Consolidated Statement of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Interest income
Loans	$ 2,104,000	$ 2,153,000	$ 6,164,000	$ 6,378,000
Investment securities	377,000	283,000	1,047,000	771,000
Deposits at banks	198,000	348,000	635,000	1,167,000
Other	1,000	1,000	3,000	3,000
Total interest income	2,680,000	2,785,000	7,849,000	8,319,000
Interest expense
Savings and interest-checking deposits	589,000	655,000	1,720,000	1,888,000
Time deposits	119,000	180,000	366,000	622,000
Short-term borrowings	32,000	57,000	101,000	210,000
Long-term borrowings	179,000	167,000	493,000	475,000
Total interest expense	919,000	1,059,000	2,680,000	3,195,000
Net interest income	1,761,000	1,726,000	5,169,000	5,124,000
Provision for credit losses	125,000	120,000	380,000	470,000
Net interest income after provision for credit losses	1,636,000	1,606,000	4,789,000	4,654,000
Other income
Mortgage banking revenues	147,000	109,000	395,000	319,000
Service charges on deposit accounts	141,000	132,000	411,000	383,000
Trust income	181,000	170,000	540,000	500,000
Brokerage services income	34,000	32,000	97,000	91,000
Trading account and other non-hedging derivative gains	18,000	13,000	39,000	29,000
Gain (loss) on bank investment securities	1,000	(2,000)	1,000	(8,000)
Other revenues from operations	230,000	152,000	563,000	456,000
Total other income	752,000	606,000	2,046,000	1,770,000
Other expense
Salaries and employee benefits	833,000	775,000	2,533,000	2,372,000
Equipment and net occupancy	129,000	125,000	391,000	379,000
Outside data processing and software	138,000	123,000	412,000	367,000
Professional and other services	81,000	88,000	251,000	264,000
FDIC assessments	13,000	25,000	58,000	122,000
Advertising and marketing	23,000	27,000	70,000	74,000
Amortization of core deposit and other intangible assets	10,000	12,000	32,000	40,000
Other costs of operations	136,000	128,000	367,000	378,000
Total other expense	1,363,000	1,303,000	4,114,000	3,996,000
Income before taxes	1,025,000	909,000	2,721,000	2,428,000
Income taxes	233,000	188,000	629,000	521,000
Net income	792,000	721,000	2,092,000	1,907,000
Net income available to common shareholders
Basic	754,000	674,000	1,981,000	1,805,000
Diluted	$ 754,000	$ 674,000	$ 1,981,000	$ 1,805,000
Net income per common share
Basic (in USD per share)	$ 4.85	$ 4.04	$ 12.41	$ 10.83
Diluted (in USD per share)	$ 4.82	$ 4.02	$ 12.34	$ 10.78
Average common shares outstanding
Basic (in shares)	155,558	166,671	159,631	166,694
Diluted (in shares)	156,553	167,567	160,503	167,437