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Investments Short-Term Investments (Details) (Steel Excel, USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2014
Available for sale securities
Dec. 31, 2013
Available for sale securities
Mar. 31, 2014
Amounts classified as cash equivalents
Dec. 31, 2013
Amounts classified as cash equivalents
Mar. 31, 2014
Amounts classified as marketable securities
Dec. 31, 2013
Amounts classified as marketable securities
Mar. 31, 2014
Short-term deposits
Available for sale securities
Dec. 31, 2013
Short-term deposits
Available for sale securities
Mar. 31, 2014
Mutual funds
Available for sale securities
Dec. 31, 2013
Mutual funds
Available for sale securities
Mar. 31, 2014
United States government securities
Available for sale securities
Dec. 31, 2013
United States government securities
Available for sale securities
Mar. 31, 2014
Equity securities
Available for sale securities
Dec. 31, 2013
Equity securities
Available for sale securities
Mar. 31, 2014
Commercial paper
Available for sale securities
Dec. 31, 2013
Commercial paper
Available for sale securities
Mar. 31, 2014
Corporate obligations
Available for sale securities
Dec. 31, 2013
Corporate obligations
Available for sale securities
Marketable Securities, Cost to Fair Value Reconciliation [Abstract]                                      
Cost $ (226,280) $ (226,280) $ (229,863) $ (43,935) $ (61,909) $ (182,345) $ (167,954) $ (41,035) $ (60,909) $ (15,722) $ (15,723) $ (23,889) $ (50,356) $ (105,186) $ (69,720) $ (4,499) $ (1,799) $ (35,949) $ (31,356)
Gross Unrealized Gains   20,554 15,988     20,554 15,988 0 0 4,946 5,060 26 23 13,940 10,020 0 0 1,642 885
Gross Unrealized Losses   (3,933) (5,457)     (3,933) (5,457) 0 0 0 0 0 0 (3,930) (5,181) 0 0 (3) (276)
Fair value (242,901) (242,901) (240,394) (43,935) (61,909) (198,966) (178,485) (41,035) (60,909) (20,668) (20,783) (23,915) (50,379) (115,196) (74,559) (4,499) (1,799) (37,588) (31,965)
Securities sold during the period 40,600                                    
Gross gains from sales 3,200                                    
Gross losses from sales $ 209