Consolidated Balance Sheet - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 1,432,805	$ 1,605,439
Interest-bearing deposits at banks	7,190,154	8,105,197
Federal funds sold	3,500
Trading account	470,129	185,584
Investment securities (includes pledged securities that can be sold or repledged of $200,339 at December 31, 2019; $487,365 at December 31, 2018)
Available for sale (cost: $6,258,276 at December 31, 2019; $8,869,423 at December 31, 2018)	6,318,776	8,682,509
Held to maturity (fair value: $2,699,206 at December 31, 2019; $3,255,483 at December 31, 2018)	2,656,917	3,316,640
Equity and other securities (cost: $487,041 at December 31, 2019; $677,187 at December 31, 2018)	521,558	693,664
Total investment securities	9,497,251	12,692,813
Loans and leases	91,188,525	88,733,492
Unearned discount	(265,656)	(267,015)
Loans and leases, net of unearned discount	90,922,869	88,466,477
Allowance for credit losses	(1,051,071)	(1,019,444)
Loans and leases, net	89,871,798	87,447,033
Premises and equipment	1,140,924	647,408
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	29,034	47,067
Accrued interest and other assets	5,644,050	4,773,750
Total assets	119,872,757	120,097,403
Liabilities
Noninterest-bearing deposits	32,396,407	32,256,668
Savings and interest-checking deposits	54,932,162	50,963,744
Time deposits	5,757,456	6,124,254
Deposits at Cayman Islands office	1,684,044	811,906
Total deposits	94,770,069	90,156,572
Short-term borrowings	62,363	4,398,378
Accrued interest and other liabilities	2,337,490	1,637,348
Long-term borrowings	6,986,186	8,444,914
Total liabilities	104,156,108	104,637,212
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 December 31, 2019 and 731,500 shares at December 31, 2018; Liquidation preference of $10,000 per share: 90,000 shares at December 31, 2019 and 50,000 shares at December 31, 2018	1,250,000	1,231,500
Common stock, $.50 par, 250,000,000 shares authorized, 159,741,898 shares issued at December 31, 2019; 159,765,044 shares issued at December 31, 2018	79,871	79,883
Common stock issuable, 21,534 shares at December 31, 2019; 24,563 shares at December 31, 2018	1,566	1,726
Additional paid-in capital	6,593,539	6,579,342
Retained earnings	12,820,916	11,516,672
Accumulated other comprehensive income (loss), net	(206,680)	(420,081)
Treasury stock — common, at cost — 29,174,402 shares at December 31, 2019; 21,255,275 shares at December 31, 2018	(4,822,563)	(3,528,851)
Total shareholders’ equity	15,716,649	15,460,191
Total liabilities and shareholders’ equity	$ 119,872,757	$ 120,097,403