Loans Receivable and Allowance for Loan Losses (Loan Portfolio Summarized by the Past Due Status) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Total Loans	$ 1,356,040	$ 1,412,289
Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	643	3,391
Total Past Due and Non-Accrual	1,208	5,434
Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	8,304	9,281
Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	1,346,528	1,397,574
Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	431	1,656
Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due and still accruing	134	387
Financing Receivables, Greater than 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due and still accruing	91
Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	273,040	263,127
Residential Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	469	571
Total Past Due and Non-Accrual	634	1,130
Residential Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	784	591
Residential Real Estate Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	271,622	261,406
Residential Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	155	355
Residential Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due and still accruing	10	204
Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	628,724	579,104
Commercial Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	103	1,674
Total Past Due and Non-Accrual	103	1,733
Commercial Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	3,285	3,995
Commercial Real Estate Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	625,336	573,376
Commercial Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due		59
Agricultural Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	61,925	66,334
Agricultural Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual		676
Total Past Due and Non-Accrual	25	676
Agricultural Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	1,918	2,043
Agricultural Real Estate Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	59,982	63,615
Agricultural Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	25
Construction Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	21,990	21,005
Construction Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Total Loans		194
Construction Real Estate Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	21,990	20,811
Commercial [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	186,031	283,741
Commercial [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	16	22
Total Past Due and Non-Accrual	32	1,121
Commercial [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	198	246
Commercial [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	185,801	282,374
Commercial [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	3	1,009
Commercial [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due and still accruing	13	90
Commercial [Member] | Financing Receivables, Greater than 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due and still accruing	91
Other Agricultural Loans [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	37,930	40,929
Other Agricultural Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual		263
Total Past Due and Non-Accrual		263
Other Agricultural Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	2,119	2,212
Other Agricultural Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	35,811	38,454
Consumer Loans To Individuals [Member]
Financing Receivable, Past Due [Line Items]
Total Loans	146,400	158,049
Consumer Loans To Individuals [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	55	185
Total Past Due and Non-Accrual	414	511
Consumer Loans To Individuals [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	145,986	157,538
Consumer Loans To Individuals [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due	248	233
Consumer Loans To Individuals [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Past Due and still accruing	$ 111	$ 93