Note 10 - Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Change in unfunded portion of postretirement benefit obligation, tax | $ 211 | $ (74) | $ (382) |
| Net unrealized securities (losses) gains | (3,545) | (1,052) | 4,737 |
| Total income tax (benefit) expense recorded directly to shareholders’ equity | $ (3,334) | $ (1,126) | $ 4,355 |