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Loans Receivable and Allowance for Credit Losses (Loan Portfolio Summarized by the Past Due Status) (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans	$ 1,603,877,000	$ 1,474,424,000
Non-Accrual	7,622,000
Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	7,622,000	1,113,000
Total Past Due and Non-Accrual	19,193,000	3,221,000
Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	1,603,877,000	6,290,000
Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	1,584,684,000	1,464,913,000
Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	11,223,000	1,646,000
Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	348,000	462,000
Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	316,546,000	298,813,000
Non-Accrual	432,000
Residential Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	432,000	486,000
Total Past Due and Non-Accrual	1,322,000	896,000
Residential Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	316,546,000	567,000
Residential Real Estate Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	315,224,000	297,350,000
Residential Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	877,000	187,000
Residential Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	13,000	223,000
Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	675,156,000	651,544,000
Non-Accrual	2,211,000
Commercial Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	2,211,000	402,000
Total Past Due and Non-Accrual	8,388,000	807,000
Commercial Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	675,156,000	2,049,000
Commercial Real Estate Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	666,768,000	648,688,000
Commercial Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	6,177,000	405,000
Agricultural Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	63,859,000	68,915,000
Agricultural Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-Accrual	127,000	130,000
Agricultural Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	63,859,000	2,034,000
Agricultural Real Estate Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	63,732,000	66,751,000
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	130,000
Construction Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	51,453,000	32,469,000
Construction Real Estate Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-Accrual	18,000
Construction Real Estate Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	51,453,000
Construction Real Estate Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	51,435,000	32,469,000
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	200,576,000	187,257,000
Non-Accrual	4,264,000
Commercial Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	4,264,000	61,000
Total Past Due and Non-Accrual	7,588,000	132,000
Commercial Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	200,576,000	1,640,000
Commercial Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	192,988,000	185,485,000
Commercial Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	3,170,000	71,000
Commercial Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	154,000
Other Agricultural Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	31,966,000	35,277,000
Other Agricultural Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Total Past Due and Non-Accrual	7,000
Other Agricultural Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	31,966,000
Other Agricultural Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	31,959,000	35,277,000
Other Agricultural Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	7,000
Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Loans	264,321,000	200,149,000
Non-Accrual	715,000
Consumer Loans [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Non-Accrual	715,000	164,000
Total Past Due and Non-Accrual	1,743,000	1,256,000
Consumer Loans [Member] | Purchased Credit-Impaired [Member]
Financing Receivable, Past Due [Line Items]
Loans	264,321,000
Consumer Loans [Member] | Financing Receivables, 1 to 30 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	262,578,000	198,893,000
Consumer Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	865,000	853,000
Consumer Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] | Company Originated [Member]
Financing Receivable, Past Due [Line Items]
Loans	$ 163,000	$ 239,000

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