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Note 10 - Fair Value of Financial Instruments (Details) - Quantitative Information About Non-Recurring Level 3 Fair Value of Financial Instruments and the Fair Value Measurements (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Municipal [Member] | Minimum [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Discount rate | 0.40%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 0.20%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Discount rate | (0.40%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MinimumMember | (0.20%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Liabilities: |  |
Discount rate | 0.40%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 0.20%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Discount rate | (0.40%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MinimumMember | (0.20%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Municipal [Member] | Maximum [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Discount rate | 4.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 4.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Discount rate | (4.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MaximumMember | (4.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Liabilities: |  |
Discount rate | 4.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 4.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Discount rate | (4.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MaximumMember | (4.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Municipal [Member] | Weighted Average [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Discount rate | 2.50%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 2.30%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Discount rate | (2.50%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | (2.30%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Liabilities: |  |
Discount rate | 2.50%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 2.30%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Discount rate | (2.50%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | (2.30%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Municipal [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Fair value (in Dollars) | 14,464 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember | 15,519 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember
Assets: |  |
Fair value (in Dollars) | 14,464 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember | 15,519 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_MunicipalMember
Trust Preferred Securities [Member] | Minimum [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Discount rate | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Discount rate | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Liabilities: |  |
Discount rate | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Discount rate | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MinimumMember
Trust Preferred Securities [Member] | Maximum [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Discount rate | 7.10%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 7.25%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Discount rate | (7.10%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | (7.25%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Liabilities: |  |
Discount rate | 7.10%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 7.25%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Discount rate | (7.10%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember | (7.25%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Trust Preferred Securities [Member] | Weighted Average [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Discount rate | 7.10%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 7.20%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Discount rate | (7.10%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | (7.20%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Liabilities: |  |
Discount rate | 7.10%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 7.20%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Discount rate | (7.10%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | (7.20%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Trust Preferred Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Fair value (in Dollars) | 7,189 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember | 7,090 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember
Assets: |  |
Fair value (in Dollars) | 7,189 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember | 7,090 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_TrustPreferredSecuritiesMember
Junior Subordinated Debentures [Member] | Weighted Average [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Discount rate | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Discount rate | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Liabilities: |  |
Discount rate | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Discount rate | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember
Junior Subordinated Debentures [Member] | Fair Value, Measurements, Recurring [Member] |  |
Assets: |  |
Discount rate | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember
Discount rate | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember
Liabilities: |  |
Fair value (in Dollars) | 28,244 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember | 28,771 us-gaap_LiabilitiesFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember
Discount rate | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember | 7.00%us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember
Discount rate | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember | (7.00%)us-gaap_FairValueInputsDiscountRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsRecurringMember / us-gaap_FinancialInstrumentAxis = ffic_JuniorSubordinatedDebenturesMember
Impaired Loans [Member] | Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 7.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 7.30%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Capitalization rate | (7.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (7.30%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | 0.50%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 0.50%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | (0.50%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (0.50%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Impaired Loans [Member] | Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 8.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 8.50%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Capitalization rate | (8.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (8.50%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | 83.70%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 81.70%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | (83.70%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (81.70%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Impaired Loans [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 7.70%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 7.80%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Capitalization rate | (7.70%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (7.80%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | 18.10%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 21.30%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | (18.10%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (21.30%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Impaired Loans [Member] | Income Approach Valuation Technique [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Fair value (in Dollars) | 4,937 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 6,981 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Assets: |  |
Fair value (in Dollars) | 4,937 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 6,981 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Impaired Loans [Member] | Sales Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Loss severity discount | 2.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 1.80%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Loss severity discount | (2.00%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | (1.80%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Adjustment to sales comparison value to reconcile differences between comparable sales | (50.00%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | (41.50%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Impaired Loans [Member] | Sales Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Loss severity discount | 97.10%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 89.40%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Loss severity discount | (97.10%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | (89.40%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Adjustment to sales comparison value to reconcile differences between comparable sales | 40.00%us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 40.00%us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Impaired Loans [Member] | Sales Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Loss severity discount | 17.10%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 20.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Loss severity discount | (17.10%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | (20.00%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Impaired Loans [Member] | Sales Approach Valuation Technique [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Fair value (in Dollars) | 5,552 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 6,935 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Assets: |  |
