Business Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenue, Net	$ 1,595,227	$ 728,974	$ 1,263,840
Operating Segments | Technical Services
Segment Reporting Information [Line Items]
Revenue, Net	1,538,351	679,654	1,175,293
Operating Segments | Technical Services | Pressure Pumping
Segment Reporting Information [Line Items]
Revenue, Net	993,538	336,550	676,415
Operating Segments | Technical Services | Downhole Tools
Segment Reporting Information [Line Items]
Revenue, Net	294,606	169,754	229,902
Operating Segments | Technical Services | Coiled Tubing
Segment Reporting Information [Line Items]
Revenue, Net	109,462	70,511	112,923
Operating Segments | Technical Services | Nitrogen
Segment Reporting Information [Line Items]
Revenue, Net	38,961	37,172	53,488
Operating Segments | Technical Services | Snubbing
Segment Reporting Information [Line Items]
Revenue, Net	23,838	18,903	38,912
Operating Segments | Technical Services | All Other Technical Services
Segment Reporting Information [Line Items]
Revenue, Net	77,946	46,764	63,653
Operating Segments | Support Services
Segment Reporting Information [Line Items]
Revenue, Net	56,876	49,320	88,547
Operating Segments | Support Services | Rental Tools
Segment Reporting Information [Line Items]
Revenue, Net	30,264	21,443	45,126
Operating Segments | Support Services | All Other Support Services
Segment Reporting Information [Line Items]
Revenue, Net	$ 26,612	$ 27,877	$ 43,421