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Allowance for Loan Losses - Credit Quality Indicators (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Allowance for loan losses
Loans, excluding consumer finance	$ 1,040,154,000	$ 802,192,000
Pass
Allowance for loan losses
Loans, excluding consumer finance	1,004,998,000	783,963,000
Special Mention
Allowance for loan losses
Loans, excluding consumer finance	20,526,000	15,383,000
Substandard
Allowance for loan losses
Loans, excluding consumer finance	11,628,000	962,000
Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	3,002,000	1,884,000
Doubtful
Allowance for loan losses
Loans, excluding consumer finance	0
Real estate - residential mortgage
Allowance for loan losses
Loans, excluding consumer finance	218,298,000	181,295,000
Real estate - residential mortgage | Pass
Allowance for loan losses
Loans, excluding consumer finance	215,712,000	177,049,000
Real estate - residential mortgage | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	1,715,000	1,839,000
Real estate - residential mortgage | Substandard
Allowance for loan losses
Loans, excluding consumer finance	595,000	881,000
Real estate - residential mortgage | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	276,000	1,526,000
Real estate - construction | Construction lending
Allowance for loan losses
Loans, excluding consumer finance	49,659,000	40,943,000
Real estate - construction | Construction lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	49,659,000	40,943,000
Real estate - construction | Consumer lot lending
Allowance for loan losses
Loans, excluding consumer finance	12,488,000	13,303,000
Real estate - construction | Consumer lot lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	12,488,000	13,303,000
Commercial, financial and agricultural | Commercial real estate lending
Allowance for loan losses
Loans, excluding consumer finance	441,903,000	326,554,000
Commercial, financial and agricultural | Commercial real estate lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	415,506,000	323,218,000
Commercial, financial and agricultural | Commercial real estate lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	15,507,000	3,266,000
Commercial, financial and agricultural | Commercial real estate lending | Substandard
Allowance for loan losses
Loans, excluding consumer finance	10,890,000	70,000
Commercial, financial and agricultural | Land acquisition and development lending
Allowance for loan losses
Loans, excluding consumer finance	37,724,000	42,891,000
Commercial, financial and agricultural | Land acquisition and development lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	37,724,000	33,870,000
Commercial, financial and agricultural | Land acquisition and development lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance		9,021,000
Commercial, financial and agricultural | Builder line lending
Allowance for loan losses
Loans, excluding consumer finance	18,194,000	26,373,000
Commercial, financial and agricultural | Builder line lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	18,194,000	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	202,394,000	104,994,000
Commercial, financial and agricultural | Commercial business lending | Pass
Allowance for loan losses
Loans, excluding consumer finance	196,743,000	104,291,000
Commercial, financial and agricultural | Commercial business lending | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	3,124,000	692,000
Commercial, financial and agricultural | Commercial business lending | Substandard
Allowance for loan losses
Loans, excluding consumer finance	99,000
Commercial, financial and agricultural | Commercial business lending | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	2,428,000	11,000
Equity lines
Allowance for loan losses
Loans, excluding consumer finance	48,466,000	52,083,000
Equity lines | Pass
Allowance for loan losses
Loans, excluding consumer finance	48,140,000	51,662,000
Equity lines | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	132,000	181,000
Equity lines | Substandard
Allowance for loan losses
Loans, excluding consumer finance	3,000	11,000
Equity lines | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	191,000	229,000
Consumer
Allowance for loan losses
Loans, excluding consumer finance	11,028,000	13,756,000
Consumer | Pass
Allowance for loan losses
Loans, excluding consumer finance	10,832,000	13,632,000
Consumer | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	48,000	6,000
Consumer | Substandard
Allowance for loan losses
Loans, excluding consumer finance	41,000
Consumer | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	107,000	$ 118,000
Peoples Bankshares, Incorporated (Peoples) | Pass
Allowance for loan losses
Loans, excluding consumer finance	53,010,000.00
Peoples Bankshares, Incorporated (Peoples) | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	695,000
Peoples Bankshares, Incorporated (Peoples) | Substandard
Allowance for loan losses
Loans, excluding consumer finance	$ 2,980,000

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