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v3.21.1

Derivatives (Gross Current and Noncurrent Assets and Liabilities) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020
--- | --- | --- | ---
Derivatives, Fair Value [Line Items] |  |  |
Commodity derivative assets |  |  | $ 20,977
Commodity derivative liabilities | $ (76,388) | $ (157,301) |
Commodity derivative assets - current | 317,939 | 320,706 | 149,070
Commodity derivative liabilities - current | (91,448) | (146,990) | (90,491)
Commodity |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Commodity derivative assets | 385,332 | 328,261 | 177,730
Commodity derivative liabilities | (249,550) | (359,464) | (141,410)
Cash collateral paid | 95,533 | 208,670 |
Cash collateral paid |  |  | 22,855
Total | 231,315 | 177,467 | 59,175
Commodity | Commodity Derivative Assets - Current |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Commodity derivative assets | 357,802 | 304,533 | 164,700
Commodity derivative liabilities | (123,480) | (192,023) | (38,485)
Cash collateral paid | 83,617 | 208,196 |
Cash collateral paid |  |  | 22,855
Commodity derivative assets - current | 317,939 | 320,706 | 149,070
Commodity | Commodity Derivative Assets - Noncurrent |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Commodity derivative assets | 6,762 | 4,328 | 3,240
Commodity derivative liabilities | (925) | (348) | (119)
Cash collateral paid | 0 | 0 |
Cash collateral paid |  |  | 0
Commodity derivative assets - noncurrent | 5,837 | 3,980 | 3,121
Commodity | Commodity Derivative Liabilities - Current |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Commodity derivative assets | 20,752 | 19,386 | 9,648
Commodity derivative liabilities | (124,116) | (166,850) | (100,139)
Cash collateral paid | 11,916 | 474 |
Cash collateral paid |  |  | 0
Commodity derivative liabilities - current | (91,448) | (146,990) | (90,491)
Commodity | Commodity Derivative Liabilities - Noncurrent |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Commodity derivative assets | 16 | 14 | 142
Commodity derivative liabilities | (1,029) | (243) | (2,667)
Cash collateral paid | 0 | 0 |
Cash collateral paid |  |  | 0
Commodity derivative liabilities - noncurrent | $ (1,013) | $ (229) | $ (2,525)

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