PROPERTY, PLANT, AND EQUIPMENT, NET (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment

Property, plant, and equipment are stated at cost, less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets. The useful lives are as follows:

Category	Useful Life (in years)
Leasehold improvements (1)	Various
Buildings	45-60
Office equipment	3-10
Software	3-10
Machinery and equipment	4-12

(1) Useful lives for leasehold improvements are amortized over the shorter of the economic lives or the term of the lease.

Information regarding the Company's property, plant and equipment is as follows (in thousands):

	December 31,
	2017			2016
Land	$	12,489		$	11,930
Leasehold improvements	54,995			46,125
Buildings	67,465			63,749
Office equipment	18,193			14,440
Software	40,378			20,910
Machinery and equipment	243,939			232,777
Construction-in-progress	32,481			55,890
Property, plant and equipment	469,940			445,821
Accumulated depreciation	(269,310		)	(248,737		)
Property, plant, and equipment, net	$	200,630		$	197,084