Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Fixed maturity securities, fair value	$ 716,856	$ 664,371
Fixed maturity securities, cost	341,591	327,004
Equity securities, cost	$ 0	$ 0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	20,268,042	20,155,936
Common stock, shares outstanding	19,009,792	18,897,686
Treasury stock, shares	1,258,250	1,258,250