Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Series A convertible preferred stock, aggregate liquidation preference	$ 2,762	$ 2,762
Series C fixed rate cumulative perpetual preferred stock, aggregate liquidation preference	$ 32,668	$ 32,668
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	7,453,555	7,453,555
Treasury stock, at cost, shares	1,390,114	1,405,150