Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Common stock, par value	$ 0.835	$ 0.835
Common stock, authorized	60,000,000	60,000,000
Common stock, issued	10,299,041	10,376,169
Common stock, outstanding	10,299,041	10,376,169