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Derivative Activities - Effects of Derivatives on Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | $ (249,683) | $ (6,303) | $ (307,562) | $ 226,872
Contingent Consideration |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | 17,460 | 0 | 21,390 | 0
Swaptions |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (19,268) | (2,019) | (16,612) | (1,353)
Three Way Collars |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (53,705) | (6,200) | (52,832) | (17,562)
Collars |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (38,934) | 2,557 | (52,222) | 2,557
Calls |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | 0 | (33) | (775) | 242
Basis Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | 17,368 | (5,180) | 19,523 | 16,163
Commodity | Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (172,566) | 5,484 | (225,330) | 233,838
Freight | Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | $ (38) | $ (912) | $ (704) | $ (7,013)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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