Annual report pursuant to Section 13 and 15(d)

Organization and Description of Business Segments (Details)

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Organization and Description of Business Segments (Details)
a in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2023
a
segment
Dec. 31, 2022
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)   868  
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  
West Texas | Net Royalty Acres      
Organization, Consolidation and Presentation of Financial Statements [Line Items]      
Area of land (in acres)   195