Note 6 - Bank Premises and Equipment - Bank Premises and Equipment (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Bank premises and equipment | $ 70,143 | $ 71,879 |
| Less accumulated depreciation | 42,974 | 43,635 |
| Bank premises and equipment, net | 27,169 | 28,244 |
| Land, Buildings and Improvements [Member] | ||
| Bank premises and equipment | 44,651 | 47,398 |
| Equipment, Furniture and Fixtures [Member] | ||
| Bank premises and equipment | $ 25,492 | $ 24,481 |