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Note 15 - Commitments and Contingencies (Details) - USD ($) $ in Millions | 1 Months Ended | 2 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2007 | Jul. 31, 2007 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Note 15 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates |  |  | $ 50.1 |  |
Loans and Leases Receivable, Commitments, Weighted Average Fixed Rate of Interest |  |  | 4.18% |  |
Loans and Leases Receivable, Commitments, Variable Rates |  |  | $ 278.7 |  |
Loans and Leases Receivable, Commitments, Variable Rates, Weighted Average Rate |  |  | 3.46% |  |
Loan Commitments Expiration |  |  | 90 days |  |
Line of Credit, Maturity, Max |  |  | 18 months |  |
Operating Leases, Rent Expense |  |  | $ 5.8 | $ 3.8 | $ 3.7
Home Equity Line of Credit [Member] |  |  |  |  |
Note 15 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Loans and Leases Receivable, Commitments, Credit |  |  | $ 232.5 |  |
Line of Credit, Maturity, Max |  |  | 10 years |  |
Letter of Credit Pledged as Collateral [Member] |  |  |  |  |
Note 15 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Deposit Liabilities, Collateral Issued, Financial Instruments |  |  | $ 494.0 |  |
Mortgages [Member] |  |  |  |  |
Note 15 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Loans and Leases Receivable, Commitments, Credit |  |  | $ 96.2 |  |
Capital Securities [Member] | Flushing Financial's Capital Trusts [Member] |  |  |  |  |
Note 15 - Commitments and Contingencies (Details) [Line Items] |  |  |  |  |
Proceeds from Issuance of Debt | $ 20.6 | $ 61.9 |  |  |

X
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