CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Fixed maturities, available for sale, amortized cost	[1]	$ 6,505,016	$ 6,375,237
Equity securities, available for sale, cost		$ 94,089	$ 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		64,510,462	64,245,048
Treasury stock, shares		23,331,930	23,308,430

[1] Fair value includes securities issued by Federal National Mortgage Association (“FNMA”) of $252,549 and $302,222; Federal Home Loan Mortgage Corporation (“FHLMC”) of $435,304 and $432,432; and Government National Mortgage Association (“GNMA”) of $136,356 and $137,867 as of June 30, 2015 and December 31, 2014, respectively.