Investments - Summary of Proceeds Received and Gross Realized Gains and Losses from Sales of Available for Sale Securities (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fixed-Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds	$ 1,051	$ 18,271	$ 3,285	$ 19,962
Gross Realized Gains	1	799	59	864
Gross Realized Losses	(24)		(30)	(9)
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Proceeds	3,239	3,166	7,994	5,930
Gross Realized Gains	121	433	329	508
Gross Realized Losses	$ (172)	$ (65)	$ (625)	$ (192)

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563

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The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period.

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