Statutory Financial Information and Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Insurance [Abstract]
Capital and surplus of the Insurance Companies	$ 98,800,000	$ 96,600,000
Statutory net income (loss) of the Insurance Companies	$ (7,300,000)	$ 1,000,000	$ 4,200,000
Maximum dividends to be paid as a percentage of statutory capital and surplus without the prior approval of the Texas insurance commissioner	10.00%
Ordinary dividends received	$ 0