Consolidated Condensed Statements of Condition (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Cash and due from banks (Restricted - $.3 million on September 30, 2014; and $1.5 million on September 30, 2013; and $1.2 million on December 31, 2013)	$ 292,687,000	$ 349,216,000	$ 395,631,000
Total cash and cash equivalents (Restricted - $.3 million on September 30, 2014; and $1.5 million on September 30, 2013; and $1.2 million on December 31, 2013)	909,731,000	827,909,000	1,024,816,000
Loans, net of unearned income (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013) (Note 4)	15,812,017,000	15,389,074,000	15,408,556,000
Less: Allowance for loan losses (Restricted - $.8 million on September 30, 2014; $3.2 million on September 30, 2013; and $4.4 million on December 31, 2013) (Note 5)	238,641,000	253,809,000	255,710,000
Total net loans (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	15,573,376,000	15,135,265,000	15,152,846,000
Other assets (Restricted - $.4 million on September 30, 2014; $1.4 million on September 30, 2013; and $1.9 million on December 31, 2013)	1,356,356,000	1,685,384,000	1,637,139,000
Total assets (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	23,986,787,000	23,789,833,000	23,858,753,000
Term borrowings (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	1,491,138,000	1,739,859,000	1,771,288,000
Total liabilities (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	21,364,846,000	21,289,082,000	21,425,460,000
Total liabilities and equity (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	23,986,787,000	23,789,833,000	23,858,753,000
Common stock, par value	$ 0.625	$ 0.625	$ 0.625
Common stock, shares authorized	400,000,000	400,000,000	400,000,000
Common stock, shares issued	235,248,564	236,369,554	236,328,090
Preferred stock, no par value	$ 0	$ 0	$ 0
PreferredStockLiquidationPreference	$ 100,000	$ 100,000	$ 100,000
Preferred stock, shares authorized	1,000	1,000	1,000
Preferred stock, shares issued	1,000	1,000	1,000
Variable Interest Entity, Primary Beneficiary [Member]
Cash and due from banks (Restricted - $.3 million on September 30, 2014; and $1.5 million on September 30, 2013; and $1.2 million on December 31, 2013)	300,000	1,200,000	1,500,000
Total cash and cash equivalents (Restricted - $.3 million on September 30, 2014; and $1.5 million on September 30, 2013; and $1.2 million on December 31, 2013)	300,000	1,200,000	1,500,000
Loans, net of unearned income (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013) (Note 4)	100,000,000	100,000,000	100,000,000
Less: Allowance for loan losses (Restricted - $.8 million on September 30, 2014; $3.2 million on September 30, 2013; and $4.4 million on December 31, 2013) (Note 5)	800,000	4,400,000	3,200,000
Total net loans (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	100,000,000	100,000,000	100,000,000
Other assets (Restricted - $.4 million on September 30, 2014; $1.4 million on September 30, 2013; and $1.9 million on December 31, 2013)	400,000	1,900,000	1,400,000
Total assets (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	100,000,000	100,000,000	100,000,000
Term borrowings (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	100,000,000	100,000,000	100,000,000
Total liabilities (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	100,000,000	100,000,000	100,000,000
Total liabilities and equity (Restricted - $.1 billion on September 30, 2014; September 30, 2013; and December 31, 2013)	$ 100,000,000	$ 100,000,000	$ 100,000,000