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Property, plant and equipment, net
3 Months Ended
Mar. 31, 2020
Property Plant And Equipment [Abstract]  
Property, plant and equipment, net

9. Property, plant and equipment, net

 

The following table provides the gross and net amount of property, plant and equipment:

 

 

 

As of December 31,

 

 

As of March 31,

 

 

 

2019

 

 

2020

 

Property, plant and equipment, gross

 

$

744,161

 

 

$

728,319

 

Less: Accumulated depreciation and amortization

 

 

(490,126

)

 

 

(482,519

)

Property, plant and equipment, net

 

$

254,035

 

 

$

245,800

 

 

Depreciation expense on property, plant and equipment for the three months ended March 31, 2019 and 2020 was $13,416 and $15,716, respectively.   Computer software amortization for the three months ended March 31, 2019 and 2020 amounted to $2,968 and $3,007, respectively.    

 

The depreciation and amortization expenses set forth above include the effect of the reclassification of foreign exchange (gains) losses related to the effective portion of foreign currency derivative contracts, amounting to $(33) and $(44) for the three months ended March 31, 2019 and 2020.