Consolidated balance sheets (Parenthetical) - $ / shares |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Common stock, par value (in dollars per share) | $ 1 | $ 1 |
| Common stock, shares authorized (in shares) | 75,000,000 | 75,000,000 |
| Common stock, shares issued (in shares) | 47,220,743 | 31,034,315 |
| Common stock, shares outstanding (in shares) | 47,220,743 | 31,034,315 |