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Note 1 - Nature of Operations (Details) | 12 Months Ended
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Dec. 31, 2014
Disclosure Text Block [Abstract] |
Number of Merged Entities | 2 ffic_NumberOfMergedEntities

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- Definition Number of entities merged as a result of business combination. + References No definition available. + Details
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Namespace Prefix: | ffic_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DisclosureTextBlockAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration