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Amount of direct write-downs of receivables charged against the allowance for doubtful accounts due to TDR's that subsequently defaulted.

No definition available.

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Period of time the maturity date of a troubled debt restructured loan is extended for, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

No definition available.

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Period of time the maturity date of a troubled debt restructured loan is extended for in certain circumstances, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

No definition available.

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Period of time an interest rate is modified for in a troubled debt restructuring, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

No definition available.

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Period of time an interest rate is modified for in a troubled debt restructuring in certain circumstances, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

No definition available.

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- References

No definition available.

Name:	ibcp_LoansClassifiedAsTroubledDebtRestructuringsAbstract
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Number of consecutive payments for mortgage loans and the borrower's capacity to repay the loan and collateral values appear insufficient for each loan class.

No definition available.

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The number of consecutive timely payments required to be received for non-accrual loans to be removed from inclusion with the non-performing troubled debt restructurings.

No definition available.

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The period when loan payment is considered to be in default, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

No definition available.

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Disclosure of troubled debt restructurings.

No definition available.

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Period Type:	instant

- References

No definition available.

Name:	ibcp_TroubledDebtRestructuringAbstract
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Specific allowance for loan and lease losses on receivable financings that are classified as troubled debt restructurings.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Amount of increase (decrease) of allowance reserve for credit loss.

No definition available.

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Amount of increase (decrease) in allowance for credit loss on financing receivable.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

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Number of financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

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Data Type:	xbrli:monetaryItemType
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Amount, before troubled debt restructuring, of financing receivable to be modified.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Reflects the amount of the write-down related to a troubled debt restructuring.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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