Schedule of Financial Information for Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue from external customers	$ 53,819	$ 50,173	$ 161,175	$ 128,415
(Loss) income before income taxes	(16,907)	(178,781)	(53,985)	(236,258)
Depreciation and amortization	8,683	11,532	26,652	34,923
Oilfield and Industrial Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers	44,595	44,847	136,850	111,669
Operating Segment \| Oilfield and Industrial Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers	44,595	44,847	136,850	111,669
(Loss) income before income taxes	(17,904)	(178,603)	(56,217)	(235,803)
Depreciation and amortization	8,372	11,223	25,755	33,947
Operating Segment \| Environmental Technologies and Services
Segment Reporting Information [Line Items]
Revenue from external customers	9,224	5,326	24,325	16,746
(Loss) income before income taxes	997	(178)	2,232	(455)
Depreciation and amortization	$ 311	$ 309	$ 897	$ 976

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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