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Note 22 - Parent Company Only Financial Information (Details) - Condensed Statements of Financial Condition for the Holding Company: (Parentheticals) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Condensed Balance Sheet Statements, Captions [Line Items]    
Other securities, at fair value pursuant to fair value option $ 27,915ffic_AvailableForSaleSecuritiesOtherFairValueOption $ 30,163ffic_AvailableForSaleSecuritiesOtherFairValueOption
Treasury stock, shares 2,126,772us-gaap_TreasuryStockShares 1,407,343us-gaap_TreasuryStockShares
Holding Company [Member]    
Condensed Balance Sheet Statements, Captions [Line Items]    
Other securities, at fair value pursuant to fair value option $ 864ffic_AvailableForSaleSecuritiesOtherFairValueOption
/ dei_LegalEntityAxis
= ffic_HoldingCompanyMember
$ 2,562ffic_AvailableForSaleSecuritiesOtherFairValueOption
/ dei_LegalEntityAxis
= ffic_HoldingCompanyMember
Treasury stock, shares 2,126,772us-gaap_TreasuryStockShares
/ dei_LegalEntityAxis
= ffic_HoldingCompanyMember
1,407,343us-gaap_TreasuryStockShares
/ dei_LegalEntityAxis
= ffic_HoldingCompanyMember