Oil and Gas Royalty Interests - Royalty Interests (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025 USD ($) a	Dec. 31, 2024 USD ($) a
Oil and gas royalty interests:
Royalty interests acquired, at cost	$ 446,739	$ 447,071
Total royalty interests	446,739	447,071
Less: accumulated depletion	(30,691)	(14,670)
Royalty interests, net	$ 416,048	$ 432,401
Gross royalty interests (in acres) \| a	5,308	5,308
1/16th nonparticipating perpetual royalty interest
Oil and gas royalty interests:
1/16th nonparticipating perpetual royalty interests	$ 0	$ 0
Nonparticipating perpetual royalty interest rate (in percentage)	6.25%	6.25%
Gross royalty interests (in acres) \| a	185,369	185,369
1/128th nonparticipating perpetual royalty interest
Oil and gas royalty interests:
1/128th nonparticipating perpetual royalty interests	$ 0	$ 0
Nonparticipating perpetual royalty interest rate (in percentage)	0.78125%	0.78125%
Royalty interests in acres
Oil and gas royalty interests:
Net royalty interest acquired (in acres) \| a	16,074	15,897