Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
ASSETS
Cash and cash equivalents	$ 460,618	$ 469,630
Interest bearing funds with Federal Reserve Bank	884,743	644,528
Interest earning deposits with banks	9,139	24,325
Federal funds sold and securities purchased under resale agreements	76,097	80,975
Trading account assets, at fair value	17,808	6,113
Mortgage loans held for sale, at fair value	50,390	45,384
Other loans held for sale	3,120	10,685
Investment securities available for sale, at fair value	3,132,402	3,199,358
Loans, net of deferred fees and costs	20,159,004	20,057,798
Allowance for loan losses	(300,871)	(307,560)
Loans, net	19,858,133	19,750,238
Premises and equipment, net	467,375	468,871
Goodwill	24,431	24,431
Other intangible assets, net	1,883	3,415
Other real estate	110,757	112,629
Deferred tax asset, net	712,130	744,646
Other assets	626,400	616,376
Total assets	26,435,426	26,201,604
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest bearing deposits	5,870,570	5,642,751
Interest bearing deposits, excluding brokered deposits	13,714,382	14,140,037
Brokered deposits	1,365,939	1,094,002
Total deposits	20,950,891	20,876,790
Federal funds purchased and securities sold under repurchase agreements	164,946	148,132
Long-term debt	2,106,980	2,033,141
Other liabilities	214,113	194,556
Total liabilities	23,436,930	23,252,619
Shareholders' Equity:
Common stock - $1.00 par value. Authorized 1,200,000,000 shares; 978,499,721 issued at March 31, 2014 and 978,044,909 issued at December 31, 2013; 972,806,269 outstanding at March, 2014 and 972,351,457 outstanding at December 31, 2013	978,500	978,045
Additional paid-in capital	2,137,479	2,138,024
Treasury stock, at cost – 5,693,452 shares at March 31, 2014 and December 31, 2013	(114,176)	(114,176)
Accumulated other comprehensive loss, net	(30,463)	(41,258)
Accumulated deficit	(98,824)	(137,512)
Total shareholders' equity	2,998,496	2,948,985
Total liabilities and shareholders' equity	26,435,426	26,201,604
Series C Preferred Stock [Member]
Shareholders' Equity:
Series C Preferred Stock – no par value. 5,200,000 shares outstanding at March 31, 2014 and December 31, 2013	$ 125,980	$ 125,862