Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Interest income:
Loans	$ 712,377	$ 708,386
Investment securities	237,258	151,489
Interest-bearing cash and bank deposits	40,313	45,102
Total interest income	989,948	904,977
Interest expense:
Deposits	175,200	190,432
Federal funds purchased and customer repurchase agreements	25,083	27,221
Total interest expense	200,283	217,653
Net interest income	789,665	687,324
Provision for credit losses	9,311	14,587
Net interest income after provision for credit losses	780,354	672,737
Other income:
Mortgage banking revenue	39,571	42,080
Investment securities losses, net	(6,811)	(36,661)
Other (loss) income	(6,917)	9,667
Total other income	231,694	210,390
Other expenses:
Salaries and employee benefits	298,080	281,087
Net occupancy and equipment	48,990	47,131
Computer software and maintenance	22,556	20,318
Marketing and business development	20,670	19,990
Legal and professional fees	22,403	26,290
Bankcard processing, rewards and related cost	30,747	32,002
Other expenses	62,044	62,589
Total other expenses	505,490	489,407
Income before income taxes	506,558	393,720
Income taxes	115,705	87,910
Net income	$ 390,853	$ 305,810
Net income per common share - basic (in dollars per share)	$ 1.75	$ 1.39
Net income per common share - diluted (in dollars per share)	$ 1.75	$ 1.39
Service charges and commissions
Other income:
Other income revenues	$ 57,631	$ 56,137
Service Revenue
Other income:
Other income revenues	67,570	67,531
Brokerage services
Other income:
Other income revenues	28,696	25,739
Fees for fiduciary services
Other income:
Other income revenues	$ 51,954	$ 45,897