Equity Investees - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Subsidiary, Sale of Stock [Line Items]
Net premium revenues from policies issued by equity investees	$ 42,105	$ 66,145	$ 70,896
Earnings related to equity investees	8,064	11,037	4,326
Goodwill related to equity investees	231,838	220,955	214,492
Equity Method Investments
Subsidiary, Sale of Stock [Line Items]
Goodwill related to equity investees	7,500	9,100
Direct Operations
Subsidiary, Sale of Stock [Line Items]
Net premium revenues from policies issued by equity investees	4,400	6,000	6,400
Earnings related to equity investees	$ 4,100	$ 4,300	$ 1,700