Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Investment securities held-to-maturity, fair value | $ 92,828 | $ 107,629 |
| Common stock, par value (in dollars per share) | $ 1 | $ 1 |
| Common stock, shares authorized (in shares) | 200,000,000 | 200,000,000 |
| Common stock, shares outstanding (in shares) | 53,116,519 | 44,854,509 |
| Common stock, shares issued (in shares) | 53,116,519 | 44,854,509 |