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Acquisitions and Disposal of Assets (Details) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 10, 2021 USD ($) | Apr. 22, 2021 USD ($) | Feb. 05, 2021 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) MMBoe | Sep. 30, 2021 USD ($) MMBoe | Sep. 30, 2020 USD ($) MMBoe
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Proceeds from sale of assets |  |  |  |  |  | $ 38,086 | $ 37,243
Total revenues |  |  |  | $ 46,584 | $ 27,676 | 114,403 | 84,660
Lease operating expenses |  |  |  | 9,080 | $ 8,069 | $ 26,266 | $ 32,409
Production volume (MMBoe) | MMBoe |  |  |  |  | 2,000,000.0 | 5,100,000 | 6,800,000
Production, ad valorem, and other taxes |  |  |  | 2,219 | $ 2,333 | $ 6,929 | $ 7,386
Royalty Interest of SandRidge Mississippian Trust I |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Gross purchase price |  | $ 4,900 |  |  |  |  |
Net purchase price |  | $ 3,600 |  |  |  |  |
Royalty Interest of SandRidge Mississippian Trust I | SandRidge Energy, Inc |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Ownership interest in trust |  | 26.90% |  |  |  |  |
Royalty Interest of SandRidge Mississippian Trust II |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Gross purchase price | $ 5,300 |  |  |  |  |  |
Net purchase price | $ 3,300 |  |  |  |  |  |
Royalty Interest of SandRidge Mississippian Trust II | SandRidge Energy, Inc |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Ownership interest in trust | 37.60% |  |  |  |  |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | North Park Basin, Colorado |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Purchase price |  |  | $ 47,000 |  |  |  |
Proceeds from sale of assets |  |  | 39,700 |  |  |  |
Reduction of full cost pool assets |  |  | 22,000 |  |  |  |
Reduction in non-full cost pool assets |  |  | 4,600 |  |  |  |
Gain on sale |  |  | 19,700 |  |  | (18,900) |
Gain from release of revenues in suspense |  |  | 500 |  |  |  |
Gain from relief of asset retirement obligations |  |  | 6,100 |  |  |  |
Reduction in oil and gas properties related to NPB |  |  | $ 26,600 |  |  |  |
Decrease in sales price |  |  |  | $ 800 |  |  |
Total revenues |  |  |  |  | 7,100 | 3,200 | 24,500
Lease operating expenses |  |  |  |  | $ 1,300 | $ 900 | $ 7,100
Production volume (MMBoe) | MMBoe |  |  |  |  | 200,000 | 100,000 | 800,000
Production, ad valorem, and other taxes |  |  |  |  | $ 500 |  | $ 1,500
Disposal Group, Held-for-sale, Not Discontinued Operations | North Park Basin, Colorado | Revenue Benchmark | Revenue from Rights Concentration Risk |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Concentration risk, percent of total |  |  |  |  | 25.60% | 2.80% | 28.90%
Disposal Group, Held-for-sale, Not Discontinued Operations | North Park Basin, Colorado | Consolidated Lease Operating Expense | Revenue from Rights Concentration Risk |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Concentration risk, percent of total |  |  |  |  | 16.40% | 3.50% | 21.90%
Disposal Group, Held-for-sale, Not Discontinued Operations | North Park Basin, Colorado | Consolidated Production, Ad Valorem and Other Taxes | Revenue from Rights Concentration Risk |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Concentration risk, percent of total |  |  |  |  | 19.90% |  | 20.90%
Disposal Group, Held-for-sale, Not Discontinued Operations | North Park Basin, Colorado | Consolidated Production | Revenue from Rights Concentration Risk |  |  |  |  |  |  |
Assets and Liabilities Held for Sale [Line Items] |  |  |  |  |  |  |
Concentration risk, percent of total |  |  |  |  | 9.90% | 1.30% | 11.10%

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