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Loans Receivable and Allowance for Credit Losses (Loan Portfolio Summarized by the Past Due Status) (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans	$ 1,714,082,000	$ 1,603,877,000
Non-Accrual	7,720,000	7,622,000
Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	7,720,000	7,622,000
Total Past Due and Non-Accrual	10,962,000	19,193,000
Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	1,714,082,000	1,603,877,000
Financial Asset, Not Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	1,703,120,000	1,584,684,000
Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	2,311,000	11,223,000
Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	777,000	348,000
Financing Receivables, Greater than 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	154,000
Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	330,856,000	316,546,000
Non-Accrual	940,000	432,000
Residential Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	940,000	432,000
Total Past Due and Non-Accrual	1,278,000	1,322,000
Residential Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	330,856,000	316,546,000
Residential Real Estate Loans [Member] | Financial Asset, Not Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	329,578,000	315,224,000
Residential Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	70,000	877,000
Residential Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	268,000	13,000
Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	716,875,000	675,156,000
Non-Accrual	5,743,000	2,211,000
Commercial Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	5,743,000	2,211,000
Total Past Due and Non-Accrual	7,054,000	8,388,000
Commercial Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	716,875,000	675,156,000
Commercial Real Estate Loans [Member] | Financial Asset, Not Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	709,821,000	666,768,000
Commercial Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	1,182,000	6,177,000
Commercial Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	129,000
Agricultural Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	63,488,000	63,859,000
Agricultural Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-Accrual		127,000
Agricultural Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	63,488,000	63,859,000
Agricultural Real Estate Loans [Member] | Financial Asset, Not Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	63,488,000	63,732,000
Agricultural Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans		127,000
Construction Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	53,020,000	51,453,000
Construction Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-Accrual	11,000	18,000
Construction Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	53,020,000	51,453,000
Construction Real Estate Loans [Member] | Financial Asset, Not Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	53,009,000	51,435,000
Construction Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	11,000
Construction Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans		18,000
Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	211,991,000	200,576,000
Non-Accrual	127,000	4,264,000
Commercial Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	127,000	4,264,000
Total Past Due and Non-Accrual	471,000	7,588,000
Commercial Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	211,991,000	200,576,000
Commercial Loans [Member] | Financial Asset, Not Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	211,520,000	192,988,000
Commercial Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	194,000	3,170,000
Commercial Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	117,000	154,000
Commercial Loans [Member] | Financing Receivables, Greater than 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	33,000
Other Agricultural Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	30,077,000	31,966,000
Other Agricultural Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-Accrual	49,000	7,000
Other Agricultural Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	30,077,000	31,966,000
Other Agricultural Loans [Member] | Financial Asset, Not Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	30,028,000	31,959,000
Other Agricultural Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	49,000	7,000
Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	307,775,000	264,321,000
Non-Accrual	910,000	715,000
Consumer Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	910,000	715,000
Total Past Due and Non-Accrual	2,099,000	1,743,000
Consumer Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	307,775,000	264,321,000
Consumer Loans [Member] | Financial Asset, Not Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	305,676,000	262,578,000
Consumer Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	805,000	865,000
Consumer Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	263,000	$ 163,000
Consumer Loans [Member] | Financing Receivables, Greater than 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	$ 121,000

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