CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Activities
Net income	$ 123,210	$ 117,979	$ 119,294
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	941	18,392	8,309
Depreciation, amortization and accretion, net	19,948	19,630	32,625
Equity in undistributed earnings of merchant banking subsidiaries	(9,161)	(9,062)	(3,486)
Deferred income taxes	(19,535)	7,004	8,184
Other, net	4,114	14,185	15,257
Net change in securities purchased under agreements to resell	(8,717)	38,059	192
Net change in trading securities	25,288	239,041	(107,034)
Net change in broker-dealer and clearing organization receivables	102,019	(448,825)	936,861
Net change in other assets	42,195	25,016	(7,134)
Net change in broker-dealer and clearing organization payables	(64,509)	413,622	(734,242)
Net change in other liabilities	(10,886)	(2,942)	54,123
Net change in securities sold, not yet purchased	22,362	(18,151)	(43,563)
Proceeds from sale of mortgage servicing rights asset	87,268	19,055	65,108
Change in valuation of mortgage servicing rights asset	15,083	12,467	(21,969)
Net gains from sales of loans	(190,021)	(172,150)	(302,384)
Loans originated for sale	(10,007,122)	(9,485,477)	(14,214,874)
Proceeds from loans sold	10,141,455	9,655,180	15,384,181
Net cash provided by operating activities	273,932	443,023	1,189,448
Investing Activities
Proceeds from maturities and principal reductions of securities held to maturity	81,969	68,882	95,603
Proceeds from sales, maturities and principal reductions of securities available for sale	235,722	249,520	329,558
Proceeds from sales, maturities and principal reductions of equity securities	12,663
Purchases of securities held to maturity			(13,180)
Purchases of securities available for sale	(116,117)	(65,165)	(768,461)
Purchases of equity securities	(1,475)	(19,914)	(30)
Net change in loans held for investment	110,916	(71,419)	(515,326)
Purchases of premises and equipment and other assets	(7,131)	(8,488)	(9,798)
Proceeds from sales of premises and equipment, other real estate owned, and other assets	7,646	4,260	4,544
Proceeds from sale of loans held for sale transferred from loans held for investment	30,103
Net cash received from (paid to) Federal Home Loan Bank and Federal Reserve Bank stock	(75)	662	(212)
Net cash provided by (used in) investing activities	354,221	158,338	(877,302)
Financing Activities
Net change in deposits	(32,193)	(201,915)	(1,278,916)
Net change in short-term borrowings	(93,157)	(70,929)	108,369
Proceeds from long-term borrowings	918,713	490,151	821,570
Payments on long-term borrowings	(890,886)	(490,151)	(863,284)
Payments to repurchase common stock	(19,864)	(5,100)	(442,336)
Dividends paid on common stock	(44,257)	(41,604)	(42,963)
Net cash distributed to noncontrolling interest	(9,012)	(7,576)	(6,090)
Other, net	(3,652)	(5,391)	(5,860)
Net cash used in financing activities	(174,308)	(332,515)	(1,709,510)
Net change in cash, cash equivalents and restricted cash	453,845	268,846	(1,397,364)
Cash, cash equivalents and restricted cash, beginning of period	1,916,745	1,647,899	3,045,263
Cash, cash equivalents and restricted cash, end of period	2,370,590	1,916,745	1,647,899
Supplemental Disclosures of Cash Flow Information
Cash paid for interest	426,777	357,403	128,414
Cash paid for income taxes, net of refunds	44,228	19,060	15,088
Supplemental Schedule of Non-Cash Activities
Conversion of loans to other real estate owned	3,001	5,638	1,251
Additions to mortgage servicing rights	$ 11,412	$ 27,359	$ 56,974