Summary of Significant Accounting Policies Error Correction (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2014	Jan. 01, 2014	Dec. 31, 2013
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred policy acquisition costs	$ (167,790,000)				$ (163,692,000)				$ (167,790,000)	$ (163,692,000)	$ (155,859,000)	$ (155,859,000)		$ (145,101,000)
Deferred tax asset	76,869,000				67,145,000				76,869,000	67,145,000	64,122,000	64,122,000
Total assets	1,583,668,000				1,480,751,000				1,583,668,000	1,480,751,000
Life insurance	1,059,722,000				987,373,000				1,059,722,000	987,373,000
Total policy liabilities	(1,216,699,000)				(1,132,280,000)				(1,216,699,000)	(1,132,280,000)
Other liabilities	29,998,000				24,349,000				29,998,000	24,349,000
Total liabilities	1,334,568,000				1,233,825,000				1,334,568,000	1,233,825,000
Accumulated deficit	(16,248,000)				(18,217,000)				(16,248,000)	(18,217,000)
Total liabilities and stockholders' equity	1,583,668,000				1,480,751,000				1,583,668,000	1,480,751,000
Increase in future policy benefit reserves									75,881,000	77,060,000		81,998,000
Total insurance benefits paid or provided									164,080,000	166,686,000		160,369,000
Other general expenses										33,287,000
Amortization of deferred policy acquisition costs									28,515,000	23,400,000		21,083,000
Total benefits and expenses	68,277,000	$ 57,134,000	$ 58,678,000	$ 55,834,000	64,193,000	$ 58,039,000	$ 60,693,000	$ 55,286,000	239,923,000	238,211,000		232,175,000
Income (loss) before federal income tax expense									5,483,000	(1,943,000)		(1,950,000)
Income Tax Expense (Benefit)	(490,000)	1,845,000	1,077,000	1,082,000	208,000	(165,000)	1,153,000	2,000	3,514,000	1,200,000		4,020,000
Net income (loss)	116,000	$ 2,762,000	$ 1,482,000	$ (2,391,000)	(2,197,000)	$ 250,000	$ (1,767,000)	$ 572,000	1,969,000	(3,143,000)	(5,970,000)	(5,970,000)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent									2,174,000	(15,406,000)	13,085,000	13,085,000
Balance	249,100,000				246,926,000				249,100,000	246,926,000	262,332,000	262,332,000	$ 249,247,000	249,247,000
Net deferred policy acquisition costs									(4,217,000)	(7,704,000)		(10,988,000)
Deferred federal income tax expense (benefit)									(9,834,000)	3,515,000		(78,880,000)
Future policy benefit reserves									74,583,000	76,901,000		81,918,000
Commissions payable and other liabilities									6,434,000	617,000		13,003,000
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable									9,287,000	(6,837,000)		78,207,000
Current federal income tax payable	81,270,000				71,982,000				81,270,000	71,982,000
Net cash provided by operating activities									102,271,000	87,153,000		97,934,000
Errors in Valuing DAC and Future Policy Benefits [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred policy acquisition costs					(300,000)					(300,000)
Total policy liabilities					(7,900,000)					(7,900,000)
Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred policy acquisition costs					(165,362,000)					(165,362,000)
Deferred tax asset					68,764,000					68,764,000
Total assets					1,484,040,000					1,484,040,000
Life insurance					995,972,000					995,972,000
Total policy liabilities					(1,140,879,000)					(1,140,879,000)
Other liabilities					24,205,000					24,205,000
Total liabilities					1,241,523,000					1,241,523,000
Accumulated deficit					(22,626,000)					(22,626,000)
Total liabilities and stockholders' equity					1,484,040,000					1,484,040,000
Increase in future policy benefit reserves										77,929,000		82,847,000
Total insurance benefits paid or provided										167,555,000		161,218,000
Other general expenses										33,143,000
Amortization of deferred policy acquisition costs										23,339,000		21,064,000
Total benefits and expenses										238,875,000		233,005,000
Income (loss) before federal income tax expense										(2,607,000)		(2,780,000)
Income Tax Expense (Benefit)										972,000		3,725,000
Net income (loss)										(3,579,000)		(6,505,000)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent										(15,842,000)		12,550,000
Balance					242,517,000					242,517,000	258,359,000	258,359,000		245,809,000
Net deferred policy acquisition costs										7,765,000		11,007,000
Deferred federal income tax expense (benefit)										4,043,000		(79,175,000)
Future policy benefit reserves										77,770,000		82,767,000
Commissions payable and other liabilities										473,000
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable										(7,593,000)
Current federal income tax payable					71,225,000					71,225,000
Net cash provided by operating activities										87,153,000		97,934,000
Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred policy acquisition costs					1,670,000					1,670,000
Deferred tax asset					(1,619,000)					(1,619,000)
Total assets					(3,289,000)					(3,289,000)
Life insurance					(8,599,000)					(8,599,000)
Total policy liabilities					8,599,000					8,599,000
Other liabilities					144,000					144,000
Total liabilities					(7,698,000)					(7,698,000)
Accumulated deficit	$ 3,400,000				4,409,000				$ 3,400,000	4,409,000
Total liabilities and stockholders' equity					(3,289,000)					(3,289,000)
Increase in future policy benefit reserves										(869,000)		(849,000)
Total insurance benefits paid or provided										(869,000)		(849,000)
Other general expenses										144,000
Amortization of deferred policy acquisition costs										61,000		19,000
Total benefits and expenses										(664,000)		(830,000)
Income (loss) before federal income tax expense										664,000		830,000
Income Tax Expense (Benefit)										228,000		295,000
Net income (loss)										436,000		535,000
Comprehensive Income (Loss), Net of Tax, Attributable to Parent										436,000		535,000
Balance					4,409,000					4,409,000	$ 3,973,000	3,973,000		$ 3,438,000
Net deferred policy acquisition costs										(61,000)		(19,000)
Deferred federal income tax expense (benefit)										(528,000)		295,000
Future policy benefit reserves										(869,000)		(849,000)
Commissions payable and other liabilities										144,000
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable										756,000
Current federal income tax payable					$ 757,000					757,000
Net cash provided by operating activities										$ 0		$ 0
Common Class A [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Basic and diluted earnings (losses) per share (in dollars per share)									$ 0.04	$ (0.06)		$ (0.12)
Common Class A [Member] | Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Basic and diluted earnings (losses) per share (in dollars per share)										(0.07)		(0.13)
Common Class A [Member] | Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Basic and diluted earnings (losses) per share (in dollars per share)										0.01		0.01
Common Class B [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Basic and diluted earnings (losses) per share (in dollars per share)									$ 0.02	(0.03)		(0.06)
Common Class B [Member] | Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Basic and diluted earnings (losses) per share (in dollars per share)										(0.04)		(0.07)
Common Class B [Member] | Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Basic and diluted earnings (losses) per share (in dollars per share)										$ 0.01		$ 0.01