|
Consolidated Balance Sheets (Parenthetical) (USD $)
|
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| 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 | 7,717,403 | 7,671,475 |