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12) Mortgage Servicing Rights: Schedule of Mortgage Servicing Rights (Details) - USD ($) | Mar. 31, 2021 | Dec. 31, 2020
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Text Block [Abstract] |  |  |
Balance before valuation allowance at beginning of year |  | $ 35,210,516 | $ 17,155,529
MSRs proceeds from loan sales |  | 11,008,149 | 29,896,465
Amortization | [1] | (3,439,304) | (11,841,478)
Application of valuation allowance to write down MSRs with other than temporary impairment |  | 0 | 0
Balance before valuation allowance at year end |  | 42,779,361 | 35,210,516
Mortgage servicing rights, net |  | 42,779,361 | 35,210,516
Estimated fair value of MSRs at end of period |  | $ 55,087,150 | $ 38,702,358
[1] | Included in other expenses on the condensed consolidated statements of earnings

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- Definition Represents the monetary amount of Application of valuation allowance to write down MSRs with other than temporary impairment, as of the indicated date. + References No definition available. + Details
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- Definition Represents the monetary amount of MSRs proceeds from loan sales, as of the indicated date. + References No definition available. + Details
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