REVENUE RECOGNITION - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	[1]	$ 257,249	$ 148,103
Gathering and processing services
Disaggregation of Revenue [Line Items]
Revenue from contract with customer		80,445	67,662
Natural gas, NGLs and condensate sales
Disaggregation of Revenue [Line Items]
Revenue from contract with customer		174,928	79,993
Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	[1]	$ 1,876	$ 448

[1] The results of the legacy ALTM business are not included in the Company’s consolidated financials prior to February 22, 2022. Refer to the Form 10-Q basis of presentation in Note 1—Description of the Organization and Summary of Significant Accounting Policies, for further information on the Company’s basis of presentation.