Asset Acquisitions (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($) a	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) a
Asset Acquisitions [Abstract]
Net acres acquired \| a	380		1,030
Payments to acquire oil and gas property and equipment \| $	$ 7,873	$ 2,581	$ 33,255

The cash outflow to purchase long lived physical asset for use in the normal oil and gas operations and to purchase mineral interests in oil and gas properties not intended for resale.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireOilAndGasPropertyAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration