Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Premiums:
Life insurance	$ 44,631	$ 46,155	$ 87,160	$ 89,959
Accident and health insurance	301	345	592	673
Property insurance	1,198	1,239	2,407	2,488
Net investment income	13,811	13,073	27,582	25,812
Realized investment gains (losses), net	(178)	(117)	(753)	1,146
Other income	79	157	287	355
Total revenue	59,842	60,852	117,275	120,433
Insurance benefits paid or provided:
Claims and surrenders	20,617	18,952	41,768	40,676
Increase in future policy benefit reserves	16,555	17,820	31,163	32,356
Policyholders' dividends	1,614	1,501	2,921	2,805
Total insurance benefits paid or provided	38,786	38,273	75,852	75,837
Commissions	8,669	9,894	17,628	19,819
Other general expenses	14,466	9,355	20,973	19,511
Capitalization of deferred policy acquisition costs	(5,640)	(6,883)	(11,603)	(13,784)
Amortization of deferred policy acquisition costs	7,200	7,642	14,806	15,017
Amortization of cost of customer relationships acquired	472	475	1,151	994
Total benefits and expenses	63,953	58,756	118,807	117,394
Income before federal income tax	(4,111)	2,096	(1,532)	3,039
Federal income tax expense	(1,553)	1,524	989	411
Net income (loss)	(2,558)	572	(2,521)	2,628
Unrealized gains (losses) on available-for-sale debt securities:
Unrealized holding gains (losses) arising during period	(12,329)	4,573	(30,427)	9,710
Reclassification adjustments for losses (gains) included in net income	87	111	346	(41)
Unrealized gains on available-for-sale debt securities, net	(12,242)	4,684	(30,081)	9,669
Income tax expense (benefit) on unrealized gains (losses) on available-for-sale securities	(2,571)	1,639	(6,306)	3,384
Other comprehensive income (loss)	(9,671)	3,045	(23,775)	6,285
Comprehensive income (loss)	$ (12,229)	$ 3,617	$ (26,296)	$ 8,913
Common Stock Class A [Member]
Earnings Per Share [Abstract]
Basic and diluted earnings per share (in dollars per share)	$ (0.05)	$ 0.01	$ (0.05)	$ 0.05
Common Stock Class B [Member]
Earnings Per Share [Abstract]
Basic and diluted earnings per share (in dollars per share)	$ (0.03)	$ 0.01	$ (0.03)	$ 0.03