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Period of time the maturity date of a troubled debt restructured loan is extended for.

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.

No definition available.

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Period of time an interest rate is modified for in a troubled debt restructuring.

No definition available.

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Period of time an interest rate is modified for in a troubled debt restructuring in certain circumstances.

No definition available.

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- References

No definition available.

Name:	ibcp_LoansClassifiedAsTroubledDebtRestructuringsAbstract
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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.

No definition available.

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Data Type:	xbrli:durationItemType
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Disclosure of troubled debt restructurings.

No definition available.

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- 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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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=121611835&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=121599337&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=121611835&loc=SL6953676-111524

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

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Amount, before troubled debt restructuring, of financing receivable to be modified.

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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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Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
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Data Type:	na
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Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ibcp_CommercialRealEstateLoanMember
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Namespace Prefix:
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