XML 123 R111.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Leases - (Details) | Dec. 31, 2021 item lease
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Number of subleases | item | 1
Minimum [Member] |
Term of contract | 1 month
Maximum [Member] |
Term of contract | 15 years
Branches And Office Space [Member] |
Number of leases | 28
Vehicles [Member] |
Number of leases | 10
Equipment [Member] |
Number of leases | 1

X
- Definition Represents information pertaining to number of leases. + References No definition available. + Details
Name: | ffic_NumberOfLeases
Namespace Prefix: | ffic_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents information pertaining to number of sub leases. + References No definition available. + Details
Name: | ffic_NumberOfSubleases
Namespace Prefix: | ffic_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=ffic_BranchesAndOfficeSpaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |