3) Investments: Held-to-maturity Securities (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2017	Dec. 31, 2016
AmortizedCost	$ 186,445,498	$ 184,979,644
Held-to-maturity Securities, Unrecognized Holding Gain	12,415,912	11,078,349
Held-to-maturity Securities, Unrecognized Holding Loss	(2,874,831)	(4,207,244)
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	195,986,579	191,850,749
US Treasury and Government
AmortizedCost	4,357,040	4,475,065
Held-to-maturity Securities, Unrecognized Holding Gain	244,853	249,028
Held-to-maturity Securities, Unrecognized Holding Loss	(57,240)	(66,111)
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	4,544,653	4,657,982
US States and Political Subdivisions Debt Securities
AmortizedCost	5,995,384	6,017,225
Held-to-maturity Securities, Unrecognized Holding Gain	146,273	153,514
Held-to-maturity Securities, Unrecognized Holding Loss	(132,140)	(133,249)
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	6,009,517	6,037,490
Corporate Debt Securities
AmortizedCost	165,716,233	164,375,636
Held-to-maturity Securities, Unrecognized Holding Gain	11,763,828	10,440,989
Held-to-maturity Securities, Unrecognized Holding Loss	(2,443,238)	(3,727,013)
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	175,036,823	171,089,612
Collateralized Mortgage Backed Securities
AmortizedCost	9,753,206	9,488,083
Held-to-maturity Securities, Unrecognized Holding Gain	246,004	221,400
Held-to-maturity Securities, Unrecognized Holding Loss	(233,586)	(280,871)
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	9,765,624	9,428,612
Redeemable Preferred Stock
AmortizedCost	623,635	623,635
Held-to-maturity Securities, Unrecognized Holding Gain	14,954	13,418
Held-to-maturity Securities, Unrecognized Holding Loss	(8,627)
Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.	$ 629,962	$ 637,053

Represents the monetary amount of HeldToMaturitySecuritiesEstimatedFairValue, as of the indicated date.

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- Definition

Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

+ References

No definition available.

+ Details

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- Definition

Amount of unrecognized gain before loss on investments in held-to-maturity securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

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- Definition

Amount of unrecognized loss before gain on investments in held-to-maturity securities. Excludes write-down for other than temporary impairment (OTTI).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

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