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3) Investments: Investments Classified by Contractual Maturity Date (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
AmortizedCost	$ 230,386,875
Held to maturity securities, Estimated fair value	234,224,153
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
AmortizedCost	13,731,279	$ 9,503,016
Held to maturity securities, Estimated fair value	13,542,789	9,551,537
Redeemable Preferred Stock
AmortizedCost	612,023	623,635
Held to maturity securities, Estimated fair value	648,460	$ 673,192
Due in 2017
AmortizedCost	2,899,715
Held to maturity securities, Estimated fair value	2,964,076
Due in 2018 Through 2021
AmortizedCost	66,428,822
Held to maturity securities, Estimated fair value	66,259,870
Due in 2022 Through 2026
AmortizedCost	69,688,359
Held to maturity securities, Estimated fair value	69,760,698
Due After 2026
AmortizedCost	77,026,677
Held to maturity securities, Estimated fair value	$ 81,048,260

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- Definition

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- Definition

Amount, before other-than-temporary impairment (OTTI) accretion, of investment in debt securities measured at amortized cost (held-to-maturity).

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