Fair value (in Dollars) | 5,552 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 6,935 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Impaired Loans [Member] | Blended Income and Sales Approach [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 5.60%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 5.80%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Capitalization rate | (5.60%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (5.80%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | 0.90%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 0.90%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | (0.90%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (0.90%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Adjustment to sales comparison value to reconcile differences between comparable sales | (50.00%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (55.00%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Impaired Loans [Member] | Blended Income and Sales Approach [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 11.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 11.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Capitalization rate | (11.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (11.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | 74.80%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 74.40%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | (74.80%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (74.40%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Adjustment to sales comparison value to reconcile differences between comparable sales | 25.00%us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 25.00%us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Impaired Loans [Member] | Blended Income and Sales Approach [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 7.70%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 8.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Capitalization rate | (7.70%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (8.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | 23.60%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 30.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | (23.60%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (30.00%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Impaired Loans [Member] | Blended Income and Sales Approach [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Fair value (in Dollars) | 7,143 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 8,258 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Assets: |  |
Fair value (in Dollars) | 7,143 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 8,258 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_ImpairedLoansMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Other Real Estate Owned [Member] | Income Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 9.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 9.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Capitalization rate | (9.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (9.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | 0.90%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 0.90%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | (0.90%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (0.90%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Other Real Estate Owned [Member] | Income Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 12.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 12.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Capitalization rate | (12.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (12.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | 4.90%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 4.90%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | (4.90%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (4.90%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Other Real Estate Owned [Member] | Income Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 9.10%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 9.10%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Capitalization rate | (9.10%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (9.10%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | 1.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 1.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Loss severity discount | (1.00%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | (1.00%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Other Real Estate Owned [Member] | Income Approach Valuation Technique [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Fair value (in Dollars) | 4,768 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 4,768 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Assets: |  |
Fair value (in Dollars) | 4,768 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember | 4,768 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_ValuationTechniqueAxis = us-gaap_IncomeApproachValuationTechniqueMember
Other Real Estate Owned [Member] | Sales Approach Valuation Technique [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Loss severity discount | 46.10%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 0.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Loss severity discount | (46.10%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 0.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Adjustment to sales comparison value to reconcile differences between comparable sales | (41.50%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | (11.90%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Other Real Estate Owned [Member] | Sales Approach Valuation Technique [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Loss severity discount | 46.10%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 36.90%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Loss severity discount | (46.10%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | (36.90%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Adjustment to sales comparison value to reconcile differences between comparable sales | (23.70%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 15.00%us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Other Real Estate Owned [Member] | Sales Approach Valuation Technique [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Loss severity discount | 46.10%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 9.60%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Loss severity discount | (46.10%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | (9.60%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Other Real Estate Owned [Member] | Sales Approach Valuation Technique [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Fair value (in Dollars) | 94 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 587 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Assets: |  |
Fair value (in Dollars) | 94 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember | 587 us-gaap_AssetsFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_ValuationTechniqueAxis = ffic_SalesApproachValuationTechniqueMember
Other Real Estate Owned [Member] | Blended Income and Sales Approach [Member] | Minimum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 8.50%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 7.50%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Capitalization rate | (8.50%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (7.50%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | 0.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 0.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | 0.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 0.00%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Adjustment to sales comparison value to reconcile differences between comparable sales | (55.00%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (25.00%)us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Other Real Estate Owned [Member] | Blended Income and Sales Approach [Member] | Maximum [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 9.20%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 8.00%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Capitalization rate | (9.20%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (8.00%)us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | 23.90%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 6.20%us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Loss severity discount | (23.90%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | (6.20%)us-gaap_FairValueInputsLossSeverity / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Adjustment to sales comparison value to reconcile differences between comparable sales | 5.00%us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 0.00%us-gaap_FairValueInputsComparabilityAdjustments / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
Other Real Estate Owned [Member] | Blended Income and Sales Approach [Member] | Weighted Average [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |
Assets: |  |
Capitalization rate | 8.70%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember | 7.70%us-gaap_FairValueInputsCapRate / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_FinancialInstrumentAxis = ffic_OtherRealEstateOwnedMember / us-gaap_RangeAxis = us-gaap_WeightedAverageMember / us-gaap_ValuationTechniqueAxis = ffic_BlendedIncomeAndSalesApproachMember
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Assets: |  |
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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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