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Note 18 - Fair Value of Financial Instruments (Details) - Carrying Amounts and Estimated Fair Values of Selected Financial Instruments as Well as Assumptions Used in Estimating Fair Value (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Assets: |  |
Carrying Amount, Assets | $ 5,077,013 us-gaap_Assets | $ 4,721,501 us-gaap_Assets
Liabilities: |  |
Carrying Amount, Liabilities | 4,620,766 us-gaap_Liabilities | 4,288,969 us-gaap_Liabilities
Borrowings [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Liabilities: |  |
Fair Value, Liabilities | 1,041,657 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByLiabilityClassAxis = us-gaap_BorrowingsMember | 1,005,229 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByLiabilityClassAxis = us-gaap_BorrowingsMember
Borrowings [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Liabilities: |  |
Fair Value, Liabilities | 28,771 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = us-gaap_BorrowingsMember | 29,570 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = us-gaap_BorrowingsMember
Borrowings [Member] |  |
Liabilities: |  |
Carrying Amount, Liabilities | 1,056,492 us-gaap_Liabilities / us-gaap_FairValueByLiabilityClassAxis = us-gaap_BorrowingsMember | 1,012,122 us-gaap_Liabilities / us-gaap_FairValueByLiabilityClassAxis = us-gaap_BorrowingsMember
Fair Value, Liabilities | 1,070,428 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = us-gaap_BorrowingsMember | 1,034,799 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = us-gaap_BorrowingsMember
Interest Rate Swaps [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Liabilities: |  |
Fair Value, Liabilities | 2,649 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByLiabilityClassAxis = ffic_InterestRateSwapsMember |
Interest Rate Swaps [Member] |  |
Liabilities: |  |
Carrying Amount, Liabilities | 2,649 us-gaap_Liabilities / us-gaap_FairValueByLiabilityClassAxis = ffic_InterestRateSwapsMember |
Fair Value, Liabilities | 2,649 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = ffic_InterestRateSwapsMember |
Total Liabilities - Financial Instruments [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Liabilities: |  |
Fair Value, Liabilities | 2,202,775 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember | 2,111,825 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember
Total Liabilities - Financial Instruments [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Liabilities: |  |
Fair Value, Liabilities | 2,365,654 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember | 2,146,665 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember
Total Liabilities - Financial Instruments [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Liabilities: |  |
Fair Value, Liabilities | 28,771 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember | 29,570 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember
Total Liabilities - Financial Instruments [Member] |  |
Liabilities: |  |
Carrying Amount, Liabilities | 4,567,739 us-gaap_Liabilities / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember | 4,244,902 us-gaap_Liabilities / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember
Fair Value, Liabilities | 4,597,200 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember | 4,288,060 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByLiabilityClassAxis = ffic_TotalLiabilitiesFinancialInstrumentsMember
Deposits [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Liabilities: |  |
Fair Value, Liabilities | 2,202,775 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 2,111,825 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Deposits [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Liabilities: |  |
Fair Value, Liabilities | 1,321,348 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 1,141,436 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Deposits [Member] |  |
Liabilities: |  |
Carrying Amount, Liabilities | 3,508,598 us-gaap_Liabilities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember | 3,232,780 us-gaap_Liabilities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember
Fair Value, Liabilities | 3,524,123 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember | 3,253,261 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_DepositsMember
Fair Value, Inputs, Level 1 [Member] | Cash And Due From Banks [Member] |  |
Assets: |  |
Fair Value, Assets | 34,265 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_CashAndDueFromBanksMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 33,485 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_CashAndDueFromBanksMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 1 [Member] | Total Assets - Financial Instruments [Member] |  |
Assets: |  |
Fair Value, Assets | 34,265 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 33,485 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member] |  |
Assets: |  |
Fair Value, Assets | 704,933 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 756,156 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 2 [Member] | Other Securities [Member] |  |
Assets: |  |
Fair Value, Assets | 245,768 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 237,476 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 2 [Member] | FHLB - NY Stock [Member] |  |
Assets: |  |
Fair Value, Assets | 46,924 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_FHLBNYStockMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 46,025 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_FHLBNYStockMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swaps [Member] |  |
Assets: |  |
