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Accumulated Other Comprehensive Loss (Tables)
 9 Months Ended
Sep. 30, 2013
Equity [Abstract]  
Accumulated Other Comprehensive Income (Loss)
The following table presents changes in Accumulated other comprehensive loss, net of tax by component for the nine months ended September 30, 2013 (in thousands):
 
 
Unrealized Gains (Losses) on Available-for-Sale Securities
 
Foreign Currency Translation Adjustments
 
Total
Balance January 1, 2013
 
$
114,319

 
$
—

 
$
114,319

Other comprehensive income
 
13,604

 
(5,098
)
 
8,506

Reclassification of gain on investment in Knight Common Stock
 
(127,972
)
 
—

 
(127,972
)
Net current-period other comprehensive loss
 
(114,368
)
 
(5,098
)
 
(119,466
)
 
 
 
 
 
 
 
Balance September 30, 2013
 
$
(49
)
 
$
(5,098
)
 
$
(5,147
)