Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 1,368,040	$ 1,289,965
Interest-bearing deposits at banks	7,594,350	6,470,867
Federal funds sold		83,392
Trading account	273,783	308,175
Investment securities (includes pledged securities that can be sold or repledged of $2,136,712 at December 31, 2015; $1,631,267 at December 31, 2014)
Available for sale (cost: $12,138,636 at December 31, 2015; $8,919,324 at December 31, 2014)	12,242,671	9,156,932
Held to maturity (fair value: $2,864,147 at December 31, 2015; $3,538,282 at December 31, 2014)	2,859,709	3,507,868
Other (fair value: $554,059 at December 31, 2015; $328,742 at December 31, 2014)	554,059	328,742
Total investment securities	15,656,439	12,993,542
Loans and leases	87,719,234	66,899,369
Unearned discount	(229,735)	(230,413)
Loans and leases, net of unearned discount	87,489,499	66,668,956
Allowance for credit losses	(955,992)	(919,562)
Loans and leases, net	86,533,507	65,749,394
Premises and equipment	666,682	612,984
Goodwill	4,593,112	3,524,625
Core deposit and other intangible assets	140,268	35,027
Accrued interest and other assets	5,961,703	5,617,564
Total assets	122,787,884	96,685,535
Liabilities
Noninterest-bearing deposits	29,110,635	26,947,880
Interest-checking deposits	2,939,274	2,307,815
Savings deposits	46,627,370	41,085,803
Time deposits	13,110,392	3,063,973
Deposits at Cayman Islands office	170,170	176,582
Total deposits	91,957,841	73,582,053
Federal funds purchased and agreements to repurchase securities	150,546	192,676
Other Short-term borrowings	1,981,636
Accrued interest and other liabilities	1,870,714	1,567,951
Long-term borrowings	10,653,858	9,006,959
Total liabilities	106,614,595	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 December 31, 2015 and December 31, 2014; Liquidation preference of $10,000 per share: 50,000 shares at December 31, 2015 and December 31, 2014	1,231,500	1,231,500
Common stock, $.50 par, 250,000,000 shares authorized, 159,563,512 shares issued at December 31, 2015; 132,312,931 shares issued at December 31, 2014	79,782	66,157
Common stock issuable, 36,644 shares at December 31, 2015; 41,330 shares at December 31, 2014	2,364	2,608
Additional paid-in capital	6,680,768	3,409,506
Retained earnings	8,430,502	7,807,119
Accumulated other comprehensive income (loss), net	(251,627)	(180,994)
Total shareholders' equity	16,173,289	12,335,896
Total liabilities and shareholders' equity	$ 122,787,884	$ 96,685,535