Consolidated Statement Of Changes In Shareholders' Equity (Parenthetical) (USD $)	6 Months Ended
	Jun. 30, 2011
Common stock dividends per share, declared	$ 0.22
Series A 3% Preferred Stock [Member]
Preferred stock dividends per share, declared	$ 1.50
Series A Preferred Stock [Member]
Preferred stock dividends per share, declared	$ 53.24
Series B 8.48% Preferred Stock [Member]
Preferred stock dividends per share, declared	$ 4.24