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Business Combination - Loans, Core Deposit Intangible and Deposits (Details) - USD ($)	Jan. 01, 2020	Dec. 31, 2020	Dec. 31, 2019
Business Combination
Outstanding principal balance		$ 101,803,000	$ 34,101,000
Loans, allowance for loan losses		39,156,000	32,873,000
PCI Loans
Business Combination
Outstanding principal balance		$ 12,760,000	$ 6,262,000
Peoples Bankshares, Incorporated (Peoples)
Business Combination
Outstanding principal balance	$ 131,920,000
Estimated fair value of loans acquired	124,195,000
Loans, allowance for loan losses	2,870,000
Information about PCI loans acquired
Contractual principal and interest due	20,310,000
Nonaccretable difference	(7,679,000)
Expected cash flows	12,631,000
Accretable yield	(3,372,000)
Purchase credit impaired loans - estimated fair value	9,259,000
Core deposit intangible asset	$ 1,711,000
Percentage of CDI to non-maturity deposits	1.80%
Premium of deposits	$ 557,000
Amortization period	2 years
Peoples Bankshares, Incorporated (Peoples) | Minimum
Information about PCI loans acquired
Maturity of deposits	3 months
Peoples Bankshares, Incorporated (Peoples) | Maximum
Information about PCI loans acquired
Maturity of deposits	5 years
Peoples Bankshares, Incorporated (Peoples) | PCI Loans
Business Combination
Outstanding principal balance	$ 4,280,000
Estimated fair value of loans acquired	$ 635,000

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Percentage of core deposit intangible assets to non-maturity deposits.

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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans

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The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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