2) Investments: Investments Classified by Contractual Maturity Date (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Available-for-sale Securities, Amortized Cost Basis	$ 338,629,810
Available-for-sale Securities	355,977,820	$ 0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Available-for-sale Securities, Amortized Cost Basis	31,475,280	15,358,746
Available-for-sale Securities	31,832,498	15,277,280
Redeemable Preferred Stock
Available-for-sale Securities, Amortized Cost Basis	364,339	103,197
Available-for-sale Securities	364,339	$ 99,975
Due in 2017
Available-for-sale Securities, Amortized Cost Basis	104,805,927
Available-for-sale Securities	104,845,243
Due in 2018 Through 2021
Available-for-sale Securities, Amortized Cost Basis	67,412,618
Available-for-sale Securities	69,126,500
Due in 2022 Through 2026
Available-for-sale Securities, Amortized Cost Basis	71,110,341
Available-for-sale Securities	76,249,550
Due After 2026
Available-for-sale Securities, Amortized Cost Basis	63,461,305
Available-for-sale Securities	$ 73,559,690