Note 1 - Summary of Significant Accounting Policies - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Net unrealized gains (losses) on securities available for sale | $ (10,143) | $ (2,338) | $ (1,722) |
| Post retirement benefit obligations | (1,256) | (1,226) | (2,267) |
| Tax effect | 3,876 | 1,212 | 1,356 |
| Accumulated other comprehensive loss | $ (7,523) | $ (2,352) | $ (2,633) |