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v3.19.3.a.u2

Risk Management Activities (Details) | 12 Months Ended
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Dec. 31, 2019 USD ($) MMBTU $ / bbl $ / MMBTU MBbls bbl | Dec. 31, 2018 USD ($) $ / bbl | Dec. 31, 2017 USD ($)
Derivatives, Fair Value [Line Items] |  |  |  |
Assets from Price Risk Management Activities |  | $ 1,299,000 | $ 23,806,000 |
Liabilities from Price Risk Management Activities |  | $ 20,194,000 | $ 0 |
Receivable Major Customer Percentage |  | 10.00% | 10.00% |
Gains (Losses) on Mark-to-Market Commodity Derivative Contracts |  | $ 180,275,000 | $ (165,640,000) | $ 19,828,000
Net Cash Received from (Payments for) Settlements of Commodity Derivatives Contracts |  | 231,229,000 | (258,906,000) | 7,438,000
Derivative Collateral [Abstract] |  |  |  |
Collateral Held on Derivative |  | 0 |  | 0
Collateral Had on Derivaitve |  | 0 |  | 0
Assets [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Assets from Price Risk Management Activities |  | 3,000,000 |  |
Liabilities from Price Risk Management Activities |  | 2,000,000 |  |
Assets [Member] | Price Risk Derivative [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Assets from Price Risk Management Activities | [1] |  | 1,299,000 | 23,806,000
Liability [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Assets from Price Risk Management Activities |  | 3,000,000 |  |
Liabilities from Price Risk Management Activities |  | $ 23,000,000 |  |
Liabilities From Price Risk Management Activities [Member] | Price Risk Derivative [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Liabilities from Price Risk Management Activities | [2] |  | $ 20,194,000 | $ 0
Crude Oil [Member] | Midland Differential Basis Swap [Member] | Derivative Contracts - January through December (closed) [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Volume (Bbld) | MBbls |  | 20,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl |  |  | 1.075 |
Crude Oil [Member] | Gulf Coast Differential Basis Swap [Member] | Derivative Contracts - January through December (closed) [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Volume (Bbld) | bbl |  | 13,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl |  | 5.572 |  |
Crude Oil [Member] | Price Swap [Member] | Derivative Contracts - April (closed) [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Volume (Bbld) | bbl |  | 25,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl |  | 60.00 |  |
Crude Oil [Member] | Price Swap [Member] | Derivative Contracts - May through December (closed) [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Volume (Bbld) | bbl |  | 150,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl |  | 62.50 |  |
Crude Oil [Member] | Price Swap [Member] | Derivative Contracts - Year Two - January through March [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Volume (Bbld) | bbl |  | 200,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl |  | 59.33 |  |
Crude Oil [Member] | Price Swap [Member] | Derivative Contracts - Year Two - April through June [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Volume (Bbld) | bbl |  | 150,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl |  | 59.03 |  |
Crude Oil [Member] | Price Swap [Member] | Derivative Contracts - Year Two - July through September [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Volume (Bbld) | bbl |  | 50,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl |  | 58.32 |  |
Mont Belvieu Propane Price Swap [Member] | Price Swap [Member] | Derivative Contracts - Year Two - January through December [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Volume (Bbld) | bbl |  | 4,000 |  |
Derivative, Swap Type, Average Fixed Price | $ / bbl |  | 21.34 |  |
Natural Gas [Member] | Rockies Differential Basis Swaps [Member] | Derivative Contracts - Year Two - January through December [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / MMBTU |  | 0.55 |  |
Volume (MMBTU) | MMBTU |  | 30,000 |  |
Natural Gas [Member] | HSC Differential Basis Swaps [Member] | Derivative Contracts - Year Two - January through December [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / MMBTU |  | 0.05 |  |
Volume (MMBTU) | MMBTU |  | 60,000 |  |
Natural Gas [Member] | Waha Differential Basis Swaps [Member] | Derivative Contracts - Year Two - January through December [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / MMBTU |  | 1.40 |  |
Volume (MMBTU) | MMBTU |  | 50,000 |  |
Natural Gas [Member] | Price Swap [Member] | Derivative Contracts - Year Two - January through December [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Derivative, Swap Type, Average Fixed Price | $ / MMBTU |  | 2.90 |  |
Volume (MMBTU) | MMBTU |  | 250,000 |  |
[1] | The current portion of Assets from Price Risk Management Activities consists of gross assets of $3 million, partially offset by gross liabilities of $2 million, at December 31, 2019.
[2] | The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $23 million, partially offset by gross assets of $3 million at December 31, 2019.

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