PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2017

PROPERTY AND EQUIPMENT

Schedule of property and equipment

	As of December 31,
	2017		2016
	(in thousands)
Land	$	15,286	$	8,593
Buildings and leasehold improvements		99,222		83,352
Vehicles and equipment		70,537		24,114
Vehicles and equipment - capital lease		2,810		—
Machinery and equipment		716,064		534,303
Machinery and equipment - capital lease		900		—
Computer equipment and software		12,822		11,102
Office furniture and equipment		4,320		4,275
Disposal wells		67,805		67,566
Helicopters		497		497
Construction in progress		44,732		5,584
		1,034,995		739,386
Less accumulated depreciation and impairment		(560,886)		(490,519)
Total property and equipment, net	$	474,109	$	248,867