Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Premiums:
Life insurance	$ 44,667	$ 42,223	$ 86,064	$ 81,637
Accident and health insurance	390	406	741	755
Property insurance	1,272	1,205	2,537	2,382
Net investment income	10,083	9,265	19,989	17,654
Realized investment gains (losses), net	(73)	82	(129)	113
Other income	163	427	332	613
Total revenue	56,502	53,608	109,534	103,154
Insurance benefits paid or provided:
Claims and surrenders	16,668	16,660	33,125	31,466
Increase in future policy benefit reserves	19,979	17,896	37,677	34,855
Policyholders' dividends	2,412	2,235	4,514	4,309
Total insurance benefits paid or provided	39,059	36,791	75,316	70,630
Commissions	10,403	10,429	20,313	19,487
Other general expenses	7,448	7,342	13,950	14,041
Capitalization of deferred policy acquisition costs	(7,423)	(7,672)	(14,491)	(14,034)
Amortization of deferred policy acquisition costs	4,893	4,363	10,102	8,989
Amortization of cost of customer relationships acquired	614	560	1,145	1,138
Total benefits and expenses	54,994	51,813	106,335	100,251
Income before federal income tax	1,508	1,795	3,199	2,903
Federal income tax expense	358	488	852	740
Net income	1,150	1,307	2,347	2,163
Unrealized gains (losses) on available-for-sale securities:
Unrealized holding gains (losses) arising during period	12,296	(25,544)	26,392	(25,448)
Reclassification adjustments for (gains) losses included in net income	73	(73)	105	(104)
Unrealized gains (losses) on available-for-sale securities, net	12,369	(25,617)	26,497	(25,552)
Income tax expense (benefit) on unrealized gains (losses) on available-for-sale securities	4,340	(8,953)	9,294	(8,926)
Other comprehensive income (loss)	8,029	(16,664)	17,203	(16,626)
Comprehensive income (loss)	$ 9,179	$ (15,357)	$ 19,550	$ (14,463)
Common Stock Class A [Member]
Earnings Per Share [Abstract]
Basic earnings per share (in dollars per share)	$ 0.03	$ 0.03	$ 0.05	$ 0.05
Diluted earnings per share (in dollars per share)	$ 0.03	$ 0.03	$ 0.05	$ 0.05
Common Stock Class B [Member]
Earnings Per Share [Abstract]
Basic earnings per share (in dollars per share)	$ 0.01	$ 0.01	$ 0.02	$ 0.02
Diluted earnings per share (in dollars per share)	$ 0.01	$ 0.01	$ 0.02	$ 0.02