Consolidated Balance Sheet (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 1,479,712	$ 1,552,743
Interest-bearing deposits at banks	38,445,788	23,663,810
Trading account	624,556	1,068,581
Investment securities (includes pledged securities that can be sold or repledged of $118,178 at September 30, 2021; $105,136 at December 31, 2020)
Available for sale (cost: $3,473,923 at September 30, 2021; $4,621,027 at December 31, 2020	3,618,106	4,822,606
Held to maturity (fair value: $2,413,938 at September 30, 2021; $1,842,281 at December 31, 2020)	2,359,727	1,748,989
Equity and other securities (cost: $467,349 at September 30, 2021; $449,008 at December 31, 2020)	469,789	474,102
Total investment securities	6,447,622	7,045,697
Loans and leases	93,872,912	98,875,788
Unearned discount	(290,018)	(339,921)
Loans and leases, net of unearned discount	93,582,894	98,535,867
Allowance for credit losses	(1,515,024)	(1,736,387)
Loans and leases, net	92,067,870	96,799,480
Premises and equipment	1,117,903	1,161,558
Goodwill	4,593,112	4,593,112
Core deposit and other intangible assets	5,952	14,165
Accrued interest and other assets	7,118,679	6,701,959
Total assets	151,901,194	142,601,105
Liabilities
Noninterest-bearing deposits	56,542,309	47,572,884
Savings and interest-checking deposits	69,195,960	67,680,840
Time deposits	2,963,027	3,899,910
Deposits at Cayman Islands office		652,104
Total deposits	128,701,296	119,805,738
Short-term borrowings	103,548	59,482
Accrued interest and other liabilities	2,067,188	2,166,409
Long-term borrowings	3,500,391	4,382,193
Total liabilities	134,372,423	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 September 30, 2021 and December 31, 2020; Liquidation preference of $10,000 per share: 140,000 shares at September 30, 2021 and 90,000 shares at December 31, 2020	1,750,000	1,250,000
Common stock, $.50 par, 250,000,000 shares authorized, 159,741,898 shares issued at September 30, 2021 and December 31, 2020	79,871	79,871
Common stock issuable, 15,683 shares at September 30, 2021; 18,113 shares at December 31, 2020	1,196	1,344
Additional paid-in capital	6,624,656	6,617,404
Retained earnings	14,365,913	13,444,428
Accumulated other comprehensive income (loss), net	(210,419)	(63,032)
Treasury stock — common, at cost — 31,058,333 shares at September 30, 2021; 31,426,742 shares at December 31, 2020	(5,082,446)	(5,142,732)
Total shareholders’ equity	17,528,771	16,187,283
Total liabilities and shareholders’ equity	$ 151,901,194	$ 142,601,105