Consolidated Condensed Balance Sheets (Unaudited) (Parentheticals) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Preferred stock, par value (in Dollars per share)	$ 5	$ 5
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares outstanding	0	0
Common Class A [Member]
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	27,227,382	27,215,117
Common stock, par value (in Dollars per share)	$ 5	$ 5
Common Class B [Member]
Common stock, shares authorized	600,000	600,000
Common stock, shares issued	548,564	548,564
Common stock, par value (in Dollars per share)	$ 5	$ 5