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Note 11 - Fair Value of Financial Instruments (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Fair Value, Measurements, Nonrecurring [Member] |  |  |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | $ 0 |  | $ 0 |  | $ 0
Interest Rate Swap [Member] |  |  |  |  |
Fair Value, Option, Changes in Fair Value, Gain (Loss) | 500,000 | $ 2,100,000 | 4,300,000 | $ 1,300,000 |
Financial Liabilites at Fair Value Option Contractual Principal | 61,900,000 |  | 61,900,000 |  | 61,900,000
Financial Liabilities at Fair Value Option Accrued Interest Payable | 100,000 |  | 100,000 |  | 100,000
Financial Assets at Fair Value Option | 30,700,000 |  | 30,700,000 |  | 30,700,000
Financial Liabilities at Fair Value Option | 27,800,000 |  | 27,800,000 |  | $ 29,000,000
Fair Value, Option, Changes in Fair Value, Gain (Loss) | $ (823,000) | $ (1,094,000) | $ (2,925,000) | $ (921,000) |
Fair Value Inputs, Discount Rate |  |  | 85.00% |  |

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- Definition The fair value option of financial assets. + References No definition available. + Details
Name: | ffic_FinancialAssetsAtFairValueOption
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The fair value of the option contractual principal. + References No definition available. + Details
Name: | ffic_FinancialLiabilitesAtFairValueOptionContractualPrincipal
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The fair value option of financial liabilities. + References No definition available. + Details
Name: | ffic_FinancialLiabilitiesAtFairValueOption
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The fair value of the accrued interest payable on the option. + References No definition available. + Details
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Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Details
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- Details
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Period Type: |