Acquisitions	6 Months Ended
Jun. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Acquisitions	AcquisitionsWilliston Basin Acquisition. On May 3, 2021, OPNA entered into a purchase and sale agreement (the “Williston Basin Acquisition PSA”) with QEP Energy Company, a wholly-owned subsidiary of Diamondback Energy, Inc., to acquire approximately 95,000 net acres in the Williston Basin (the “Williston Basin Acquisition”) in a cash transaction for aggregate consideration of $745.0 million, subject to customary purchase price adjustments. Upon execution of the purchase and sale agreement, the Company paid a deposit of $74.5 million, which is included in other assets in the Condensed Consolidated Balance Sheet at June 30, 2021. The Williston Basin Acquisition is expected to close late in the third quarter of 2021 with an effective date of April 1, 2021.

Acquisitions

6 Months Ended

Jun. 30, 2021

Business Combination and Asset Acquisition [Abstract]

AcquisitionsWilliston Basin Acquisition. On May 3, 2021, OPNA entered into a purchase and sale agreement (the “Williston Basin Acquisition PSA”) with QEP Energy Company, a wholly-owned subsidiary of Diamondback Energy, Inc., to acquire approximately 95,000 net acres in the Williston Basin (the “Williston Basin Acquisition”) in a cash transaction for aggregate consideration of $745.0 million, subject to customary purchase price adjustments. Upon execution of the purchase and sale agreement, the Company paid a deposit of $74.5 million, which is included in other assets in the Condensed Consolidated Balance Sheet at June 30, 2021. The Williston Basin Acquisition is expected to close late in the third quarter of 2021 with an effective date of April 1, 2021.