XML 91 R76.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Securities - Available for Sale Securities With Gross Unrealized Losses and Their Fair Value (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | ---
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 4 | 4
Held-to-maturity securities have been in a continuous unrealized loss position, fair value |  | $ 62,550
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 65,755 |
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | (12,261)
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (8,255) |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 62,550
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | $ (12,261)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 65,755 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (8,255) |
Securities have been in a continuous unrealized loss position, number of positions | 166 | 166
Securities have been in a continuous unrealized loss position, fair value | $ 702,778 | $ 718,869
Securities have been in a continuous unrealized loss position, unrealized losses | (83,020) | (91,529)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 33,856 | 322,133
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (1,360) | (18,711)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 668,922 | 396,736
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (81,660) | $ (72,818)
Other Debt Obligations |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 3 | 3
Held-to-maturity securities have been in a continuous unrealized loss position, fair value |  | $ 55,561
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 58,697 |
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | (11,375)
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (7,458) |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 55,561
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | $ (11,375)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 58,697 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (7,458) |
Securities have been in a continuous unrealized loss position, number of positions | 51 | 46
Securities have been in a continuous unrealized loss position, fair value | $ 350,575 | $ 335,100
Securities have been in a continuous unrealized loss position, unrealized losses | (19,358) | (21,489)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 27,945 | 218,024
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (1,325) | (8,986)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 322,630 | 117,076
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (18,033) | $ (12,503)
US States and Political Subdivisions Debt Securities [Member] |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 3 | 3
Held-to-maturity securities have been in a continuous unrealized loss position, fair value |  | $ 55,561
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 58,697 |
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | (11,375)
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (7,458) |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 55,561
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | $ (11,375)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 58,697 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (7,458) |
US Government Agencies Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 8 | 7
Securities have been in a continuous unrealized loss position, fair value | $ 74,517 | $ 77,856
Securities have been in a continuous unrealized loss position, unrealized losses | (937) | (2,619)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 2,517 | 77,059
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (7) | (2,517)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 72,000 | 797
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (930) | $ (102)
Corporate Debt Securities [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 26 | 20
Securities have been in a continuous unrealized loss position, fair value | $ 155,449 | $ 131,766
Securities have been in a continuous unrealized loss position, unrealized losses | (17,735) | (14,664)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 25,428 | 45,447
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (1,318) | (3,553)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 130,021 | 86,319
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (16,417) | $ (11,111)
Collateralized Loan Obligations [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 17 | 19
Securities have been in a continuous unrealized loss position, fair value | $ 120,609 | $ 125,478
Securities have been in a continuous unrealized loss position, unrealized losses | (686) | (4,206)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 95,518
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | (2,916)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 120,609 | 29,960
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (686) | $ (1,290)
Collateralized Mortgage Backed Securities |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 1 | 1
Held-to-maturity securities have been in a continuous unrealized loss position, fair value |  | $ 6,989
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 7,058 |
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | (886)
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (797) |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 6,989
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | $ (886)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 7,058 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (797) |
Securities have been in a continuous unrealized loss position, number of positions | 115 | 120
Securities have been in a continuous unrealized loss position, fair value | $ 352,203 | $ 383,769
Securities have been in a continuous unrealized loss position, unrealized losses | (63,662) | (70,040)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 5,911 | 104,109
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (35) | (9,725)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 346,292 | 279,660
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (63,627) | $ (60,315)
REMIC and CMO [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 46 | 47
Securities have been in a continuous unrealized loss position, fair value | $ 133,312 | $ 148,120
Securities have been in a continuous unrealized loss position, unrealized losses | (26,591) | (27,298)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 40,911
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | (3,457)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 133,312 | 107,209
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (26,591) | $ (23,841)
GNMA [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 7 | 8
Securities have been in a continuous unrealized loss position, fair value | $ 10,466 | $ 7,133
Securities have been in a continuous unrealized loss position, unrealized losses | (1,740) | (1,879)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 3,867 | 64
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (34) |
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 6,599 | 7,069
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (1,706) | $ (1,879)
FNMA [Member] |  |
Held-to-maturity securities have been in a continuous unrealized loss position, number of positions | 1 | 1
Held-to-maturity securities have been in a continuous unrealized loss position, fair value |  | $ 6,989
Held-to-maturity securities have been in a continuous unrealized loss position, fair value | $ 7,058 |
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss |  | (886)
Held-to-maturity securities have been in a continuous unrealized loss position, unrealized loss | (797) |
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, fair value |  | 6,989
Held-to-maturity securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses |  | $ (886)
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, fair value | 7,058 |
Held-to-maturity securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (797) |
Securities have been in a continuous unrealized loss position, number of positions | 44 | 47
Securities have been in a continuous unrealized loss position, fair value | $ 133,394 | $ 148,229
Securities have been in a continuous unrealized loss position, unrealized losses | (20,935) | (24,425)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 2,044 | 38,296
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | (1) | (3,871)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 131,350 | 109,933
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (20,934) | $ (20,554)
FHLMC [Member] |  |
Securities have been in a continuous unrealized loss position, number of positions | 18 | 18
Securities have been in a continuous unrealized loss position, fair value | $ 75,031 | $ 80,287
Securities have been in a continuous unrealized loss position, unrealized losses | (14,396) | (16,438)
Securities have been in a continuous unrealized loss position, less than 12 months, fair value | 0 | 24,838
Securities have been in a continuous unrealized loss position, less than 12 months, unrealized losses | 0 | (2,397)
Securities have been in a continuous unrealized loss position, 12 months or more, fair value | 75,031 | 55,449
Securities have been in a continuous unrealized loss position, 12 months or more, unrealized losses | $ (14,396) | $ (14,041)

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer. + References No definition available. + Details
Name: | ffic_DebtSecuritiesHeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References No definition available. + Details
Name: | ffic_DebtSecuritiesHeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References No definition available. + Details
Name: | ffic_DebtSecuritiesHeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for 12 months or longer. + References No definition available. + Details
Name: | ffic_DebtSecuritiesHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
Namespace Prefix: | ffic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-5 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479081/326-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-4 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-7 + Details
Name: | us-gaap_HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Disclosure regarding factors used to determine that the impairment of securities categorized as held-to-maturity where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the held-to-maturity investments determined to be temporarily impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-6 + Details
Name: | us-gaap_HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentAgenciesDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedLoanObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ffic_REMICAndCMOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ffic_GNMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ffic_FNMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=ffic_FHLMCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |