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Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	12 Months Ended
	Jun. 30, 2007	Jul. 31, 2007	Dec. 31, 2015	Dec. 31, 2014
Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) [Line Items]
Advances Outstanding, Collateral Agreement, Collateralized Percentage			110.00%
Capital Securities [Member] | Flushing Financial Capital Trust II [Member]
Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) [Line Items]
Proceeds from Issuance of Debt	$ 20,600
Capital Securities [Member] | Flushing Financial's Capital Trusts [Member]
Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) [Line Items]
Proceeds from Issuance of Debt	20,600	$ 61,900
Capital Securities [Member] | Flushing Financial Capital Trust III [Member]
Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) [Line Items]
Proceeds from Issuance of Debt	$ 20,600
Unsecured Line of Credit [Member]
Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) [Line Items]
Long-term Line of Credit			$ 60,000
Federal Home Loan Bank of New York [Member]
Note 9 - Borrowed Funds and Securities Sold Under Agreements to Repurchase (Details) [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Repayment and Penalties			$ 80,000
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate			3.46%	4.41%
Extended Average Maturity without Prepayment Penalty			2 years 109 days
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available			$ 2,478,800
Advances from Federal Home Loan Banks			$ 1,106,658	$ 911,721
Proceeds from (Payments for) in Securities Sold under Agreements to Repurchase				$ (30,000)
Securities Sold Under Agreements to Repurchase Prepayments Weighted Average Interest Rate				4.98%
Prepayment Penalty on Advances				$ 2,700
Securities Sold Under Agreements to Repurchase Excluding Prepayments Weighted Average Interest Rate				3.40%

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- Definition

Represents the percentage of advances outstanding which must be collateralized pursuant to the collateral agreement.

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The extended maturity on advances as a result of modification without incurring a prepayment penalty.

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The prepayment penalty on securities sold under agreements to repurchase.

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The weighted average interest rate on securities sold under agreements to repurchase, excluding prepayments.

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The weighted average interest rate on prepayments of securities sold under agreements to repurchase.

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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-Publisher FASB
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-SubTopic 470
-Section 45
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Discloses the single interest rate [if] applicable to the advances from the Federal Home Loan Bank, by branch, as of the Balance Sheet date.

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Amount of maximum advances or credit lines available from the Federal Home Loan Bank (FHLB).

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Amount of repayments and penalties incurred in the satisfaction or roll-over of Federal Home Loan Bank (FHLB) advance.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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The cash flow from investments sold under the agreement to repurchase such investment.

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