Condensed Consolidated Balance Sheets (Parentheticals) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Series A Convertible Preferred Stock, par value (in dollars per share)	$ 1	$ 1
Series A Convertible Preferred Stock, Shares Authorized	1,000,000	1,000,000
Series A Convertible Preferred Stock, Shares Outstanding
Class A Common Stock
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorised	40,000,000	40,000,000
Common Stock, Shares Issued	16,236,890	16,070,348
Common Stock, Shares Outstanding	10,135,040	10,214,798
Common Stock in treasury, Shares	6,101,850	5,855,550
Class B Convertible Common Stock
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorised	9,000,000	9,000,000
Common Stock, Shares Issued	8,010,497	8,010,497
Common Stock, Shares Outstanding	8,010,497	8,010,497