Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	$ 197,202	$ 234,665
Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	1,301	0
Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	195,901	234,665
Pumping equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	25,716	72,810
Well servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	51,383	48,536
Transport/vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	32,554	35,245
Coiled tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	12,438	19,980
RAFT
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	20,643	20,782
Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,626	6,013
Production and disposal facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,600	5,651
Hot oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,745	5,385
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	35,497	20,263
Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	98,746	98,923
Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	16,748	16,998
ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	55,055	71,225
Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	30,524	43,789
Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		3,875
West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,730	6,449
Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	(10,601)	(6,594)
Completion & Remedial Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	76,834	117,597
Completion & Remedial Services | Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Completion & Remedial Services | Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	76,834	117,597
Completion & Remedial Services | Pumping equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	25,716	72,810
Completion & Remedial Services | Well servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Completion & Remedial Services | Transport/vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Completion & Remedial Services | Coiled tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	12,438	19,980
Completion & Remedial Services | RAFT
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	20,643	20,782
Completion & Remedial Services | Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Completion & Remedial Services | Production and disposal facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Completion & Remedial Services | Hot oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Completion & Remedial Services | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	18,037	4,025
Completion & Remedial Services | Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	32,520	38,166
Completion & Remedial Services | Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	809
Completion & Remedial Services | ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	28,392	49,727
Completion & Remedial Services | Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	17,893	29,789
Completion & Remedial Services | Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		1,690
Completion & Remedial Services | West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Completion & Remedial Services | Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	(1,971)	(2,584)
Water Logistics
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	55,601	56,509
Water Logistics | Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Water Logistics | Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	55,601	56,509
Water Logistics | Pumping equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Water Logistics | Well servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Water Logistics | Transport/vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	32,554	35,245
Water Logistics | Coiled tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Water Logistics | RAFT
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Water Logistics | Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Water Logistics | Production and disposal facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,600	5,651
Water Logistics | Hot oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,745	5,385
Water Logistics | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	10,702	10,228
Water Logistics | Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	31,687	30,588
Water Logistics | Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	9,350	8,874
Water Logistics | ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	10,680	10,706
Water Logistics | Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,542	7,776
Water Logistics | Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0
Water Logistics | West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Water Logistics | Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	(2,658)	(1,435)
Well Servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	60,515	56,951
Well Servicing | Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Well Servicing | Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	60,515	56,951
Well Servicing | Pumping equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Well Servicing | Well servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	51,383	48,536
Well Servicing | Transport/vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Well Servicing | Coiled tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Well Servicing | RAFT
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Well Servicing | Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,626	6,013
Well Servicing | Production and disposal facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Well Servicing | Hot oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Well Servicing | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	2,506	2,402
Well Servicing | Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	31,506	27,013
Well Servicing | Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	7,398	7,315
Well Servicing | ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	9,491	8,642
Well Servicing | Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,089	6,224
Well Servicing | Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		2,185
Well Servicing | West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,730	6,449
Well Servicing | Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	(699)	(877)
Other Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	4,252	3,608
Other Services | Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	1,301	0
Other Services | Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	2,951	3,608
Other Services | Pumping equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Well servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Transport/vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Coiled tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | RAFT
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Production and disposal facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Hot oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	4,252	3,608
Other Services | Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	3,033	3,156
Other Services | Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,492	2,150
Other Services | Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		0
Other Services | West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0
Other Services | Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	$ (5,273)	$ (1,698)