INVENTORIES AND SUPPLIES (Tables)

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories and supplies consisted of the following (in thousands):

	June 30, 2018		December 31, 2017
Oil and oil products	$	68,125	$	58,142
Supplies and drums	100,118		94,242
Solvent and solutions	9,230		9,167
Modular camp accommodations	2,494		1,826
Other	13,577		12,635
Total inventories and supplies	$	193,544	$	176,012