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3) Investments: Investments Classified by Contractual Maturity Date (Details) - USD ($) | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
AmortizedCost | $ 193,208,660 | $ 184,979,644
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date. | 205,044,443 | 191,850,749
Collateralized Mortgage Backed Securities |  |
AmortizedCost | 10,612,465 | 9,488,083
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date. | 10,691,387 | 9,428,612
Redeemable Preferred Stock |  |
AmortizedCost | 623,635 | 623,635
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date. | 663,473 | $ 637,053
DueIn2017Member |  |
AmortizedCost | 2,711,324 |
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date. | 2,725,318 |
DueIn2018Through2021Member |  |
AmortizedCost | 50,865,992 |
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date. | 52,437,835 |
DueIn2022Through2026Member |  |
AmortizedCost | 43,504,148 |
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date. | 45,811,635 |
DueAfter2026Member |  |
AmortizedCost | 84,891,096 |
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date. | $ 92,714,795 |

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