Consolidated Statements of Changes in Equity (Parentheticals)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Conversion of Class B common stock to Class A common stock, shares	273,021	216,554
Stock issued during period, shares	3,791,004
TEU Purchase Contracts issued during period, units	2,300,000
Treasury stock, shares, acquired	63,462	24,999
Settlement of deferred stock awards, shares	31,244