReceivableSpecificAllowance	3600000	usd
CY2021Q4	ibcp	Additional Amounts Committed To Lend As Troubled Debt Restructurings AdditionalAmountsCommittedToLendAsTroubledDebtRestructurings	40000.00	usd
CY2022Q4	ibcp	Additional Amounts Committed To Lend As Troubled Debt Restructurings AdditionalAmountsCommittedToLendAsTroubledDebtRestructurings	40000.00	usd
CY2022	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	contract
CY2022	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	265000	usd
CY2022	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	291000	usd
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	24	contract
CY2020	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	8822000	usd
CY2020	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	8848000	usd
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	usd
CY2022	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease	30000.00	usd
CY2020	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Period Increase Decrease FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossPeriodIncreaseDecrease	40000.00	usd
CY2022	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	usd
CY2020	us-gaap	Financing Receivables Impaired Troubled Debt Restructuring Write Down FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown	0	usd
CY2022	ibcp	Past Due Period For Modified Loans PastDuePeriodForModifiedLoans	P90D
CY2022Q4	ibcp	Number Of Consecutive Mortgage Loan Payments Missed NumberOfConsecutiveMortgageLoanPaymentsMissed	4	payment
CY2021	ibcp	Allowance For Doubtful Accounts Receivable Charge Offs Due To Tdr AllowanceForDoubtfulAccountsReceivableChargeOffsDueToTDR	0	usd
CY2022	ibcp	Allowance For Doubtful Accounts Receivable Charge Offs Due To Tdr AllowanceForDoubtfulAccountsReceivableChargeOffsDueToTDR	0	usd
CY2020	ibcp	Allowance For Doubtful Accounts Receivable Charge Offs Due To Tdr AllowanceForDoubtfulAccountsReceivableChargeOffsDueToTDR	0	usd
CY2022Q4	ibcp	Principal Amount Outstanding On Loans Serviced For Others PrincipalAmountOutstandingOnLoansServicedForOthers	3493312000	usd
CY2021Q4	ibcp	Principal Amount Outstanding On Loans Serviced For Others PrincipalAmountOutstandingOnLoansServicedForOthers	3323521000	usd
CY2022Q4	us-gaap	Escrow Deposit EscrowDeposit	28400000	usd
CY2021Q4	us-gaap	Escrow Deposit EscrowDeposit	39400000	usd
CY2022Q4	ibcp	Maximum Number Of Consecutive Quarterly Losses Recorded For Profitability Requirement MaximumNumberOfConsecutiveQuarterlyLossesRecordedForProfitabilityRequirement	4	q
CY2022Q4	ibcp	Percentage Of Decline In Net Worth During The Period PercentageOfDeclineInNetWorthDuringThePeriod	0.30
CY2022Q4	ibcp	Maximum Percentage Of Decline In Net Worth For One Consecutive Quarter MaximumPercentageOfDeclineInNetWorthForOneConsecutiveQuarter	0.25
CY2022Q4	ibcp	Maximum Percentage Of Decline In Net Worth For Two Consecutive Quarters MaximumPercentageOfDeclineInNetWorthForTwoConsecutiveQuarters	0.40
CY2021Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	26232000	usd
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	16904000	usd
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	19171000	usd
CY2022	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	6061000	usd
CY2021	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	11436000	usd
CY2020	us-gaap	Servicing Asset At Amortized Value Additions ServicingAssetAtAmortizedValueAdditions	13957000	usd
CY2022	ibcp	Servicing Asset At Fair Value Changes In Fair Value Due To Price ServicingAssetAtFairValueChangesInFairValueDueToPrice	14272000	usd
CY2021	ibcp	Servicing Asset At Fair Value Changes In Fair Value Due To Price ServicingAssetAtFairValueChangesInFairValueDueToPrice	3380000	usd
CY2020	ibcp	Servicing Asset At Fair Value Changes In Fair Value Due To Price ServicingAssetAtFairValueChangesInFairValueDueToPrice	-10833000	usd
CY2022	ibcp	Servicing Asset At Fair Value Changes In Pay Downs ServicingAssetAtFairValueChangesInPayDowns	-4076000	usd
CY2021	ibcp	Servicing Asset At Fair Value Changes In Pay Downs ServicingAssetAtFairValueChangesInPayDowns	-5488000	usd
CY2020	ibcp	Servicing Asset At Fair Value Changes In Pay Downs ServicingAssetAtFairValueChangesInPayDowns	-5391000	usd
CY2022Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	42489000	usd
CY2021Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	26232000	usd
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	16904000	usd
CY2022Q4	ibcp	Mortgage Loans On Real Estate Serviced MortgageLoansOnRealEstateServiced	3493312000	usd
CY2021Q4	ibcp	Mortgage Loans On Real Estate Serviced MortgageLoansOnRealEstateServiced	3323521000	usd
CY2020Q4	ibcp	Mortgage Loans On Real Estate Serviced MortgageLoansOnRealEstateServiced	2982833000	usd
CY2021Q4	us-gaap	Foreclosed Assets ForeclosedAssets	200000	usd
CY2022	ibcp	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Average Coupon Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAverageCouponRate	0.0360
