Consolidated Balance Sheet (unaudited) (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets (unaudited) (Parenthetical) [Abstract]
Common Stock, Par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common Stock, shares issued (in shares)	31,409,638	31,409,638
Treasury stock, shares ( in shares)	1,990,583	1,978,533