Loans and Allowance for Loan Losses - Credit Quality (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	$ 1,333,923	$ 1,302,133
Watch
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	65,040	69,056
Substandard
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	20,246	12,012
Performing TDRs
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	1,691	1,795
Non-accrual loans
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	17,096	25,459
Loans In Risk Categories
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	104,073	108,322
Commercial, Financial, & Agricultural
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	221,015	217,214
Commercial, Financial, & Agricultural | Watch
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	8,618	9,219
Commercial, Financial, & Agricultural | Substandard
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	6,143	6,284
Commercial, Financial, & Agricultural | Performing TDRs
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	183	188
Commercial, Financial, & Agricultural | Non-accrual loans
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	136	153
Commercial, Financial, & Agricultural | Loans In Risk Categories
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	15,080	15,844
Residential real estate | Construction
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	21,515	27,920
Residential real estate | Construction | Watch
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	0	0
Residential real estate | Construction | Substandard
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	0	0
Residential real estate | Construction | Performing TDRs
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	0	0
Residential real estate | Construction | Non-accrual loans
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	0	0
Residential real estate | Construction | Loans In Risk Categories
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	0	0
Residential real estate | Mortgages
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	287,879	279,346
Residential real estate | Mortgages | Watch
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	12,061	12,185
Residential real estate | Mortgages | Substandard
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	537	750
Residential real estate | Mortgages | Performing TDRs
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	1,170	1,262
Residential real estate | Mortgages | Non-accrual loans
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	1,258	1,129
Residential real estate | Mortgages | Loans In Risk Categories
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	15,026	15,326
Commercial real estate | Construction
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	103,478	91,369
Commercial real estate | Construction | Watch
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	2,897	4,304
Commercial real estate | Construction | Substandard
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	2,673	2,673
Commercial real estate | Construction | Performing TDRs
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	0	0
Commercial real estate | Construction | Non-accrual loans
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	100	105
Commercial real estate | Construction | Loans In Risk Categories
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	5,670	7,082
Commercial real estate | Mortgages
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	677,539	663,256
Commercial real estate | Mortgages | Watch
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	41,464	43,348
Commercial real estate | Mortgages | Substandard
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	10,893	2,305
Commercial real estate | Mortgages | Performing TDRs
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	323	328
Commercial real estate | Mortgages | Non-accrual loans
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	15,477	24,029
Commercial real estate | Mortgages | Loans In Risk Categories
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	68,157	70,010
Installment and Other Consumer
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	22,497	23,028
Installment and Other Consumer | Watch
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	0	0
Installment and Other Consumer | Substandard
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	0	0
Installment and Other Consumer | Performing TDRs
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	15	17
Installment and Other Consumer | Non-accrual loans
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	125	43
Installment and Other Consumer | Loans In Risk Categories
Credit quality of the loan portfolio using internal rating system reflecting management's risk assessment
Financing receivable	$ 140	$ 60