CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fixed maturities, available for sale, amortized cost	$ 6,676,545	$ 6,375,237
Equity securities, available for sale, cost	$ 95,071	$ 99,904
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	64,525,999	64,245,048
Treasury stock, shares	23,784,928	23,308,430