Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Consolidated Balance Sheets
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, liquidation value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares authorized	300,000	300,000
Preferred stock, shares issued	73,000	73,000
Preferred stock, shares outstanding	73,000	73,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, authorized shares	60,000,000	60,000,000
Common stock, shares issued	18,729,134	18,627,858
Common stock, shares outstanding	14,084,328	14,034,991
Treasury stock, shares	4,644,806	4,592,867