Business Segment Information - Financial Information with Respect to Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Operating revenues	$ 89,662	$ 189,847	$ 218,160	$ 387,049
Depreciation and amortization			27,619	56,489
Identifiable assets	406,844		406,844		$ 550,474
Continuing Operations
Segment Reporting Information [Line Items]
Operating revenues	89,637	147,975	218,040	301,165
Direct operating costs	(74,613)	(109,060)	(179,731)	(220,183)
Segment profits	15,024	38,915	38,309	80,982
Depreciation and amortization	12,853	17,296	27,619	33,478
Capital expenditures	1,821	14,346	6,319	32,569
Identifiable assets	398,099	575,415	398,099	575,415
Discontinued Operations
Segment Reporting Information [Line Items]
Operating revenues	25	41,872	120	85,884
Direct operating costs	(892)	(34,105)	(2,411)	(74,824)
Segment profits	(867)	7,767	(2,291)	11,060
Depreciation and amortization	0	11,695	0	23,011
Capital expenditures	0	3,915	0	9,726
Identifiable assets	8,745	126,420	8,745	126,420
Corporate and Other | Continuing Operations
Segment Reporting Information [Line Items]
Operating revenues	0	0	0	0
Direct operating costs	0	0	0	0
Segment profits	0	0	0	0
Depreciation and amortization	1,368	1,323	2,940	2,562
Capital expenditures	(23)	220	(3)	446
Identifiable assets	151,484	263,731	151,484	263,731
Well Servicing | Continuing Operations
Segment Reporting Information [Line Items]
Operating revenues	47,318	58,518	105,459	120,502
Direct operating costs	(39,385)	(46,162)	(90,202)	(94,970)
Well Servicing | Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Operating revenues	47,318	58,518	105,459	120,502
Direct operating costs	(39,385)	(46,162)	(90,202)	(94,970)
Segment profits	7,933	12,356	15,257	25,532
Depreciation and amortization	1,638	4,053	3,519	7,845
Capital expenditures	172	5,304	1,854	11,544
Identifiable assets	33,933	84,483	33,933	84,483
Water Logistics | Continuing Operations
Segment Reporting Information [Line Items]
Operating revenues	33,254	51,031	77,635	106,632
Direct operating costs	(25,582)	(35,529)	(58,701)	(72,828)
Water Logistics | Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Operating revenues	33,254	51,031	77,635	106,632
Direct operating costs	(25,582)	(35,529)	(58,701)	(72,828)
Segment profits	7,672	15,502	18,934	33,804
Depreciation and amortization	6,111	5,359	13,132	10,372
Capital expenditures	1,324	7,518	3,461	15,051
Identifiable assets	134,234	97,966	134,234	97,966
Completion & Remedial Services | Continuing Operations
Segment Reporting Information [Line Items]
Operating revenues	9,065	38,426	34,946	74,031
Direct operating costs	(9,646)	(27,369)	(30,828)	(52,385)
Completion & Remedial Services | Operating Segments | Continuing Operations
Segment Reporting Information [Line Items]
Operating revenues	9,065	38,426	34,946	74,031
Direct operating costs	(9,646)	(27,369)	(30,828)	(52,385)
Segment profits	(581)	11,057	4,118	21,646
Depreciation and amortization	3,736	6,561	8,028	12,699
Capital expenditures	348	1,304	1,007	5,528
Identifiable assets	$ 78,448	$ 129,235	$ 78,448	$ 129,235