Allowance for Credit Losses - Allowance and Loans by Impairment Methodology (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance balance attributable to loans:
Individually evaluated for impairment		$ 51
Collectively evaluated for impairment		40,467
Total allowance	$ 39,651	40,518	$ 40,157	$ 39,156
Loans:
Individually evaluated for impairment		823
Collectively evaluated for impairment		1,633,440
Acquired loans - PCI		1,455
Total Loans		1,635,718
Residential mortgage
Allowance balance attributable to loans:
Individually evaluated for impairment		51
Collectively evaluated for impairment		2,571
Total allowance		2,622	2,660	2,914
Loans:
Individually evaluated for impairment		797
Collectively evaluated for impairment		265,170
Acquired loans - PCI		300
Total Loans		266,267
Real Estate Construction
Allowance balance attributable to loans:
Collectively evaluated for impairment		788
Total allowance		788	856	975
Loans:
Collectively evaluated for impairment		59,675
Total Loans		59,675
Commercial, Financial & Agricultural
Allowance balance attributable to loans:
Collectively evaluated for impairment		10,431
Total allowance		10,431	11,085	10,696
Loans:
Collectively evaluated for impairment		781,867
Acquired loans - PCI		1,114
Total Loans		782,981
Equity lines
Allowance balance attributable to loans:
Collectively evaluated for impairment		497
Total allowance		497	593	687
Loans:
Individually evaluated for impairment		26
Collectively evaluated for impairment		43,259
Acquired loans - PCI		15
Total Loans		43,300
Consumer
Allowance balance attributable to loans:
Collectively evaluated for impairment		211
Total allowance		211	172	371
Loans:
Collectively evaluated for impairment		8,912
Acquired loans - PCI		26
Total Loans		8,938
Consumer finance
Allowance balance attributable to loans:
Collectively evaluated for impairment		25,969
Total allowance	$ 23,578	25,969	$ 24,791	$ 23,513
Loans:
Collectively evaluated for impairment		474,557
Total Loans		$ 474,557