CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Common stock, par value | $ 1 | $ 1 |
| Common stock, shares authorized | 50,000,000 | 50,000,000 |
| Common stock, shares issued | 21,381,779 | 21,381,779 |
| Treasury stock, shares | 4,392,807 | 3,283,638 |
| Undesignated Par Value | ||
| Preferred stock, no par value | ||
| Preferred stock, shares authorized | 1,000,000 | 1,000,000 |
| Designated Par Value | ||
| Preferred Stock, par value | $ 0.01 | $ 0.01 |
| Preferred stock, shares authorized | 25,000 | 25,000 |
| Preferred Stock, shares outstanding | 0 | 0 |