2.4.0.82408404 - Disclosure - Pension and Other Employee Benefit Plans (Narrative) (Details)truefalsefalse1false USDfalsefalse$D2013Q2YTDhttp://www.sec.gov/CIK0000320387duration2013-01-01T00:00:002013-06-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$D2012Q2YTDhttp://www.sec.gov/CIK0000320387duration2012-01-01T00:00:002012-06-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]2false 4us-gaap_DefinedBenefitPlanContributionsByEmployerus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse216000216000USD$falsetruefalse2truefalsefalse108000108000USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe increase in the fair value of plan assets from contributions made by the employer.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false2Contributions to the ESOP5false 4fmfc_DeferredCompensationArrangementWithIndividualAmountDeferredfmfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse4000040000USD$falsefalsefalse2truefalsefalse4200042000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDeferred Compensation Arrangement with Individual, Amount DeferredNo definition available.false2Nonqualified deferred compensation plan, deferred compensation6false 4us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaidus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2truefalsefalse50005000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of distributions made to the individual during the period.No definition available.false2Nonqualified deferred compensation plan, received distributions7false 4fmfc_DeferredCompensationArrangementWithIndividualIncreaseInCompensationfmfc_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse5300053000USD$falsefalsefalse2truefalsefalse6500065000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryDeferred Compensation Arrangement with Individual, Increase in CompensationNo definition available.false2Nonqualified deferred compensation plan, earnings increases8false 4us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpenseus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse10001000USD$falsefalsefalse2truefalsefalse10001000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe compensation expense recognized during the period pertaining to the deferred compensation arrangement.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64, 65 -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. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 6, 7 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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