Segment Data - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue, Major Customer [Line Items]
Revenues	$ 227,293	$ 158,691
Operating Income (Loss)	13,838	3,746
Operating segments | Fluids systems
Revenue, Major Customer [Line Items]
Revenues	177,379	136,050
Operating Income (Loss)	10,477	6,352
Operating segments | Mats and integrated services
Revenue, Major Customer [Line Items]
Revenues	49,914	22,641
Operating Income (Loss)	12,086	6,402
Corporate, non-segment | Corporate office
Revenue, Major Customer [Line Items]
Operating Income (Loss)	$ (8,725)	$ (9,008)