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5) Value of Business Acquired, Intangible Assets and Goodwill: Net amortization charged to income (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |  |  |  |  |  |  |
Value of business acquired - net amortization charged to income | $ 707,000 | $ 784,000 | $ 854,000 | $ 918,000 | $ 1,019,000 | $ 921,398 | $ 851,374
Weighted average amortization period |  |  |  |  |  | 6 years 1 month 2 days |

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- Definition Represents the monetary amount of Value of business acquired - net amortization charged to income, during the indicated time period. + References No definition available. + Details
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- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959 + Details
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- References No definition available. + Details
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