Inventories (Tables)

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following:

(In thousands)	June 30, 2017		December 31, 2016
Raw materials:
Drilling fluids	$	123,162	$	115,399
Mats	1,092		1,137
Total raw materials	124,254		116,536
Blended drilling fluids components	28,709		23,762
Finished goods - mats	3,984		3,314
Total inventory	$	156,947	$	143,612