CY2022	ibcp	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Average Servicing Fee Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAverageServicingFeeRate	0.0026
CY2022	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.1012
CY2022	ibcp	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate Average Psa Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRateAveragePSARate	133	psarate
CY2021	ibcp	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Average Coupon Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAverageCouponRate	0.0346
CY2021	ibcp	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Average Servicing Fee Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueAverageServicingFeeRate	0.00256
CY2021	us-gaap	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRate	0.1007
CY2021	ibcp	Servicing Assets And Servicing Liabilities At Fair Value Assumptions Used To Estimate Fair Value Discount Rate Average Psa Rate ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueDiscountRateAveragePSARate	232	psarate
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	235000	usd
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	738000	usd
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1715000	usd
CY2022	ibcp	Other Real Estate Acquired Additions OtherRealEstateAcquiredAdditions	719000	usd
CY2021	ibcp	Other Real Estate Acquired Additions OtherRealEstateAcquiredAdditions	253000	usd
CY2020	ibcp	Other Real Estate Acquired Additions OtherRealEstateAcquiredAdditions	332000	usd
CY2022	ibcp	Other Real Estate Acquired Disposals OtherRealEstateAcquiredDisposals	511000	usd
CY2021	ibcp	Other Real Estate Acquired Disposals OtherRealEstateAcquiredDisposals	745000	usd
CY2020	ibcp	Other Real Estate Acquired Disposals OtherRealEstateAcquiredDisposals	1161000	usd
CY2022	ibcp	Other Real Estate Acquired Valuation Adjustments OtherRealEstateAcquiredValuationAdjustments	0	usd
CY2021	ibcp	Other Real Estate Acquired Valuation Adjustments OtherRealEstateAcquiredValuationAdjustments	11000	usd
CY2020	ibcp	Other Real Estate Acquired Valuation Adjustments OtherRealEstateAcquiredValuationAdjustments	148000	usd
CY2022Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	443000	usd
CY2021Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	235000	usd
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	738000	usd
CY2022Q4	us-gaap	Other Foreclosed Assets OtherForeclosedAssets	10000.00	usd
CY2021Q4	us-gaap	Other Foreclosed Assets OtherForeclosedAssets	10000.00	usd
CY2021Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	31000	usd
CY2020Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	90000	usd
CY2019Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	92000	usd
CY2022	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	0	usd
CY2021	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	11000	usd
CY2020	us-gaap	Real Estate Owned Valuation Allowance Provision1 RealEstateOwnedValuationAllowanceProvision1	148000	usd
CY2022	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	31000	usd
CY2021	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	70000	usd
CY2020	us-gaap	Real Estate Owned Valuation Allowance Amounts Applied RealEstateOwnedValuationAllowanceAmountsApplied	150000	usd
CY2022Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	0	usd
CY2021Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	31000	usd
CY2020Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	90000	usd
CY2022	ibcp	Foreclosed Residential Real Estate ForeclosedResidentialRealEstate	400000	usd
CY2021	ibcp	Foreclosed Residential Real Estate ForeclosedResidentialRealEstate	200000	usd
CY2022Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	800000	usd
CY2021Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	600000	usd
CY2022Q4	us-gaap	Foreclosed Assets ForeclosedAssets	500000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	153913000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	151010000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	118020000	usd
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	114606000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	35893000	usd
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	36404000	usd
CY2022	us-gaap	Depreciation Depreciation	5300000	usd
CY2021	us-gaap	Depreciation Depreciation	5400000	usd
CY2020	us-gaap	Depreciation Depreciation	5300000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	11916000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	9365000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	11916000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	8580000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	28300000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	28300000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	800000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1000000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	547000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	516000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	487000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	460000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	434000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	107000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2551000	usd
