Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 422,779	$ 563,304
Interest-bearing deposits in other financial institutions	121,390	147,434
Federal funds sold and securities purchased under agreements to resell	10,800	27,135
Investment securities held to maturity at amortized cost	75,946	39,877
Investment securities available for sale, at fair value	4,854,319	4,926,758
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	181,008	166,774
Loans held for sale	203,576	261,410
Loans	15,746,599	15,411,022
Allowance for loan losses	(277,218)	(297,409)
Loans, net	15,469,381	15,113,613
Premises and equipment, net	258,903	253,958
Goodwill	929,168	929,168
Other intangible assets, net	74,612	61,176
Trading Assets	49,732	70,711
Other assets	965,330	926,417
Total assets	23,616,944	23,487,735
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing demand deposits	4,259,776	4,759,556
Interest-bearing deposits	12,872,660	12,180,309
Total deposits	17,132,436	16,939,865
Federal funds purchased and securities sold under agreements to repurchase	545,740	750,455
Other short-term funding	2,218,760	1,576,484
Long-term funding	614,822	1,015,346
Trading liabilities	52,598	76,343
Accrued expenses and other liabilities	175,612	192,843
Total liabilities	20,739,968	20,551,336
Stockholders' equity
Preferred equity	63,272	63,272
Common stock	1,750	1,750
Surplus	1,610,243	1,602,136
Retained earnings	1,330,737	1,281,811
Accumulated other comprehensive income (loss)	(25,015)	48,603
Treasury stock, at cost	(104,011)	(61,173)
Total stockholders' equity	2,876,976	2,936,399
Total liabilities and stockholders' equity	$ 23,616,944	$ 23,487,735
Preferred shares issued	65,000	65,000
Preferred shares authorized (par value $1.00 per share)	750,000	750,000
Common shares issued	175,012,686	175,012,686
Common shares authorized (par value $0.01 per share)	250,000,000	250,000,000
Treasury shares of common stock	7,628,961	4,773,146