Inventories (Tables)

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following at December 31:

(In thousands)	2020		2019
Raw materials:
Fluids systems	$	98,974	$	141,314
Industrial solutions	6,315		5,049
Total raw materials	105,289		146,363
Blended fluids systems components	31,744		39,542
Finished goods - mats	10,824		10,992
Total inventories	$	147,857	$	196,897