Unaudited Condensed Consolidated Balance Sheets (Parenthetical)(USD ($)) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fixed maturity investments trading, amortized cost	$ 6,062,758	$ 6,065,350
Equity securities trading - cost	$ 885,861	$ 647,301
Common stock, shares issued	99,515,760	103,477,452
Common stock, shares outstanding	96,929,091	100,253,646
Treasury stock (shares)	2,586,669	3,223,806