Quarterly report pursuant to Section 13 or 15(d)

Organization and Description of Business Segments (Details)

v3.22.2
Organization and Description of Business Segments (Details)
a in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
a
segment
Jun. 30, 2021
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Number of operating segments | segment 2    
1/16th nonparticipating perpetual royalty interest      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Nonparticipating perpetual royalty interest rate (in percentage) 6.25% 6.25% 6.25%
1/128th nonparticipating perpetual royalty interest      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Nonparticipating perpetual royalty interest rate (in percentage) 0.78125%   0.78125%
1/8th Net royalty acres      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Nonparticipating perpetual royalty interest rate (in percentage) 12.50%    
West Texas      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Area of land (in acres) 880    
West Texas | 1/128th Nonparticipating perpetual oil and gas royalty interest      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Area of land (in acres) 85    
West Texas | 1/16th Nonparticipating perpetual oil and gas royalty interest      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Area of land (in acres) 371    
West Texas | 1/8th Net royalty acres      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Area of land (in acres) 4