2.4.0.84041 - Disclosure - Loans Receivable (Financing Receivables) and Allowance for Loan Losses (Details 2)truefalsefalse1false USDfalsefalse$D2013Q2http://www.sec.gov/CIK0000946090duration2013-04-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$D2012Q2http://www.sec.gov/CIK0000946090duration2012-04-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$D2013Q2YTDhttp://www.sec.gov/CIK0000946090duration2013-01-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$D2012Q2YTDhttp://www.sec.gov/CIK0000946090duration2012-01-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 2us-gaap_LoansAndLeasesReceivableOtherInformationAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Transferred Loans, Loan Balance2false 3fmar_LoansTransferredToHeldToMaturityPortfoliofmar_falsedebitinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse1833500018335000USD$falsetruefalse2truefalsefalse1211700012117000USD$falsetruefalse3truefalsefalse1750100017501000USD$falsetruefalse4truefalsefalse1400800014008000USD$falsetruefalsexbrli:monetaryItemTypemonetaryCarrying value at the balance sheet date of loans transferred held-to-maturity portfolio.No definition available.false2Beginning balance3false 3fmar_LoansTransferredDuringPeriodToHeldToMaturityPortfoliofmar_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse64470006447000falsefalsefalse2truefalsefalse226000226000falsefalsefalse3truefalsefalse72810007281000falsefalsefalse4truefalsefalse342000342000falsefalsefalsexbrli:monetaryItemTypemonetaryValue of loans transferred during the reporting period to held-to-maturity portfolio.No definition available.false2Loans transferred4false 3fmar_LoansTransferredToHeldToMaturityPortfolioChargedOfffmar_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-213000-213000falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse-285000-285000falsefalsefalsexbrli:monetaryItemTypemonetaryValue of loans transferred to held-to-maturity portfolio charged-off during the period.No definition available.false2Charge-offs5false 3fmar_LoansTransferredToHeldToMaturityPortfolioPaymentsOrAccretionfmar_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-5525000-5525000falsefalsefalse2truefalsefalse-1257000-1257000falsefalsefalse3truefalsefalse-5525000-5525000falsefalsefalse4truefalsefalse-3192000-3192000falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the value of loans transferred to held-to-maturity portfolio, payments or accretion.No definition available.false2Payments/accretion6false 3fmar_LoansTransferredToHeldToMaturityPortfoliofmar_falsedebitinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse1925700019257000falsefalsefalse2truefalsefalse1087300010873000falsefalsefalse3truefalsefalse1925700019257000falsefalsefalse4truefalsefalse1087300010873000falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying value at the balance sheet date of loans transferred held-to-maturity portfolio.No definition available.false2Ending balance7true 2us-gaap_BankingAndThriftInterestAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Accretable Yield8false 3fmar_LoansTransferredToHeldToMaturityPortfolioAccretableYieldfmar_falsedebitinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse208000208000falsefalsefalse2truefalsefalse4700047000falsefalsefalse3truefalsefalse220000220000falsefalsefalse4truefalsefalse266000266000falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying value at the balance sheet date of accretable yield of loans transferred to held-to-maturity portfolio.No definition available.false2Beginning balance9false 3fmar_LoansTransferredToHeldToMaturityPortfolioChargedOffAccretableYieldfmar_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-6000-6000falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse-14000-14000falsefalsefalsexbrli:monetaryItemTypemonetaryAccretable yield of loans transferred to held-to-maturity portfolio charged-off during the period.No definition available.false2Charge-offs10false 3fmar_AccretableYieldOfLoansTransferredToHeldToMaturityPortfolioPaymentsOrAccretionfmar_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-64000-64000falsefalsefalse2truefalsefalse-5000-5000falsefalsefalse3truefalsefalse-76000-76000falsefalsefalse4truefalsefalse-216000-216000falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the accretable yield of loans transferred to held-to-maturity portfolio, payments or accretion.No definition available.false2Payments/accretion11false 3fmar_LoansTransferredToHeldToMaturityPortfolioAccretableYieldfmar_falsedebitinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse144000144000falsefalsefalse2truefalsefalse3600036000falsefalsefalse3truefalsefalse144000144000falsefalsefalse4truefalsefalse3600036000falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying value at the balance sheet date of accretable yield of loans transferred to held-to-maturity portfolio.No definition available.false2Ending balance12true 2us-gaap_LoansAndLeasesReceivableNetReportedAmountAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Total13false 3fmar_LoansTransferredToHeldToMaturityPortfolioAfterAccretableYieldfmar_falsedebitinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse1812700018127000falsefalsefalse2truefalsefalse1207000012070000falsefalsefalse3truefalsefalse1728100017281000falsefalsefalse4truefalsefalse1374200013742000falsefalsefalsexbrli:monetaryItemTypemonetaryTotal carrying value at the balance sheet date of loans transferred to held-to-maturity portfolio after accretable yield.No definition available.false2Beginning balance14false 3fmar_LoansTransferredDuringPeriodToHeldToMaturityPortfolioAfterAccretableYieldfmar_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse64470006447000falsefalsefalse2truefalsefalse226000226000falsefalsefalse3truefalsefalse72810007281000falsefalsefalse4truefalsefalse342000342000falsefalsefalsexbrli:monetaryItemTypemonetaryTotal value of loans transferred during the reporting period to held-to-maturity portfolio after accretable yield.No definition available.false2Loans transferred15false 3fmar_LoansTransferredToHeldToMaturityPortfolioChargedOffAfterAccretableYieldfmar_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-207000-207000falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse-271000-271000falsefalsefalsexbrli:monetaryItemTypemonetaryTotal value of loans transferred to held-to-maturity portfolio charged-off during the period after accretable yield.No definition available.false2Charge-offs16false 3fmar_LoansTransferredToHeldToMaturityPortfolioPaymentsOrAccretionAfterAccretableYieldfmar_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-5461000-5461000falsefalsefalse2truefalsefalse-1252000-1252000falsefalsefalse3truefalsefalse-5449000-5449000falsefalsefalse4truefalsefalse-2976000-2976000falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the total value of loans transferred to held-to-maturity portfolio, payments or accretion after accretable yield.No definition available.false2Payments/accretion17false 3fmar_LoansTransferredToHeldToMaturityPortfolioAfterAccretableYieldfmar_falsedebitinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse1911300019113000falsefalsefalse2truefalsefalse1083700010837000falsefalsefalse3truefalsefalse1911300019113000falsefalsefalse4truefalsefalse1083700010837000falsefalsefalsexbrli:monetaryItemTypemonetaryTotal carrying value at the balance sheet date of loans transferred to held-to-maturity portfolio after accretable yield.No definition available.false2Ending balance18false 2us-gaap_LoansPledgedAsCollateralus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse9630000096300000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse9630000096300000USD$falsetruefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying amount as of the balance sheet date of loans that have been pledged as collateral for borrowings. If the secured party has the right by contract or custom to sell or re-pledge the collateral, then the debtor reclassifies that asset and report that asset in its statement of financial position separately from other assets not so encumbered.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5086-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 15 -Subparagraph a -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. false2Carrying value of loans pledged as collateral for FHLB advancesfalseLoans Receivable (Financing Receivables) and Allowance for Loan Losses (Details 2) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.1stmarinerbank.com/role/DisclosureLoansReceivableFinancingReceivablesAndAllowanceForLoanLossesDetails2418