Note 12. Stock Compensation Plan - Stock Compensation Awards (Details) (USD $)	3 Months Ended
	Dec. 31, 2013	Sep. 30, 2013
Annual Performance Shares | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Stock Compensation, Shares Awarded	4,958	229,500
Stock Compensation, Grant Date Fair Value		$ 11.05
Annual Performance Shares | Class A Common Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Stock Compensation, Grant Date Fair Value	$ 10.95
Annual Performance Shares | Class A Common Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Stock Compensation, Grant Date Fair Value	$ 11.07
Long-Term Performance Shares | Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Stock Compensation, Shares Awarded	18,102	405,500
Stock Compensation, Grant Date Fair Value		$ 11.05
Long-Term Performance Shares | Class A Common Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Stock Compensation, Grant Date Fair Value	$ 10.95
Long-Term Performance Shares | Class A Common Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Stock Compensation, Grant Date Fair Value	$ 11.07
Unrestricted Shares Director Compensation | Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Stock Compensation, Shares Awarded		15,017
Stock Compensation, Grant Date Fair Value		$ 10.09
Unrestricted Shares | Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Stock Compensation, Shares Awarded		1,000
Stock Compensation, Grant Date Fair Value		$ 10.01