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Derivatives (Derivatives Not Designated as Hedging Instruments - Commodity Contracts) (Details) MMBTU in Thousands, Boe in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) MMBTU Boe | Dec. 31, 2020 USD ($) Boe MMBTU
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 484,184 | $ 602,754
Derivative liabilities - Fair Value | $ 390,171 | $ 424,828
Customer Counterparty | Crude Oil |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 7,519 | 6,321
Customer Counterparty | Natural Gas |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 83,274 | 109,635
Derivative instruments not designated as hedging instruments |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 484,184 | $ 602,754
Derivative liabilities - Fair Value | 389,889 | 422,729
Derivative instruments not designated as hedging instruments | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 222,709 | 82,451
Derivative liabilities - Fair Value | 194,567 | 84,165
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 165,246 | 44,762
Derivative liabilities - Fair Value | $ 4,399 | $ 43,978
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Crude Oil | Written options |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 0 |
Derivative assets - Fair value | $ 87 |
Derivative liabilities - Fair Value | $ 0 |
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Crude Oil | Collars |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 2,837 | 2,022
Derivative assets - Fair value | $ 33,826 | $ 2,344
Derivative liabilities - Fair Value | $ 106 | $ 2,193
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Crude Oil | Swaps |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 4,682 | 4,299
Derivative assets - Fair value | $ 71,242 | $ 9,282
Derivative liabilities - Fair Value | $ 60 | $ 14,283
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Crude Oil | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 7,519 | 6,321
Derivative assets - Fair value | $ 105,155 | $ 11,626
Derivative liabilities - Fair Value | $ 166 | $ 16,476
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Natural Gas | Written options |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU |  | 597
Derivative assets - Fair value |  | $ 0
Derivative liabilities - Fair Value |  | $ 59
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Natural Gas | Collars |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 24,315 | 12,733
Derivative assets - Fair value | $ 10,903 | $ 1,063
Derivative liabilities - Fair Value | $ 458 | $ 205
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Natural Gas | Swaps |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 58,959 | 96,305
Derivative assets - Fair value | $ 49,188 | $ 32,073
Derivative liabilities - Fair Value | $ 3,775 | $ 27,238
Commodity contracts | Derivative instruments not designated as hedging instruments | Customer Counterparty | Natural Gas | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 83,274 | 109,635
Derivative assets - Fair value | $ 60,091 | $ 33,136
Derivative liabilities - Fair Value | 4,233 | 27,502
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative assets - Fair value | 57,463 | 37,689
Derivative liabilities - Fair Value | $ 190,168 | $ 40,187
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Crude Oil | Purchased options |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 0 |
Derivative assets - Fair value | $ 0 |
Derivative liabilities - Fair Value | $ 81 |
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Crude Oil | Collars |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 2,888 | 2,022
Derivative assets - Fair value | $ 0 | $ 2,217
Derivative liabilities - Fair Value | $ 33,399 | $ 2,402
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Crude Oil | Swaps |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 7,517 | 4,299
Derivative assets - Fair value | $ 27,524 | $ 8,220
Derivative liabilities - Fair Value | $ 82,723 | $ 7,135
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Crude Oil | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | Boe | 10,405 | 6,321
Derivative assets - Fair value | $ 27,524 | $ 10,437
Derivative liabilities - Fair Value | $ 116,203 | $ 9,537
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Natural Gas | Purchased options |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU |  | 597
Derivative assets - Fair value |  | $ 59
Derivative liabilities - Fair Value |  | $ 0
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Natural Gas | Collars |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 25,929 | 16,293
Derivative assets - Fair value | $ 1,136 | $ 205
Derivative liabilities - Fair Value | $ 10,936 | $ 813
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Natural Gas | Swaps |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 109,567 | 103,973
Derivative assets - Fair value | $ 28,803 | $ 26,988
Derivative liabilities - Fair Value | $ 63,029 | $ 29,837
Commodity contracts | Derivative instruments not designated as hedging instruments | Financial Counterparty | Natural Gas | Commodity contracts |  |
Derivative [Line Items] |  |
Derivative, nonmonetary notional amount, energy measure | MMBTU | 135,496 | 120,863
Derivative assets - Fair value | $ 29,939 | $ 27,252
Derivative liabilities - Fair Value | $ 73,965 | $ 30,650

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