Revenues - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	$ 189,847	$ 253,369	$ 387,049	$ 488,034
Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	1,991	1,301	1,991
Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	189,847	251,378	385,748	486,043
Frac Equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	23,300	64,399	49,016	116,521
Rental Tool Revenue
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	19,812	21,860	40,455	42,642
Coiled Tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	16,189	15,179	28,627	35,159
Snubbing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	1,045	2,286	2,103	7,440
Well Servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	49,201	54,132	100,584	102,668
Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,453	6,521	13,079	12,534
Transport/Vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	30,910	36,799	63,464	72,043
Hot Oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,118	5,003	11,863	10,388
Production and Disposal Facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,088	6,045	10,688	11,695
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	32,731	41,145	67,170	76,944
Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	91,223	116,496	189,969	222,096
Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	16,867	16,188	33,615	33,186
ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	53,415	76,389	108,470	143,393
Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	32,235	38,769	62,759	80,100
Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	3,553		7,428
West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,127	7,730	11,857	14,179
Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	(9,020)	(5,756)	(19,621)	(12,348)
Completion & Remedial Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	78,061	126,948	154,895	244,545
Completion & Remedial Services | Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Completion & Remedial Services | Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	78,061	126,948	154,895	244,545
Completion & Remedial Services | Frac Equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	23,300	64,399	49,016	116,521
Completion & Remedial Services | Rental Tool Revenue
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	19,812	21,860	40,455	42,642
Completion & Remedial Services | Coiled Tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	16,189	15,179	28,627	35,159
Completion & Remedial Services | Snubbing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	1,045	2,286	2,103	7,440
Completion & Remedial Services | Well Servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Completion & Remedial Services | Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Completion & Remedial Services | Transport/Vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Completion & Remedial Services | Hot Oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Completion & Remedial Services | Production and Disposal Facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Completion & Remedial Services | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	17,715	23,224	34,694	42,783
Completion & Remedial Services | Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	31,125	51,599	63,645	96,442
Completion & Remedial Services | Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	236	0	1,045
Completion & Remedial Services | ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	28,338	52,050	56,730	97,558
Completion & Remedial Services | Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	20,581	23,025	38,474	50,356
Completion & Remedial Services | Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	1,267		2,957
Completion & Remedial Services | West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Completion & Remedial Services | Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	(1,983)	(1,229)	(3,954)	(3,813)
Well Servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	58,168	63,268	118,683	120,219
Well Servicing | Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Well Servicing | Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	58,168	63,268	118,683	120,219
Well Servicing | Frac Equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Well Servicing | Rental Tool Revenue
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Well Servicing | Coiled Tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Well Servicing | Snubbing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Well Servicing | Well Servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	49,201	54,132	100,584	102,668
Well Servicing | Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,453	6,521	13,079	12,534
Well Servicing | Transport/Vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Well Servicing | Hot Oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Well Servicing | Production and Disposal Facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Well Servicing | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	2,514	2,615	5,020	5,017
Well Servicing | Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	30,435	30,366	61,941	57,378
Well Servicing | Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	7,633	7,338	15,031	14,653
Well Servicing | ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	9,661	9,241	19,152	17,884
Well Servicing | Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	6,126	6,911	12,215	13,135
Well Servicing | Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues		2,286		4,471
Well Servicing | West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,127	7,730	11,857	14,179
Well Servicing | Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	(814)	(604)	(1,513)	(1,481)
Water Logistics
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	51,031	59,679	106,632	116,188
Water Logistics | Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Water Logistics | Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	51,031	59,679	106,632	116,188
Water Logistics | Frac Equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Water Logistics | Rental Tool Revenue
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Water Logistics | Coiled Tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Water Logistics | Snubbing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Water Logistics | Well Servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Water Logistics | Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Water Logistics | Transport/Vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	30,910	36,799	63,464	72,043
Water Logistics | Hot Oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,118	5,003	11,863	10,388
Water Logistics | Production and Disposal Facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,088	6,045	10,688	11,695
Water Logistics | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	9,915	11,832	20,617	22,062
Water Logistics | Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	27,205	32,066	58,892	62,654
Water Logistics | Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	9,234	8,614	18,584	17,488
Water Logistics | ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	11,708	11,616	22,388	22,322
Water Logistics | Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	5,528	8,833	12,070	16,609
Water Logistics | Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0		0
Water Logistics | West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Water Logistics | Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	(2,644)	(1,450)	(5,302)	(2,885)
Other Services
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	2,587	3,474	6,839	7,082
Other Services | Products transferred at a point in time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	1,991	1,301	1,991
Other Services | Products and services transferred over time
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	2,587	1,483	5,538	5,091
Other Services | Frac Equipment
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Rental Tool Revenue
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Coiled Tubing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Snubbing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Well Servicing
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Plugging
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Transport/Vacuum
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Hot Oiler
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Production and Disposal Facilities
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	2,587	3,474	6,839	7,082
Other Services | Permian Basin | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	2,458	2,465	5,491	5,622
Other Services | Texas Gulf Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | ArkLaTex & Mid-Continent | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	3,708	3,482	10,200	5,629
Other Services | Rocky Mountain | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Eastern USA | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0		0
Other Services | West Coast | Reportable Geographical Components
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	0	0	0	0
Other Services | Corporate (Intercompany) | Geography Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Total revenues	$ (3,579)	$ (2,473)	$ (8,852)	$ (4,169)