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FAIR VALUE MEASUREMENTS (Details 3) (Nonrecurring, USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Fair value      
Total Losses $ 17us-gaap_AssetsFairValueAdjustment $ 77us-gaap_AssetsFairValueAdjustment $ 1,137us-gaap_AssetsFairValueAdjustment
Investments 0us-gaap_InvestmentsFairValueDisclosure    
Impaired loans
      
Fair value      
Total Losses   77us-gaap_AssetsFairValueAdjustment
/ us-gaap_FairValueByAssetClassAxis
= mfnc_ImpairedFinanceReceivablesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		 857us-gaap_AssetsFairValueAdjustment
/ us-gaap_FairValueByAssetClassAxis
= mfnc_ImpairedFinanceReceivablesMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember
Other real estate owned
      
Fair value      
Total Losses $ (17)us-gaap_AssetsFairValueAdjustment
/ us-gaap_FairValueByAssetClassAxis
= mfnc_OtherRealEstateOwnedMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember		   $ 280us-gaap_AssetsFairValueAdjustment
/ us-gaap_FairValueByAssetClassAxis
= mfnc_OtherRealEstateOwnedMember
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsNonrecurringMember