Annual report pursuant to Section 13 and 15(d)

FEDERAL INCOME TAXES (Details)

v2.4.1.9
FEDERAL INCOME TAXES (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income tax expense (benefit) [Abstract]      
Current $ 1,724,000us-gaap_CurrentIncomeTaxExpenseBenefit $ 120,000us-gaap_CurrentIncomeTaxExpenseBenefit $ 275,000us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred 2,849,000us-gaap_DeferredIncomeTaxExpenseBenefit 4,150,000us-gaap_DeferredIncomeTaxExpenseBenefit 0us-gaap_DeferredIncomeTaxExpenseBenefit
Valuation allowance - change in estimate 0us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 0us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount (18,858,000)us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Income tax expense (benefit) 4,573,000us-gaap_IncomeTaxExpenseBenefit 4,270,000us-gaap_IncomeTaxExpenseBenefit (18,583,000)us-gaap_IncomeTaxExpenseBenefit
Difference between financial statement tax expense (benefit) and amount computed by applying statutory federal tax rate to pretax income [Abstract]      
Statutory rate (in hundredths) 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Statutory rate applied to income before taxes 5,266,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate 4,837,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate 5,917,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Add (deduct) [Abstract]      
Change in valuation allowance 0us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 0us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance (24,026,000)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Tax-exempt interest income (391,000)us-gaap_IncomeTaxReconciliationTaxExemptIncome (244,000)us-gaap_IncomeTaxReconciliationTaxExemptIncome (103,000)us-gaap_IncomeTaxReconciliationTaxExemptIncome
Bank-owned life insurance (237,000)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance (250,000)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance (297,000)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance
Other, net (65,000)us-gaap_IncomeTaxReconciliationOtherReconcilingItems (73,000)us-gaap_IncomeTaxReconciliationOtherReconcilingItems (74,000)us-gaap_IncomeTaxReconciliationOtherReconcilingItems
Income tax expense (benefit) 4,573,000us-gaap_IncomeTaxExpenseBenefit 4,270,000us-gaap_IncomeTaxExpenseBenefit (18,583,000)us-gaap_IncomeTaxExpenseBenefit
Valuation allowance on deferred tax assets 0us-gaap_DeferredTaxAssetsValuationAllowance 0us-gaap_DeferredTaxAssetsValuationAllowance 0us-gaap_DeferredTaxAssetsValuationAllowance
Deferred tax assets [Abstract]      
Allowance for loan losses 6,637,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses 7,279,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses  
Nonaccrual loan interest 935,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves 782,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves  
Valuation allowance on other real estate owned 5,190,000mcbc_DeferredTaxAssetsValuationAllowanceOnOtherRealEstateOwned 5,847,000mcbc_DeferredTaxAssetsValuationAllowanceOnOtherRealEstateOwned  
Net operating loss carryforward 0us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 1,743,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards  
Unrealized loss on securities available for sale 0us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross 1,053,000us-gaap_DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross  
Other 1,896,000us-gaap_DeferredTaxAssetsOther 1,808,000us-gaap_DeferredTaxAssetsOther  
Gross deferred tax assets 14,658,000us-gaap_DeferredTaxAssetsGross 18,512,000us-gaap_DeferredTaxAssetsGross  
Valuation allowance 0us-gaap_DeferredTaxAssetsValuationAllowance 0us-gaap_DeferredTaxAssetsValuationAllowance 0us-gaap_DeferredTaxAssetsValuationAllowance
Total net deferred tax assets 14,658,000us-gaap_DeferredTaxAssetsNet 18,512,000us-gaap_DeferredTaxAssetsNet  
Deferred tax liabilities [Abstract]      
Depreciation (1,908,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (1,620,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment  
Unrealized gain on securities available for sale (33,000)us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome 0us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome  
Prepaid expenses (21,000)us-gaap_DeferredTaxLiabilitiesPrepaidExpenses (308,000)us-gaap_DeferredTaxLiabilitiesPrepaidExpenses  
Other (431,000)us-gaap_DeferredTaxLiabilitiesOther (384,000)us-gaap_DeferredTaxLiabilitiesOther  
Gross deferred tax liabilities (2,393,000)us-gaap_DeferredTaxLiabilities (2,312,000)us-gaap_DeferredTaxLiabilities  
Net deferred tax asset 12,265,000us-gaap_DeferredTaxAssetsLiabilitiesNet 16,200,000us-gaap_DeferredTaxAssetsLiabilitiesNet  
Unrecognized tax benefits $ 0us-gaap_UnrecognizedTaxBenefits $ 0us-gaap_UnrecognizedTaxBenefits  
Period when unrecognized tax benefits is not expected to significantly increase or decrease 12 months