2.4.0.8043 - Disclosure - Note 4 - Debt and Equity Securities (Details) - Credit loss component recognized in earnings on debt securities:truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$c20_From1Apr2013To30Jun2013http://www.sec.gov/CIK0000923139duration2013-04-01T00:00:002013-06-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$c21_From1Apr2012To30Jun2012http://www.sec.gov/CIK0000923139duration2012-04-01T00:00:002012-06-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$c22_From1Jan2013To30Jun2013http://www.sec.gov/CIK0000923139duration2013-01-01T00:00:002013-06-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$c23_From1Jan2012To30Jun2012http://www.sec.gov/CIK0000923139duration2012-01-01T00:00:002012-06-30T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1ffic_CreditLossComponentRecognizedInEarningsOnDebtSecuritiesAbstractffic_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Credit loss component recognized in earnings on debt securities: [Abstract]2false 2us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeldus-gaap_truedebitinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse61780006178USD$falsetruefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 false2Balance3false 2ffic_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsRecognitionOfActualLossesffic_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse-488000-488falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryOther Than Temporary Impairment Credit Losses Recognized In Earnings, Reductions, Recognition Of Actual LossesNo definition available.false2Recognition of actual losses4false 2us-gaap_OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecuritiesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsefalse503000503falsefalsefalse2truefalsefalse776000776falsefalsefalse3truefalsefalse503000503falsefalsefalse4truefalsefalse776000776falsefalsefalsexbrli:monetaryItemTypemonetaryThe amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period. Such impairment losses consist of other than temporary impairments (OTTI) on equity securities, credit losses on investments in debt securities, and when the entity intends to sell an impaired debt security or it is more likely than not that the entity will be required to sell the impaired debt security before recovery of its amortized cost basis.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 false2OTTI charges due to credit loss recorded in earnings5false 2us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeldus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse61930006193USD$falsetruefalse2falsefalsefalse00falsefalsefalse3truefalsefalse61930006193USD$falsetruefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 false2BalancefalseNote 4 - Debt and Equity Securities (Details) - Credit loss component recognized in earnings on debt securities: (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://flushingbank.com/role/CreditlosscomponentrecognizedinearningsondebtsecuritiesTable45