Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interest income:
Interest and fees on loans and leases	$ 3,182,466	$ 3,071,378	$ 1,946,558
Taxable interest on investment securities	636,177	396,681	269,233
Non-taxable interest on investment securities	38,758	54,207	50,442
Loans held for sale	13,911	734	78
Other interest and dividends	55,974	105,260	18,426
Total interest income	3,927,286	3,628,260	2,284,737
Interest expense:
Deposits	1,427,204	1,021,418	138,552
Securities sold under agreements to repurchase and federal funds purchased	4,113	9,102	19,059
Federal Home Loan Bank advances	125,329	222,537	58,557
Long-term debt	32,253	37,934	34,283
Total interest expense	1,588,899	1,290,991	250,451
Net interest income	2,338,387	2,337,269	2,034,286
Provision for credit losses	222,000	150,747	280,619
Net interest income after provision for credit losses	2,116,387	2,186,522	1,753,667
Non-interest income:
Deposit service fees	161,144	169,318	198,472
Loan and lease related fees	76,384	84,861	102,987
Wealth and investment services	33,234	28,999	40,277
Cash surrender value of life insurance policies	27,712	26,228	29,237
(Loss) on sale of investment securities, net	(136,224)	(33,620)	(6,751)
Other income	89,649	38,551	76,561
Total non-interest income	251,899	314,337	440,783
Non-interest expense:
Compensation and benefits	762,794	711,752	723,620
Occupancy	72,161	77,520	113,899
Technology and equipment	195,017	197,928	186,384
Intangible assets amortization	36,082	36,207	31,940
Marketing	18,751	18,622	16,438
Professional and outside services	58,253	107,497	117,530
Deposit insurance	68,912	98,081	26,574
Other expense	139,309	168,748	180,088
Total non-interest expense	1,351,279	1,416,355	1,396,473
Income before income taxes	1,017,007	1,084,504	797,977
Income tax expense	248,300	216,664	153,694
Net income	768,707	867,840	644,283
Preferred stock dividends	16,650	16,650	15,919
Net income available to common stockholders	$ 752,057	$ 851,190	$ 628,364
Earnings per common share:
Basic (in dollars per share)	$ 4.38	$ 4.91	$ 3.72
Diluted (in dollars per share)	$ 4.37	$ 4.91	$ 3.72