Segment Data Segment Data - Disaggregated Revenues, Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 236,262	$ 183,020	$ 463,555	$ 341,711
Operating segments | Mats and integrated services
Disaggregation of Revenue [Line Items]
Revenues	56,524	32,397	106,438	55,038
Operating segments | Mats and integrated services | Service revenues
Disaggregation of Revenue [Line Items]
Revenues	24,447	7,625	45,751	14,346
Operating segments | Mats and integrated services | Rental revenues
Disaggregation of Revenue [Line Items]
Revenues	20,938	17,722	39,750	30,362
Operating segments | Mats and integrated services | Product sales revenues
Disaggregation of Revenue [Line Items]
Revenues	$ 11,139	$ 7,050	$ 20,937	$ 10,330