Note 5 - Loans and Leases - Outstanding Principal Balance and Related Carrying Amount of Credit-Impaired Loans (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
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|---|---|---|---|---|
| Outstanding principal balance | $ 18,091 | $ 24,879 | ||
| Carrying amount(1) | [1] | $ 12,432 | $ 16,846 | |
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