Consolidated Statement of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest income
Loans and leases, including fees	$ 1,455,612	$ 944,422	$ 3,572,954	$ 2,843,969
Investment securities
Fully taxable	135,766	33,209	294,290	104,736
Exempt from federal taxes	16,555	48	34,388	113
Deposits at banks	172,956	14,923	272,009	30,507
Other	624	344	1,270	941
Total interest income	1,781,513	992,946	4,174,911	2,980,266
Interest expense
Savings and interest-checking deposits	68,690	7,000	103,344	26,556
Time deposits	1,124	3,573	3,748	15,667
Deposits at Cayman Islands office				201
Short-term borrowings	2,670	2	6,090	5
Long-term borrowings	30,338	15,121	67,147	46,852
Total interest expense	102,822	25,696	180,329	89,281
Net interest income	1,678,691	967,250	3,994,582	2,890,985
Provision for credit losses	115,000	(20,000)	427,000	(60,000)
Net interest income after provision for credit losses	1,563,691	987,250	3,567,582	2,950,985
Other income
Brokerage services income	21,086	20,490	65,414	43,868
Trading account and non-hedging derivative gains	5,081	5,563	12,743	18,349
Gain/(loss) on bank investment securities	(1,108)	291	(1,913)	(22,646)
Other revenues from operations	153,189	120,485	436,943	344,114
Total other income	563,079	569,126	1,675,066	1,588,357
Other expense
Salaries and employee benefits	736,354	510,422	2,090,075	1,530,634
Equipment and net occupancy	127,117	80,738	337,584	244,057
Outside data processing and software	95,068	72,782	268,607	213,025
FDIC assessments	28,105	18,810	66,266	50,874
Advertising and marketing	21,398	15,208	58,057	43,200
Printing, postage and supplies	14,768	7,917	40,488	28,367
Amortization of core deposit and other intangible assets	18,384	2,738	38,024	8,213
Other costs of operations	238,059	190,719	743,047	565,753
Total other expense	1,279,253	899,334	3,642,148	2,684,123
Income before taxes	847,517	657,042	1,600,500	1,855,219
Income taxes	200,921	161,582	374,208	454,441
Net income	646,596	495,460	1,226,292	1,400,778
Net income available to common shareholders
Basic	620,549	475,958	1,152,400	1,342,805
Diluted	$ 620,554	$ 475,961	$ 1,152,406	$ 1,342,812
Net income per common share
Basic	$ 3.55	$ 3.70	$ 7.18	$ 10.44
Diluted	$ 3.53	$ 3.69	$ 7.14	$ 10.43
Average common shares outstanding
Basic	174,609	128,689	160,474	128,632
Diluted	175,682	128,844	161,295	128,786
Mortgage Banking Revenues [Member]
Other income
Revenue from contract with customer	$ 83,041	$ 159,995	$ 275,115	$ 432,062
Service Charges on Deposit Accounts [Member]
Other income
Revenue from contract with customer	115,213	105,426	340,890	296,721
Trust Income [Member]
Other income
Revenue from contract with customer	$ 186,577	$ 156,876	$ 545,874	$ 475,889