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Note 14 - Regulatory Capital (Details) - Summary of the Bank’s Compliance with Banking Regulatory Capital Standards: (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Savings Bank [Member] |  |
Tier I (leverage) capital: |  |
Capital level | $ 472,251 us-gaap_TierOneLeverageCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | $ 447,305 us-gaap_TierOneLeverageCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Capital level | 9.63%us-gaap_TierOneLeverageCapitalToAverageAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 9.48%us-gaap_TierOneLeverageCapitalToAverageAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Requirement to be well capitalized | 245,254 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 235,992 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Requirement to be well capitalized | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Excess | 226,997 us-gaap_ExcessTierOneLeverageCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 211,313 us-gaap_ExcessTierOneLeverageCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Excess | 4.63%us-gaap_ExcessTierOneLeverageCapitalToAverageAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 4.48%us-gaap_ExcessTierOneLeverageCapitalToAverageAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Tier I risk-based capital: |  |
Capital level | 472,251 us-gaap_TierOneRiskBasedCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 447,305 us-gaap_TierOneRiskBasedCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Capital level | 13.87%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 14.59%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Requirement to be well capitalized | 204,354 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 183,944 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Requirement to be well capitalized | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Excess | 267,897 us-gaap_ExcessTierOneRiskBasedCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 263,361 us-gaap_ExcessTierOneRiskBasedCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Excess | 7.87%us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 8.59%us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Total risk-based capital: |  |
Capital level | 497,347 us-gaap_Capital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 479,081 us-gaap_Capital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Capital level | 14.60%us-gaap_CapitalToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 15.63%us-gaap_CapitalToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Requirement to be well capitalized | 340,589 us-gaap_CapitalRequiredToBeWellCapitalized / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 306,573 us-gaap_CapitalRequiredToBeWellCapitalized / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Requirement to be well capitalized | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Excess | 156,758 us-gaap_ExcessCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 172,508 us-gaap_ExcessCapital / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Excess | 4.60%us-gaap_ExcessCapitalToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember | 5.63%us-gaap_ExcessCapitalToRiskWeightedAssets / us-gaap_StatementBusinessSegmentsAxis = ffic_SavingsBankMember
Holding Company [Member] |  |
Tier I (leverage) capital: |  |
Capital level | 471,233 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 456,772 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Capital level | 9.62%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 9.70%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Requirement to be well capitalized | 244,960 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 235,547 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Requirement to be well capitalized | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Excess | 226,273 us-gaap_ExcessTierOneLeverageCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 221,225 us-gaap_ExcessTierOneLeverageCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Excess | 4.62%us-gaap_ExcessTierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 4.70%us-gaap_ExcessTierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Tier I risk-based capital: |  |
Capital level | 471,233 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 456,772 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Capital level | 13.87%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 14.93%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Requirement to be well capitalized | 203,878 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 183,579 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Requirement to be well capitalized | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Excess | 267,355 us-gaap_ExcessTierOneRiskBasedCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 273,193 us-gaap_ExcessTierOneRiskBasedCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Excess | 7.87%us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 8.93%us-gaap_ExcessTierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Total risk-based capital: |  |
Capital level | 496,329 us-gaap_Capital / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 488,548 us-gaap_Capital / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Capital level | 14.61%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 15.97%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Requirement to be well capitalized | 339,797 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 305,966 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Requirement to be well capitalized | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Excess | $ 156,532 us-gaap_ExcessCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember | $ 182,582 us-gaap_ExcessCapital / dei_LegalEntityAxis = ffic_HoldingCompanyMember
Excess | 4.61%us-gaap_ExcessCapitalToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember | 5.97%us-gaap_ExcessCapitalToRiskWeightedAssets / dei_LegalEntityAxis = ffic_HoldingCompanyMember

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- Definition The amount of total capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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- Definition The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Total Capital divided by risk weighted assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount by which the company's Total Capital exceeds the minimum required for capital adequacy purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount of excess Total Capital divided by risk weighted assets which are assets that are weighted for credit risk according to a formula used by the Reserve Bank. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 + Details
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- Definition The amount by which the company's Tier 1 Leverage Capital exceeds the minimum required for capital adequacy purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount of excess Tier 1 Leverage Capital divided by average assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount by which the company's Tier 1 Risk Based Capital exceeds the minimum required for capital adequacy purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount of excess Tier 1 Risk Based Capital (which consists of the types of financial capital considered the most reliable and liquid, primarily Shareholders' equity. Examples of Tier 1 capital are common stock or unit, preferred stock or unit that is irredeemable and noncumulative, and retained earnings) divided by risk-weighted assets which are assets that are weighted for credit risk according to a formula used by the Reserve Bank. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 Leverage Capital divided by average assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 Risk Based Capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 capital divided by risk weighted assets as defined by regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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