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3) Investments: Schedule of Unrealized Loss on Investments (Details)
6 Months Ended 12 Months Ended
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Held-to-maturity Securities, Unrecognized Holding Loss $ 3,536,222 $ 1,820,262
Held-to-maturity Securities, Fair Value 113,693,438 83,639,680
Fair Value   2,176,931
USTreasurySecurities1Member    
Held-to-maturity Securities, Fair Value 41,988,669 52,250,079
US States and Political Subdivisions Debt Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 154,442 71,013
Held-to-maturity Securities, Fair Value 4,854,440 2,439,903
Corporate Debt Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 2,033,410 1,007,504
Held-to-maturity Securities, Fair Value 62,093,566 24,745,123
Collateralized Mortgage Backed Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 295,001 162,131
Held-to-maturity Securities, Fair Value 4,745,151 4,193,154
Redeemable Preferred Stock    
Held-to-maturity Securities, Unrecognized Holding Loss 299 191
Held-to-maturity Securities, Fair Value 11,612 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 2,574,516 757,039
Held-to-maturity Securities, Fair Value 97,277,922 65,901,527
Fair Value   847,718
Less than 12 months | USTreasurySecurities1Member    
Held-to-maturity Securities, Unrecognized Holding Loss 980,567 532,010
Held-to-maturity Securities, Fair Value 39,678,285 51,606,699
Less than 12 months | US States and Political Subdivisions Debt Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 27,244 296
Held-to-maturity Securities, Fair Value 2,178,208 214,882
Less than 12 months | Corporate Debt Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 1,474,703 167,786
Held-to-maturity Securities, Fair Value 52,689,981 11,551,865
Less than 12 months | Collateralized Mortgage Backed Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 91,703 56,756
Held-to-maturity Securities, Fair Value 2,719,836 2,516,660
Less than 12 months | Redeemable Preferred Stock    
Held-to-maturity Securities, Unrecognized Holding Loss 299 191
Held-to-maturity Securities, Fair Value 11,612 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 961,706 $ 1,063,223
Held-to-maturity Securities, Fair Value 16,415,516 17,738,153
Fair Value   1,329,213
More than 12 months | USTreasurySecurities1Member    
Held-to-maturity Securities, Unrecognized Holding Loss 72,503 47,413
Held-to-maturity Securities, Fair Value 2,310,384 643,380
More than 12 months | US States and Political Subdivisions Debt Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 127,198 70,717
Held-to-maturity Securities, Fair Value 2,676,232 2,225,021
More than 12 months | Corporate Debt Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 558,707 839,718
Held-to-maturity Securities, Fair Value 9,403,585 13,193,258
More than 12 months | Collateralized Mortgage Backed Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 203,298 105,375
Held-to-maturity Securities, Fair Value 2,025,315 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 3,536,222 $ 1,820,262
TotalMember | USTreasurySecurities1Member    
Held-to-maturity Securities, Unrecognized Holding Loss 1,053,070 579,423
TotalMember | US States and Political Subdivisions Debt Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 154,442 71,013
TotalMember | Corporate Debt Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 2,033,410 1,007,504
TotalMember | Collateralized Mortgage Backed Securities    
Held-to-maturity Securities, Unrecognized Holding Loss 295,001 162,131
TotalMember | Redeemable Preferred Stock    
Held-to-maturity Securities, Unrecognized Holding Loss $ 299 $ 191