Parent Company Only Financial Information - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 111,680	$ 94,679
Other investment securities	63,421	51,609
Other assets	179,627	139,379
Total assets	9,157,382	7,207,304
Liabilities
Accrued expenses and other liabilities	134,189	103,804
Total liabilities	8,103,848	6,421,976
Total stockholders’ equity	1,053,534	785,328	$ 845,025	$ 575,673
Total liabilities and stockholders’ equity	9,157,382	7,207,304
Holding Company
Assets
Cash and due from banks	50	50
Interest-bearing deposits in subsidiary bank	17,099	14,961
Due from subsidiary bank	771	1,353
Other investment securities	237	234
Other assets	12,084	2,877
Total assets	1,120,085	805,713
Liabilities
Accrued expenses and other liabilities	3,342	3,336
Dividends payable	938	781
Mandatorily redeemable capital securities of subsidiary trusts and junior subordinated debentures	62,271	16,268
Total liabilities	66,551	20,385
Total stockholders’ equity	1,053,534	785,328
Total liabilities and stockholders’ equity	1,120,085	805,713
Holding Company | PEOPLES BANK
Assets
Investments in subsidiaries	1,072,238	774,294
Holding Company | Non-bank
Assets
Investments in subsidiaries	$ 17,606	$ 11,944