Acquisitions and Divestitures - Divestiture (Details) $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended
	Mar. 30, 2019 USD ($) Boe	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($) location well	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2020 a
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on divestiture		$ (1,254)	$ (155)		$ (1,254)	$ (33,046)
Pirate Divestiture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture	$ 11,500
Net undeveloped acres (in acres) | a							3,400
Producing wells | well				6
Proved undeveloped locations | location				7
Production per day (in barrels of oil equivalent) | Boe	200
Gain (loss) on divestiture				$ (33,500)