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12) Mortgage Servicing Rights: Schedule of Mortgage Servicing Rights (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
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