Investments - Fair Value and Gross Unrealized Losses of Investments, Available-for-Sale, by the Length of Time (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	$ 17,505	$ 23,941
Less than 12 months, Gross Unrealized Losses	(90)	(1,021)
12 months or longer, Fair value	20,567	13,980
12 months or longer, Gross Unrealized Losses	(592)	(1,270)
Total Gross Unrealized Losses	(682)	(2,291)
U.S. Government and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	5,012	988
Less than 12 months, Gross Unrealized Losses	(26)	(16)
Total Gross Unrealized Losses	(26)	(16)
Revenue and Assessment [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	2,820	983
Less than 12 months, Gross Unrealized Losses	(18)	(11)
Total Gross Unrealized Losses	(18)	(11)
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	7,681	21,781
Less than 12 months, Gross Unrealized Losses	(38)	(993)
12 months or longer, Fair value	20,567	13,980
12 months or longer, Gross Unrealized Losses	(592)	(1,270)
Total Gross Unrealized Losses	(630)	(2,263)
Non-Agency Backed - Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value		189
Less than 12 months, Gross Unrealized Losses		(1)
Total Gross Unrealized Losses		(1)
Total Fixed Maturities, Available-for-Sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	15,513	23,941
Less than 12 months, Gross Unrealized Losses	(82)	(1,021)
12 months or longer, Fair value	20,567	13,980
12 months or longer, Gross Unrealized Losses	(592)	(1,270)
Total Gross Unrealized Losses	(674)	(2,291)
Mutual Fund, Available-for-Sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	1,992
Less than 12 months, Gross Unrealized Losses	(8)
Total Gross Unrealized Losses	$ (8)

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

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This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

+ References

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

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