Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 1,410,468	$ 1,552,743
Interest-bearing deposits at banks	33,864,824	23,663,810
Trading account	712,558	1,068,581
Investment securities (includes pledged securities that can be sold or repledged of $117,382 at June 30, 2021; $105,136 at December 31, 2020)
Available for sale (cost: $3,801,940 at June 30, 2021; $4,621,027 at December 31, 2020	3,959,783	4,822,606
Held to maturity (fair value: $1,785,014 at June 30, 2021; $1,842,281 at December 31, 2020)	1,718,198	1,748,989
Equity and other securities (cost: $463,043 at June 30, 2021; $449,008 at December 31, 2020)	465,196	474,102
Total investment securities	6,143,177	7,045,697
Loans and leases	97,487,955	98,875,788
Unearned discount	(374,523)	(339,921)
Loans and leases, net of unearned discount	97,113,432	98,535,867
Allowance for credit losses	(1,575,128)	(1,736,387)
Loans and leases, net	95,538,304	96,799,480
Premises and equipment	1,116,703	1,161,558
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	8,690	14,165
Accrued interest and other assets	7,234,871	6,701,959
Total assets	150,622,707	142,601,105
Liabilities
Noninterest-bearing deposits	55,621,230	47,572,884
Savings and interest-checking deposits	69,491,942	67,680,840
Time deposits	3,155,600	3,899,910
Deposits at Cayman Islands office		652,104
Total deposits	128,268,772	119,805,738
Short-term borrowings	91,235	59,482
Accrued interest and other liabilities	2,042,948	2,166,409
Long-term borrowings	3,499,448	4,382,193
Total liabilities	133,902,403	126,413,822
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 June 30, 2021 and December 31, 2020; Liquidation preference of $10,000 per share: 90,000 shares at June 30, 2021 and December 31, 2020	1,250,000	1,250,000
Common stock, $.50 par, 250,000,000 shares authorized, 159,741,898 shares issued at June 30, 2021 and December 31, 2020	79,871	79,871
Common stock issuable, 15,568 shares at June 30, 2021; 18,113 shares at December 31, 2020	1,179	1,344
Additional paid-in capital	6,620,528	6,617,404
Retained earnings	14,030,215	13,444,428
Accumulated other comprehensive income (loss), net	(176,974)	(63,032)
Treasury stock — common, at cost — 31,070,980 shares at June 30, 2021; 31,426,742 shares at December 31, 2020	(5,084,515)	(5,142,732)
Total shareholders’ equity	16,720,304	16,187,283
Total liabilities and shareholders’ equity	$ 150,622,707	$ 142,601,105