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Fair Value Option (Tables)
 6 Months Ended
Jun. 30, 2013
Fair Value Option [Abstract]  
Gains And Losses Due To Changes In Fair Value Of Investments
The following table presents (losses) gains due to changes in fair value of investments that are measured at fair value pursuant to application of the fair value option:
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2013
 
2012
 
2013
 
2012
 
(Amounts in thousands)
Fixed maturity securities
$
(59,562
)
 
$
9,812

 
$
(69,973
)
 
$
30,815

Equity securities
(19,003
)
 
(33,972
)
 
35,023

 
(5,476
)
Short-term investments
(161
)
 
(628
)
 
(309
)
 
(784
)
Total
$
(78,726
)
 
$
(24,788
)
 
$
(35,259
)
 
$
24,555