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, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	$ 23,941	$ 26,823
Less than 12 months, Gross Unrealized Losses	(1,021)	(272)
12 months or longer, Fair value	13,980	212
12 months or longer, Gross Unrealized Losses	(1,270)	(78)
Total Gross Unrealized Losses	(2,291)	(350)
U.S. Government and Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	988
Less than 12 months, Gross Unrealized Losses	(16)
12 months or longer, Fair value
12 months or longer, Gross Unrealized Losses
Total Gross Unrealized Losses	(16)
State [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value
Less than 12 months, Gross Unrealized Losses
12 months or longer, Fair value
12 months or longer, Gross Unrealized Losses
Total Gross Unrealized Losses
Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value
Less than 12 months, Gross Unrealized Losses
12 months or longer, Fair value
12 months or longer, Gross Unrealized Losses
Total Gross Unrealized Losses
Revenue and Assessment [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	983	702
Less than 12 months, Gross Unrealized Losses	(11)	(6)
12 months or longer, Fair value
12 months or longer, Gross Unrealized Losses
Total Gross Unrealized Losses	(11)	(6)
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	21,781	25,997
Less than 12 months, Gross Unrealized Losses	(993)	(246)
12 months or longer, Fair value	13,980
12 months or longer, Gross Unrealized Losses	(1,270)
Total Gross Unrealized Losses	(2,263)	(246)
Agency Backed [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value
Less than 12 months, Gross Unrealized Losses
12 months or longer, Fair value
12 months or longer, Gross Unrealized Losses
Total Gross Unrealized Losses
Non-Agency Backed - Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value	189	124
Less than 12 months, Gross Unrealized Losses	(1)	(20)
12 months or longer, Fair value		212
12 months or longer, Gross Unrealized Losses		(78)
Total Gross Unrealized Losses	(1)	(98)
Non-Agency Backed - Commercial [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value
Less than 12 months, Gross Unrealized Losses
12 months or longer, Fair value
12 months or longer, Gross Unrealized Losses
Total Gross Unrealized Losses
Redeemable Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value
Less than 12 months, Gross Unrealized Losses
12 months or longer, Fair value
12 months or longer, Gross Unrealized Losses
Total Gross Unrealized Losses
Mutual Fund, Available-for-Sale [Member]
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Fair value
Less than 12 months, Gross Unrealized Losses
12 months or longer, Fair value
12 months or longer, Gross Unrealized Losses
Total Gross Unrealized Losses