CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income	$ 106,058	$ 96,280
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	9,892	10,794
Stock-based compensation	6,840	8,104
Provision for credit losses	62,661	45,200
Net accretion of discounts and amortization of premium on securities and borrowings	(1,827)	(779)
Amortization of other intangible assets	8,019	9,412
Losses on available for sale and held to maturity debt securities, net	11	7
Proceeds from sales of loans held for sale at fair value	47,094	41,650
Gains on sales of loans, net	(2,197)	(1,618)
Originations of loans held for sale	(37,437)	(37,581)
Gains on sales of assets, net	(43)	(3,694)
Net change in:
Fair value of financial instruments hedged by derivative transactions	4,693	3,540
Trading debt securities	0	(16)
Lease right of use assets	(5,710)	7,123
Cash surrender value of bank owned life insurance	(4,777)	(3,235)
Accrued interest receivable	1,615	(8,395)
Other assets	85,015	(184,680)
Accrued expenses and other liabilities	(297,029)	117,399
Net cash (used in) provided by operating activities	(17,122)	99,511
Cash flows from investing activities:
Loans originated and purchased, net of principal collected	88,203	(67,432)
Equity securities:
Purchases	(3,045)	(957)
Sales	427	408
Held to maturity debt securities:
Purchases	(89,352)	(39,639)
Maturities, calls and principal repayments	75,678	67,777
Available for sale debt securities:
Purchases	(341,315)	(183,924)
Maturities, calls and principal repayments	91,660	18,338
Death benefit proceeds from bank owned life insurance	3,226	3,620
Proceeds from sales of real estate property and equipment	2,255	2,850
Proceeds from sales of loans not originated for sale	0	196,523
Proceeds from sale of commercial premium finance lending division	0	98,060
Purchases of real estate property and equipment	(3,047)	(3,639)
Net cash (used in) provided by investing activities	(175,310)	91,985
Cash flows from financing activities:
Net change in deposits	(111,529)	(164,883)
Net change in short-term borrowings	(13,692)	(842,610)
Proceeds from issuance of long-term borrowings, net	0	1,000,000
Repayments of long-term borrowings	(273,000)	(65,000)
Cash dividends paid to preferred shareholders	(6,956)	(4,119)
Cash dividends paid to common shareholders	(62,930)	(57,944)
Purchase of common shares related to stock compensation plan activity	(7,037)	(7,381)
Purchase of common shares to treasury	(2,162)	0
Common stock issued, net	3,405	51
Other, net	(95)	(2)
Net cash used in financing activities	(473,996)	(141,888)
Net change in cash and cash equivalents	(666,428)	49,608
Cash and cash equivalents at beginning of year	1,890,125	891,225
Cash and cash equivalents at end of period	1,223,697	940,833	$ 891,225
Supplemental disclosures of cash flow information:
Interest on deposits and borrowings	403,276	485,127
Federal and state income taxes	13,044	6,487
Supplemental schedule of non-cash investing activities:
Transfer of loans to other real estate owned, net	694	0
Financing receivable, reclassification to held-for-sale	10,200	34,143	$ 10,000
Lease right of use assets obtained in exchange for operating lease liabilities	$ 14,886	$ 4,809