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SUBSEQUENT EVENTS	12 Months Ended
SUBSEQUENT EVENTS	Dec. 31, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Exercise of Option with EPIC Pipeline LP On February 1, 2019, Altus Midstream exercised the option with EPIC Pipeline LP to acquire a 15.0 percent equity interest in the EPIC crude oil pipeline (the “EPIC Pipeline”). The transaction is anticipated to close in the first quarter of 2019 for approximately $52 million. Upon completion, the long-haul crude oil pipeline will extend from the Orla area in northern Reeves County, Texas to the Port of Corpus Christi, Texas and is expected to have Permian Basin initial throughput capacity of approximately 590 MBbl/d. The project includes terminals in Orla, Pecos, Saragosa, Crane, Wink, Midland, Hobson and Gardendale, with Port of Corpus Christi connectivity and export access. It will service Delaware Basin, Midland Basin and Eagle Ford Shale production. The EPIC Pipeline will be operated by EPIC Consolidated Operations, LLC and is expected to be in service in the first quarter of 2020. Subsidiaries Legal Name Change Effective February 14, 2019, the entities comprising the Alpine High Entities changed their legal names such that references to “Alpine High” within each of the respective former legal names are superseded by “Altus Midstream.”