Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Unrealized gains (losses) arising during period, net									$ 48,753	$ 76,898	$ (31,592)
Premiums:
Life insurance									170,328	178,351	181,825
Accident and health insurance									1,019	1,383	1,218
Property insurance									3,982	4,613	4,817
Net investment income									60,197	59,531	54,205
Realized investment gains, net									1,502	5,249	108
Other income									1,828	1,418	1,833
Total revenue	$ 64,968	$ 59,825	$ 58,341	$ 55,722	$ 69,806	$ 61,467	$ 56,866	$ 62,406	238,856	250,545	244,006
Insurance benefits paid or provided:
Claims and surrenders									121,145	106,827	91,103
Increase in future policy benefit reserves									29,923	41,712	47,947
Policyholders' dividends									5,587	6,040	6,362
Total insurance benefits paid or provided									156,655	154,579	145,412
Commissions									32,069	34,222	34,962
Other general expenses									53,669	48,440	47,632
Capitalized deferred policy acquisition costs									(20,475)	(22,255)	(22,695)
Amortization of deferred policy acquisition costs									27,439	28,268	34,235
Amortization of cost of customer relationships acquired									1,816	1,546	2,458
Total benefits and expenses	67,317	67,996	57,903	57,957	64,878	59,335	60,189	60,398	251,173	244,800	242,004
Income (loss) before federal income tax									(12,317)	5,745	2,002
Federal income tax expense (benefit)	(3,887)	(256)	1,465	1,349	(23)	86	1,242	5,810	(1,329)	7,115	13,064
Net income (loss)	$ 1,538	$ (7,915)	$ (1,027)	$ (3,584)	$ 4,951	$ 2,046	$ (4,565)	$ (3,802)	(10,988)	(1,370)	(11,062)
Other Comprehensive Income (Loss) [Abstract]
Unrealized holding gains arising during period less Effects of DAC and CCRA, before tax									48,642	78,825
Unrealized holding losses arising during the period Less Effects of DAC and CCRA, Before Tax											(30,639)
Unrealized gains (losses) on available-for-sale securities:
Reclassification adjustments for losses (gains) included in net income									111	(1,927)	(953)
Unrealized gains (losses) arising during period, net									48,753	76,898	(31,592)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent									(2,385)	5,147	(6,464)
Other comprehensive income (loss)									51,138	71,751	(25,128)
Total comprehensive income (loss)									$ 40,150	$ 70,381	$ (36,190)
Common Stock Class A [Member]
Earnings Per Share [Abstract]
Basic and diluted earnings (losses) per share (in dollars per share)	$ 0.03	$ (0.16)	$ (0.02)	$ (0.07)	$ 0.10	$ 0.04	$ (0.09)	$ (0.08)	$ (0.22)	$ (0.03)	$ (0.22)
Common Stock Class B [Member]
Earnings Per Share [Abstract]
Basic and diluted earnings (losses) per share (in dollars per share)	$ 0.01	$ (0.07)	$ (0.01)	$ (0.04)	$ 0.05	$ 0.02	$ (0.04)	$ (0.04)	$ (0.11)	$ (0.01)	$ (0.11)