Consolidated Statement Of Changes In Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Common stock dividends per share, declared	$ 0.34	$ 0.30
Series A 3% Preferred Stock [Member]
Preferred stock dividends per share, declared	$ 2.25	$ 2.25
Series A Preferred Stock [Member]
Preferred stock dividends per share, declared	$ 53.24	$ 187.50
Series B-1 8.48% Preferred Stock [Member]
Preferred stock dividends per share, declared	$ 6.36	$ 6.36