Investments - Summary of Company's Investment Securities (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2016	Dec. 31, 2015
Investment Securities [Line Items]
Amortized Cost	$ 119,780	$ 128,304
Gross Unrealized Gains	3,020	4,710
Gross Unrealized Losses	(154)	(1,432)
Fair Value	122,646	131,582
Fixed Maturities
Investment Securities [Line Items]
Amortized Cost	104,942	114,845
Gross Unrealized Gains	2,144	4,367
Gross Unrealized Losses	(135)	(770)
Fair Value	106,951	118,442
Fixed Maturities \| U.S. government and agencies
Investment Securities [Line Items]
Amortized Cost	19,141	13,036
Gross Unrealized Gains	246	162
Gross Unrealized Losses	(7)	(85)
Fair Value	19,380	13,113
Fixed Maturities \| Political subdivisions
Investment Securities [Line Items]
Amortized Cost	4,264	4,354
Gross Unrealized Gains	55	9
Fair Value	4,319	4,363
Fixed Maturities \| Revenue and assessment
Investment Securities [Line Items]
Amortized Cost	5,639	11,770
Gross Unrealized Gains	308	895
Gross Unrealized Losses		(21)
Fair Value	5,947	12,644
Fixed Maturities \| Corporate bonds
Investment Securities [Line Items]
Amortized Cost	48,419	79,426
Gross Unrealized Gains	391	2,022
Gross Unrealized Losses	(106)	(663)
Fair Value	48,704	80,785
Fixed Maturities \| Collateralized mortgage obligations: Agency Backed
Investment Securities [Line Items]
Amortized Cost	23,553	793
Gross Unrealized Gains	86	80
Gross Unrealized Losses	(15)
Fair Value	23,624	873
Fixed Maturities \| Collateralized mortgage obligations: Non-agency backed - residential
Investment Securities [Line Items]
Amortized Cost	2,493	2,877
Gross Unrealized Gains	569	579
Gross Unrealized Losses	(7)	(1)
Fair Value	3,055	3,455
Fixed Maturities \| Collateralized mortgage obligations: Non-agency backed - commercial
Investment Securities [Line Items]
Amortized Cost	1,433	1,891
Gross Unrealized Gains	489	616
Fair Value	1,922	2,507
Fixed Maturities \| State
Investment Securities [Line Items]
Amortized Cost		698
Gross Unrealized Gains		4
Fair Value		702
Preferred stock, available-for-sale
Investment Securities [Line Items]
Amortized Cost	3,025	1,500
Gross Unrealized Gains	307	223
Gross Unrealized Losses	(19)
Fair Value	3,313	1,723
Mutual funds, available-for-sale
Investment Securities [Line Items]
Amortized Cost	11,813	11,959
Gross Unrealized Gains	569	120
Gross Unrealized Losses		(662)
Fair Value	$ 12,382	$ 11,417

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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
-Name Accounting Standards Codification
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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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