Investments - Schedule of Investments in Fixed Maturity Securities (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 19,958
Gross Unrealized Gains	47
Gross Unrealized Losses	(15)
Fair Value	19,989
U.S. Treasury Securities, Obligations of U.S. Government Agencies and Municipals [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	10,588
Gross Unrealized Gains	4
Gross Unrealized Losses	(4)
Fair Value	10,588
Foreign Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	50
Fair Value	50
Corporate Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	5,583
Gross Unrealized Gains	5
Gross Unrealized Losses	(11)
Fair Value	5,576
Short Duration Fixed Income Fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	3,737
Gross Unrealized Gains	38
Fair Value	$ 3,775