Properties And Equipment - Summary of Property Acquisitions (Details) $ in Millions		3 Months Ended
		Jun. 30, 2022 USD ($) a	Mar. 31, 2022 USD ($) a	Dec. 31, 2021 USD ($) a shares	Jun. 30, 2021 USD ($) a shares	Dec. 31, 2020 USD ($) a shares
SCOOP / OK [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	60	58	172		297
Cash		$ 0.6	$ 0.5	$ 1.4		$ 2.0
Number of shares | shares	[3]					153,375
Total Purchase Price	[2]	$ 0.6	$ 0.5	$ 1.4		$ 2.3
Haynesville /LA [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	46	500	426	262
Cash		$ 0.8	$ 6.4	$ 5.8	$ 1.3
Total Purchase Price	[2]	$ 0.8	$ 6.4	$ 5.8	$ 1.3
Haynesville /LA [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	56		847
Cash		$ 0.4		$ 0.6
Number of shares | shares	[3]			1,519,481
Total Purchase Price	[2]	$ 0.4		$ 4.1
SCOOP / OK [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	88	166	220	2,514
Cash		$ 0.9	$ 1.3	$ 1.2	$ 9.5
Number of shares | shares	[3]				1,200,000
Total Purchase Price	[2]	$ 0.9	$ 1.3	$ 1.2	$ 13.0
Haynesville / LA, TX [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	503
Cash		$ 5.0
Total Purchase Price	[2]	$ 5.0
Haynesville /LA [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	92		116
Cash		$ 0.6		$ 1.7
Total Purchase Price	[2]	$ 0.6		$ 1.7
Haynesville /LA [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	25
Cash		$ 0.3
Total Purchase Price	[2]	$ 0.3
SCOOP / OK [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	68
Cash		$ 0.5
Total Purchase Price	[2]	$ 0.5
Haynesville / TX [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]		68	103	131	142
Cash			$ 0.7	$ 0.6	$ 1.0	$ 1.0
Total Purchase Price	[2]		$ 0.7	$ 0.6	$ 1.0	$ 1.0
Haynesville / TX [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]		33			184
Cash			$ 0.4			$ 0.8
Total Purchase Price	[2]		$ 0.4			$ 0.8
Haynesville / TX [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]					386
Cash						$ 3.5
Total Purchase Price	[2]					$ 3.5

[1] An estimated net royalty equivalent was used for the minerals included in the net royalty acres.

[2] Excludes subsequent closing adjustments and insignificant acquisitions.

[3] The Company’s policy is to classify all costs associated with equity issuances as financial costs in the Statements of Cash Flows.