Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 631	$ 665
Preferred stock par value	$ 1	$ 1
Preferred stock authorized shares	1,000,000	1,000,000
Preferred stock issued
Common stock, $.33 1/3 par value	$ 0.3333	$ 0.3333
Common stock authorized shares	12,000,000	12,000,000
Common stock issued shares	7,178,400	7,107,400
Common stock outstanding shares	6,610,580	6,539,580
Treasury stock, shares	567,820	567,820