Note 8 - Deposits (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Note 8 - Deposits (Details) [Line Items]
Interest-bearing Domestic Deposit, Brokered	$ 763,900,000	$ 517,400,000
Time Deposits, $250,000 or More	109,600,000ffic_TimeDeposits250000OrMore	75,600,000ffic_TimeDeposits250000OrMore
Deposits	3,508,598,000us-gaap_Deposits	3,232,780,000us-gaap_Deposits
ICS Deposits [Member] \| Government Deposits [Member]
Note 8 - Deposits (Details) [Line Items]
Deposits	94,000,000
Collateralized Deposits [Member] \| Government Deposits [Member]
Note 8 - Deposits (Details) [Line Items]
Deposits	797,900,000
Securities Pledged as Collateral [Member] \| Government Deposits [Member]
Note 8 - Deposits (Details) [Line Items]
Deposit Liabilities, Collateral Issued, Financial Instruments	379,300,000	407,400,000
Letter of Credit Pledged as Collateral [Member] \| Government Deposits [Member]
Note 8 - Deposits (Details) [Line Items]
Deposit Liabilities, Collateral Issued, Financial Instruments	499,100,000	517,800,000
Letter of Credit Pledged as Collateral [Member]
Note 8 - Deposits (Details) [Line Items]
Deposit Liabilities, Collateral Issued, Financial Instruments	499,100,000
Government Deposits [Member]
Note 8 - Deposits (Details) [Line Items]
Deposits		867,100,000
Denomination [Member]
Note 8 - Deposits (Details) [Line Items]
Interest-bearing Domestic Deposit, Brokered	1,000.00	1,000.00
Government Deposits [Member]
Note 8 - Deposits (Details) [Line Items]
Deposits	$ 891,900,000

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The aggregate amount of domestic and foreign time deposit liabilities (including certificates of deposits, individual retirement accounts and open accounts) in denominations of $250,000 or more.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 405

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6479006&loc=d3e64164-112818

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.12)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 9

+ Details

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- Definition

Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities.

+ References

+ Details

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- Details

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- Details

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- Details

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