XML 86 R75.htm IDEA: XBRL DOCUMENT v3.25.3

Fair Value Disclosures - Schedule of Fair Value Option, Disclosures (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings [Abstract]
Loans held for sale	$ 38	$ 215
Capitalized mortgage loan servicing rights	(4,984)	(4,995)
Mortgage Loans
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings [Abstract]
Loans held for sale	38	215
Mortgage Loan Servicing, net
Fair Value, Assets and Liabilities Measured on Recurring Basis, Gain (Loss) Included in Earnings [Abstract]
Capitalized mortgage loan servicing rights	$ (4,984)	$ (4,995)

X

- Definition

Amount of unrealized gain (loss) on loans held for sale measured at fair value with change in fair value recognized in net income.

+ References

No definition available.

+ Details

Name:	ibcp_LoansHeldForSaleUnrealizedGainLoss
Namespace Prefix:	ibcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of unrealized gain (loss) on capitalized servicing rights measured at fair value with change in fair value recognized in net income.

+ References

No definition available.

+ Details

Name:	ibcp_ServicingAssetUnrealizedGainLoss
Namespace Prefix:	ibcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisGainLossIncludedInEarningsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=ibcp_Family14Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=ibcp_CapitalizedMortgageLoanServicingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: