Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Operating Activities:
Net income	$ 170,987	$ 150,922
Adjustments to reconcile net income to net cash from operating activities:
Credit loss expense	6,745	13,070
Deferred tax expense (benefit)	(2,226)	(1,289)
Accretion of loan discounts	(9,669)	(7,888)
Securities premium amortization (discount accretion), net	3,766	9,945
Net (gain) loss on securities transactions	0	14
Depreciation and amortization	22,218	21,894
Net (gain) loss on sale/write-down of assets/foreclosed assets	(191)	(2,363)
Stock-based compensation	5,181	4,081
Net tax benefit from stock-based compensation	136	912
Earnings on life insurance policies	(984)	(928)
Net change in:
Trading account securities	(22)	(752)
Lease right-of-use assets	5,464	6,390
Accrued interest receivable and other assets	(42,813)	55,711
Accrued interest payable and other liabilities	78,730	(545,830)
Net cash from operating activities	237,322	(296,111)
Investing Activities:
Securities held-to-maturity - Purchases	0	(1,500)
Securities held to maturity: Maturities, calls and principal repayments	24,904	22,785
Securities available for sale:
Purchases	(5,627,169)	(5,902,064)
Sales	0	38,556
Maturities, calls and principal repayments	4,845,490	4,199,617
Proceeds from sale of loans	0	605
Net change in loans	(536,679)	(151,515)
Benefits received on life insurance policies	1,409	687
Proceeds from sales of premises and equipment	469	5
Purchases of premises and equipment	(38,605)	(40,953)
Proceeds from sales of foreclosed assets	453	15,135
Net cash from investing activities	(1,329,728)	(1,818,642)
Financing Activities:
Net change in deposits	(81,690)	(332,077)
Net change in short-term borrowings	(417,573)	128,204
Proceeds from stock option exercises	0	3,708
Purchase of treasury stock	(72,298)	(2,600)
Cash dividends paid on preferred stock	(1,669)	(1,669)
Cash dividends paid on common stock	(64,008)	(61,663)
Net cash from financing activities	(637,238)	(266,097)
Net change in cash and cash equivalents	(1,729,644)	(2,380,850)
Cash and cash equivalents at beginning of period	8,874,055	10,234,258
Cash and cash equivalents at end of period	$ 7,144,411	$ 7,853,408