Inventories (Tables)

3 Months Ended

Mar. 31, 2019

Inventory, Net [Abstract]

Schedule of components of inventories

The components of inventories were as follows (in thousands): 

	March 31, 2019		December 31, 2018
Raw materials	$	32,869	$	31,973
Work-in-process	20,077		17,009
Finished goods	136,522		124,321
Inventories	$	189,468	$	173,303