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Allowance for Loan Losses - Loan loss by the primary segments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Loans:
Individually evaluated for impairment	$ 2,272		$ 855
Collectively evaluated for impairment	990,440		971,240
Total loans	992,712		972,095
Allowance for loan losses:
Specific reserve allocation	677		104
General reserve allocation	11,075		11,241
Total allowance for loan losses	11,752	$ 11,631	11,345	$ 9,699	$ 9,334	$ 9,279
Commercial loans secured by non-owner occupied real estate
Loans:
Total loans	428,274		400,751
Real estate-residential mortgage
Loans:
Total loans	268,595		249,989
Consumer.
Loans:
Total loans	16,391		16,363
Allocation for General Risk [Member]
Allowance for loan losses:
Specific reserve allocation	0		0
General reserve allocation	1,172		1,093
Total allowance for loan losses	1,172	1,161	1,093	961	925	924
Commercial
Loans:
Total loans	707,726		705,743
Commercial | Commercial.
Loans:
Individually evaluated for impairment	2,265		847
Collectively evaluated for impairment	277,187		304,145
Total loans	279,452		304,992
Allowance for loan losses:
Specific reserve allocation	670		96
General reserve allocation	2,864		3,376
Total allowance for loan losses	3,534	3,572	3,472	3,784	3,860	3,951
Commercial | Commercial loans secured by non-owner occupied real estate
Loans:
Individually evaluated for impairment	7		8
Collectively evaluated for impairment	428,267		400,743
Total loans	428,274		400,751
Allowance for loan losses:
Specific reserve allocation	7		8
General reserve allocation	5,528		5,365
Total allowance for loan losses	5,535	5,448	5,373	3,619	3,288	3,119
Consumer
Loans:
Total loans	284,986		266,352
Consumer | Real estate-residential mortgage
Loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	268,595		249,989
Total loans	268,595		249,989
Allowance for loan losses:
Specific reserve allocation	0		0
General reserve allocation	1,388		1,292
Total allowance for loan losses	1,388	1,329	1,292	1,216	1,141	1,159
Consumer | Consumer.
Loans:
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	16,391		16,363
Total loans	16,391		16,363
Allowance for loan losses:
Specific reserve allocation	0		0
General reserve allocation	123		115
Total allowance for loan losses	$ 123	$ 121	$ 115	$ 119	$ 120	$ 126

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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