Commitments and Contingent Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Commitments to extend credit
Off-Balance Sheet Risks [Abstract]
Financial instruments whose risk is represented by contract amounts	$ 811,957	$ 672,693
Standby letters of credit
Off-Balance Sheet Risks [Abstract]
Financial instruments whose risk is represented by contract amounts	$ 8,371	$ 9,208

The contract value of financial standby letters of credit, which are not recognized in the financial statements (off-balance sheet).

No definition available.

Name:	ibcp_ContractDisclosureOffBalanceSheetRisksAmount
Namespace Prefix:	ibcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant