Quarterly report pursuant to Section 13 or 15(d)

Royalty Interests (Details)

v3.20.2
Royalty Interests (Details)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
a
$ / a
Sep. 30, 2019
USD ($)
a
$ / a
Dec. 31, 2019
USD ($)
Net Book Value      
Royalty interests acquired, net of accumulated depletion of $582 and $260 as of September 30, 2020 and December 31, 2019, respectively $ 46,265   $ 29,320
Total royalty interests, gross 46,265   29,320
Less: accumulated depletion (582)   (260)
Total royalty interests, net 45,683   $ 29,060
Acquisition of royalty interests $ 16,945 $ 5,017  
Royalty interest rate 12.50% 12.50%  
1/16th nonparticipating perpetual royalty interests      
Real Estate Properties [Line Items]      
Nonparticipating perpetual royalty interest rate 6.25%   6.25%
Net Book Value      
1/16th nonparticipating perpetual royalty interest $ 0   $ 0
1/128th nonparticipating perpetual royalty interests      
Real Estate Properties [Line Items]      
Nonparticipating perpetual royalty interest rate 0.78125%   0.78125%
Net Book Value      
1/128th nonparticipating perpetual royalty interest $ 0   $ 0
Additional real estate acquisitions      
Net Book Value      
Net royalty interests (acre) | a 1,017 1,247  
Acquisition of royalty interests $ 16,900 $ 4,700  
Average price per net royalty acre acquired (in dollars per acre) | $ / a 16,668 3,800