REVENUES - Disaggregation of revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of revenue:
Total revenues	$ 284,624	$ 182,610
Oilfield services transferred at a point in time
Disaggregation of revenue:
Total revenues	0	0
Oilfield services transferred over time
Disaggregation of revenue:
Total revenues	$ 284,624	$ 182,610