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Note 16 - Concentration of Credit Risk (Details) $ in Millions | Dec. 31, 2015 USD ($)
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Risks and Uncertainties [Abstract] |
Lending Limit to Single Borrower | $ 74.2
Largest Aggregate Amount of Loans to Single Borrower | $ 65.5

X
- Definition Largest aggregate amount of loans to a single borrower. + References No definition available. + Details
Name: | ffic_LargestAggregateAmountOfLoansToSingleBorrower
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents lending limit to a single borrower. + References No definition available. + Details
Name: | ffic_LendingLimitToSingleBorrower
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_RisksAndUncertaintiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration