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Loans Receivable and Allowance for Loan Losses (Loan Portfolio Summarized by the Past Due Status) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Financing Receivable, Past Due [Line Items]
Loans	$ 1,611,278	$ 1,474,424
Non-Accrual	10,536	1,113	$ 10,536
Total Past Due and Non-Accrual	13,618	3,221
Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans		6,290
Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	1,597,660	1,464,913
Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	2,908	1,646
Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	174	462
Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	316,139	298,813
Non-Accrual	575	486	575
Total Past Due and Non-Accrual	1,551	896
Residential Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans		567
Residential Real Estate Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	314,588	297,350
Residential Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	957	187
Residential Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	19	223
Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	688,485	651,544
Non-Accrual	2,222	402	2,222
Total Past Due and Non-Accrual	3,192	807
Commercial Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans		2,049
Commercial Real Estate Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	685,293	648,688
Commercial Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	970	405
Agricultural Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	66,767	68,915
Total Past Due and Non-Accrual		130
Agricultural Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans		2,034
Agricultural Real Estate Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	66,767	66,751
Agricultural Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans		130
Construction Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	41,305	32,469
Total Past Due and Non-Accrual	20
Construction Real Estate Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	41,285	32,469
Construction Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	20
Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	205,014	187,257
Non-Accrual	7,071	61	7,071
Total Past Due and Non-Accrual	7,516	132
Commercial Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans		1,640
Commercial Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	197,498	185,485
Commercial Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	445	71
Other Agricultural Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	32,740	35,277
Other Agricultural Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	32,740	35,277
Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	260,828	200,149
Non-Accrual	668	164	$ 668
Total Past Due and Non-Accrual	1,339	1,256
Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	259,489	198,893
Consumer Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	516	853
Consumer Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Loans	$ 155	$ 239

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