|
Consolidated Balance Sheets (Parenthetical) (USD $)
|
Jun. 30, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Common stock, par value (USD per share) | $ 1.25 | $ 1.25 |
| Common stock, shares authorized | 36,000,000 | 36,000,000 |
| Common stock, shares issued | 18,496,680 | 18,496,680 |
| Treasury stock, shares at cost | 7,528,693 | 7,527,841 |