Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Fixed maturities available for sale, at amortized cost	$ 370,967	$ 290,951
Equity securities, cost	$ 32,439	$ 30,555
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	30,441,410	29,794,960
Common stock, shares outstanding	30,441,410	29,794,960