Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities
Net income	$ 1,991,663	$ 1,858,746	$ 1,353,152
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	517,000	(75,000)	800,000
Depreciation and amortization of premises and equipment	282,056	224,274	220,598
Amortization of capitalized servicing rights	96,463	89,767	84,821
Amortization of core deposit and other intangible assets	55,624	10,167	14,869
Provision for deferred income taxes	(29,987)	87,159	(31,291)
Asset write-downs	8,471	8,431	21,014
Net gain on sales of assets	(153,491)	(10,308)	(19,441)
Net change in accrued interest receivable, payable	(122,755)	65,724	(132,252)
Net change in other accrued income and expense	(69,993)	52,540	(418,752)
Net change in loans originated for sale	771,458	(163,623)	(542,078)
Net change in trading account and non-hedging derivative assets and liabilities	1,227,231	567,082	(561,453)
Net cash provided by operating activities	4,573,740	2,714,959	789,187
Cash flows from investing activities
Proceeds from sales of investment securities equity and other	242,596	17,654	67,036
Proceeds from maturities of investment securities Available for sale	795,157	1,433,793	1,614,557
Proceeds from maturities of investment securities Held to maturity	1,515,623	615,201	911,555
Purchases of investment securities Available for sale	(7,221,885)	(677,916)	(7,581)
Purchases of investment securities Held to maturity	(1,889,954)	(1,601,698)	(11,993)
Purchases of investment securities equity and other	(456,024)	(30,153)	(29,004)
Net (increase) decrease in loans and leases	(3,639,040)	5,676,670	(7,231,694)
Net (increase) decrease in interest-bearing deposits at banks	26,106,931	(18,208,494)	(16,473,656)
Capital expenditures, net	(214,388)	(149,213)	(172,289)
Net (increase) decrease in loan servicing advances	1,578,825	(197,141)	(754,823)
Acquisition, net of cash consideration, Bank and bank holding company	393,923
Other, net	(619,028)	(510,302)	67,411
Net cash provided (used) by investing activities	16,592,736	(13,631,599)	(22,020,481)
Cash flows from financing activities
Net increase (decrease) in deposits	(20,993,952)	11,737,671	25,037,167
Net increase (decrease) in short-term borrowings	2,613,036	(12,436)	(2,881)
Proceeds from long-term borrowings	998,540	9,500
Payments on long-term borrowings	(907,240)	(853,091)	(2,665,023)
Purchases of treasury stock	(1,800,000)		(373,750)
Dividends paid — common	(784,089)	(580,260)	(568,112)
Dividends paid — preferred	(96,927)	(68,200)	(68,256)
Proceeds from issuance of Series I preferred stock		495,000
Other, net	(13,177)	(26,710)	(11,413)
Net cash provided (used) by financing activities	(20,983,809)	10,701,474	21,347,732
Net increase (decrease) in cash, cash equivalents and restricted cash	182,667	(215,166)	116,438
Cash, cash equivalents and restricted cash at beginning of period	1,337,577	1,552,743	1,436,305
Cash, cash equivalents and restricted cash at end of period	1,520,244	1,337,577	1,552,743
Supplemental disclosure of cash flow information
Interest received during the period	6,134,684	3,976,804	4,135,990
Interest paid during the period	428,772	139,164	372,291
Income taxes paid during the period	487,618	314,295	275,558
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	31,376	8,851	20,646
Additions to right-of-use assets under operating leases	137,998	57,760	$ 70,754
Loans held for sale transferred to loans held for investment		$ 330,188
Acquisition of bank and bank holding company, Common stock issued	8,286,515
Acquisition of bank and bank holding company, Common stock awards converted	104,810
Fair value of Assets acquired (noncash)	63,757,316
Fair value of Liabilities assumed	55,499,314
Fair value of Preferred stock converted	$ 260,600