Related Party Transactions - Summary of Reimbursements (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Related Party Transaction [Line Items]
General and administrative expenses	$ 4,467	$ 4,110
Western Pocahontas Properties and Quintana Minerals Corporation \| Affiliated Entity
Related Party Transaction [Line Items]
Operating and maintenance expenses	1,659	1,607
General and administrative expenses	$ 1,240	$ 1,186

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration