Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net income	$ 362,174	$ 447,249
Adjustments to reconcile net income to net cash provided by operating activities
Provision for credit losses	10,000	(25,000)
Depreciation and amortization of premises and equipment	56,739	57,116
Amortization of capitalized servicing rights	25,316	19,951
Amortization of core deposit and other intangible assets	1,256	2,738
Provision for deferred income taxes	4,151	39,329
Asset write-downs	252	1,217
Net gain on sales of assets	(4,768)	(2,106)
Net change in accrued interest receivable, payable	15,748	(36,893)
Net change in other accrued income and expense	(99,163)	(27,301)
Net change in loans originated for sale	434,520	158,878
Net change in trading account assets and liabilities	489,545	359,559
Net cash provided by operating activities	1,295,770	994,737
Cash flows from investing activities
Proceeds from sales of investment securities equity and other	4,593	2,526
Proceeds from maturities of investment securities Available for sale	220,320	422,171
Proceeds from maturities of investment securities Held to maturity	120,032	171,644
Purchases of investment securities Available for sale	(2,156,662)	(1,002)
Purchases of investment securities Held to maturity	(566,119)	(201,234)
Purchases of investment securities equity and other	(10,966)	(8,801)
Net (increase) decrease in loans and leases	637,624	(988,654)
Net (increase) decrease in interest-bearing deposits at banks	5,846,922	(7,743,417)
Capital expenditures, net	(27,910)	(31,016)
Net (increase) decrease in loan servicing advances	342,947	(374,614)
Other, net	(215,201)	(179,350)
Net cash provided (used) by investing activities	4,195,580	(8,931,747)
Cash flows from financing activities
Net increase (decrease) in deposits	(5,224,696)	8,670,627
Net increase (decrease) in short-term borrowings	3,261	(525)
Payments on long-term borrowings	(49)	(852,945)
Dividends paid — common	(156,657)	(142,044)
Dividends paid — preferred	(30,718)	(21,288)
Other, net	(8,608)	(9,569)
Net cash provided (used) by financing activities	(5,417,467)	7,644,256
Net increase (decrease) in cash, cash equivalents and restricted cash	73,883	(292,754)
Cash, cash equivalents and restricted cash at beginning of period	1,337,577	1,552,743
Cash, cash equivalents and restricted cash at end of period	1,411,460	1,259,989
Supplemental disclosure of cash flow information
Interest received during the period	978,682	971,142
Interest paid during the period	40,683	55,378
Income taxes paid during the period	33,638	24,220
Supplemental schedule of noncash investing and financing activities
Real estate acquired in settlement of loans	4,598	2,301
Additions to right-of-use assets under operating leases	$ 16,468	$ 13,020