Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 1,298,192	$ 1,432,805
Interest-bearing deposits at banks	8,896,307	7,190,154
Federal funds sold		3,500
Trading account	1,224,291	470,129
Investment securities (includes pledged securities that can be sold or repledged of $195,217 at March 31, 2020; $200,339 at December 31, 2019)
Available for sale (cost: $5,948,056 at March 31, 2020; $6,258,276 at December 31, 2019)	6,139,979	6,318,776
Held to maturity (fair value: $2,397,849 at March 31, 2020; $2,699,206 at December 31, 2019)	2,300,642	2,656,917
Equity and other securities (cost: $502,234 at March 31, 2020; $487,041 at December 31, 2019)	515,969	521,558
Total investment securities	8,956,590	9,497,251
Loans and leases	94,408,178	91,188,525
Unearned discount	(265,903)	(265,656)
Loans and leases, net of unearned discount	94,142,275	90,922,869
Allowance for credit losses	(1,384,366)	(1,051,071)
Loans and leases, net	92,757,909	89,871,798
Premises and equipment	1,154,558	1,140,924
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	25,121	29,034
Accrued interest and other assets	5,671,753	5,644,050
Total assets	124,577,833	119,872,757
Liabilities
Noninterest-bearing deposits	35,554,715	32,396,407
Savings and interest-checking deposits	57,956,331	54,932,162
Time deposits	5,454,341	5,757,456
Deposits at Cayman Islands office	1,217,921	1,684,044
Total deposits	100,183,308	94,770,069
Short-term borrowings	59,180	62,363
Accrued interest and other liabilities	2,198,116	2,337,490
Long-term borrowings	6,321,435	6,986,186
Total liabilities	108,762,039	104,156,108
Shareholders' equity
Preferred stock, $1.00 par, 1,000,000 shares authorized; Issued and outstanding: Liquidation preference of $1,000 per share: 350,000 shares at March 31, 2020 and December 31, 2019; Liquidation preference of $10,000 per share: 90,000 shares at March 31, 2020 and December 31, 2019	1,250,000	1,250,000
Common stock, $.50 par, 250,000,000 shares authorized, 159,741,898 shares issued at March 31, 2020 and December 31, 2019	79,871	79,871
Common stock issuable, 17,641 shares at March 31, 2020; 21,534 shares at December 31, 2019	1,292	1,566
Additional paid-in capital	6,588,407	6,593,539
Retained earnings	12,837,390	12,820,916
Accumulated other comprehensive income (loss), net	209,833	(206,680)
Treasury stock — common, at cost — 31,477,259 shares at March 31, 2020; 29,174,402 shares at December 31, 2019	(5,150,999)	(4,822,563)
Total shareholders’ equity	15,815,794	15,716,649
Total liabilities and shareholders’ equity	$ 124,577,833	$ 119,872,757