2.4.0.84072 - Disclosure - STOCK COMPENSATION PLANS (Details 3)truefalsefalse1false USDfalsefalse$D2012Q3_M08_RestrictedStockUnitsRSUMemberhttp://www.sec.gov/CIK0000036506duration2012-08-01T00:00:002012-08-31T00:00:00SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse1false USDtruefalse$D2012Q3_M08_RestrictedStockUnitsRSUMemberhttp://www.sec.gov/CIK0000036506duration2012-08-01T00:00:002012-08-31T00:00:00falsefalseRestricted Stock Unitsus-gaap_AwardTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RestrictedStockUnitsRSUMemberus-gaap_AwardTypeAxisexplicitMemberSharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Restricted Stock Units2true 3us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Stock Compensation Plans3false 4us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse148500148500falsefalsefalsexbrli:sharesItemTypesharesThe number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false1Number of RSUs granted (in shares)4false 4mfnc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodTotalMarketValuemfnc_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse7.917.91USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe total market value of equity-based awards during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.No definition available.false2Market value of granted stock (in dollars per unit)5false 4mfnc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardTermmfnc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse004 yearsfalsefalsefalsexbrli:durationItemTypenaThe term of equity instruments other than options, which may be presented in a variety of ways.No definition available.false0Vesting term of restricted stock unitsfalseSTOCK COMPENSATION PLANS (Details 3) (Restricted Stock Units, USD $)NoRoundingNoRoundingUnKnownUnKnowntruefalsefalseSheethttp://www.bankmbank.com/role/DisclosureStockCompensationPlansDetails315