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COMMITMENTS, CONTINGENCIES, AND CREDIT RISK (Details 2) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Concentration of Credit Risk      
Loan portfolio $ 592,204us-gaap_LoansAndLeasesReceivableNetReportedAmount $ 480,979us-gaap_LoansAndLeasesReceivableNetReportedAmount $ 595,795us-gaap_LoansAndLeasesReceivableNetReportedAmount
Commercial real estate loans      
Concentration of Credit Risk      
Loan portfolio 308,154us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstateMember		 265,397us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstateMember		 312,574us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstateMember
Bank | Commercial real estate loans | Commercial loan portfolio | Credit risk concentration      
Concentration of Credit Risk      
Loan portfolio $ 106,286us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstateMember
/ dei_LegalEntityAxis
= mfnc_MBankMember		 $ 97,153us-gaap_LoansAndLeasesReceivableNetReportedAmount
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstateMember
/ dei_LegalEntityAxis
= mfnc_MBankMember		  
Percentage of concentration risk under a specified benchmark 24.81%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstateMember
/ dei_LegalEntityAxis
= mfnc_MBankMember		 26.89%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_CommercialPortfolioSegmentMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CreditConcentrationRiskMember
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstateMember
/ dei_LegalEntityAxis
= mfnc_MBankMember