XML 45 R36.htm IDEA: XBRL DOCUMENT v2.4.1.9
Loans (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Analysis of allowance for loan losses by portfolio segment [Roll Forward]      
Balance at beginning of period $ 25,990us-gaap_FinancingReceivableAllowanceForCreditLosses $ 32,325us-gaap_FinancingReceivableAllowanceForCreditLosses  
Additions (deductions) [Abstract]      
Provision for loan losses (659)us-gaap_ProvisionForLoanAndLeaseLosses 428us-gaap_ProvisionForLoanAndLeaseLosses  
Recoveries credited to allowance 990us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery 1,068us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery  
Loans charged against the allowance (1,642)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs (3,384)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs  
Balance at end of period 24,679us-gaap_FinancingReceivableAllowanceForCreditLosses 30,437us-gaap_FinancingReceivableAllowanceForCreditLosses  
Allowance for loan losses [Abstract]      
Total ending allowance balance 24,679us-gaap_LoansAndLeasesReceivableAllowance   25,990us-gaap_LoansAndLeasesReceivableAllowance
Loans [Abstract]      
Total Loans 1,422,959us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome   1,409,962us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Classified by Portfolio Segment [Member]      
Allowance for loan losses [Abstract]      
Individually evaluated for impairment 12,480us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   13,233us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 12,199us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   12,757us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total ending allowance balance 24,679us-gaap_LoansAndLeasesReceivableAllowance
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   25,990us-gaap_LoansAndLeasesReceivableAllowance
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Loans [Abstract]      
Individually evaluated for impairment 109,572us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   113,166us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 1,317,795us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   1,301,250us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total loans recorded investment 1,427,367ibcp_LoansAndLeasesReceivableRecordedInvestment
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   1,414,416ibcp_LoansAndLeasesReceivableRecordedInvestment
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Accrued interest included in recorded investment 4,408ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   4,454ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total Loans 1,422,959us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   1,409,962us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Commercial [Member]      
Analysis of allowance for loan losses by portfolio segment [Roll Forward]      
Balance at beginning of period 5,445us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 6,827us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Additions (deductions) [Abstract]      
Provision for loan losses 328us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 507us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Recoveries credited to allowance 433us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 355us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Loans charged against the allowance (290)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 (1,926)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Balance at end of period 5,916us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 5,763us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Commercial [Member] | Classified by Portfolio Segment [Member]      
Allowance for loan losses [Abstract]      
Individually evaluated for impairment 3,214us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   3,194us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 2,702us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   2,251us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total ending allowance balance 5,916us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   5,445us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Loans [Abstract]      
Individually evaluated for impairment 32,633us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   34,147us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 679,319us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   658,423us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total loans recorded investment 711,952ibcp_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   692,570ibcp_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Accrued interest included in recorded investment 1,629ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   1,615ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total Loans 710,323us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   690,955us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Mortgage [Member]      
Analysis of allowance for loan losses by portfolio segment [Roll Forward]      
Balance at beginning of period 13,444us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 17,195us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Additions (deductions) [Abstract]      
Provision for loan losses (733)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 193us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Recoveries credited to allowance 238us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 458us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Loans charged against the allowance (868)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 (846)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Balance at end of period 12,081us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 17,000us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Loans [Abstract]      
Accrued interest included in recorded investment 2,122ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 [1]   2,170ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 [1]
Mortgage [Member] | Classified by Portfolio Segment [Member]      
Allowance for loan losses [Abstract]      
Individually evaluated for impairment 8,612us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   9,311us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 3,469us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   4,133us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total ending allowance balance 12,081us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   13,444us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Loans [Abstract]      
Individually evaluated for impairment 70,478us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   72,340us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 397,551us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   402,458us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total loans recorded investment 468,029ibcp_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   474,798ibcp_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Accrued interest included in recorded investment 2,122ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   2,170ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total Loans 465,907us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   472,628us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Installment [Member]      
Analysis of allowance for loan losses by portfolio segment [Roll Forward]      
Balance at beginning of period 1,814us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		 2,246us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		  
Additions (deductions) [Abstract]      
Provision for loan losses (85)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		 176us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		  
Recoveries credited to allowance 319us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		 251us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		  
Loans charged against the allowance (484)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		 (612)us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		  
Balance at end of period 1,564us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		 2,061us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		  
Loans [Abstract]      
Accrued interest included in recorded investment 657ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		 [1]   669ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember		 [1]
Installment [Member] | Classified by Portfolio Segment [Member]      
Allowance for loan losses [Abstract]      
Individually evaluated for impairment 654us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   728us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 910us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   1,086us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total ending allowance balance 1,564us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   1,814us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Loans [Abstract]      
Individually evaluated for impairment 6,461us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   6,679us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 202,158us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   200,368us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total loans recorded investment 208,619ibcp_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   207,047ibcp_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Accrued interest included in recorded investment 657ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   669ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total Loans 207,962us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   206,378us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_InstallmentPortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Payment Plan Receivable [Member]      
Analysis of allowance for loan losses by portfolio segment [Roll Forward]      
Balance at beginning of period 64us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		 97us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		  
Additions (deductions) [Abstract]      
Provision for loan losses (2)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		 (14)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		  
Recoveries credited to allowance 0us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		 4us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		  
Loans charged against the allowance 0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		 0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		  
Balance at end of period 62us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		 87us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember		  
Payment Plan Receivable [Member] | Classified by Portfolio Segment [Member]      
Allowance for loan losses [Abstract]      
Individually evaluated for impairment 0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 62us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   64us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total ending allowance balance 62us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   64us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Loans [Abstract]      
Individually evaluated for impairment 0us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   0us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 38,767us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   40,001us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total loans recorded investment 38,767ibcp_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   40,001ibcp_LoansAndLeasesReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Accrued interest included in recorded investment 0ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   0ibcp_AccruedInterestIncludedInRecordedInInvestmentInLoans
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total Loans 38,767us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   40,001us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= ibcp_PaymentPlanReceivablePortfolioSegmentMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Unallocated [Member]      
Analysis of allowance for loan losses by portfolio segment [Roll Forward]      
Balance at beginning of period 5,223us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		 5,960us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		  
Additions (deductions) [Abstract]      
Provision for loan losses (167)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		 (434)us-gaap_ProvisionForLoanAndLeaseLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		  
Recoveries credited to allowance 0us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		 0us-gaap_FinancingReceivableAllowanceForCreditLossesRecovery
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		  
Loans charged against the allowance 0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		 0us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		  
Balance at end of period 5,056us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		 5,526us-gaap_FinancingReceivableAllowanceForCreditLosses
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember		  
Unallocated [Member] | Classified by Portfolio Segment [Member]      
Allowance for loan losses [Abstract]      
Individually evaluated for impairment 0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   0us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Collectively evaluated for impairment 5,056us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   5,223us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
Total ending allowance balance $ 5,056us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember		   $ 5,223us-gaap_LoansAndLeasesReceivableAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_UnallocatedFinancingReceivablesMember
/ ibcp_FinancingReceivableRecordedInvestmentClassifiedBySegmentAxis
= ibcp_ClassifiedByPortfolioSegmentMember
[1] Credit scores have been updated within the last twelve months.