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Derivative Activities - Effects of Derivatives on Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Derivative [Line Items] |  |  |  |
Derivative Fair Value Income (Loss) | $ 74,676 | $ (34,591) | $ 208,190 | $ (151,890)
Swaptions |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value Income (Loss) | 10,358 | 7,093 | 39,451 | 4,100
Collars |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value Income (Loss) | 356 | (3,965) | (3,590) | (4,031)
Calls |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value Income (Loss) | (224) | 197 | (224) | 526
Basis Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value Income (Loss) | 3,448 | (2,350) | 7,801 | (9,043)
Commodity | Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value Income (Loss) | 60,090 | (35,868) | 161,799 | (143,598)
Freight | Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value Income (Loss) | $ 648 | $ 302 | $ 2,953 | $ 156

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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=109980867&loc=SL5618551-113959 + Details
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