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Allowance for Loan Losses - Credit quality of the loan portfolio (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	$ 978,372,000	$ 985,054,000
90 Days Past Due and Still Accruing	0	0
Financial Asset, Not Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	973,040,000	977,589,000
Financial Asset, Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	5,332,000	7,465,000
30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	4,119,000	4,649,000
60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	166,000	1,687,000
90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	1,047,000	1,129,000
Commercial and Industrial
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	134,797,000	134,182,000
Paycheck Protection Program (PPP)
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	7,835,000	17,311,000
Commercial loans secured by owner occupied real estate
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	98,474,000	99,644,000
Commercial loans secured by Non-Owner Occupied real estate
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	430,105,000	430,825,000
REAL ESTATE - RESIDENTIAL MORTGAGE
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	292,530,000	287,996,000
CONSUMER
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	14,631,000	15,096,000
Commercial
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	671,211,000	681,962,000
Commercial | Commercial and Industrial
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	134,797,000	134,182,000
90 Days Past Due and Still Accruing	0	0
Commercial | Commercial and Industrial | Financial Asset, Not Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	133,171,000	133,918,000
Commercial | Commercial and Industrial | Financial Asset, Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	1,626,000	264,000
Commercial | Commercial and Industrial | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	1,626,000	14,000
Commercial | Commercial and Industrial | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	250,000
Commercial | Commercial and Industrial | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	0
Commercial | Paycheck Protection Program (PPP)
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	7,835,000	17,311,000
90 Days Past Due and Still Accruing	0	0
Commercial | Paycheck Protection Program (PPP) | Financial Asset, Not Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	7,835,000	17,311,000
Commercial | Paycheck Protection Program (PPP) | Financial Asset, Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	0
Commercial | Paycheck Protection Program (PPP) | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	0
Commercial | Paycheck Protection Program (PPP) | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	0
Commercial | Paycheck Protection Program (PPP) | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	0
Commercial | Commercial loans secured by owner occupied real estate
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	98,474,000	99,644,000
90 Days Past Due and Still Accruing	0	0
Commercial | Commercial loans secured by owner occupied real estate | Financial Asset, Not Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	98,158,000	99,454,000
Commercial | Commercial loans secured by owner occupied real estate | Financial Asset, Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	316,000	190,000
Commercial | Commercial loans secured by owner occupied real estate | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	316,000	0
Commercial | Commercial loans secured by owner occupied real estate | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	190,000
Commercial | Commercial loans secured by owner occupied real estate | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	0
Commercial | Commercial loans secured by Non-Owner Occupied real estate
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	430,105,000	430,825,000
90 Days Past Due and Still Accruing	0	0
Commercial | Commercial loans secured by Non-Owner Occupied real estate | Financial Asset, Not Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	430,030,000	428,790,000
Commercial | Commercial loans secured by Non-Owner Occupied real estate | Financial Asset, Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	75,000	2,035,000
Commercial | Commercial loans secured by Non-Owner Occupied real estate | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	2,035,000
Commercial | Commercial loans secured by Non-Owner Occupied real estate | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	75,000	0
Commercial | Commercial loans secured by Non-Owner Occupied real estate | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	0	0
Consumer.
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	307,161,000	303,092,000
Consumer. | REAL ESTATE - RESIDENTIAL MORTGAGE
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	292,530,000	287,996,000
90 Days Past Due and Still Accruing	0	0
Consumer. | REAL ESTATE - RESIDENTIAL MORTGAGE | Financial Asset, Not Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	289,518,000	283,178,000
Consumer. | REAL ESTATE - RESIDENTIAL MORTGAGE | Financial Asset, Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	3,012,000	4,818,000
Consumer. | REAL ESTATE - RESIDENTIAL MORTGAGE | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	1,913,000	2,449,000
Consumer. | REAL ESTATE - RESIDENTIAL MORTGAGE | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	82,000	1,240,000
Consumer. | REAL ESTATE - RESIDENTIAL MORTGAGE | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	1,017,000	1,129,000
Consumer. | CONSUMER
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	14,631,000	15,096,000
90 Days Past Due and Still Accruing	0	0
Consumer. | CONSUMER | Financial Asset, Not Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	14,328,000	14,938,000
Consumer. | CONSUMER | Financial Asset, Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	303,000	158,000
Consumer. | CONSUMER | 30-59 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	264,000	151,000
Consumer. | CONSUMER | 60-89 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	9,000	7,000
Consumer. | CONSUMER | 90 Days Past Due [Member]
Classes of the loan portfolio summarized by the aging categories of performing loans and nonaccrual loans
Total loans	$ 30,000	$ 0

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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