Investments - Summary of Company's Investment Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Investment Securities [Line Items]
Amortized Cost	$ 115,233	$ 117,902
Gross Unrealized Gains	2,818	2,389
Gross Unrealized Losses	(2,039)	(3,079)
Fair Value	116,012	117,212
Fixed Maturities
Investment Securities [Line Items]
Amortized Cost	100,395	103,064
Gross Unrealized Gains	1,663	1,493
Gross Unrealized Losses	(1,999)	(2,968)
Fair Value	100,059	101,589
Fixed Maturities \| U.S. government and agencies
Investment Securities [Line Items]
Amortized Cost	19,641	19,142
Gross Unrealized Gains	96	112
Gross Unrealized Losses	(238)	(303)
Fair Value	19,499	18,951
Fixed Maturities \| Political subdivisions
Investment Securities [Line Items]
Amortized Cost	4,173	4,233
Gross Unrealized Gains	10
Gross Unrealized Losses		(68)
Fair Value	4,183	4,165
Fixed Maturities \| Revenue and assessment
Investment Securities [Line Items]
Amortized Cost	5,255	5,539
Gross Unrealized Gains	208	185
Gross Unrealized Losses		(41)
Fair Value	5,463	5,683
Fixed Maturities \| Corporate bonds
Investment Securities [Line Items]
Amortized Cost	45,908	47,238
Gross Unrealized Gains	67	107
Gross Unrealized Losses	(1,146)	(1,805)
Fair Value	44,829	45,540
Fixed Maturities \| Collateralized mortgage obligations: Agency Backed
Investment Securities [Line Items]
Amortized Cost	22,149	23,093
Gross Unrealized Gains	68	73
Gross Unrealized Losses	(607)	(744)
Fair Value	21,610	22,422
Fixed Maturities \| Collateralized mortgage obligations: Non-agency backed - residential
Investment Securities [Line Items]
Amortized Cost	2,213	2,411
Gross Unrealized Gains	560	529
Gross Unrealized Losses	(8)	(7)
Fair Value	2,765	2,933
Fixed Maturities \| Collateralized mortgage obligations: Non-agency backed - commercial
Investment Securities [Line Items]
Amortized Cost	1,056	1,408
Gross Unrealized Gains	654	487
Fair Value	1,710	1,895
Preferred stocks, available-for-sale
Investment Securities [Line Items]
Amortized Cost	3,025	3,025
Gross Unrealized Gains	281	198
Gross Unrealized Losses	(40)	(111)
Fair Value	3,266	3,112
Mutual funds, available-for-sale
Investment Securities [Line Items]
Amortized Cost	11,813	11,813
Gross Unrealized Gains	874	698
Fair Value	$ 12,687	$ 12,511

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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