Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Consolidated Balance Sheets [Abstract]
Common stock, par value	$ 2.00	$ 2.00
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	21,871,063	21,865,535
Common stock, shares outstanding	21,871,063	21,865,535