Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Interest Income:
Interest and fees on loans and leases	$ 775,203	$ 798,097	$ 1,530,320	$ 1,590,142
Taxable interest on investment securities	190,600	150,588	377,715	285,659
Non-taxable interest on investment securities	7,166	10,239	14,520	22,753
Loans held for sale	7	5,593	22	5,675
Other interest and dividends	27,611	11,769	51,497	23,907
Total interest income	1,000,587	976,286	1,974,074	1,928,136
Interest Expense:
Deposits	339,738	361,263	666,121	697,234
Securities sold under agreements to repurchase and federal funds purchased	218	1,114	1,894	3,222
Federal Home Loan Bank advances	29,825	33,727	53,414	71,094
Long-term debt	9,624	7,885	19,271	16,550
Total interest expense	379,405	403,989	740,700	788,100
Net interest income	621,182	572,297	1,233,374	1,140,036
Provision for credit losses	46,500	59,000	124,000	104,500
Net interest income after provision for credit losses	574,682	513,297	1,109,374	1,035,536
Non-interest Income:
Deposit service fees	40,934	41,027	79,829	83,616
Loan and lease related fees	17,657	19,334	35,278	39,101
Wealth and investment services	7,779	8,556	15,568	16,480
Cash surrender value of life insurance policies	9,172	6,359	17,164	12,305
Gain (loss) on sale of investment securities, net	0	(49,915)	220	(59,741)
Other income	19,115	16,937	39,204	49,890
Total non-interest income	94,657	42,298	187,263	141,651
Non-interest Expense:
Compensation and benefits	199,930	186,850	398,575	375,390
Occupancy	19,337	15,103	39,054	34,542
Technology and equipment	45,932	45,303	93,651	91,139
Intangible assets amortization	9,093	8,716	18,330	17,910
Marketing	5,171	4,107	9,198	8,388
Professional and outside services	18,394	14,066	35,620	27,047
Deposit insurance	15,061	15,065	31,406	39,288
Other expense	32,796	36,811	63,524	68,240
Total non-interest expense	345,714	326,021	689,358	661,944
Income before income taxes	323,625	229,574	607,279	515,243
Income tax expense	64,777	47,941	121,514	117,287
Net income	258,848	181,633	485,765	397,956
Preferred stock dividends	4,162	4,162	8,325	8,325
Income allocated to participating securities	2,991	1,977	5,361	4,090
Net income applicable to common stockholders	$ 251,695	$ 175,494	$ 472,079	$ 385,541
Earnings per common share:
Basic (in dollars per share)	$ 1.52	$ 1.03	$ 2.82	$ 2.27
Diluted (in dollars per share)	$ 1.52	$ 1.03	$ 2.81	$ 2.26