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Note 6 - Loans Held for Sale (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014
Loans Held For Sale [Abstract] |  |
Number of Loans Held for Sale | 0 ffic_NumberOfLoansHeldForSale | 0 ffic_NumberOfLoansHeldForSale

X
- Details
Name: | ffic_LoansHeldForSaleAbstract
Namespace Prefix: | ffic_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of loans an entity has held for sale. + References No definition available. + Details
Name: | ffic_NumberOfLoansHeldForSale
Namespace Prefix: | ffic_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration