Business Segment and Entity wide Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment information:
Total revenues	$ 1,222,409	$ 1,721,005	$ 1,595,227
Technical Services
Segment information:
Total revenues	1,145,554	1,647,213	1,538,351
Technical Services | Pressure Pumping
Segment information:
Total revenues	519,543	945,919	993,538
Technical Services | Downhole Tools
Segment information:
Total revenues	414,352	423,811	294,606
Technical Services | Coiled Tubing
Segment information:
Total revenues	80,758	100,049	109,462
Technical Services | Nitrogen
Segment information:
Total revenues	45,658	49,198	38,961
Technical Services | Snubbing
Segment information:
Total revenues	14,520	17,818	23,838
Technical Services | All other
Segment information:
Total revenues	70,723	110,418	77,946
Support Services
Segment information:
Total revenues	76,855	73,792	56,876
Support Services | Rental Tools
Segment information:
Total revenues	51,792	50,809	30,264
Support Services | All other
Segment information:
Total revenues	$ 25,063	$ 22,983	$ 26,612