CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Amortized cost of investments	$ 117,902	$ 128,304
Allowance for premiums, fees and Commission receivable	$ 279	$ 454
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	41,160,000	41,060,000
Common stock, shares outstanding	41,160,000	41,060,000
Accumulated Other Comprehensive Income, tax	$ (1,110)	$ 62