Inventory

3 Months Ended

Mar. 31, 2022

Inventory

Inventory

6. Inventory

Inventory as of March 31, 2022 and December 31, 2021 consisted of the following (in thousands):

	March 31,		December 31,
	2022		2021
Raw materials and supplies - production locations	$	247,100	$	187,449
Raw materials and supplies - customer locations		14,301		16,294
Work-in-process		62,558		58,341
Finished goods		9,420		7,079
Inventory	$	333,379	$	269,163