v3.26.1
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year) (Details) - EBP 002 - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Plan number 002  
Number of shares held   2,221,481
Notes Receivable from Participants $ 1,402  
Total $ 133,604  
Investment, Identifier [Axis]: Ameriprise Retirement Services, Columbia Div Income Ms Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:AmeripriseRetirementServicesMember  
Investment type Common Collective Trust  
Current Value $ 7,094  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Columbia, Columbia Sc Idx Instl 3 Mutual Fund    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:ColumbiaMember  
Investment type Mutual Funds  
Current Value $ 1,871  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Empower Annuity Insurance Company, Am Cent Mid Cap Value Pooled Separate Accounts    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:EmpowerAnnuityInsuranceCompanyMember  
Investment type Pooled Separate Accounts  
Current Value $ 2,041  
Investment party in interest true  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Empower Annuity Insurance Company, Guaranteed Income Fund    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:EmpowerAnnuityInsuranceCompanyMember  
Investment type us-gaap-ebp:EmployeeBenefitPlanTraditionalGuaranteedInvestmentContractMember  
Current Value $ 12,113  
Investment party in interest true  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Empower Annuity Insurance Company, Lcg Jp Morgan Inv Mgmt Pooled Separate Accounts    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:EmpowerAnnuityInsuranceCompanyMember  
Investment type Pooled Separate Accounts  
Current Value $ 11,252  
Investment party in interest true  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Empower Annuity Insurance Company, Pgim Fund High Yield Bond Pooled Separate Accounts    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:EmpowerAnnuityInsuranceCompanyMember  
Investment type Pooled Separate Accounts  
Current Value $ 660  
Investment party in interest true  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Empower Annuity Insurance Company, Prudential Total Return Bond (ISP) Pooled Separate Accounts    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:EmpowerAnnuityInsuranceCompanyMember  
Investment type Pooled Separate Accounts  
Current Value $ 4,068  
Investment party in interest true  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Empower Annuity Insurance Company, Real Estate / Cohen amp; Steers Pooled Separate Accounts    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:EmpowerAnnuityInsuranceCompanyMember  
Investment type Pooled Separate Accounts  
Current Value $ 165  
Investment party in interest true  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Fidelity, Fidelity 500 Index Fund Mutual Fund    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:FidelityMember  
Investment type Mutual Funds  
Current Value $ 23,116  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Flushing Financial Corporation Common Stock    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:FlushingFinancialCorporationMember  
Investment type Company Stock  
Current Value $ 35,183  
Investment party in interest true  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: GQG Partners, GQG Partners Em Mkts Rqty Inst Mutual Fund    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GqgPartnersMember  
Investment type Mutual Funds  
Current Value $ 142  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Geneva Small Cap Grwth Collect FD CL C Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 2,280  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2020 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 1,244  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2025 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 1,989  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2030 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 5,738  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2035 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 3,426  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2040 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 3,765  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2045 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 2,074  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2050 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 1,659  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2055 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 716  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2060 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 488  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt 2065 Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 144  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Great Gray, Pgim Tgt Income Fund Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:GreatGrayMember  
Investment type Common Collective Trust  
Current Value $ 787  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: Hartford Schroder Funds, Schroder Intl Alpha 1 Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:HartfordSchroderFundsMember  
Investment type Common Collective Trust  
Current Value $ 4,229  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: JP Morgan, Undiscovered Managers Behavioral Value Fund Class R6 Mutual Fund    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:JpMorganMember  
Investment type Mutual Funds  
Current Value $ 2,092  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: MFS, MFS Mid Cap Gro Class R6 Mutual Fund    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:MfsMember  
Investment type Mutual Funds  
Current Value $ 3,490  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Investment, Identifier [Axis]: PIMCO, PIMCO Real Rtn Fd Inst Mutual Fund    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Investment issuer name ffic:PimcoMember  
Investment type Mutual Funds  
Current Value $ 376  
Investment participation status us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember  
Company Stock    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Number of shares held 2,319,215  
Current Value $ 35,183  
Mutual Funds    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Current Value 31,087  
Pooled Separate Accounts    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Current Value 18,186  
Common Collective Trust    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Current Value $ 35,633  
Minimum    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Notes Receivable from Participants, interest rate 4.25% 4.25%
Maximum    
Schedule H (Form 5500), line 4i - Schedule of Assets (Held at End of Year)    
Notes Receivable from Participants, interest rate 9.50% 9.50%