CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Interest income
Interest and fees on loans	$ 768,362	$ 710,341
Mortgage loans held-for-sale	4,246	4,146
Interest-bearing deposits with banks	36,766	16,658
Federal funds sold and securities purchased under resale agreements	179	19
Investment securities	72,016	69,678
Trading account securities	11	18
Federal Home Loan Bank and Federal Reserve Bank stock	5,307	4,478
Brokerage customer receivables	78	175
Total interest income	886,965	805,513
Interest expense
Interest on deposits	320,233	299,532
Interest on Federal Home Loan Bank advances	25,441	22,048
Interest on other borrowings	6,792	9,248
Interest on subordinated notes	3,714	5,487
Interest on junior subordinated debentures	4,311	5,004
Total interest expense	360,491	341,319
Net interest income	526,474	464,194
Provision for credit losses	23,963	21,673
Net interest income after provision for credit losses	502,511	442,521
Non-interest income
Wealth management	34,042	34,815
Mortgage banking	20,529	27,663
Service charges on deposit accounts	19,362	14,811
Gains on investment securities, net	3,196	1,326
Fees from covered call options	3,446	4,847
Trading (losses) gains, net	(64)	677
Operating lease income, net	15,287	14,110
Other	20,836	42,331
Total non-interest income	116,634	140,580
Non-interest expense
Salaries and employee benefits	211,526	195,173
Software and equipment	34,717	27,731
Operating lease equipment	10,471	10,683
Occupancy, net	20,778	19,086
Data processing	11,274	9,292
Advertising and marketing	12,272	13,040
Professional fees	9,044	9,553
Amortization of other acquisition-related intangible assets	5,618	1,158
FDIC insurance	10,926	14,537
Other real estate owned expense, net	643	392
Other	38,821	32,500
Total non-interest expense	366,090	333,145
Income before taxes	253,055	249,956
Income tax expense	64,016	62,662
Net income	189,039	187,294
Preferred stock dividends	6,991	6,991
Net income applicable to common shares	$ 182,048	$ 180,303
Net income per common share-Basic (usd per share)	$ 2.73	$ 2.93
Net income per common share-Diluted (usd per share)	2.69	2.89
Cash dividends declared per common share (usd per share)	$ 0.50	$ 0.45
Weighted average common shares outstanding (in shares)	66,726	61,481
Dilutive potential common shares (in shares)	923	928
Average common shares and dilutive common shares (in shares)	67,649	62,409