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Other Income (Expense), Net (Tables)
 3 Months Ended
Mar. 31, 2014
Other Income and Expenses [Abstract]  
Details of Components of Other Income Expense, Net
The components of other income (expense), net are as follows:
 
Three Months Ended March 31,
 
2013
 
2014
Foreign currency gains
$
260

 
$
532

Unrealized losses related to forward contracts
(188
)
 
(38
)
Loss on sale of receivables
(373
)
 
(464
)
Miscellaneous expense
(31
)
 
—

Other income (expense), net
$
(332
)
 
$
30