CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Amortized cost of investments	$ 115,854	$ 126,873
Allowance for premiums and fees receivable	$ 445	$ 311
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000	10,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	41,000	41,000
Common stock, shares outstanding	40,983	40,983