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Loans Receivable and Allowance for Credit Losses (Loan Portfolio Summarized by the Past Due Status) (Details) - USD ($) | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Loans | $ 1,641,531,000 | $ 1,603,877,000
Non-Accrual | 7,641,000 | 7,622,000
Company Originated [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Non-Accrual | 7,641,000 | 7,622,000
Total Past Due and Non-Accrual | 10,688,000 | 19,193,000
Purchased Credit-Impaired [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,641,531,000 | 1,603,877,000
Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,630,843,000 | 1,584,684,000
Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 2,739,000 | 11,223,000
Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 308,000 | 348,000
Residential Real Estate Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 317,507,000 | 316,546,000
Non-Accrual | 953,000 | 432,000
Residential Real Estate Loans [Member] | Company Originated [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Non-Accrual | 953,000 | 432,000
Total Past Due and Non-Accrual | 2,152,000 | 1,322,000
Residential Real Estate Loans [Member] | Purchased Credit-Impaired [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 317,507,000 | 316,546,000
Residential Real Estate Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 315,355,000 | 315,224,000
Residential Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 1,150,000 | 877,000
Residential Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 49,000 | 13,000
Commercial Real Estate Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 685,212,000 | 675,156,000
Non-Accrual | 5,780,000 | 2,211,000
Commercial Real Estate Loans [Member] | Company Originated [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Non-Accrual | 5,780,000 | 2,211,000
Total Past Due and Non-Accrual | 6,498,000 | 8,388,000
Commercial Real Estate Loans [Member] | Purchased Credit-Impaired [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 685,212,000 | 675,156,000
Commercial Real Estate Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 678,714,000 | 666,768,000
Commercial Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 718,000 | 6,177,000
Agricultural Real Estate Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 60,963,000 | 63,859,000
Agricultural Real Estate Loans [Member] | Company Originated [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Non-Accrual | 19,000 | 127,000
Agricultural Real Estate Loans [Member] | Purchased Credit-Impaired [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 60,963,000 | 63,859,000
Agricultural Real Estate Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 60,944,000 | 63,732,000
Agricultural Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 19,000 | 127,000
Construction Real Estate Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 48,030,000 | 51,453,000
Construction Real Estate Loans [Member] | Company Originated [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due and Non-Accrual | 39,000 | 18,000
Construction Real Estate Loans [Member] | Purchased Credit-Impaired [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 48,030,000 | 51,453,000
Construction Real Estate Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 47,991,000 | 51,435,000
Construction Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 39,000 | 18,000
Commercial Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 208,658,000 | 200,576,000
Non-Accrual | 108,000 | 4,264,000
Commercial Loans [Member] | Company Originated [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Non-Accrual | 108,000 | 4,264,000
Total Past Due and Non-Accrual | 378,000 | 7,588,000
Commercial Loans [Member] | Purchased Credit-Impaired [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 208,658,000 | 200,576,000
Commercial Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 208,280,000 | 192,988,000
Commercial Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 236,000 | 3,170,000
Commercial Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 34,000 | 154,000
Other Agricultural Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 31,281,000 | 31,966,000
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 | 31,281,000 | 31,966,000
Other Agricultural Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 31,281,000 | 31,959,000
Other Agricultural Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans |  | 7,000
Consumer Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 289,880,000 | 264,321,000
Non-Accrual | 800,000 | 715,000
Consumer Loans [Member] | Company Originated [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Non-Accrual | 800,000 | 715,000
Total Past Due and Non-Accrual | 1,602,000 | 1,743,000
Consumer Loans [Member] | Purchased Credit-Impaired [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 289,880,000 | 264,321,000
Consumer Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 288,278,000 | 262,578,000
Consumer Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | 616,000 | 865,000
Consumer Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Loans | $ 186,000 | $ 163,000

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