Investments (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2017 USD ($) Security Loans	Mar. 31, 2016 USD ($)	Dec. 31, 2017	Dec. 31, 2016 USD ($) Security Loans	Dec. 31, 2015 USD ($)	Jun. 30, 2016 USD ($)
Fixed maturities [Abstract]
Original or amortized cost	$ 169,852,287			$ 170,595,860
Gross unrealized gains	21,151,748			18,312,061
Gross unrealized losses	(944,354)			(1,668,203)
Estimated fair value	190,059,681			187,239,718
Equity securities [Abstract]
Original or amortized cost	39,114,668			37,014,712
Gross unrealized gains	16,221,003			15,214,862
Gross unrealized losses	(606,134)			(522,471)
Estimated fair value	54,729,537			51,707,103
Total [Abstract]
Original or amortized cost	208,966,955			207,610,572
Gross unrealized gains	37,372,751			33,526,923
Gross unrealized losses	(1,550,488)			(2,190,674)
Estimated fair value	244,789,218			238,946,821
Amortized cost of debt securities, by contractual maturity [Abstract]
Due in one year or less	9,173,834
Due after one year through five years	33,225,931
Due after five years through ten years	44,064,242
Due after ten years	83,388,280
Original or amortized cost	169,852,287			170,595,860
Estimated fair value of debt securities, by contractual maturity [Abstract]
Due in one year or less	9,367,112
Due after one year through five years	48,311,584
Due after five years through ten years	47,358,567
Due after ten years	85,022,418
Estimated fair value	190,059,681			187,239,718
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities [Abstract]
Other than temporary impairments:	484,347	$ 0
Trading Securities [Abstract]
The fair value of derivatives included in trading security assets	0			2,500
The fair value of derivatives included in trading security liabilities	0			$ (1,439)
Fair value of security at time of reclassification	0					$ 0
Net realized gains (losses)	(111,531)	14,539
Net unrealized gains (losses)	110,470	0
Increase (Decrease) in Trading Securities [Abstract]
Net unrealized and realized gains (losses)	$ (1,061)	$ 14,539
Loans and Leases Receivable Disclosure [Line Items]
Number of Mortgage Loans including Discounted Mortgage Loans	12.00%			12.00%
Mortgage Loans including Discounted Mortgage Loans	$ 605,000			$ 6,935,273
Servicing Fee on Loan Percent	0.25%	0.25%
Loan Origination Percent	0.50%	0.50%
Average purchase price to outstanding loan	32.00%	32.00%
Loan limit threshold for appraised property value	80.00%	80.00%
Mortgage loans reserve	$ 0	$ 0
Discounted mortgage loan portfolio payment performance [Abstract]
Number of discounted loans with no payments | Loans	8			8
Number of discounted loans one time payment received | Loans	1			1
Number of discounted loans irregular payments received | Loans	2			2
Number of discounted loans periodic payments received | Loans	5			5
Number of discounted loans | Loans	16			16
Discounted loans with no payments	$ 0			$ 0
Discounted loans with one time payment received	0			0
Discounted loans with irregular payments received	20,834			20,834
Discounted loans with periodic payments received	2,147,779			2,168,062
Discounted loans	2,168,613			2,188,896
Discounted mortgage loan holdings [Abstract]
In good standing	16,459,792			16,388,477
Overdue interest over 90 days	20,834			20,834
Restructured	57,827			60,827
In process of foreclosure	2,089,951			2,107,234
Total discounted mortgage loans	18,628,404			18,577,372
Total foreclosed loans during the year	0				$ 735,000
Notes Receivable [Abstract]
Valuation allowance	0	0
U.S. Government and Government Agencies and Authorities [Member]
Fixed maturities [Abstract]
Original or amortized cost	9,061,015			9,058,210
Gross unrealized gains	57,319			74,581
Gross unrealized losses	(88,717)			(96,981)
Estimated fair value	9,029,617			9,035,810
Amortized cost of debt securities, by contractual maturity [Abstract]
Original or amortized cost	9,061,015			9,058,210
Estimated fair value of debt securities, by contractual maturity [Abstract]
Estimated fair value	9,029,617			9,035,810
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	6,587,323			6,578,248
Less than 12 months, unrealized losses	(88,717)			(96,981)
12 months or longer, fair value	0			0
12 months or longer, unrealized losses	0			0
Total fair value	6,587,323			6,578,248
Total unrealized losses	(88,717)			(96,981)
US Special Revenue and Assessments [Member]
Fixed maturities [Abstract]
Original or amortized cost	10,146,927			10,145,531
Gross unrealized gains	927,999			1,002,789
Gross unrealized losses	(11,346)			(14,043)
Estimated fair value	11,063,580			11,134,277
Amortized cost of debt securities, by contractual maturity [Abstract]
Original or amortized cost	10,146,927			10,145,531
Estimated fair value of debt securities, by contractual maturity [Abstract]
Estimated fair value	11,063,580			11,134,277
