Consolidated Condensed Statements of Condition (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Cash and due from banks (Restricted - $.2 million on March 31, 2013; $1.7 million on March 31, 2012; and $- on December 31, 2012)	$ 275,262,000	$ 469,879,000	$ 349,604,000
Total cash and cash equivalents (Restricted - $.2 million on March 31, 2013; $1.7 million on March 31, 2012; and $- on December 31, 2012)	1,041,696,000	1,106,262,000	964,309,000
Loans, net of unearned income (Restricted - $.1 billion on March 31, 2013 and December 31, 2012; and $.2 billion on March 31, 2012) (Note 3)	15,889,670,000	16,708,582,000	15,971,330,000
Less: Allowance for loan losses ( Restricted - $3.7 million on March 31, 2013; $10.4 million on March 31, 2012; and $4.3 million on December 31, 2012) (Note 3)	265,218,000	276,963,000	346,016,000
Total net loans (Restricted - $.1 billion on March 31, 2013, March 31, 2012 and December 31, 2012)	15,624,452,000	16,431,619,000	15,625,314,000
Other assets (Restricted - $1.6 million on March 31, 2013; $4.5 million on March 31, 2012; and $1.9 million on December 31, 2012)	1,663,092,000	1,670,840,000	1,802,675,000
Total assets (Restricted - $.1 billion on March 31, 2013 and December 31, 2012; and $.2 billion on March 31, 2012)	25,166,427,000	25,520,140,000	25,678,969,000
Term borrowings (Restricted - $.1 billion on March 31, 2013 and December 31, 2012; and $.2 billion on March 31, 2012)	2,197,864,000	2,226,482,000	2,340,706,000
Other liabilities	685,153,000	743,933,000	583,339,000
Total liabilities (Restricted - $.1 billion on March 31, 2013 and December 31, 2012; and $.2 billion on March 31, 2012)	22,566,700,000	23,010,934,000	23,004,796,000
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	241,224,839	243,597,780	252,666,860
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 - $.2 million on March 31, 2013; $1.7 million on March 31, 2012; and $- on December 31, 2012)	200,000	0	1,700,000
Total cash and cash equivalents (Restricted - $.2 million on March 31, 2013; $1.7 million on March 31, 2012; and $- on December 31, 2012)	200,000	0	1,700,000
Loans, net of unearned income (Restricted - $.1 billion on March 31, 2013 and December 31, 2012; and $.2 billion on March 31, 2012) (Note 3)	100,000,000	100,000,000	200,000,000
Less: Allowance for loan losses ( Restricted - $3.7 million on March 31, 2013; $10.4 million on March 31, 2012; and $4.3 million on December 31, 2012) (Note 3)	3,700,000	4,300,000	10,400,000
Total net loans (Restricted - $.1 billion on March 31, 2013, March 31, 2012 and December 31, 2012)	100,000,000	100,000,000	100,000,000
Other assets (Restricted - $1.6 million on March 31, 2013; $4.5 million on March 31, 2012; and $1.9 million on December 31, 2012)	1,600,000	1,900,000	4,500,000
Total assets (Restricted - $.1 billion on March 31, 2013 and December 31, 2012; and $.2 billion on March 31, 2012)	100,000,000	100,000,000	200,000,000
Term borrowings (Restricted - $.1 billion on March 31, 2013 and December 31, 2012; and $.2 billion on March 31, 2012)	100,000,000	100,000,000	200,000,000
Total liabilities (Restricted - $.1 billion on March 31, 2013 and December 31, 2012; and $.2 billion on March 31, 2012)	$ 100,000,000	$ 100,000,000	$ 200,000,000