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3) Investments: Schedule of Unrealized Loss on Investments (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Held-to-maturity Securities, Unrecognized Holding Loss | $ 2,660,816 | $ 1,820,262
Held-to-maturity Securities, Fair Value | 105,005,042 | 83,639,680
Fair Value |  | 2,176,931
USTreasurySecurities1Member |  |
Held-to-maturity Securities, Fair Value | 52,080,292 | 52,250,079
US States and Political Subdivisions Debt Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 145,551 | 71,013
Held-to-maturity Securities, Fair Value | 4,109,339 | 2,439,903
Corporate Debt Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 1,305,125 | 1,007,504
Held-to-maturity Securities, Fair Value | 45,043,139 | 24,745,123
Collateralized Mortgage Backed Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 249,019 | 162,131
Held-to-maturity Securities, Fair Value | 3,761,004 | 4,193,154
Redeemable Preferred Stock |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 344 | 191
Held-to-maturity Securities, Fair Value | 11,268 | 11,421
Industrial, miscellaneous and all other equity securities |  |
Available-for-sale Debt Securities, Gross Unrealized Loss |  | 632,669
Equity Securities |  |
Available-for-sale Debt Securities, Gross Unrealized Loss |  | 632,669
Less than 12 months |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 1,643,530 | 757,039
Held-to-maturity Securities, Fair Value | 88,667,957 | 65,901,527
Fair Value |  | 847,718
Less than 12 months | USTreasurySecurities1Member |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 897,420 | 532,010
Held-to-maturity Securities, Fair Value | 51,456,932 | 51,606,699
Less than 12 months | US States and Political Subdivisions Debt Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 17,903 | 296
Held-to-maturity Securities, Fair Value | 1,419,010 | 214,882
Less than 12 months | Corporate Debt Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 620,598 | 167,786
Held-to-maturity Securities, Fair Value | 33,678,083 | 11,551,865
Less than 12 months | Collateralized Mortgage Backed Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 107,265 | 56,756
Held-to-maturity Securities, Fair Value | 2,102,664 | 2,516,660
Less than 12 months | Redeemable Preferred Stock |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 344 | 191
Held-to-maturity Securities, Fair Value | 11,268 | 11,421
Less than 12 months | Industrial, miscellaneous and all other equity securities |  |
Available-for-sale Debt Securities, Gross Unrealized Loss |  | $ 213,097
No. of Investment Positions |  | 98
Less than 12 months | Equity Securities |  |
Available-for-sale Debt Securities, Gross Unrealized Loss |  | $ 213,097
No. of Investment Positions |  | 98
More than 12 months |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 1,017,286 | $ 1,063,223
Held-to-maturity Securities, Fair Value | 16,337,085 | 17,738,153
Fair Value |  | 1,329,213
More than 12 months | USTreasurySecurities1Member |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 63,356 | 47,413
Held-to-maturity Securities, Fair Value | 623,360 | 643,380
More than 12 months | US States and Political Subdivisions Debt Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 127,648 | 70,717
Held-to-maturity Securities, Fair Value | 2,690,329 | 2,225,021
More than 12 months | Corporate Debt Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 684,528 | 839,718
Held-to-maturity Securities, Fair Value | 11,365,056 | 13,193,258
More than 12 months | Collateralized Mortgage Backed Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 141,754 | 105,375
Held-to-maturity Securities, Fair Value | 1,658,340 | 1,676,494
More than 12 months | Industrial, miscellaneous and all other equity securities |  |
Available-for-sale Debt Securities, Gross Unrealized Loss |  | $ 419,572
No. of Investment Positions |  | 81
More than 12 months | Equity Securities |  |
Available-for-sale Debt Securities, Gross Unrealized Loss |  | $ 419,572
No. of Investment Positions |  | 81
TotalMember |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 2,660,816 | $ 1,820,262
TotalMember | USTreasurySecurities1Member |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 960,776 | 579,423
TotalMember | US States and Political Subdivisions Debt Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 145,551 | 71,013
TotalMember | Corporate Debt Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 1,305,126 | 1,007,504
TotalMember | Collateralized Mortgage Backed Securities |  |
Held-to-maturity Securities, Unrecognized Holding Loss | 249,019 | 162,131
TotalMember | Redeemable Preferred Stock |  |
Held-to-maturity Securities, Unrecognized Holding Loss | $ 344 | $ 191

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