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	977,170			974,250
Less than 12 months, unrealized losses	(11,346)			(14,043)
12 months or longer, fair value	0			0
12 months or longer, unrealized losses	0			0
Total fair value	977,170			974,250
Total unrealized losses	(11,346)			(14,043)
States, Municipalities and Political Subdivisions [Member]
Fixed maturities [Abstract]
Original or amortized cost	0			0
Gross unrealized gains	0			0
Gross unrealized losses	0			0
Estimated fair value	0			0
Amortized cost of debt securities, by contractual maturity [Abstract]
Original or amortized cost	0			0
Estimated fair value of debt securities, by contractual maturity [Abstract]
Estimated fair value	0			0
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value				0
Less than 12 months, unrealized losses				0
12 months or longer, fair value				0
12 months or longer, unrealized losses				0
Total fair value				0
Total unrealized losses				0
Collateralized Mortgage Obligations [Member]
Fixed maturities [Abstract]
Original or amortized cost	0			0
Gross unrealized gains	0			0
Gross unrealized losses	0			0
Estimated fair value	0			0
Amortized cost of debt securities, by contractual maturity [Abstract]
Original or amortized cost	0			0
Estimated fair value of debt securities, by contractual maturity [Abstract]
Estimated fair value	0			0
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	0			0
Less than 12 months, unrealized losses	0			0
12 months or longer, fair value	0			0
12 months or longer, unrealized losses	0			0
Total fair value	0			0
Total unrealized losses	0			0
Public Utilities [Member]
Fixed maturities [Abstract]
Original or amortized cost	0			0
Gross unrealized gains	0			0
Gross unrealized losses	0			0
Estimated fair value	0			0
Amortized cost of debt securities, by contractual maturity [Abstract]
Original or amortized cost	0			0
Estimated fair value of debt securities, by contractual maturity [Abstract]
Estimated fair value	0			0
Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	43,812,319			57,713,985
Less than 12 months, unrealized losses	(813,046)			(1,519,852)
12 months or longer, fair value	3,011,290			4,023,510
12 months or longer, unrealized losses	(131,308)			(148,351)
Total fair value	46,823,609			61,737,495
Total unrealized losses	$ (944,354)			$ (1,668,203)
Less than 12 months, number of securities | Security	19			25
Twelve months or longer, number of securities | Security	2			3
Total number of securities | Security	21			28
Equity Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 4,669,370			$ 4,703,033
Less than 12 months, unrealized losses	(606,134)			(522,471)
12 months or longer, fair value	0			0
12 months or longer, unrealized losses	0			0
Total fair value	4,669,370			4,703,033
Total unrealized losses	$ (606,134)			$ (522,471)
Less than 12 months, number of securities | Security	3			3
Twelve months or longer, number of securities | Security	0			0
Total number of securities | Security	3			3
All Other Corporate Bonds [Member]
Fixed maturities [Abstract]
Original or amortized cost	$ 150,644,345			$ 151,392,119
Gross unrealized gains	20,166,430			17,234,691
Gross unrealized losses	(844,291)			(1,557,179)
Estimated fair value	169,966,484			167,069,631
Amortized cost of debt securities, by contractual maturity [Abstract]
Original or amortized cost	150,644,345			151,392,119
Estimated fair value of debt securities, by contractual maturity [Abstract]
Estimated fair value	169,966,484			167,069,631
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	36,247,826			50,161,487
Less than 12 months, unrealized losses	(712,983)			(1,408,828)
12 months or longer, fair value	3,011,290			4,023,510
12 months or longer, unrealized losses	(131,308)			(148,351)
Total fair value	39,259,116			54,184,997
Total unrealized losses	(844,291)			$ (1,557,179)
Real Estate [Member]
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities [Abstract]
Other than temporary impairments:	$ 484,347	$ 0
Farm Loans [Member] | Maximum [Member]
Loans and Leases Receivable Disclosure [Line Items]
Commercial loans maximum rate			5.00%	5.00%
Farm Loans [Member] | Minimum [Member]
Loans and Leases Receivable Disclosure [Line Items]
Commercial loans maximum rate			5.00%	5.00%
Commercial Loans [Member] | Maximum [Member]
Loans and Leases Receivable Disclosure [Line Items]
Commercial loans maximum rate			8.00%	8.00%
Commercial Loans [Member] | Minimum [Member]
Loans and Leases Receivable Disclosure [Line Items]
Commercial loans maximum rate			4.00%	4.00%
Residential Loans [Member] | Maximum [Member]
Loans and Leases Receivable Disclosure [Line Items]
Commercial loans maximum rate			8.00%	8.00%
Residential Loans [Member] | Minimum [Member]
Loans and Leases Receivable Disclosure [Line Items]
Commercial loans maximum rate			3.94%	3.94%