Inventory (Tables)

6 Months Ended

Jun. 30, 2019

Inventory [Abstract]

Components Of Inventory

	June 30, 2019		December 31, 2018
Finished goods	$	60,425	$	54,144
Raw materials		15,802		16,795
Work-in-process		11,089		5,544
Supplies and consumables		33,663		30,822
Total	$	120,979	$	107,305