Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues	$ 69,806	$ 61,467	$ 56,866	$ 62,406	$ 65,570	$ 61,161	$ 59,842	$ 57,433	$ 250,545	$ 244,006	$ 252,627
Benefits and expenses	64,878	59,335	60,189	60,398	67,598	55,599	63,953	54,854	244,800	242,004	255,613
Federal income tax expense (benefit)	(23)	86	1,242	5,810	(596)	12,671	(1,553)	2,542	7,115	13,064	35,141
Net income (loss)	4,951	2,046	(4,565)	(3,802)	(1,432)	(7,109)	(2,558)	37	(1,370)	(11,062)	(38,127)
Subpart F Income									5,853	18,403	0
Increase in future policy benefit reserves									41,712	47,947	76,029
Deferred policy acquisition costs	149,249				155,747				$ 149,249	$ 155,747	$ 167,063	$ 167,790
Common Stock [Member]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 4,951	$ 2,046	$ (4,565)	$ (3,802)	$ (1,432)	$ (7,109)	$ (2,558)	$ 37
Common Stock Class A [Member]
Basic and diluted earnings (losses) per share common stock	$ 0.10	$ 0.04	$ (0.09)	$ (0.08)	$ (0.03)	$ (0.14)	$ (0.05)	$ 0.00	$ (0.03)	$ (0.22)	$ (0.77)
Common Stock Class B [Member]
Basic and diluted earnings (losses) per share common stock	$ 0.05	$ 0.02	$ (0.04)	$ (0.04)	$ (0.01)	$ (0.07)	$ (0.03)	$ 0.00	$ (0.01)	$ (0.11)	$ (0.38)
Unusual or Infrequent Item, or Both [Member]
Federal income tax expense (benefit)									$ 190	$ 1,230
Net income (loss)									713	4,628
Increase in future policy benefit reserves									(2,299)	(10,197)
Deferred policy acquisition costs	$ 1,396				$ 4,339				$ 1,396	$ 4,339