CONSOLIDATED BALANCE SHEET (Parenthetical) - $ / shares |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Preferred stock, shares authorized (in shares) | 3,000,000 | 3,000,000 |
| Preferred stock, shares issued (in shares) | 0 | 0 |
| Common stock, par value (in dollars per share) | $ 8.33 | $ 8.33 |
| Common stock, shares authorized (in shares) | 15,000,000 | 15,000,000 |
| Common stock, shares issued (in shares) | 5,004,984 | 5,002,649 |
| Treasury stock, shares (in shares) | 257,852 | 197,834 |