CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating Activities
Net income	$ 92,716	$ 321,300
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for (reversal of) credit losses	4,671	(39,648)
Depreciation, amortization and accretion, net	20,207	18,393
Deferred income taxes	2,258	(382)
Other, net	11,814	14,049
Net change in securities purchased under agreements to resell	(27,103)	(75,589)
Net change in trading securities	6,134	84,442
Net change in broker-dealer and clearing organization receivables	748,584	(223,819)
Net change in other assets	(52,021)	(50,625)
Net change in broker-dealer and clearing organization payables	(470,426)	152,755
Net change in other liabilities	66,479	(105,402)
Net change in securities sold, not yet purchased	2,929	33,275
Proceeds from sale of mortgage servicing rights asset	1,876	116,000
Change in valuation of mortgage servicing rights asset	(23,575)	(12,821)
Net gains from sales of loans	(266,435)	(669,857)
Loans originated for sale	(11,706,056)	(21,563,008)
Proceeds from loans sold	12,823,759	22,874,493
Net cash provided by operating activities	1,235,811	873,556
Investing Activities
Proceeds from maturities and principal reductions of securities held to maturity	78,144	34,082
Proceeds from sales, maturities and principal reductions of securities available for sale	259,774	507,365
Purchases of securities held to maturity	(11,432)
Purchases of securities available for sale	(625,522)	(1,075,154)
Purchases of equity securities	(30)
Net change in loans held for investment	(391,040)	360,518
Purchases of premises and equipment and other assets	(7,335)	(22,079)
Proceeds from sales of premises and equipment and other real estate owned	1,808	4,252
Net cash paid to Federal Home Loan Bank and Federal Reserve Bank stock	(175)	(82)
Net cash used in investing activities	(695,808)	(191,098)
Financing Activities
Net change in deposits	(1,296,781)	865,638
Net change in short-term borrowings	82,178	51,203
Proceeds from notes payable	638,498	739,372
Payments on notes payable and junior subordinated debentures	(636,394)	(792,893)
Payments to repurchase common stock	(442,336)	(123,631)
Dividends paid on common stock	(33,457)	(29,500)
Net cash distributed to noncontrolling interest	(4,601)	(9,727)
Other, net	(4,768)	(3,200)
Net cash provided by (used in) financing activities	(1,697,661)	697,262
Net change in cash, cash equivalents and restricted cash	(1,157,658)	1,379,720
Cash, cash equivalents and restricted cash, beginning of period	3,045,263	1,353,303
Cash, cash equivalents and restricted cash, end of period	1,887,605	2,733,023
Supplemental Disclosures of Cash Flow Information
Cash paid for interest	69,681	85,069
Cash paid for income taxes, net of refunds	14,956	83,129
Supplemental Schedule of Non-Cash Activities
Conversion of loans to other real estate owned	326	2,924
Additions to mortgage servicing rights	47,850	$ 70,368
Carrying amount of AFS securities transferred to HTM, net of $67,798 unrealized loss	$ 689,477