Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Allowances for receivables	$ 1,678	$ 1,259
Common Stock, par value	$ 1	$ 1
Common Stock, shares authorized	44,000,000	44,000,000
Common Stock, shares issued	10,159,498	10,066,789
Common Stock in treasury	512,818	501,207