Consolidated Statements of Changes in Equity and Comprehensive Income (Parentheticals) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Cash dividends per share preferred stock	$ 50.00	$ 50.00
Cash dividends per share common stock	$ 0.40	$ 0.40
Shares of common stock purchased	54,723	14,420
Shares of common stock issued	114,458	93,113