BUSINESS SEGMENT INFORMATION - Revenues by major service lines (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment information:
Total revenues	$ 377,833	$ 476,668
Operating Segments
Segment information:
Total revenues	377,833	476,668
Technical Services
Segment information:
Total revenues	356,394	451,991
Technical Services | Pressure Pumping
Segment information:
Total revenues	176,256	264,801
Technical Services | Downhole Tools
Segment information:
Total revenues	93,794	107,404
Technical Services | Coiled Tubing
Segment information:
Total revenues	33,168	40,066
Technical Services | Cementing
Segment information:
Total revenues	27,751	6,245
Technical Services | Nitrogen
Segment information:
Total revenues	9,550	12,097
Technical Services | Snubbing
Segment information:
Total revenues	4,856	7,091
Technical Services | All other
Segment information:
Total revenues	11,019	14,287
Technical Services | Operating Segments
Segment information:
Total revenues	356,394	451,991
Support Services
Segment information:
Total revenues	21,439	24,677
Support Services | Rental Tools
Segment information:
Total revenues	15,974	17,676
Support Services | All other
Segment information:
Total revenues	5,465	7,001
Support Services | Operating Segments
Segment information:
Total revenues	$ 21,439	$ 24,677