CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Fixed maturity securities, fair value	$ 575,175	$ 561,179
Fixed maturity securities, cost	270,135	244,409
Equity securities, cost	$ 3,447	$ 9,482
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	19,917,709	19,855,430
Common stock, shares outstanding	18,659,459	18,597,180
Treasury stock, shares	1,258,250	1,258,250