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COMMITMENTS, CONTINGENCIES, AND CREDIT RISK (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Financial Instruments with Off-Balance-Sheet Risk      
Commitments $ 74,080us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability $ 77,664us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability $ 63,756us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability
Commitments to extend credit      
Financial Instruments with Off-Balance-Sheet Risk      
Commitments, variable rate 42,690mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtVariableRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
44,134mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtVariableRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
40,704mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtVariableRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Commitments, fixed rate 21,713mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtFixedRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
24,191mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtFixedRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
14,377mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtFixedRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_CommitmentsToExtendCreditMember
Standby letters of credit      
Financial Instruments with Off-Balance-Sheet Risk      
Commitments, variable rate 6,310mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtVariableRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_StandbyLettersOfCreditMember
6,072mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtVariableRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_StandbyLettersOfCreditMember
5,396mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtVariableRate
/ us-gaap_FinancialInstrumentAxis
= us-gaap_StandbyLettersOfCreditMember
Percentage collateralization on financial instruments allowed under commitments 100.00%mfnc_FairValueDisclosureOffBalanceSheetRisksPercentageCollateralizationOnFinancialInstrumentPermittedUnderCommitments
/ us-gaap_FinancialInstrumentAxis
= us-gaap_StandbyLettersOfCreditMember
   
Credit card commitments      
Financial Instruments with Off-Balance-Sheet Risk      
Commitments, fixed rate $ 3,367mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtFixedRate
/ us-gaap_FinancialInstrumentAxis
= mfnc_CreditCardCommitmentsMember
$ 3,267mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtFixedRate
/ us-gaap_FinancialInstrumentAxis
= mfnc_CreditCardCommitmentsMember
$ 3,279mfnc_FairValueDisclosureOffBalanceSheetRisksAmountLiabilityAtFixedRate
/ us-gaap_FinancialInstrumentAxis
= mfnc_CreditCardCommitmentsMember