Reinsurance - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Insurance [Abstract]
Paid losses recoverable outstanding due date	90 days
Return of previous recoveries	$ 2,316,000
Received reinsurance recoveries	$ 2,078,000	$ 5,344,000	$ 2,861,000
Unsecured reinsurance recoverable by reinsurer reporting threshold	1.50%