CY2022	us-gaap	Interest Expense Now Accounts Money Market Accounts And Savings Deposits InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits	6078000	usd
CY2021	us-gaap	Interest Expense Now Accounts Money Market Accounts And Savings Deposits InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits	2101000	usd
CY2020	us-gaap	Interest Expense Now Accounts Money Market Accounts And Savings Deposits InterestExpenseNOWAccountsMoneyMarketAccountsAndSavingsDeposits	2264000	usd
CY2022	ibcp	Interest Expense Deposit Liabilities Reciprocal Deposit InterestExpenseDepositLiabilitiesReciprocalDeposit	4421000	usd
CY2021	ibcp	Interest Expense Deposit Liabilities Reciprocal Deposit InterestExpenseDepositLiabilitiesReciprocalDeposit	764000	usd
CY2020	ibcp	Interest Expense Deposit Liabilities Reciprocal Deposit InterestExpenseDepositLiabilitiesReciprocalDeposit	2158000	usd
CY2022	us-gaap	Interest Expense Domestic Deposit Liabilities Time Deposit InterestExpenseDomesticDepositLiabilitiesTimeDeposit	1902000	usd
CY2021	us-gaap	Interest Expense Domestic Deposit Liabilities Time Deposit InterestExpenseDomesticDepositLiabilitiesTimeDeposit	1507000	usd
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities Time Deposit InterestExpenseDomesticDepositLiabilitiesTimeDeposit	7073000	usd
CY2022	us-gaap	Interest Expense Domestic Deposit Liabilities Brokered InterestExpenseDomesticDepositLiabilitiesBrokered	1750000	usd
CY2021	us-gaap	Interest Expense Domestic Deposit Liabilities Brokered InterestExpenseDomesticDepositLiabilitiesBrokered	93000	usd
CY2020	us-gaap	Interest Expense Domestic Deposit Liabilities Brokered InterestExpenseDomesticDepositLiabilitiesBrokered	1171000	usd
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	14151000	usd
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	4465000	usd
CY2020	us-gaap	Interest Expense Deposits InterestExpenseDeposits	12666000	usd
CY2021Q4	ibcp	Time Deposits Denominations Amount TimeDepositsDenominationsAmount	250000	usd
CY2022Q4	ibcp	Time Deposits Denominations Amount TimeDepositsDenominationsAmount	250000	usd
CY2022Q4	ibcp	Time Deposits250000 Or More TimeDeposits250000OrMore	82900000	usd
CY2021Q4	ibcp	Time Deposits250000 Or More TimeDeposits250000OrMore	93100000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	509639000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	54808000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	6348000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	5791000	usd
CY2022Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	3488000	usd
CY2022Q4	us-gaap	Time Deposit Maturities After Year Five TimeDepositMaturitiesAfterYearFive	147000	usd
CY2022Q4	us-gaap	Time Deposits TimeDeposits	580221000	usd
CY2022Q4	ibcp	Reciprocal Demand Deposits ReciprocalDemandDeposits	554585000	usd
CY2021Q4	ibcp	Reciprocal Demand Deposits ReciprocalDemandDeposits	559664000	usd
CY2022Q4	ibcp	Reciprocal Money Market Deposits ReciprocalMoneyMarketDeposits	1196000	usd
CY2021Q4	ibcp	Reciprocal Money Market Deposits ReciprocalMoneyMarketDeposits	2546000	usd
CY2022Q4	ibcp	Reciprocal Time Deposits ReciprocalTimeDeposits	46794000	usd
CY2021Q4	ibcp	Reciprocal Time Deposits ReciprocalTimeDeposits	24416000	usd
CY2022Q4	ibcp	Reciprocal Deposits ReciprocalDeposits	602575000	usd
CY2021Q4	ibcp	Reciprocal Deposits ReciprocalDeposits	586626000	usd
CY2022Q4	ibcp	Federal Reserve Bank Amount Outstanding At End Of Period FederalReserveBankAmountOutstandingAtEndOfPeriod	61000000	usd
CY2021Q4	ibcp	Federal Reserve Bank Amount Outstanding At End Of Period FederalReserveBankAmountOutstandingAtEndOfPeriod	0	usd
CY2022Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	25000000	usd
CY2021Q4	us-gaap	Advances From Federal Home Loan Banks AdvancesFromFederalHomeLoanBanks	30000000	usd
CY2022Q4	ibcp	Borrowings Borrowings	6000	usd
CY2021Q4	ibcp	Borrowings Borrowings	9000	usd
CY2022Q4	us-gaap	Other Borrowings OtherBorrowings	86006000	usd
CY2021Q4	us-gaap	Other Borrowings OtherBorrowings	30009000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	7900000	usd
CY2022Q4	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Amount Of Available Unused Funds FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds	881300000	usd
CY2022	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	200000	usd
CY2021	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	200000	usd
CY2020	us-gaap	Interest Expense Federal Home Loan Bank And Federal Reserve Bank Advances Long Term InterestExpenseFederalHomeLoanBankAndFederalReserveBankAdvancesLongTerm	500000	usd
CY2022	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	30000000	usd
CY2021	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	0	usd
