Consolidated Condensed Statements of Condition (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Cash and due from banks (Restricted - $1.5 million on September 30, 2013; $.6 million on September 30, 2012; and $ - on December 31, 2012)	$ 395,631,000	$ 469,879,000	$ 355,978,000
Total cash and cash equivalents (Restricted - $1.5 million on September 30, 2013; $.6 million on September 30, 2012; and $ - on December 31, 2012)	1,024,816,000	1,106,262,000	885,666,000
Loans, net of unearned income (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012) (Note 4)	15,408,556,000	16,708,582,000	16,523,783,000
Less: Allowance for loan losses (Restricted - $3.2 million on September 30, 2013; $4.4 million on September 30, 2012; and $4.3 million on December 31, 2012) (Note 4)	255,710,000	276,963,000	281,744,000
Total net loans (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012)	15,152,846,000	16,431,619,000	16,242,039,000
Other assets (Restricted - $1.4 million on September 30, 2013; $1.9 million on September 30, 2012 and December 31, 2012)	1,637,138,000	1,670,840,000	1,652,866,000
Total assets (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012)	24,193,341,000	25,520,140,000	25,739,830,000
Term borrowings (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012)	1,771,288,000	2,226,482,000	2,263,238,000
Total liabilities (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012)	21,760,048,000	23,010,934,000	23,207,942,000
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	236,328,090	243,597,780	247,133,973
Preferred stock, no par value	$ 0	$ 0	$ 0
Preferred Stock Liquidation Preference Value	100,000	0	0
Preferred stock, shares authorized	1,000	0	0
Preferred stock, shares issued	1,000	0	0
Variable Interest Entity, Primary Beneficiary [Member]
Cash and due from banks (Restricted - $1.5 million on September 30, 2013; $.6 million on September 30, 2012; and $ - on December 31, 2012)	1,500,000	0	600,000
Total cash and cash equivalents (Restricted - $1.5 million on September 30, 2013; $.6 million on September 30, 2012; and $ - on December 31, 2012)	1,500,000	0	600,000
Loans, net of unearned income (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012) (Note 4)	100,000,000	100,000,000	100,000,000
Less: Allowance for loan losses (Restricted - $3.2 million on September 30, 2013; $4.4 million on September 30, 2012; and $4.3 million on December 31, 2012) (Note 4)	3,200,000	4,300,000	4,400,000
Total net loans (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012)	100,000,000	100,000,000	100,000,000
Other assets (Restricted - $1.4 million on September 30, 2013; $1.9 million on September 30, 2012 and December 31, 2012)	1,400,000	1,900,000	1,900,000
Total assets (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012)	100,000,000	100,000,000	100,000,000
Term borrowings (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012)	100,000,000	100,000,000	100,000,000
Total liabilities (Restricted - $.1 billion on September 30, 2013; September 30, 2012; and December 31, 2012)	$ 100,000,000	$ 100,000,000	$ 100,000,000