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ACQUISITIONS AND DIVESTITURES - West Quito Draw Properties (Details) - USD ($)
$ in Millions
Feb. 06, 2018
Sep. 30, 2019
Aug. 02, 2019
Dec. 31, 2018
Feb. 16, 2017
West Quito Draw Properties          
ACQUISITIONS AND DIVESTITURES          
Purchase price $ 198.5        
6.75% senior notes due 2025          
ACQUISITIONS AND DIVESTITURES          
Interest rate (as a percent)   6.75% 6.75% 6.75% 6.75%