CY2020	us-gaap	Federal Home Loan Bank Advances General Debt Obligations Disclosures Repayment And Penalties FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresRepaymentAndPenalties	0	usd
CY2022	ibcp	Federal Home Loan Bank Stock As Percentages Of Outstanding Advances FederalHomeLoanBankStockAsPercentagesOfOutstandingAdvances	0.045
CY2022	us-gaap	Interest Expense Federal Funds Purchased InterestExpenseFederalFundsPurchased	0	usd
CY2021	us-gaap	Interest Expense Federal Funds Purchased InterestExpenseFederalFundsPurchased	0	usd
CY2020	us-gaap	Interest Expense Federal Funds Purchased InterestExpenseFederalFundsPurchased	10000.00	usd
CY2022Q4	ibcp	Assets Pledged As Collateral AssetsPledgedAsCollateral	2100000000	usd
CY2021Q4	ibcp	Trust Preferred Securities TrustPreferredSecurities	38400000	usd
CY2022Q4	ibcp	Trust Preferred Securities TrustPreferredSecurities	38400000	usd
CY2022	ibcp	Distribution Deferral Period Subordinated Debentures DistributionDeferralPeriodSubordinatedDebentures	20	q
CY2022	us-gaap	Net Income Loss NetIncomeLoss	63351000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	62895000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	56152000	usd
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21096000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21585000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	21977000	shares
CY2022	ibcp	Stock Units For Deferred Compensation Plan For Non Employee Directors StockUnitsForDeferredCompensationPlanForNonEmployeeDirectors	137000	shares
CY2021	ibcp	Stock Units For Deferred Compensation Plan For Non Employee Directors StockUnitsForDeferredCompensationPlanForNonEmployeeDirectors	121000	shares
CY2020	ibcp	Stock Units For Deferred Compensation Plan For Non Employee Directors StockUnitsForDeferredCompensationPlanForNonEmployeeDirectors	121000	shares
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	38000	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	69000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	90000	shares
CY2022	ibcp	Weighted Average Number Of Performance Shares Stock WeightedAverageNumberOfPerformanceSharesStock	25000	shares
CY2021	ibcp	Weighted Average Number Of Performance Shares Stock WeightedAverageNumberOfPerformanceSharesStock	32000	shares
CY2020	ibcp	Weighted Average Number Of Performance Shares Stock WeightedAverageNumberOfPerformanceSharesStock	33000	shares
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	21296000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	21807000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	22221000	shares
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.00
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.91
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.56
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.97
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.88
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.53
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	14796000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	12506000	usd
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	15459000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-359000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1912000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2130000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14437000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14418000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13329000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	16335000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	16236000	usd
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	14591000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1475000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1487000	usd
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	690000	usd
CY2022	ibcp	Effective Income Tax Rate Reconciliation Share Based Compensation Cost Excess Benefit Deficit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationCostExcessBenefitDeficitAmount	144000	usd
CY2021	ibcp	Effective Income Tax Rate Reconciliation Share Based Compensation Cost Excess Benefit Deficit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationCostExcessBenefitDeficitAmount	184000	usd
CY2020	ibcp	Effective Income Tax Rate Reconciliation Share Based Compensation Cost Excess Benefit Deficit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationCostExcessBenefitDeficitAmount	204000	usd
CY2022	ibcp	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance Income Tax Effect Amount EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsuranceIncomeTaxEffectAmount	140000	usd
CY2021	ibcp	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance Income Tax Effect Amount EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsuranceIncomeTaxEffectAmount	119000	usd
CY2020	ibcp	Effective Income Tax Rate Reconciliation Bank Owned Life Insurance Income Tax Effect Amount EffectiveIncomeTaxRateReconciliationBankOwnedLifeInsuranceIncomeTaxEffectAmount	196000	usd
