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Investments - Investment Income (Expense) Comprised Primarily of Interest and Dividends (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Investment Income [Line Items]
Total investment income	$ 1,947	$ 1,103	$ 4,982	$ 3,088
Less: Investment expenses	(640)	(459)	(1,606)	(1,514)
Net investment (expense) income	1,307	644	3,376	1,574
Fixed Maturities [Member]
Net Investment Income [Line Items]
Investment income	1,479	884	4,001	2,394
Equity Securities [Member]
Net Investment Income [Line Items]
Investment income	277	182	540	636
Short-term Investments [Member]
Net Investment Income [Line Items]
Investment income	89	11	194	11
Other [Member]
Net Investment Income [Line Items]
Investment income	$ 102	$ 26	$ 247	$ 47

X

- Definition

Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 942



-SubTopic 225



-Section S99



-Paragraph 1



-Subparagraph (SX 210.9-04.1-5)



-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Amount of expenses related to the generation of investment income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.9)



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 944



-SubTopic 225



-Section S99



-Paragraph 1



-Subparagraph (SX 210.7-04.2)



-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

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Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 944



-SubTopic 225



-Section S99



-Paragraph 1



-Subparagraph (SX 210.7-04.2)



-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 16



-Article 12

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Amount of income earned from investments in securities. Includes, but is not limited to, dividends, interest, and amortization of premium/discount. Excludes realized gain (loss) on investments.

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