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GOODWILL AND OTHER INTANGIBLE ASSETS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Goodwill $ 3,805us-gaap_Goodwill $ 3,805us-gaap_Goodwill
Deposit based intangible assets 1,167us-gaap_FiniteLivedIntangibleAssetsNet 1,196us-gaap_FiniteLivedIntangibleAssetsNet
Amortization of Intangible Assets 29us-gaap_AmortizationOfIntangibleAssets  
Amortization expense year one 121us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
Amortization expense year two 121us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
Amortization expense year three 121us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
Amortization expense year four 121us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
Amortization expense year five 121us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Peninsula Financial Corporation    
Goodwill   3,805us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= mfnc_PeninsulaFinancialCorporationMember
Deposit based intangible assets   $ 1,206us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_BusinessAcquisitionAxis
= mfnc_PeninsulaFinancialCorporationMember
Estimated life 10 years 10 years