|
Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)
|
Sep. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Stockholders' equity | ||
| Preferred stock, par value (in dollars per share) | $ 4 | $ 4 |
| Liquidation preference (in dollars per share) | $ 1,000 | $ 1,000 |
| Preferred stock, shares authorized (in shares) | 1,000,000 | 1,000,000 |
| Preferred stock, shares issued (in shares) | 14,738 | 14,738 |
| Preferred stock, shares outstanding (in shares) | 14,738 | 14,738 |
| Common stock, par value (in dollars per share) | $ 4 | $ 4 |
| Common stock, shares authorized (in shares) | 10,000,000 | 10,000,000 |
| Common stock, shares issued (in shares) | 4,251,795 | 4,243,378 |
| Common stock, shares outstanding (in shares) | 4,251,795 | 4,243,378 |