CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Class B
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	18,289,977	18,197,552
Common stock, shares outstanding	18,289,977	18,197,552
Class A
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized	55,000,000	55,000,000
Common stock, shares issued	18,510,975	18,510,975
Common stock, shares outstanding	18,510,975	18,510,975