3) Investments: Investments Classified by Contractual Maturity Date (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
AmortizedCost	$ 230,811,272	$ 184,979,644
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	243,807,562	191,850,749
Collateralized Mortgage Backed Securities
AmortizedCost	9,764,566	9,488,083
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	9,846,716	9,428,612
Redeemable Preferred Stock
AmortizedCost	623,635	623,635
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	677,038	$ 637,053
DueIn2017Member
AmortizedCost	1,205,533
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	1,208,929
DueIn2018Through2021Member
AmortizedCost	77,063,707
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	78,846,158
DueIn2022Through2026Member
AmortizedCost	54,265,268
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	56,731,089
DueAfter2026Member
AmortizedCost	87,888,563
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	$ 96,497,632