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