Fair Value, Assets | 84 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_InterestRateSwapsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 2,081 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_InterestRateSwapsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 2 [Member] | Total Assets - Financial Instruments [Member] |  |
Assets: |  |
Fair Value, Assets | 997,709 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 1,041,738 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Fair Value, Inputs, Level 3 [Member] | Other Securities [Member] |  |
Assets: |  |
Fair Value, Assets | 22,609 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 24,158 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 [Member] | Loans [Member] |  |
Assets: |  |
Fair Value, Assets | 3,871,087 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_LoansBalanceSheetLocationMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 3,502,792 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_LoansBalanceSheetLocationMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member] |  |
Assets: |  |
Fair Value, Assets | 6,326 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherRealEstateOwnedMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 2,985 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherRealEstateOwnedMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 [Member] | Total Assets - Financial Instruments [Member] |  |
Assets: |  |
Fair Value, Assets | 3,900,022 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 3,530,360 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Fair Value, Inputs, Level 3 [Member] | Loans Held For Sale [Member] |  |
Assets: |  |
Fair Value, Assets |  | 425 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_LoansHeldForSaleMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Cash And Due From Banks [Member] |  |
Assets: |  |
Carrying Amount, Assets | 34,265 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_CashAndDueFromBanksMember | 33,485 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_CashAndDueFromBanksMember
Fair Value, Assets | 34,265 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_CashAndDueFromBanksMember | 33,485 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_CashAndDueFromBanksMember
Collateralized Mortgage Backed Securities [Member] |  |
Assets: |  |
Carrying Amount, Assets | 704,933 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesMember | 756,156 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesMember
Fair Value, Assets | 704,933 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesMember | 756,156 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = us-gaap_MortgageBackedSecuritiesMember
Other Securities [Member] |  |
Assets: |  |
Carrying Amount, Assets | 268,377 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_OtherSecuritiesMember | 261,634 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_OtherSecuritiesMember
Fair Value, Assets | 268,377 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherSecuritiesMember | 261,634 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherSecuritiesMember
Loans [Member] |  |
Assets: |  |
Carrying Amount, Assets | 3,810,373 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_LoansBalanceSheetLocationMember | 3,434,178 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_LoansBalanceSheetLocationMember
Fair Value, Assets | 3,871,087 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_LoansBalanceSheetLocationMember | 3,502,792 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_LoansBalanceSheetLocationMember
FHLB - NY Stock [Member] |  |
Assets: |  |
Carrying Amount, Assets | 46,924 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_FHLBNYStockMember | 46,025 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_FHLBNYStockMember
Fair Value, Assets | 46,924 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_FHLBNYStockMember | 46,025 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_FHLBNYStockMember
Interest Rate Swaps [Member] |  |
Assets: |  |
Carrying Amount, Assets | 84 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_InterestRateSwapsMember | 2,081 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_InterestRateSwapsMember
Fair Value, Assets | 84 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_InterestRateSwapsMember | 2,081 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_InterestRateSwapsMember
Other Real Estate Owned [Member] |  |
Assets: |  |
Carrying Amount, Assets | 6,326 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_OtherRealEstateOwnedMember | 2,985 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_OtherRealEstateOwnedMember
Fair Value, Assets | 6,326 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherRealEstateOwnedMember | 2,985 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_OtherRealEstateOwnedMember
Total Assets - Financial Instruments [Member] |  |
Assets: |  |
Carrying Amount, Assets | 4,871,282 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember | 4,536,969 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember
Fair Value, Assets | 4,931,996 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember | 4,605,583 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_TotalAssetsFinancialInstrumentsMember
Loans Held For Sale [Member] |  |
Assets: |  |
Carrying Amount, Assets |  | 425 us-gaap_Assets / us-gaap_FairValueByAssetClassAxis = ffic_LoansHeldForSaleMember
Fair Value, Assets |  | $ 425 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByAssetClassAxis = ffic_LoansHeldForSaleMember

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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