Property, plant and equipment, net

3 Months Ended

Mar. 31, 2016

9. Property, plant and equipment, net

Property, plant and equipment, net consist of the following:


	As of December 31,			As of March 31,
	2015			2016
Property, plant and equipment, gross	$	556,518		$	569,559
Less: Accumulated depreciation and amortization		(381,122	)		(389,860	)

Property, plant and equipment, net	$	175,396		$	179,699

Depreciation expense on property, plant and equipment for the three months ended March 31, 2015 and 2016 was $11,717 and $11,104, respectively. Computer software amortization for the three months ended March 31, 2015 and 2016 amounted to $2,362 and $2,345, 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 $562 and $294 for the three months ended March 31, 2015 and 2016, respectively.