Loans, Past Due (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Recorded investment of past due [Abstract]
Total past due	$ 1,723,475	$ 1,724,999
Current	1,717,090	1,714,673
PCI		3,306
Total financing receivables	1,723,475	1,724,999
90 days or greater past due and accruing	48	7
Financing receivables on nonaccrual status [Abstract]
Current and non-accrual	5,402	3,370
PCI Loans considered non accrual		0
Nonaccrual With a related allowance	2,972	6,938
Nonaccrual Without a related allowance	7,432
90 days or greater past due and accruing	48	7
Total loans receivables	10,404	6,938	$ 10,404
Total non-performing loans	10,452	6,945
Financing receivables on accrual status [Abstract]
Current and still accruing	1,711,688	1,711,303
PCI Loans still accruing		3,306
Total financing receivables and still accruing	$ 1,713,071	1,718,061
Minimum [Member]
Financing receivables on nonaccrual status [Abstract]
Period of past due after which loans considered as non accrual	90 days
Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	$ 6,385	7,020
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	5,002	3,568
Financing receivables on accrual status [Abstract]
Total past due and still accruing	1,383	3,452
30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,201	3,276
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	0	46
Financing receivables on accrual status [Abstract]
Total past due and still accruing	1,201	3,230
60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	214	291
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	80	76
Financing receivables on accrual status [Abstract]
Total past due and still accruing	134	215
90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	4,970	3,453
Financing receivables on nonaccrual status [Abstract]
Total past due and non-accrual	4,922	3,446
Financing receivables on accrual status [Abstract]
Total past due and still accruing	48	7
Home Equity [Member]
Recorded investment of past due [Abstract]
Total past due	46,390
Commercial [Member]
Recorded investment of past due [Abstract]
Total past due	878,972
Construction [Member]
Recorded investment of past due [Abstract]
Total past due	75,745
Real Estate Loans [Member] | Mortgages [Member]
Recorded investment of past due [Abstract]
Current	165,679	161,843
PCI		9
Total financing receivables	166,403	162,569
90 days or greater past due and accruing	7	0
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	37	562
Nonaccrual Without a related allowance	448
90 days or greater past due and accruing	7	0
Total loans receivables		562	448
Total non-performing loans	492	562
Real Estate Loans [Member] | Mortgages [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	724	717
Real Estate Loans [Member] | Mortgages [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	398	356
Real Estate Loans [Member] | Mortgages [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	74	132
Real Estate Loans [Member] | Mortgages [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	252	229
Real Estate Loans [Member] | Home Equity [Member]
Recorded investment of past due [Abstract]
Current	46,307	47,558
PCI		0
Total financing receivables	46,390	47,644
90 days or greater past due and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	0	29
Nonaccrual Without a related allowance	29
90 days or greater past due and accruing	0	0
Total loans receivables		29	66
Total non-performing loans	29	29
Real Estate Loans [Member] | Home Equity [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	83	86
Real Estate Loans [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	50	48
Real Estate Loans [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	4	9
Real Estate Loans [Member] | Home Equity [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	29	29
Real Estate Loans [Member] | Commercial [Member]
Recorded investment of past due [Abstract]
Total past due	878,972	876,569
Current	877,043	871,745
PCI		1,856
Total financing receivables	878,972	876,569
90 days or greater past due and accruing	6	0
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	356	2,778
Nonaccrual Without a related allowance	2,067
90 days or greater past due and accruing	6	0
Total loans receivables		2,778	2,423
Total non-performing loans	2,429	2,778
Real Estate Loans [Member] | Commercial [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,929	2,968
Real Estate Loans [Member] | Commercial [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	198	1,065
Real Estate Loans [Member] | Commercial [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	130	115
Real Estate Loans [Member] | Commercial [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	1,601	1,788
Real Estate Loans [Member] | Agricultural [Member]
Recorded investment of past due [Abstract]
Total past due	312,793	313,614
Current	311,355	310,805
PCI		1,441
Total financing receivables	312,793	313,614
90 days or greater past due and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	188	3,222
Nonaccrual Without a related allowance	2,881
90 days or greater past due and accruing	0	0
Total loans receivables		3,222	3,069
Total non-performing loans	3,069	3,222
Real Estate Loans [Member] | Agricultural [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,438	1,368
Real Estate Loans [Member] | Agricultural [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	59	0
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	1,379	1,368
Real Estate Loans [Member] | Construction [Member]
Recorded investment of past due [Abstract]
Total past due	75,745	80,691
Current	75,745	80,691
PCI		0
Total financing receivables	75,745	80,691
90 days or greater past due and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	2,357	0
Nonaccrual Without a related allowance	0
90 days or greater past due and accruing	0	0
Total loans receivables		0	2,357
Total non-performing loans	2,357	0
Real Estate Loans [Member] | Construction [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	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	87,101	86,650
Current	86,977	86,496
PCI		0
Total financing receivables	87,101	86,650
90 days or greater past due and accruing	0	7
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	0	0
Nonaccrual Without a related allowance	0
90 days or greater past due and accruing	0	7
Total loans receivables		0	0
Total non-performing loans	0	7
Consumer [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	124	154
Consumer [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	124	147
Consumer [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	0	0
Consumer [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	0	7
Other Commercial Loans [Member]
Recorded investment of past due [Abstract]
Total past due	64,133	63,222
Current	62,353	61,495
PCI		0
Total financing receivables	64,133	63,222
90 days or greater past due and accruing	35	0
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	34	62
Nonaccrual Without a related allowance	1,674
90 days or greater past due and accruing	35	0
Total loans receivables		62	1,708
Total non-performing loans	1,743	62
Other Commercial Loans [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	1,780	1,727
Other Commercial Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	65	1,660
Other Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	6	35
Other Commercial Loans [Member] | 90 Days Or Greater [Member]
Recorded investment of past due [Abstract]
Total past due	1,709	32
Other Commercial Loans [Member] | Construction [Member]
Recorded investment of past due [Abstract]
Total past due	64,133
Other Agricultural Loans [Member]
Recorded investment of past due [Abstract]
Total past due	32,052	34,832
Current	31,745	34,832
PCI		0
Total financing receivables	32,052	34,832
90 days or greater past due and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	0	285
Nonaccrual Without a related allowance	333
90 days or greater past due and accruing	0	0
Total loans receivables		285	333
Total non-performing loans	333	285
Other Agricultural Loans [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	307	0
Other Agricultural Loans [Member] | 30 to 59 Days Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	307	0
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	59,886	59,208
Current	59,886	59,208
PCI		0
Total financing receivables	59,886	59,208
90 days or greater past due and accruing	0	0
Financing receivables on nonaccrual status [Abstract]
Nonaccrual With a related allowance	0	0
Nonaccrual Without a related allowance	0
90 days or greater past due and accruing	0	0
Total loans receivables		0	$ 0
Total non-performing loans	0	0
State and Political Subdivision Loans [Member] | Total Past Due [Member]
Recorded investment of past due [Abstract]
Total past due	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