Investments - Summary of Company's Investment Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Investment Securities [Line Items]
Amortized Cost	$ 128,304	$ 119,119
Gross Unrealized Gains	4,710	6,648
Gross Unrealized Losses	(1,432)	(682)
Fair Value	131,582	125,085
Fixed Maturities
Investment Securities [Line Items]
Amortized Cost	114,845	107,718
Gross Unrealized Gains	4,367	5,978
Gross Unrealized Losses	(770)	(674)
Fair Value	118,442	113,022
Fixed Maturities \| U.S. government and agencies
Investment Securities [Line Items]
Amortized Cost	13,036	8,039
Gross Unrealized Gains	162	277
Gross Unrealized Losses	(85)	(26)
Fair Value	13,113	8,290
Fixed Maturities \| State
Investment Securities [Line Items]
Amortized Cost	698	698
Gross Unrealized Gains	4	27
Fair Value	702	725
Fixed Maturities \| Political subdivisions
Investment Securities [Line Items]
Amortized Cost	4,354	500
Gross Unrealized Gains	9	6
Fair Value	4,363	506
Fixed Maturities \| Revenue and assessment
Investment Securities [Line Items]
Amortized Cost	11,770	14,856
Gross Unrealized Gains	895	1,522
Gross Unrealized Losses	(21)	(18)
Fair Value	12,644	16,360
Fixed Maturities \| Corporate bonds
Investment Securities [Line Items]
Amortized Cost	79,426	73,051
Gross Unrealized Gains	2,022	2,698
Gross Unrealized Losses	(663)	(630)
Fair Value	80,785	75,119
Fixed Maturities \| Collateralized mortgage obligations: Agency Backed
Investment Securities [Line Items]
Amortized Cost	793	4,647
Gross Unrealized Gains	80	160
Fair Value	873	4,807
Fixed Maturities \| Collateralized mortgage obligations: Non-agency backed - residential
Investment Securities [Line Items]
Amortized Cost	2,877	3,513
Gross Unrealized Gains	579	624
Gross Unrealized Losses	(1)
Fair Value	3,455	4,137
Fixed Maturities \| Collateralized mortgage obligations: Non-agency backed - commercial
Investment Securities [Line Items]
Amortized Cost	1,891	2,414
Gross Unrealized Gains	616	664
Fair Value	2,507	3,078
Preferred stock, available-for-sale
Investment Securities [Line Items]
Amortized Cost	1,500	1,500
Gross Unrealized Gains	223	267
Fair Value	1,723	1,767
Mutual funds, available-for-sale
Investment Securities [Line Items]
Amortized Cost	11,959	9,901
Gross Unrealized Gains	120	403
Gross Unrealized Losses	(662)	(8)
Fair Value	$ 11,417	$ 10,296

Investment securities.

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Trading Securities
-URI http://asc.fasb.org/extlink&oid=6526789

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 35
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Available-for-Sale Securities
-URI http://asc.fasb.org/extlink&oid=6505594

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 1
-Subparagraph a, f, g
-Article 7

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