Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following at December 31:

(In thousands)	2019		2018
Raw materials:
Fluids systems	$	141,314	$	148,737
Mats and integrated services	5,049		1,485
Total raw materials	146,363		150,222
Blended fluids systems components	39,542		38,088
Finished goods - mats	10,992		8,586
Total inventories	$	196,897	$	196,896