Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Common stock, par value	$ 0.50	$ 0.50
Common stock, Authorized shares	30,000,000	30,000,000
Common stock, Issued shares	19,975,706	19,747,470
Common stock, outstanding shares	19,975,706	19,747,470