Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 1,320,549	$ 1,368,040
Interest-bearing deposits at banks	5,000,638	7,594,350
Trading account	323,867	273,783
Investment securities (includes pledged securities that can be sold or repledged of $1,203,473 at December 31, 2016; $2,136,712 at December 31, 2015)
Available for sale (cost: $13,338,301 at December 31, 2016; $12,138,636 at December 31, 2015)	13,332,072	12,242,671
Held to maturity (fair value: $2,451,222 at December 31, 2016; $2,864,147 at December 31, 2015)	2,457,278	2,859,709
Other (fair value: $461,118 at December 31, 2016; $554,059 at December 31, 2015)	461,118	554,059
Total investment securities	16,250,468	15,656,439
Loans and leases	91,101,677	87,719,234
Unearned discount	(248,261)	(229,735)
Loans and leases, net of unearned discount	90,853,416	87,489,499
Allowance for credit losses	(988,997)	(955,992)
Loans and leases, net	89,864,419	86,533,507
Premises and equipment	675,263	666,682
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	97,655	140,268
Accrued interest and other assets	5,323,235	5,961,703
Total assets	123,449,206	122,787,884
Liabilities
Noninterest-bearing deposits	32,813,896	29,110,635
Savings and interest-checking deposits	52,346,207	49,566,644
Time deposits	10,131,846	13,110,392
Deposits at Cayman Islands office	201,927	170,170
Total deposits	95,493,876	91,957,841
Federal funds purchased and agreements to repurchase securities	163,442	150,546
Other short-term borrowings		1,981,636
Accrued interest and other liabilities	1,811,431	1,870,714
Long-term borrowings	9,493,835	10,653,858
Total liabilities	106,962,584	106,614,595
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 December 31, 2016 and December 31, 2015; Liquidation preference of $10,000 per share: 50,000 shares at December 31, 2016 and December 31, 2015	1,231,500	1,231,500
Common stock, $.50 par, 250,000,000 shares authorized, 159,945,678 shares issued at December 31, 2016; 159,563,512 shares issued at December 31, 2015	79,973	79,782
Common stock issuable, 32,403 shares at December 31, 2016; 36,644 shares at December 31, 2015	2,145	2,364
Additional paid-in capital	6,676,948	6,680,768
Retained earnings	9,222,488	8,430,502
Accumulated other comprehensive income (loss), net	(294,636)	(251,627)
Treasury stock - common, at cost - 3,764,742 shares at December 31, 2016	(431,796)
Total shareholders’ equity	16,486,622	16,173,289
Total liabilities and shareholders’ equity	$ 123,449,206	$ 122,787,884