Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Cash Flows from Operating Activities
Net income	$ 274,269	$ 224,607
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	58,033	55,431
Provision for losses on other real estate owned	0	890
Deferred tax provision	10,245	10,007
Depreciation and amortization	5,053	5,184
Amortization of right-of-use asset	7,196	7,045
Change in operating lease liabilities	1,268	2,228
Net gains on sales and transfers of other real estate owned	(1,095)	(2,968)
Net (gains)/losses on sales of loans	(305)	57
Losses on sales or disposal of premises and equipment	28	63
Amortization on alternative energy partnerships, venture capital and other investments	23,080	32,382
Net losses on sales of investment securities	41,323	(0)
Amortization/accretion of securities available-for-sale premiums/discounts, net	(23,970)	(19,721)
Unrealized (gains)/ losses on equity securities	(65,021)	2,318
Stock-based compensation and stock issued to officers as compensation	6,672	5,711
Net change in accrued interest receivable and other assets	(42,406)	22,830
Net change in other liabilities	123,154	(32,557)
Net cash provided by operating activities	417,524	313,507
Cash Flows from Investing Activities
Purchases of securities available-for-sale	(1,890,016)	(1,289,400)
Proceeds from repayments, maturities and calls of securities available-for-sale	1,531,089	1,249,581
Proceeds from sales of securities available-for-sale	419,010	0
Proceeds from sales of other real estate owned	8,945	10,316
Proceeds from sales of loans originally classified as held-for-investment	11,292	42,134
Net increase in loans	(1,106,491)	(820,318)
Purchases of premises and equipment	(7,261)	(4,455)
Net (increase)/decrease in affordable housing investments and alternative energy partnerships	(31,706)	2,004
Net cash used for investing activities	(1,065,138)	(810,138)
Cash Flows from Financing Activities
Increase in deposits	940,823	834,819
Advances from Federal Home Loan Bank	11,406,000	10,145,000
Repayments of Federal Home Loan Bank borrowings	(11,206,000)	(10,015,000)
Repayments of Trust Preferred Securities	(54,125)	0
Cash dividends paid	(76,093)	(70,944)
Purchases of treasury stock	(77,505)	(127,923)
Proceeds from shares issued under Dividend Reinvestment Plan	1,988	1,970
Taxes paid related to net share settlement of RSUs	(3,878)	(2,758)
Net cash provided by financing activities	931,210	765,164
Increase in cash, cash equivalents, and restricted cash	283,596	268,533
Cash, cash equivalents, and restricted cash, beginning of the period	1,424,409	1,039,520
Cash, cash equivalents, and restricted cash, end of the period	1,708,005	1,308,053
Supplemental Cash Flow Information
Interest	392,034	433,983
Income taxes	82,443	43,410
Non-cash investing and financing activities:
Net change in unrealized holding gains on securities available-for-sale, net of tax	5,904	25,909
Loans transferred from held-for-investment to held-for-sale	24,583	51,128
Transfers to other real estate owned from loans held-for-investment	$ 4,142	$ 10,351