CY2022	ibcp	Effective Income Tax Rate Reconciliation Low Income Housing Tax Credit Investments Tax Effect EffectiveIncomeTaxRateReconciliationLowIncomeHousingTaxCreditInvestmentsTaxEffect	134000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	734000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	458000	usd
CY2021	ibcp	Effective Income Tax Rate Reconciliation Low Income Housing Tax Credit Investments Tax Effect EffectiveIncomeTaxRateReconciliationLowIncomeHousingTaxCreditInvestmentsTaxEffect	19000	usd
CY2020	ibcp	Effective Income Tax Rate Reconciliation Low Income Housing Tax Credit Investments Tax Effect EffectiveIncomeTaxRateReconciliationLowIncomeHousingTaxCreditInvestmentsTaxEffect	0	usd
CY2022	ibcp	Income Tax Reconciliation Unrecognized Tax Benefits IncomeTaxReconciliationUnrecognizedTaxBenefits	-7000	usd
CY2021	ibcp	Income Tax Reconciliation Unrecognized Tax Benefits IncomeTaxReconciliationUnrecognizedTaxBenefits	-11000	usd
CY2020	ibcp	Income Tax Reconciliation Unrecognized Tax Benefits IncomeTaxReconciliationUnrecognizedTaxBenefits	-206000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Meals And Entertainment IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	30000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Meals And Entertainment IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	32000	usd
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Meals And Entertainment IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	57000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-28000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-30000	usd
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-23000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14437000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14418000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13329000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	18274000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	11011000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	9923000	usd
CY2022Q4	ibcp	Deferred Tax Asset Debt Securities Held To Maturity Transferred From Available For Sale Unrealized Loss DeferredTaxAssetDebtSecuritiesHeldToMaturityTransferredFromAvailableForSaleUnrealizedLoss	4843000	usd
CY2021Q4	ibcp	Deferred Tax Asset Debt Securities Held To Maturity Transferred From Available For Sale Unrealized Loss DeferredTaxAssetDebtSecuritiesHeldToMaturityTransferredFromAvailableForSaleUnrealizedLoss	0	usd
CY2022Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1909000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1405000	usd
CY2022Q4	ibcp	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Incentive Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsIncentiveCompensation	1880000	usd
CY2021Q4	ibcp	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Incentive Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsIncentiveCompensation	0	usd
CY2022Q4	ibcp	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	1211000	usd
CY2021Q4	ibcp	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	1386000	usd
CY2022Q4	ibcp	Deferred Tax Assets Reserve For Unfunded Lending Commitments DeferredTaxAssetsReserveForUnfundedLendingCommitments	1067000	usd
CY2021Q4	ibcp	Deferred Tax Assets Reserve For Unfunded Lending Commitments DeferredTaxAssetsReserveForUnfundedLendingCommitments	941000	usd
CY2022Q4	ibcp	Deferred Tax Asset Securities Premium Amortization DeferredTaxAssetSecuritiesPremiumAmortization	792000	usd
CY2021Q4	ibcp	Deferred Tax Asset Securities Premium Amortization DeferredTaxAssetSecuritiesPremiumAmortization	386000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	764000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	390000	usd
CY2022Q4	ibcp	Deferred Tax Assets Loss Reimbursement On Sold Loans Reserve DeferredTaxAssetsLossReimbursementOnSoldLoansReserve	254000	usd
CY2021Q4	ibcp	Deferred Tax Assets Loss Reimbursement On Sold Loans Reserve DeferredTaxAssetsLossReimbursementOnSoldLoansReserve	242000	usd
CY2022Q4	ibcp	Deferred Tax Assets Other Than Temporary Impairment Charge On Securities Available For Sale DeferredTaxAssetsOtherThanTemporaryImpairmentChargeOnSecuritiesAvailableForSale	144000	usd
CY2021Q4	ibcp	Deferred Tax Assets Other Than Temporary Impairment Charge On Securities Available For Sale DeferredTaxAssetsOtherThanTemporaryImpairmentChargeOnSecuritiesAvailableForSale	144000	usd
CY2022Q4	ibcp	Deferred Tax Assets Non Accrual Loan Interest Income DeferredTaxAssetsNonAccrualLoanInterestIncome	128000	usd
CY2021Q4	ibcp	Deferred Tax Assets Non Accrual Loan Interest Income DeferredTaxAssetsNonAccrualLoanInterestIncome	194000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	42735000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	15745000	usd
CY2022Q4	ibcp	Deferred Tax Liabilities Capitalized Mortgage Loan Servicing Rights DeferredTaxLiabilitiesCapitalizedMortgageLoanServicingRights	8923000	usd
