CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Statement Of Financial Position [Abstract]
Preferred stock, stated value	$ 1,000	$ 1,000	$ 1,000
Preferred stock, shares authorized	5,000,000	5,000,000	5,000,000
Preferred stock, shares issued	28,000	28,000	52,000
Preferred stock, shares Outstanding	28,000	28,000	52,000
Common stock, par value	$ 1	$ 1	$ 1
Common stock, shares authorized	30,000,000	30,000,000	30,000,000
Common stock, shares issued	25,238,635	25,154,818	25,150,318
Treasury stock, shares	1,362,955	1,355,050	1,336,174