Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 1,249,704	$ 1,289,965
Interest-bearing deposits at banks	4,713,266	6,470,867
Federal funds sold		83,392
Trading account	340,710	308,175
Investment securities (includes pledged securities that can be sold or repledged of $1,614,909 at September 30, 2015; $1,631,267 at December 31, 2014)
Available for sale (cost: $10,923,234 at September 30, 2015; $8,919,324 at December 31, 2014)	11,159,509	9,156,932
Held to maturity (fair value: $3,025,687 at September 30, 2015; $3,538,282 at December 31, 2014)	2,998,486	3,507,868
Other (fair value: $336,544 at September 30, 2015; $328,742 at December 31, 2014)	336,544	328,742
Total investment securities	14,494,539	12,993,542
Loans and leases	68,766,144	66,899,369
Unearned discount	(225,896)	(230,413)
Loans and leases, net of unearned discount	68,540,248	66,668,956
Allowance for credit losses	(933,798)	(919,562)
Loans and leases, net	67,606,450	65,749,394
Premises and equipment	581,976	612,984
Goodwill	3,513,325	3,524,625
Core deposit and other intangible assets	18,179	35,027
Accrued interest and other assets	5,278,913	5,617,564
Total assets	97,797,062	96,685,535
Liabilities
Noninterest-bearing deposits	28,189,330	26,947,880
NOW accounts	2,459,527	2,307,815
Savings deposits	39,298,134	41,085,803
Time deposits	2,791,367	3,063,973
Deposits at Cayman Islands office	206,185	176,582
Total deposits	72,944,543	73,582,053
Federal funds purchased and agreements to repurchase securities	173,783	192,676
Accrued interest and other liabilities	1,582,513	1,567,951
Long-term borrowings	10,174,289	9,006,959
Total liabilities	84,875,128	84,349,639
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 731,500 shares at September 30, 2015 and December 31, 2014; Liquidation preference of $10,000 per share: 50,000 shares at September 30, 2015 and December 31, 2014	1,231,500	1,231,500
Common stock, $.50 par, 250,000,000 shares authorized, 133,274,963 shares issued at September 30, 2015; 132,312,931 shares issued at December 31, 2014	66,637	66,157
Common stock issuable, 36,462 shares at September 30, 2015; 41,330 shares at December 31, 2014	2,341	2,608
Additional paid-in capital	3,511,182	3,409,506
Retained earnings	8,273,747	7,807,119
Accumulated other comprehensive income (loss), net	(163,473)	(180,994)
Total shareholders' equity	12,921,934	12,335,896
Total liabilities and shareholders' equity	$ 97,797,062	$ 96,685,535