Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Allowance for loan losses
Loans, excluding consumer finance	$ 1,028,341,000	$ 802,192,000
Pass
Allowance for loan losses
Loans, excluding consumer finance	983,838,000	783,963,000
Special Mention
Allowance for loan losses
Loans, excluding consumer finance	39,434,000	15,383,000
Substandard
Allowance for loan losses
Loans, excluding consumer finance	3,303,000	962,000
Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	1,766,000	1,884,000
Real estate - residential mortgage
Allowance for loan losses
Loans, excluding consumer finance	205,011,000	181,295,000
Real estate - residential mortgage | Pass
Allowance for loan losses
Loans, excluding consumer finance	201,678,000	177,049,000
Real estate - residential mortgage | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	1,511,000	1,839,000
Real estate - residential mortgage | Substandard
Allowance for loan losses
Loans, excluding consumer finance	842,000	881,000
Real estate - residential mortgage | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	980,000	1,526,000
Real estate - construction | Construction lending
Allowance for loan losses
Loans, excluding consumer finance	56,382,000	40,943,000
Real estate - construction | Construction lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	56,382,000	40,943,000
Real estate - construction | Consumer lot lending
Allowance for loan losses
Loans, excluding consumer finance	15,712,000	13,303,000
Real estate - construction | Consumer lot lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	15,712,000	13,303,000
Commercial, financial and agricultural | Commercial real estate lending
Allowance for loan losses
Loans, excluding consumer finance	421,683,000	326,554,000
Commercial, financial and agricultural | Commercial real estate lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	393,105,000	323,218,000
Commercial, financial and agricultural | Commercial real estate lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	26,125,000	3,266,000
Commercial, financial and agricultural | Commercial real estate lending | Substandard
Allowance for loan losses
Loans, excluding consumer finance	2,453,000	70,000
Commercial, financial and agricultural | Land acquisition and development lending
Allowance for loan losses
Loans, excluding consumer finance	38,121,000	42,891,000
Commercial, financial and agricultural | Land acquisition and development lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	30,575,000	33,870,000
Commercial, financial and agricultural | Land acquisition and development lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	7,546,000	9,021,000
Commercial, financial and agricultural | Builder line lending
Allowance for loan losses
Loans, excluding consumer finance	22,172,000	26,373,000
Commercial, financial and agricultural | Builder line lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	22,172,000	25,995,000
Commercial, financial and agricultural | Builder line lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance		378,000
Commercial, financial and agricultural | Commercial business lending
Allowance for loan losses
Loans, excluding consumer finance	200,841,000	104,994,000
Commercial, financial and agricultural | Commercial business lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	196,755,000	104,291,000
Commercial, financial and agricultural | Commercial business lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	4,086,000	692,000
Commercial, financial and agricultural | Commercial business lending | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance		11,000
Equity lines
Allowance for loan losses
Loans, excluding consumer finance	52,697,000	52,083,000
Equity lines | Pass
Allowance for loan losses
Loans, excluding consumer finance	52,340,000	51,662,000
Equity lines | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	105,000	181,000
Equity lines | Substandard
Allowance for loan losses
Loans, excluding consumer finance	8,000	11,000
Equity lines | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	244,000	229,000
Consumer
Allowance for loan losses
Loans, excluding consumer finance	15,722,000	13,756,000
Consumer | Pass
Allowance for loan losses
Loans, excluding consumer finance	15,119,000	13,632,000
Consumer | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	61,000	6,000
Consumer | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	542,000	$ 118,000
Peoples Bankshares, Incorporated (Peoples) | Pass
Allowance for loan losses
Loans, excluding consumer finance	93,840,000
Peoples Bankshares, Incorporated (Peoples) | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	1,770,000
Peoples Bankshares, Incorporated (Peoples) | Substandard
Allowance for loan losses
Loans, excluding consumer finance	2,910,000
Peoples Bankshares, Incorporated (Peoples) | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	$ 427,000