BUSINESS SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment information:
Total revenues	$ 284,624	$ 182,610
Technical Services
Segment information:
Total revenues	266,349	172,641
Technical Services | Pressure Pumping
Segment information:
Total revenues	119,898	74,900
Technical Services | Downhole Tools
Segment information:
Total revenues	81,070	56,377
Technical Services | Coiled Tubing
Segment information:
Total revenues	26,850	14,768
Technical Services | Nitrogen
Segment information:
Total revenues	7,603	11,160
Technical Services | Snubbing
Segment information:
Total revenues	6,212	3,832
Technical Services | All other
Segment information:
Total revenues	24,716	11,604
Support Services
Segment information:
Total revenues	18,275	9,969
Support Services | Rental Tools
Segment information:
Total revenues	13,063	6,032
Support Services | All other
Segment information:
Total revenues	$ 5,212	$ 3,937