Consolidated Balance Sheets (Dollar amounts in thousands) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts (in Dollars)	$ 1,678	$ 1,780
Preferred Stock – authorized shares	2,000,000	2,000,000
Preferred Stock – par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred Stock – shares issued	0	0
Preferred Stock – shares outstanding	0	0
Common Class A [Member]
Authorized Shares	90,000,000	90,000,000
Par Value (in Dollars per share)	$ 0.01	$ 0.01
Shares Issued	29,982,254	29,761,756
Shares Outstanding	27,560,637	27,340,139
Class A – shares held in treasury	2,421,617	2,421,617
Common Class B [Member]
Authorized Shares	18,000,000	18,000,000
Par Value (in Dollars per share)	$ 0.01	$ 0.01
Shares Issued	8,039,524	8,039,524
Shares Outstanding	8,039,524	8,039,524