CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income	$ 133,167	$ 106,058	$ 70,424	$ 96,280	$ 239,225	$ 166,704
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization					19,922	21,510
Stock-based compensation					13,651	15,718
Provision for credit losses	37,799		82,070		100,460	127,270
Net accretion of discounts and amortization of premium on securities and borrowings					(3,618)	(1,418)
Amortization of other intangible assets	7,427		8,568		15,446	17,980
Losses on available for sale and held to maturity debt securities, net					11	11
Proceeds from sales of loans held for sale at fair value					90,628	145,310
Gains on sales of loans, net	(2,025)		(884)		(4,222)	(2,502)
Originations of loans held for sale					(80,509)	(133,348)
Gains on sales of assets, net					(187)	(3,692)
Loss on extinguishment of debt	922		0		922	0
Net change in:
Fair value of financial instruments hedged by derivative transactions					7,048	6,083
Trading debt securities					0	(6)
Lease right of use assets					(4,192)	5,506
Cash surrender value of bank owned life insurance					(10,464)	(7,748)
Accrued interest receivable					1,663	(5,669)
Other assets					151,240	(176,362)
Accrued expenses and other liabilities					(394,992)	138,165
Net cash provided by operating activities					142,032	313,512
Cash flows from investing activities:
Loans originated and purchased, net of principal collected					(680,904)	(496,413)
Equity securities:
Purchases					(6,938)	(4,691)
Sales					715	751
Held to maturity debt securities:
Purchases					(159,213)	(56,672)
Maturities, calls and principal repayments					159,870	144,552
Available for sale debt securities:
Purchases					(682,591)	(982,861)
Maturities, calls and principal repayments					209,332	49,102
Death benefit proceeds from bank owned life insurance					7,012	5,667
Proceeds from sales of real estate property and equipment					2,277	2,974
Proceeds from sales of loans not originated for sale					0	230,666
Proceeds from sale of commercial premium finance lending division					0	98,060
Purchases of real estate property and equipment					(6,154)	(6,378)
Net cash used in investing activities					(1,156,594)	(1,015,243)
Cash flows from financing activities:
Net change in deposits					647,933	869,348
Net change in short-term borrowings					89,526	(854,064)
Proceeds from issuance of long-term borrowings, net					210,000	1,000,000
Repayments of long-term borrowings					(488,000)	(65,000)
Cash dividends paid to preferred shareholders					(13,903)	(8,227)
Cash dividends paid to common shareholders					(125,248)	(114,256)
Purchase of common shares related to stock compensation plan activity					(8,615)	(8,271)
Purchase of common shares to treasury					(4,326)	0
Common stock issued, net					3,744	51
Other, net					(257)	(2)
Net cash provided by financing activities					310,854	819,579
Net change in cash and cash equivalents					(703,708)	117,848
Cash and cash equivalents at beginning of year		$ 1,890,125		$ 891,225	1,890,125	891,225
Cash and cash equivalents at end of period	$ 1,186,417		$ 1,009,073		1,186,417	1,009,073	$ 891,225
Supplemental disclosures of cash flow information:
Interest on deposits and borrowings					769,206	891,336
Federal and state income taxes					34,099	48,252
Supplemental schedule of non-cash investing activities:
Transfer of loans to other real estate owned, net					832	8,059
Transfer of loans to loans held for sale, net					10,200	34,143	$ 10,000
Lease right of use assets obtained in exchange for operating lease liabilities					$ 22,866	$ 15,429