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Quarterly report pursuant to Section 13 or 15(d)

Royalty Interests (Details)

v3.19.3
Royalty Interests (Details)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
a
$ / a
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Net Book Value Ìý Ìý Ìý
Royalty interests acquired $ 29,320 Ìý $ 24,303
Total royalty interests 29,320 Ìý $ 24,303
Acquisition of royalty interests $ 5,017 $ 0 Ìý
1/16th Nonparticipating Perpetual Royalty Interest Ìý Ìý Ìý
Real Estate Properties [Line Items] Ìý Ìý Ìý
Nonparticipating perpetual royalty interest rate 6.25% Ìý 6.25%
Net Book Value Ìý Ìý Ìý
1/16th nonparticipating perpetual royalty interest $ 0 Ìý $ 0
1/128th Nonparticipating Perpetual Royalty Interest Ìý Ìý Ìý
Real Estate Properties [Line Items] Ìý Ìý Ìý
Nonparticipating perpetual royalty interest rate 0.78125% Ìý 0.78125%
Net Book Value Ìý Ìý Ìý
1/128th nonparticipating perpetual royalty interest $ 0 Ìý $ 0
Additional real estate acquisitions Ìý Ìý Ìý
Net Book Value Ìý Ìý Ìý
Net royalty interests (acre) | a 1,247 Ìý Ìý
Acquisition of royalty interests $ 4,700 Ìý Ìý
Average price per net royalty acre acquired (in dollars per acre) | $ / a 3,800 Ìý Ìý