Juniper Transaction (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended			6 Months Ended	9 Months Ended
	Jan. 15, 2021	Jan. 31, 2021	Jan. 15, 2021	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Apr. 01, 2021	Jan. 14, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Preferred stock, par value (in USD per share)	$ 0.01		$ 0.01
Common Unit, Issued	15,268,686		15,268,686
Proceeds from Contributed Capital	$ 150,000
Contribution Agreement - Common Units	17,142,857		17,142,857
Contribution Agreement - Preferred Shares	171,428.57		171,428.57
Asset Agreement - Common Units	5,405,252		5,405,252							5,406,141
Asset Agreement - Preferred Shares	54,052.52		54,052.52							54,061.41
Common Units Placed in Indemnity Escrow	495,900		495,900
Preferred Shares Placed in Indemnity Escrow	4,959		4,959
Cash Received Related to Revenues Attributable to Production from RCR	$ 1,160		$ 1,200
Suspense revenues attributable to RCR								$ (146)
Issue costs of noncontrolling interest securities paid	(3,758)							(3,758)	$ 0
Transaction costs of noncontrolling interest paid	(5,543)							(5,543)	0
Oil and Gas Property Contributed	38,561
Asset Retirement Obligations of Contributed Property	(14)
Capital contributions Fair Value	180,260
Shareholder's equity, noncontrolling interest	385,110		385,110	$ 426,590	$ 374,143	$ 347,732	$ 382,663	426,590	347,732		$ 205,558	$ 212,838	$ 590,539	$ 684,319	$ 520,745
Percentage of ownership after transaction							59.60%
Noncontrolling interest	229,620		$ 229,620	253,401				253,401				$ 0
Net income attributable to Noncontrolling interest				25,676		0		23,778	0
Other comprehensive income attributable to Noncontrolling interest				$ 1		$ 0		$ 4	$ 0
Juniper Transaction
Business Acquisition [Line Items]
Professional Fees And Other Costs							$ 19,000
Income Tax Adjustment	$ (708)
Juniper Transaction | Costs And Services Incurred In Current Period
Business Acquisition [Line Items]
Professional Fees And Other Costs		$ 14,000
Juniper Transaction | Contingent Transaction Costs To Be Paid Upon Closing
Business Acquisition [Line Items]
Professional Fees And Other Costs							5,500
Juniper Transaction | Costs Related to Issuance of Preferred Shares and Common Units
Business Acquisition [Line Items]
Professional Fees And Other Costs							3,800
Juniper Transaction | Costs And Services - G&A
Business Acquisition [Line Items]
Professional Fees And Other Costs					$ 5,000		$ 4,700