Segment Data - Disaggregated Revenues, Geographic (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 227,293	$ 158,691
Operating segments | Fluids systems
Disaggregation of Revenue [Line Items]
Revenues	177,379	136,050
Operating segments | Fluids systems | Western Hemisphere
Disaggregation of Revenue [Line Items]
Revenues	123,455	94,335
Operating segments | Fluids systems | North America
Disaggregation of Revenue [Line Items]
Revenues	115,541	85,275
Operating segments | Fluids systems | United States
Disaggregation of Revenue [Line Items]
Revenues	92,469	65,620
Operating segments | Fluids systems | Canada
Disaggregation of Revenue [Line Items]
Revenues	23,072	19,655
Operating segments | Fluids systems | Latin America
Disaggregation of Revenue [Line Items]
Revenues	7,914	9,060
Operating segments | Fluids systems | Eastern Hemisphere
Disaggregation of Revenue [Line Items]
Revenues	53,924	41,715
Operating segments | Fluids systems | EMEA
Disaggregation of Revenue [Line Items]
Revenues	51,435	40,508
Operating segments | Fluids systems | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	$ 2,489	$ 1,207