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5) Value of Business Acquired and Goodwill: Net amortization charged to income (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Details              
Value of business acquired - net amortization charged to income $ 663,000 $ 713,000 $ 766,000 $ 854,000 $ 919,000 $ 981,541 $ 1,173,473