Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Schedule of inventory

Inventories consist of the following at March 31, 2019 and December 31, 2018 (in thousands):

	March 31, 2019		December 31, 2018
Raw materials (1)	$	127,622	$	122,825
Work-in-process (1)	84,801		70,458
Finished goods (1)	118,968		128,896
Total	$	331,391	$	322,179

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(1) The components of inventory shown in the table above are net of allowance for obsolescence.