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DEPRECIATION AND AMORTIZATION
12 Months Ended
Dec. 31, 2017
Depreciation and amortisation expense [abstract]  
DEPRECIATION AND AMORTIZATION
DEPRECIATION AND AMORTIZATION:
 
2017

 
2016

 
 
 
Depreciation of property, plant and equipment (note 9)
$
136,233

 
$
124,738

Adjustment for the variation of depreciation of property, plant and equipment included in inventories at the beginning and end of the year
323

 
(5,430
)
Depreciation of property, plant and equipment included in net earnings
136,556

 
119,308

Amortization of intangible assets, excluding software (note 10)
20,786

 
18,106

Amortization of software (note 10)
4,808

 
3,183

Depreciation and amortization included in net earnings
$
162,150

 
$
140,597