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Loans Receivable and Allowance for Credit Losses (Summary of Recorded investment in Loan Classes Based on Payment Activity) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 1,621,680,000 | $ 1,603,877,000
Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 | 33,875,000 | 178,300,000
2023 | 175,234,000 | 153,827,000
2022 | 145,134,000 | 89,184,000
2021 | 79,517,000 | 51,330,000
2020 | 47,133,000 | 28,551,000
Prior | 118,982,000 | 98,851,000
Revolving Loans Amortized Cost Basis | 32,296,000 | 32,277,000
Total | 632,171,000 | 632,320,000
Performing [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 | 33,875,000 | 178,189,000
2023 | 175,105,000 | 153,423,000
2022 | 144,734,000 | 89,066,000
2021 | 79,363,000 | 51,299,000
2020 | 47,112,000 | 28,452,000
Prior | 118,466,000 | 98,517,000
Revolving Loans Amortized Cost Basis | 32,277,000 | 32,227,000
Total | 630,932,000 | 631,173,000
Nonperforming [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 |  | 111,000
2023 | 129,000 | 404,000
2022 | 400,000 | 118,000
2021 | 154,000 | 31,000
2020 | 21,000 | 99,000
Prior | 516,000 | 334,000
Revolving Loans Amortized Cost Basis | 19,000 | 50,000
Total | 1,239,000 | 1,147,000
Residential Real Estate Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 313,531,000 | 316,546,000
Residential Real Estate Loans [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 | 1,177,000 | 27,446,000
2023 | 28,172,000 | 62,178,000
2022 | 62,759,000 | 57,691,000
2021 | 56,633,000 | 35,357,000
2020 | 34,427,000 | 16,464,000
Prior | 101,272,000 | 88,275,000
Revolving Loans Amortized Cost Basis | 29,091,000 | 29,135,000
Total | 313,531,000 | 316,546,000
Current period gross charge-offs, Prior |  | 34,000
Current period gross charge-offs, Total |  | 34,000
Residential Real Estate Loans [Member] | Performing [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 | 1,177,000 | 27,446,000
2023 | 28,172,000 | 62,178,000
2022 | 62,759,000 | 57,691,000
2021 | 56,633,000 | 35,357,000
2020 | 34,427,000 | 16,406,000
Prior | 100,804,000 | 87,951,000
Revolving Loans Amortized Cost Basis | 29,072,000 | 29,085,000
Total | 313,044,000 | 316,114,000
Residential Real Estate Loans [Member] | Nonperforming [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2020 |  | 58,000
Prior | 468,000 | 324,000
Revolving Loans Amortized Cost Basis | 19,000 | 50,000
Total | 487,000 | 432,000
Construction Real Estate Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 47,409,000 | 51,453,000
Construction Real Estate Loans [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 | 4,881,000 | 23,500,000
2023 | 27,558,000 | 14,906,000
2022 | 11,894,000 | 6,791,000
2021 | 474,000 | 1,599,000
2020 |  | 1,829,000
Prior | 292,000 | 624,000
Revolving Loans Amortized Cost Basis | 2,310,000 | 2,204,000
Total | 47,409,000 | 51,453,000
Construction Real Estate Loans [Member] | Performing [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 | 4,881,000 | 23,500,000
2023 | 27,558,000 | 14,906,000
2022 | 11,894,000 | 6,791,000
2021 | 474,000 | 1,599,000
2020 |  | 1,829,000
Prior | 292,000 | 624,000
Revolving Loans Amortized Cost Basis | 2,310,000 | 2,204,000
Total | 47,409,000 | 51,453,000
Consumer Loans [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 271,231,000 | 264,321,000
Consumer Loans [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 | 27,817,000 | 127,354,000
2023 | 119,504,000 | 76,743,000
2022 | 70,481,000 | 24,702,000
2021 | 22,410,000 | 14,374,000
2020 | 12,706,000 | 10,258,000
Prior | 17,418,000 | 9,952,000
Revolving Loans Amortized Cost Basis | 895,000 | 938,000
Total | 271,231,000 | 264,321,000
Current period gross charge-offs, 2024 |  | 45,000
Current period gross charge-offs, 2023 | 67,000 | 710,000
Current period gross charge-offs, 2022 | 277,000 | 200,000
Current period gross charge-offs, 2021 | 72,000 | 35,000
Current period gross charge-offs, 2020 | 23,000 | 45,000
Current period gross charge-offs, Prior |  | 28,000
Current period gross charge-offs, Revolving loans amortized cost basis |  | 4,000
Current period gross charge-offs, Total | 439,000 | 1,067,000
Consumer Loans [Member] | Performing [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 | 27,817,000 | 127,243,000
2023 | 119,375,000 | 76,339,000
2022 | 70,081,000 | 24,584,000
2021 | 22,256,000 | 14,343,000
2020 | 12,685,000 | 10,217,000
Prior | 17,370,000 | 9,942,000
Revolving Loans Amortized Cost Basis | 895,000 | 938,000
Total | 270,479,000 | 263,606,000
Consumer Loans [Member] | Nonperforming [Member] | Based on Payment Activity [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
2024 |  | 111,000
2023 | 129,000 | 404,000
2022 | 400,000 | 118,000
2021 | 154,000 | 31,000
2020 | 21,000 | 41,000
Prior | 48,000 | 10,000
Total | $ 752,000 | $ 715,000

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