Parent Company Only Financial Information - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Financial Statements
Total interest income	$ 439,403	$ 269,554	$ 184,789
Applicable income tax expense	31,763	27,349	9,415
Net income	113,363	101,292	47,555
Holding Company
Condensed Financial Statements
Interest and other income	11	39	73
Total interest income	48,211	53,899	30,823
Trust preferred securities expense	1,147	744	367
Intercompany management fees	1,873	1,379	1,303
Other expense	11,011	6,539	5,675
Total expense	14,031	8,662	7,345
Income before federal income taxes and equity in undistributed earnings of subsidiaries	34,180	45,237	23,478
Applicable income tax expense	(3,296)	(1,979)	(1,295)
Equity in undistributed earnings of subsidiaries	75,887	54,076	22,782
Net income	113,363	101,292	47,555
Holding Company | PEOPLES BANK
Condensed Financial Statements
Dividends from subsidiary bank	48,000	52,000	29,000
Holding Company | Non-bank
Condensed Financial Statements
Dividends from subsidiary bank	$ 200	$ 1,860	$ 1,750