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Other Income (Expense), net
 3 Months Ended
Mar. 31, 2015
Income Statement [Abstract]  
Other Income (Expense), net
Other Income (Expense), net

"Other income (expense), net" consisted of the following:

 
Three Months Ended March 31,
 
2015
 
2014
 
(in thousands)
Investment income
$
1,564

 
$
1,589

Realized gain on sales of marketable securities, net
135

 
2,991

Realized loss on financial instrument obligations
(186
)
 
—

Realized loss upon change to equity method at fair value
(2,807
)
 
—

Foreign exchange loss
(288
)
 
—

Other
(147
)
 
(63
)
Other income (expense), net
$
(1,729
)
 
$
4,517