CY2021Q4	ibcp	Deferred Tax Liabilities Capitalized Mortgage Loan Servicing Rights DeferredTaxLiabilitiesCapitalizedMortgageLoanServicingRights	5509000	usd
CY2022Q4	ibcp	Deferred Tax Liabilities Deferred Expense Deferred Loan Origination Fees Costs DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationFeesCosts	2430000	usd
CY2021Q4	ibcp	Deferred Tax Liabilities Deferred Expense Deferred Loan Origination Fees Costs DeferredTaxLiabilitiesDeferredExpenseDeferredLoanOriginationFeesCosts	2011000	usd
CY2022Q4	ibcp	Deferred Tax Liability Lease Right Of Use Asset DeferredTaxLiabilityLeaseRightOfUseAsset	1164000	usd
CY2021Q4	ibcp	Deferred Tax Liability Lease Right Of Use Asset DeferredTaxLiabilityLeaseRightOfUseAsset	1361000	usd
CY2022Q4	ibcp	Deferred Tax Liabilities Purchase Premiums Net DeferredTaxLiabilitiesPurchasePremiumsNet	681000	usd
CY2021Q4	ibcp	Deferred Tax Liabilities Purchase Premiums Net DeferredTaxLiabilitiesPurchasePremiumsNet	735000	usd
CY2022Q4	ibcp	Deferred Tax Liabilities Unrealized Gains On Securities Available For Sale DeferredTaxLiabilitiesUnrealizedGainsOnSecuritiesAvailableForSale	0	usd
CY2021Q4	ibcp	Deferred Tax Liabilities Unrealized Gains On Securities Available For Sale DeferredTaxLiabilitiesUnrealizedGainsOnSecuritiesAvailableForSale	1674000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	42000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	110000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	13240000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	11400000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	29495000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	4345000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	180000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	180000	usd
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	438000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	13000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	11000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	15000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	7000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	11000	usd
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	273000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	186000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	180000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	180000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	40000.00	usd
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	0	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	600000	shares
CY2022Q4	ibcp	Shares Issued On Deferral Basis Credited Percentage Of Current Value SharesIssuedOnDeferralBasisCreditedPercentageOfCurrentValue	0.90
CY2022Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	2300000	usd
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CY2022	ibcp	Employee Stock Ownership Plan Contributions EmployeeStockOwnershipPlanContributions	0.02
CY2020	ibcp	Employee Stock Ownership Plan Contributions EmployeeStockOwnershipPlanContributions	0.02
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2900000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3300000	usd
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3200000	usd
CY2022	ibcp	Incentive Based Compensation Expense IncentiveBasedCompensationExpense	12700000	usd
CY2021	ibcp	Incentive Based Compensation Expense IncentiveBasedCompensationExpense	15600000	usd
CY2020	ibcp	Incentive Based Compensation Expense IncentiveBasedCompensationExpense	15700000	usd
CY2022	ibcp	Employee Compensation Benefit Health Care And Life Insurance Expense EmployeeCompensationBenefitHealthCareAndLifeInsuranceExpense	6200000	usd
CY2021	ibcp	Employee Compensation Benefit Health Care And Life Insurance Expense EmployeeCompensationBenefitHealthCareAndLifeInsuranceExpense	6100000	usd
CY2020	ibcp	Employee Compensation Benefit Health Care And Life Insurance Expense EmployeeCompensationBenefitHealthCareAndLifeInsuranceExpense	4800000	usd
CY2022	ibcp	Investment And Insurance Commissions InvestmentAndInsuranceCommissions	2898000	usd
CY2021	ibcp	Investment And Insurance Commissions InvestmentAndInsuranceCommissions	2603000	usd
CY2020	ibcp	Investment And Insurance Commissions InvestmentAndInsuranceCommissions	1971000	usd
CY2022	ibcp	Fees Atm Cards FeesATMCards	1216000	usd
CY2021	ibcp	Fees Atm Cards FeesATMCards	1133000	usd
CY2020	ibcp	Fees Atm Cards FeesATMCards	1197000	usd
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	360000	usd
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	567000	usd
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	910000	usd
CY2022	ibcp	Other Miscellaneous Non Interest Income OtherMiscellaneousNonInterestIncome	6263000	usd
CY2021	ibcp	Other Miscellaneous Non Interest Income OtherMiscellaneousNonInterestIncome	5089000	usd
CY2020	ibcp	Other Miscellaneous Non Interest Income OtherMiscellaneousNonInterestIncome	3443000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10737000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9392000	usd
