Consolidated Statements of Changes in Equity and Comprehensive Income Parentheticals	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Conversion of Class B common stock to Class A common stock, shares	216,554	149,763
Treasury stock, shares, acquired	24,999	24,592	14,905
Stock issued during period, shares			4,600,000