Properties And Equipment - Summary of Property Acquisitions (Details) $ in Millions		3 Months Ended
		Mar. 31, 2022 USD ($) a	Dec. 31, 2021 USD ($) a shares	Dec. 31, 2020 USD ($) a shares
SCOOP / OK [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	58	172	297
Cash		$ 0.5	$ 1.4	$ 2.0
Number of shares | shares	[3]			153,375
Total Purchase Price	[2]	$ 0.5	$ 1.4	$ 2.3
Haynesville /LA [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	500	426
Cash		$ 6.4	$ 5.8
Total Purchase Price	[2]	$ 6.4	$ 5.8
Haynesville / TX [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	68	103	142
Cash		$ 0.7	$ 0.6	$ 1.0
Total Purchase Price	[2]	$ 0.7	$ 0.6	$ 1.0
SCOOP / OK [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]	166	220
Cash		$ 1.3	$ 1.2
Total Purchase Price	[2]	$ 1.3	$ 1.2
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 /LA [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]		847
Cash			$ 0.6
Number of shares | shares	[3]		1,519,481
Total Purchase Price	[2]		$ 4.1
Haynesville /LA [Member]
Property Plant And Equipment [Line Items]
Net royalty acres | a	[1],[2]		116
Cash			$ 1.7
Total Purchase Price	[2]		$ 1.7
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.