Investments - Summary of Company's Investment Securities (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Investment Securities [Line Items]
Amortized Cost	$ 121,218	$ 128,304
Gross Unrealized Gains	8,007	4,710
Gross Unrealized Losses	(137)	(1,432)
Fair Value	129,088	131,582
Fixed Maturities
Investment Securities [Line Items]
Amortized Cost	107,905	114,845
Gross Unrealized Gains	7,335	4,367
Gross Unrealized Losses	(13)	(770)
Fair Value	115,227	118,442
Fixed Maturities \| U.S. government and agencies
Investment Securities [Line Items]
Amortized Cost	11,187	13,036
Gross Unrealized Gains	437	162
Gross Unrealized Losses	(1)	(85)
Fair Value	11,623	13,113
Fixed Maturities \| State
Investment Securities [Line Items]
Amortized Cost	700	698
Gross Unrealized Gains	3	4
Fair Value	703	702
Fixed Maturities \| Political subdivisions
Investment Securities [Line Items]
Amortized Cost	4,294	4,354
Gross Unrealized Gains	78	9
Fair Value	4,372	4,363
Fixed Maturities \| Revenue and assessment
Investment Securities [Line Items]
Amortized Cost	9,637	11,770
Gross Unrealized Gains	1,526	895
Gross Unrealized Losses		(21)
Fair Value	11,163	12,644
Fixed Maturities \| Corporate bonds
Investment Securities [Line Items]
Amortized Cost	77,027	79,426
Gross Unrealized Gains	4,147	2,022
Gross Unrealized Losses	(4)	(663)
Fair Value	81,170	80,785
Fixed Maturities \| Collateralized mortgage obligations: Agency Backed
Investment Securities [Line Items]
Amortized Cost	771	793
Gross Unrealized Gains	86	80
Fair Value	857	873
Fixed Maturities \| Collateralized mortgage obligations: Non-agency backed - residential
Investment Securities [Line Items]
Amortized Cost	2,616	2,877
Gross Unrealized Gains	515	579
Gross Unrealized Losses	(8)	(1)
Fair Value	3,123	3,455
Fixed Maturities \| Collateralized mortgage obligations: Non-agency backed - commercial
Investment Securities [Line Items]
Amortized Cost	1,673	1,891
Gross Unrealized Gains	543	616
Fair Value	2,216	2,507
Preferred stock, available-for-sale
Investment Securities [Line Items]
Amortized Cost	1,500	1,500
Gross Unrealized Gains	348	223
Fair Value	1,848	1,723
Mutual funds, available-for-sale
Investment Securities [Line Items]
Amortized Cost	11,813	11,959
Gross Unrealized Gains	324	120
Gross Unrealized Losses	(124)	(662)
Fair Value	$ 12,013	$ 11,417

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.

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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.

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

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

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