Consolidated Condensed Statements Of Condition (Parenthetical) (USD $)	Sep. 30, 2011		Dec. 31, 2010		Sep. 30, 2010
Consolidated Condensed Statements Of Condition [Abstract]
Restricted cash and due from banks	$ 4,700,000		$ 3,100,000		$ 0
Restricted total cash and cash equivalents	4,700,000		3,100,000		0
Restricted loans	700,000,000		800,000,000		800,000,000
Restricted allowance for loan losses	32,400,000		47,500,000		47,800,000
Restricted net loans	600,000,000		700,000,000		700,000,000
Restricted other assets	13,600,000		19,700,000		19,100,000
Restricted total assets	700,000,000		700,000,000		800,000,000
Restricted noninterest-bearing deposits	0		1,200,000		1,100,000
Restricted total deposits	0		1,200,000		1,100,000
Restricted term borrowings	700,000,000		800,000,000		800,000,000
Restricted other liabilities	100,000		100,000		100,000
Restricted total liabilities	700,000,000		800,000,000		800,000,000
Preferred stock, shares authorized	5,000,000		5,000,000		5,000,000
Preferred stock, par value	$ 0		$ 0		$ 0
Preferred stock, shares issued	0		0		866,540
Common stock, par value	$ 0.625		$ 0.625		$ 0.625
Common stock, shares authorized	400,000,000	[1]	400,000,000	[1]	400,000,000	[1]
Common stock, shares issued	263,619,040		263,366,429	[1]	237,060,935	[1]
Deposits transferred to purchaser of subsidiary	$ 174,400,000

[1] Outstanding shares have been restated to reflect stock dividends distributed through January 1, 2011.