Quarterly report [Sections 13 or 15(d)]

Oil and Gas Royalty Interests - Narrative (Details)

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Oil and Gas Royalty Interests - Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Real Estate Properties [Line Items]    
Acquisition of royalty interests $ 0 $ 3,546,000
Depletion expense 8,600,000 7,300,000
Additional real estate acquisitions    
Real Estate Properties [Line Items]    
Acquisition of royalty interests $ 0 $ 3,500,000