PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property and equipment
Property and equipment	$ 1,015,379	$ 1,114,378
Accumulated depreciation	(562,986)	(611,530)
Property and equipment held-for-sale, net	885
Total property and equipment, net	453,278	502,848
Accumulated depreciation related to finance leases	1,600	1,300
depreciation and amortization expense
Depreciation expense from property and equipment	107,738	119,114	$ 92,402
Amortization expense from finance lease	916	1,314	168
Amortization expense from intangible assets	11,900	13,102	10,701
Accretion expense from asset retirement obligations	115	183	178
Total depreciation and amortization	120,669	133,713	103,449
Property and Equipment Held-for-Sale and Impairments
Impairment of property and equipment	3,715	6,657
Net loss on divestitures and sales of property and equipment held-for-sale	(7,950)	3,803	$ 2,726
Canadian Business
Property and Equipment Held-for-Sale and Impairments
Impairment of property and equipment	900
Net loss on divestitures and sales of property and equipment held-for-sale	3,900
Canadian Assets
Property and Equipment Held-for-Sale and Impairments
Impairment of property and equipment	900	4,400
Fluid Disposal Equipment
Property and Equipment Held-for-Sale and Impairments
Impaired Assets to be Disposed of by Method Other than Sale, Carrying Value of Asset	2,300	2,300
Property and equipment	0	0
Land
Property and equipment
Property and equipment	16,030	17,799
Buildings and leasehold improvements
Property and equipment
Property and equipment	97,426	106,626
Vehicles and equipment
Property and equipment
Property and equipment	53,819	83,435
Vehicles and equipment - finance lease
Property and equipment
Property and equipment	1,291	1,833
Machinery and equipment
Property and equipment
Property and equipment	729,162	758,528
Machinery and equipment - finance lease
Property and equipment
Property and equipment	162	532
Computer equipment and software
Property and equipment
Property and equipment	8,051	15,775
Computer equipment and software - finance lease
Property and equipment
Property and equipment	356	356
Office furniture and equipment
Property and equipment
Property and equipment	1,157	4,612
Disposal wells
Property and equipment
Property and equipment	64,149	64,038
Other
Property and equipment
Property and equipment	497	497
Construction in progress
Property and equipment
Property and equipment	$ 43,279	$ 60,347