Loans, Past Due (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Recorded investment of past due [Abstract]
Total past due	$ 6,458	$ 4,637
Current	1,468,510	1,433,094
PCI	3,727	3,802
Total financing receivables	1,478,695	1,441,533
90 Days or greater and accruing	12	46
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	4,349	3,624
Current and non-accrual	3,461	3,992
PCI Loans considered non accrual	0	0
Financing receivable nonaccrual status	7,810	7,616
Financing receivables on accrual status [Abstract]
Total past due and still accruing	2,109	1,013
Current and still accruing	1,465,049	1,429,102
PCI Loans still accruing	3,727	3,802
Total financing receivables and still accruing	$ 1,470,885	1,433,917
Minimum [Member]
Financing receivables on nonaccrual status [Abstract]
Period of past due after which loans considered as non accrual	90 days
30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	$ 1,681	671
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	272	0
Financing receivables on accrual status [Abstract]
Total past due and still accruing	1,409	671
60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,145	296
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	457	0
Financing receivables on accrual status [Abstract]
Total past due and still accruing	688	296
90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	3,632	3,670
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	3,620	3,624
Financing receivables on accrual status [Abstract]
Total past due and still accruing	12	46
Real Estate Loans [Member] | Mortgages [Member]
Recorded investment of past due [Abstract]
Total past due	860	599
Current	151,778	150,329
PCI	12	14
Total financing receivables	152,650	150,942
90 Days or greater and accruing	12	13
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	443	595
Real Estate Loans [Member] | Mortgages [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	567	220
Real Estate Loans [Member] | Mortgages [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	86	170
Real Estate Loans [Member] | Mortgages [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	207	209
Real Estate Loans [Member] | Home Equity [Member]
Recorded investment of past due [Abstract]
Total past due	84	136
Current	48,833	50,019
PCI	0	0
Total financing receivables	48,917	50,155
90 Days or greater and accruing	0	33
Real Estate Loans [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	60	103
Real Estate Loans [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	24	0
Real Estate Loans [Member] | Home Equity [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	0	33
Real Estate Loans [Member] | Commercial [Member]
Recorded investment of past due [Abstract]
Total past due	2,756	2,211
Current	720,011	682,982
PCI	2,109	2,145
Total financing receivables	724,876	687,338
90 Days or greater and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	2,984	2,945
Real Estate Loans [Member] | Commercial [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	97	127
Real Estate Loans [Member] | Commercial [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	719	115
Real Estate Loans [Member] | Commercial [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	1,940	1,969
Real Estate Loans [Member] | Agricultural [Member]
Recorded investment of past due [Abstract]
Total past due	2,039	1,398
Current	301,872	308,970
PCI	1,606	1,643
Total financing receivables	305,517	312,011
90 Days or greater and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	3,083	3,133
Real Estate Loans [Member] | Agricultural [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	671	31
Real Estate Loans [Member] | Agricultural [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Real Estate Loans [Member] | Agricultural [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	1,368	1,367
Real Estate Loans [Member] | Construction [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Current	66,738	55,036
PCI	0	0
Total financing receivables	66,738	55,036
90 Days or greater and accruing	0	0
Real Estate Loans [Member] | Construction [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Real Estate Loans [Member] | Construction [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Real Estate Loans [Member] | Construction [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Consumer [Member]
Recorded investment of past due [Abstract]
Total past due	189	164
Current	21,271	25,694
PCI	0	0
Total financing receivables	21,460	25,858
90 Days or greater and accruing	0	0
Consumer [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	186	163
Consumer [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	3	1
Consumer [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Other Commercial Loans [Member]
Recorded investment of past due [Abstract]
Total past due	530	119
Current	68,521	74,466
PCI	0	0
Total financing receivables	69,051	74,585
90 Days or greater and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	567	140
Other Commercial Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	100	17
Other Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	313	10
Other Commercial Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	117	92
Other Agricultural Loans [Member]
Recorded investment of past due [Abstract]
Total past due	0	10
Current	39,904	39,842
PCI	0	0
Total financing receivables	39,904	39,852
90 Days or greater and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	733	803
Other Agricultural Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	10
Other Agricultural Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Other Agricultural Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Current	49,582	45,756
PCI	0	0
Total financing receivables	49,582	45,756
90 Days or greater and accruing	0	0
State and Political Subdivision Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
State and Political Subdivision Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	$ 0	$ 0