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SUBSEQUENT EVENTS	3 Months Ended
SUBSEQUENT EVENTS	Mar. 31, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS On May 1, 2018, Stone completed the acquisition of a 100% working interest in the Ram Powell Unit, including six lease blocks in the Viosca Knoll Area, the Ram Powell tension leg platform (“TLP”), and related assets, from Shell Offshore Inc., Exxon Mobil Corporation, and Anadarko US Offshore LLC, for a purchase price of $34 million, with an effective date of October 1, 2017, and the posting of decommissioning surety bonds of $200 million. After considering the effects of customary purchase price adjustments from the effective date of the acquisition through closing, Stone received net cash of $29.4 million at closing.