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PROPERTY, PLANT AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	$ 1,843,761	$ 1,633,316
Accumulated depreciation	(827,601)	(598,297)
Impairment	(52,149)	(45,437)
Property, plant and equipment, excluding construction in process, net	964,011	989,582
Construction in process	193,720	56,453
Property, plant and equipment, net	1,157,731	1,046,035
Depreciation expense	197,600	148,034	$ 120,834
Buildings
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	533,647	453,712
Leasehold improvements
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	14,804	14,225
Machinery
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	1,191,780	1,074,460
Furniture, fixtures and equipment
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	75,656	64,117
Motor vehicles
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	7,643	6,351
Land
PROPERTY, PLANT AND EQUIPMENT, NET
Property, plant and equipment, gross	$ 20,231	$ 20,451

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- Definition

Amount of accumulated asset impairment for physical assets used in the normal conduct of business to produce goods and services.

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Represents the net amount of long-lived physical assets, excluding construction in process, used in the normal conduct of business and not intended for resale.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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