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12) Mortgage Servicing Rights: Schedule of Mortgage Servicing Rights (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Text Block [Abstract]    
Balance before valuation allowance at beginning of year $ 17,155,529 $ 20,016,822
MSRs proceeds from loan sales 19,400,262 4,194,502
Amortization (8,168,315) (7,055,795)
Application of valuation allowance to write down MSRs with other than temporary impairment 0 0
Balance before valuation allowance at year end 28,387,476 17,155,529
Mortgage servicing rights, net 28,387,476 17,155,529
Estimated fair value of MSRs at end of period $ 30,288,406 $ 22,784,571