CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fixed maturities, available for sale, amortized cost	$ 7,173,235	$ 7,152,127
Equity securities, available for sale, cost	$ 143,203	$ 134,013
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	65,215,048	64,917,683
Treasury stock, shares	24,672,932	24,672,932