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Employee Benefits (Details - Asset allocation) | Dec. 31, 2023 | Dec. 31, 2022
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Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Weighted Average Asset Allocation at Year-End | 100.00% | 100.00%
Equity Securities [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Weighted Average Asset Allocation at Year-End | 87.00% | 87.00%
Debt Securities [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Weighted Average Asset Allocation at Year-End | 13.00% | 13.00%
Cash and Cash Equivalents [Member] |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] |  |
Weighted Average Asset Allocation at Year-End | 0.00% | 0.00%

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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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