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Derivative Instruments and Hedging Activities (Tables)
3 Months Ended
Mar. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Gain (loss) recognized on non-designated derivative instruments
The following table summarizes the (loss) gain recognized on non-designated foreign-exchange derivative instruments for the three months ended March 31:

 
2013
 
2012
Interest expense
 
$
(815
)
 
$
(1,391
)
Foreign exchange (loss) gain, net
 
1,402

 
(2,434
)
 
 
$
587

 
$
(3,825
)