Segment Data - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, Major Customer [Line Items]
Revenues	$ 164,550	$ 211,473
Operating income (loss)	(5,886)	5,679
Fluids systems
Revenue, Major Customer [Line Items]
Revenues	132,805	160,653
Mats and integrated services
Revenue, Major Customer [Line Items]
Revenues	31,745	50,820
Operating segments | Fluids systems
Revenue, Major Customer [Line Items]
Operating income (loss)	(2,268)	3,874
Operating segments | Mats and integrated services
Revenue, Major Customer [Line Items]
Operating income (loss)	3,062	13,538
Corporate office
Revenue, Major Customer [Line Items]
Operating income (loss)	$ (6,680)	$ (11,733)