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2) Investments: Mortgage Loans - Additional (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Allowance for losses on mortgage loans held for investment $ 1,768,796 $ 1,748,783
Minimum    
Mortgage Loan, Interest Rate 2.00%  
Maximum    
Mortgage Loan, Interest Rate 10.50%