Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Premiums:
Life insurance	$ 46,155	$ 47,351	$ 89,959	$ 90,124
Accident and health insurance	345	395	673	785
Property insurance	1,239	1,261	2,488	2,537
Net investment income	13,073	12,000	25,812	23,731
Realized investment gains (losses), net	(117)	(26)	1,146	(1,822)
Other income	157	256	355	407
Total revenue	60,852	61,237	120,433	115,762
Insurance benefits paid or provided:
Claims and surrenders	18,952	20,969	40,676	39,974
Increase in future policy benefit reserves	17,820	17,372	32,356	33,098
Policyholders' dividends	1,501	1,816	2,805	3,365
Total insurance benefits paid or provided	38,273	40,157	75,837	76,437
Commissions	9,894	10,777	19,819	20,245
Other general expenses	9,355	8,566	19,511	17,740
Capitalization of deferred policy acquisition costs	(6,883)	(8,103)	(13,784)	(14,367)
Amortization of deferred policy acquisition costs	7,642	6,879	15,017	13,510
Amortization of cost of customer relationships acquired	475	402	994	947
Total benefits and expenses	58,756	58,678	117,394	114,512
Income before federal income tax	2,096	2,559	3,039	1,250
Federal income tax (benefit) expense	1,524	1,077	411	2,159
Net income (loss)	572	1,482	2,628	(909)
Unrealized gains on available-for-sale securities:
Unrealized holding gains arising during period	4,573	16,374	9,710	27,707
Reclassification adjustments for losses included in net income	111	20	(41)	1,816
Unrealized gains on available-for-sale securities, net	4,684	16,394	9,669	29,523
Income tax expense on unrealized gains (losses) on available-for-sale securities	1,639	5,738	3,384	10,333
Other comprehensive income	3,045	10,656	6,285	19,190
Comprehensive income	$ 3,617	$ 12,138	$ 8,913	$ 18,281
Common Stock Class A [Member]
Earnings Per Share [Abstract]
Basic earnings per share (in dollars per share)	$ 0.01	$ 0.03	$ 0.05	$ (0.02)
Diluted earnings per share (in dollars per share)	0.01	0.03	0.05	(0.02)
Common Stock Class B [Member]
Earnings Per Share [Abstract]
Basic earnings per share (in dollars per share)	0.01	0.01	0.03	(0.01)
Diluted earnings per share (in dollars per share)	$ 0.01	$ 0.01	$ 0.03	$ (0.01)