|
Consolidated Balance Sheets (Parenthetical) (USD $)
|
Jun. 30, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Statement Of Financial Position [Abstract] | ||
| Common stock, par value | $ 6.25 | $ 6.25 |
| Common stock, Authorized shares | 9,000,000 | 9,000,000 |
| Common stock, shares issued | 2,980,602 | 2,980,602 |
| Common stock, shares outstanding | 2,736,634 | 2,736,060 |
| Treasury stock, at cost | 243,968 | 244,542 |