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Note 5 - Loans - Loans Modified and Classified as TDR (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Jun. 30, 2017 USD ($)
Financing Receivable, Modifications, Number of Contracts | 0 | 0 | 5
Financing Receivable, Modifications, Balance |  |  | $ 4,289
Taxi Medallion Portfolio Segment [Member] | Interest Rate Below Market Reduction [Member] |  |  |
Financing Receivable, Modifications, Number of Contracts |  |  | 5
Financing Receivable, Modifications, Balance |  |  | $ 4,289

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