Loans, Primary Segments Portfolio and Accretable Yield for PCI Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	$ 1,737,953		$ 1,737,953		$ 1,441,533
Individually evaluated for impairment	12,194		12,194		15,533
Loans acquired with deteriorated credit quality	3,434		3,434		3,802
Collectively evaluated for impairment	1,722,325		1,722,325		1,422,198
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Allowance for loan losses	18,291		18,291		17,304
Individually evaluated for impairment	107	$ 269	107	$ 269	121
Allowance for loan losses related to loans acquired with deteriorated credit quality	0		0		0
Collectively evaluated for impairment	18,184	17,065	18,184	17,065	17,183
Loans and Leases Receivable, Net Amount [Abstract]
Net loans	1,719,662		1,719,662		1,424,229
Net loans, individually evaluated for impairment	12,087		12,087		15,412
Net loans, loans acquired with deteriorated credit quality	3,434		3,434		3,802
Net loans, collectively evaluated for impairment	1,704,141		1,704,141		1,405,015
Loans originated					24,300
Outstanding principal balances	0		0		6,800
Maximum amount of loan forgiven by guidance from SBA			150
Changes in the accretable yield for purchased credit-impaired loans [Roll Forward]
Balance at beginning of period	278	584	370	788	788
Acquisition of Midcoast	0	0	0	0
Reclassification of non-accretable discount	774	29	1,002	29
Accretion	(105)	(135)	(425)	(339)
Balance at end of period	947	478	947	478	370
Loans acquired with specific evidence of deterioration in credit quality [Abstract]
Outstanding balance	6,207		6,207		6,159
Carrying amount	3,434		$ 3,434		3,802
Minimum [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Number of days past for loan to be considered impaired, Minimum			90 days
First Mortgage [Member] | Minimum [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Period of mortgage on real estate			15 years
First Mortgage [Member] | Maximum [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Period of mortgage on real estate			30 years
Second Mortgage [Member] | Maximum [Member]
Loans and Leases Receivable, Net Amount [Abstract]
Period of mortgage on real estate			15 years
Real Estate Loans [Member] | Residential [Member]
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	203,673		$ 203,673		201,097
Individually evaluated for impairment	344		344		620
Loans acquired with deteriorated credit quality	9		9		14
Collectively evaluated for impairment	203,320		203,320		200,463
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Individually evaluated for impairment	6	16	6	16	12
Collectively evaluated for impairment	999	1,174	999	1,174	1,135
Real Estate Loans [Member] | Commercial [Member]
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	857,314		857,314		687,338
Individually evaluated for impairment	5,736		5,736		8,381
Loans acquired with deteriorated credit quality	1,902		1,902		2,145
Collectively evaluated for impairment	849,676		849,676		676,812
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Individually evaluated for impairment	60	97	60	97	61
Collectively evaluated for impairment	9,877	7,581	9,877	7,581	8,038
Real Estate Loans [Member] | Agricultural [Member]
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	317,761		317,761		312,011
Individually evaluated for impairment	5,174		5,174		5,355
Loans acquired with deteriorated credit quality	1,523		1,523		1,643
Collectively evaluated for impairment	311,064		311,064		305,013
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Individually evaluated for impairment	24	12	24	12	14
Collectively evaluated for impairment	4,514	4,734	4,514	4,734	4,715
Real Estate Loans [Member] | Construction [Member]
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	79,154		79,154		55,036
Individually evaluated for impairment	0		0		0
Loans acquired with deteriorated credit quality	0		0		0
Collectively evaluated for impairment	79,154		79,154		55,036
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	678	538	678	538	434
Consumer [Member]
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	124,375		124,375		25,858
Individually evaluated for impairment	4		4		0
Loans acquired with deteriorated credit quality	0		0		0
Collectively evaluated for impairment	124,371		124,371		25,858
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Individually evaluated for impairment	4	0	4	0	0
Collectively evaluated for impairment	228	318	228	318	262
Other Commercial Loans [Member]
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	66,241		66,241		74,585
Individually evaluated for impairment	135		135		186
Loans acquired with deteriorated credit quality	0		0		0
Collectively evaluated for impairment	66,106		66,106		74,399
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Individually evaluated for impairment	13	35	13	35	34
Collectively evaluated for impairment	380	1,096	380	1,096	989
Other Agricultural Loans [Member]
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	29,509		29,509		39,852
Individually evaluated for impairment	801		801		991
Loans acquired with deteriorated credit quality	0		0		0
Collectively evaluated for impairment	28,708		28,708		38,861
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Individually evaluated for impairment	0	109	0	109	0
Collectively evaluated for impairment	1,359	339	1,359	339	558
State and Political Subdivision Loans [Member]
Segments of loan portfolio and allowance for loan losses [Abstract]
Total financing receivables	59,926		59,926		45,756
Individually evaluated for impairment	0		0		0
Loans acquired with deteriorated credit quality	0		0		0
Collectively evaluated for impairment	59,926		59,926		45,756
Loans And Leases Receivable, Allowance For Loan Losses [Abstract]
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	325	$ 296	325	$ 296	$ 281
MidCoast Community Bancorp, Inc [Member]
Loans acquired with specific evidence of deterioration in credit quality [Abstract]
Carrying amount	$ 3,171		$ 3,171