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v3.20.4

Fair Value of Financial Instruments (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Financial Assets at Fair Value Option | $ 14,500 | $ 14,300 |
Financial Liabilities at Fair Value Option | 43,100 | 44,400 |
Fair Value, Option, Changes in Fair Value, Gain (Loss) | (2,142) | (5,353) | $ (4,122)
Financial Liabilities at Fair Value Option Contractual Principal | 61,900 | 61,900 |
Financial Liabilities at Fair Value Option Accrued Interest Payable | 100 | 200 |
Fair Value, Assets, Level 2 to Level 1 Transfers, Amount | $ 0 | 0 |
Appraised Value of Property [Member] |  |  |
Collateral Dependent Loans Measurement Input | 0.85 |  |
Fair Value, Measurements, Nonrecurring [Member] |  |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | $ 0 | 0 |
Interest Rate Swaps [Member] |  |  |
Fair Value, Option, Changes in Fair Value, Gain (Loss) | $ (2,300) | $ (3,000) | $ 900

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- Definition Represents the collateral dependent loans measurement input. + References No definition available. + Details
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Balance Type: | na
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- Definition The fair value option of financial assets. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition The fair value option of financial liabilities. + References No definition available. + Details
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Namespace Prefix: | ffic_
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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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- Definition The fair value of the option contractual principal. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Amount of transfers of assets measured on a recurring basis out of Level 2 of the fair value hierarchy into Level 1. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=117815213&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 + Details
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Period Type: | duration

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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Details
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- Details
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