Inventories (Tables)

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following:

(In thousands)	September 30, 2017		December 31, 2016
Raw materials:
Drilling fluids	$	131,307	$	115,399
Mats	1,385		1,137
Total raw materials	132,692		116,536
Blended drilling fluids components	25,635		23,762
Finished goods - mats	6,057		3,314
Total inventory	$	164,384	$	143,612