Losses and Loss Adjustment Expenses Incurred and Paid - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2011
Insurance [Abstract]
Unpaid losses and loss adjustment expenses	$ 5,591	$ (3,038)	$ 4,016	$ (1,721)