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7521000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	39747000	usd
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	12283000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	19127000	usd
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	5961000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	6879000	usd
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	2416000	usd
CY2022	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	1957000	usd
CY2021	us-gaap	Loans And Leases Receivable Related Parties Additions LoansAndLeasesReceivableRelatedPartiesAdditions	5722000	usd
CY2022	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	1094000	usd
CY2021	us-gaap	Loans And Leases Receivable Related Parties Proceeds LoansAndLeasesReceivableRelatedPartiesProceeds	1259000	usd
CY2022Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	7742000	usd
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	6879000	usd
CY2021Q4	ibcp	Loans And Leases Receivable Loan Commitments Related Parties LoansAndLeasesReceivableLoanCommitmentsRelatedParties	1910000	usd
CY2022Q4	ibcp	Loans And Leases Receivable Loan Commitments Related Parties LoansAndLeasesReceivableLoanCommitmentsRelatedParties	1910000	usd
CY2022Q4	ibcp	Loans And Leases Receivable Outstanding Loan Commitments Related Parties LoansAndLeasesReceivableOutstandingLoanCommitmentsRelatedParties	10000.00	usd
CY2021Q4	ibcp	Loans And Leases Receivable Outstanding Loan Commitments Related Parties LoansAndLeasesReceivableOutstandingLoanCommitmentsRelatedParties	20000.00	usd
CY2022Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	2600000	usd
CY2021Q4	us-gaap	Related Party Deposit Liabilities RelatedPartyDepositLiabilities	3400000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	1636000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	1672000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	1780000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	78000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	63000	usd
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	69000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	91000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	64000	usd
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	36000	usd
CY2022	us-gaap	Lease Cost LeaseCost	1805000	usd
CY2021	us-gaap	Lease Cost LeaseCost	1799000	usd
CY2020	us-gaap	Lease Cost LeaseCost	1885000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	5544000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	6481000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	5769000	usd
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	6602000	usd
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y10M9D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y6M
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.024
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.023
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1527000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1026000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	970000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	801000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	637000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1200000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	6161000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	392000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	5769000	usd
CY2022Q4	ibcp	Retained Earnings Accumulated Deficit Subsidiary RetainedEarningsAccumulatedDeficitSubsidiary	137200000	usd
CY2021Q4	us-gaap	Banking Regulation Capital Conservation Buffer Capital Conserved Minimum BankingRegulationCapitalConservationBufferCapitalConservedMinimum	0.0250
CY2022Q4	us-gaap	Banking Regulation Capital Conservation Buffer Capital Conserved Minimum BankingRegulationCapitalConservationBufferCapitalConservedMinimum	0.0250
CY2022	ibcp	Current Expected Credit Loss Transition Method For Regulatory Purpose CurrentExpectedCreditLossTransitionMethodForRegulatoryPurpose	P3Y
CY2022	ibcp	Loans Held For Sale Unrealized Gain Loss LoansHeldForSaleUnrealizedGainLoss	-3393000	usd
CY2022	ibcp	Servicing Asset Unrealized Gain Loss ServicingAssetUnrealizedGainLoss	10196000	usd
CY2021	ibcp	Loans Held For Sale Unrealized Gain Loss LoansHeldForSaleUnrealizedGainLoss	-2805000	usd
CY2021	ibcp	Servicing Asset Unrealized Gain Loss ServicingAssetUnrealizedGainLoss	-2108000	usd
CY2020	ibcp	Loans Held For Sale Unrealized Gain Loss LoansHeldForSaleUnrealizedGainLoss	1962000	usd
CY2020	ibcp	Servicing Asset Unrealized Gain Loss ServicingAssetUnrealizedGainLoss	-16224000	usd
CY2022Q4	ibcp	Collateral Dependent Loans Carrying Amount CollateralDependentLoansCarryingAmount	2200000	usd
CY2022Q4	ibcp	Collateral Dependent Loans Valuation Allowance CollateralDependentLoansValuationAllowance	2100000	usd
