Unaudited Condensed Consolidated Balance Sheets (Parenthetical)(USD ($)) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fixed maturity investments trading, amortized cost	$ 6,074,752	$ 6,065,350
Equity securities trading - cost	$ 901,300	$ 647,301
Common stock, shares issued	100,775,256	103,477,452
Common stock, shares outstanding	96,382,238	100,253,646
Treasury stock (shares)	4,393,018	3,223,806