CY2021Q4	ibcp	Collateral Dependent Loans Carrying Amount CollateralDependentLoansCarryingAmount	1400000	usd
CY2021Q4	ibcp	Collateral Dependent Loans Valuation Allowance CollateralDependentLoansValuationAllowance	600000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1500000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	300000	usd
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	700000	usd
CY2021Q4	ibcp	Other Real Estate Impaired Net Reserves OtherRealEstateImpairedNetReserves	0	usd
CY2022	ibcp	Number Of Real Estate Assets Sold NumberOfRealEstateAssetsSold	0	asset
CY2021Q4	us-gaap	Real Estate Owned Valuation Allowance RealEstateOwnedValuationAllowance	30000.00	usd
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CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	30000.00	usd
CY2022Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	26518000	usd
CY2022Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	-2342000	usd
CY2022Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	28860000	usd
CY2021Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	55470000	usd
CY2021Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	1051000	usd
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	54419000	usd
CY2020Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	92434000	usd
CY2020Q4	us-gaap	Fair Value Option Aggregate Differences Loans And Long Term Receivables FairValueOptionAggregateDifferencesLoansAndLongTermReceivables	3856000	usd
CY2020Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	88578000	usd
CY2022Q4	ibcp	Reciprocal Deposits Included In Deposits No Stated Maturity ReciprocalDepositsIncludedInDepositsNoStatedMaturity	555781000	usd
CY2021Q4	ibcp	Reciprocal Deposits Included In Deposits No Stated Maturity ReciprocalDepositsIncludedInDepositsNoStatedMaturity	562210000	usd
CY2022Q4	ibcp	Reciprocal Deposits Included In Deposits With Stated Maturity ReciprocalDepositsIncludedInDepositsWithStatedMaturity	46794000	usd
CY2021Q4	ibcp	Reciprocal Deposits Included In Deposits With Stated Maturity ReciprocalDepositsIncludedInDepositsWithStatedMaturity	24416000	usd
CY2022	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-93481000	usd
CY2022	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-217000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-93264000	usd
CY2021	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	-8408000	usd
CY2021	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	1115000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-9523000	usd
CY2020	us-gaap	Oci Before Reclassifications Net Of Tax Attributable To Parent OciBeforeReclassificationsNetOfTaxAttributableToParent	12015000	usd
CY2021	ibcp	Number Of Real Estate Assets Sold NumberOfRealEstateAssetsSold	0	asset
CY2020	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	-1795000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	13810000	usd
CY2022Q4	ibcp	Percentage Of Revenue Excluded From Asu201409 PercentageOfRevenueExcludedFromASU201409	0.841
CY2021Q4	ibcp	Percentage Of Revenue Excluded From Asu201409 PercentageOfRevenueExcludedFromASU201409	0.846
CY2020Q4	ibcp	Percentage Of Revenue Excluded From Asu201409 PercentageOfRevenueExcludedFromASU201409	0.881
CY2022Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0	usd
CY2022Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	0	usd
CY2021Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	0	usd
CY2021Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0	usd
CY2020	ibcp	Number Of Real Estate Assets Sold NumberOfRealEstateAssetsSold	0	asset
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	31643000	usd
CY2022	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	360000	usd
CY2022	ibcp	Noninterest Income Other Operating Income Other NoninterestIncomeOtherOperatingIncomeOther	4977000	usd
CY2022	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	10737000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	29098000	usd
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	567000	usd
CY2021	ibcp	Noninterest Income Other Operating Income Other NoninterestIncomeOtherOperatingIncomeOther	3942000	usd
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	9392000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	24026000	usd
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	910000	usd
CY2020	ibcp	Noninterest Income Other Operating Income Other NoninterestIncomeOtherOperatingIncomeOther	2332000	usd
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	7521000	usd

Files In Submission

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$IBCP
INDEPENDENT BANK CORP /MI/ Stock $ibcp

2023 Q1 Form 10-K Financial Statement

#000003931123000035 Filed on March 03, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IBCP INDEPENDENT BANK CORP /MI/ Stock $ibcp

2023 Q1 Form 10-K Financial Statement

#000003931123000035 Filed on March 03, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IBCP
INDEPENDENT BANK CORP /MI/ Stock $ibcp