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Derivative Activities - Effects of Derivatives on Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative Fair Value (Loss) Income | $ 18,491 | $ 74,676 | $ 195,245 | $ (61,731) | $ 100,698 | $ (34,591) | $ (103,290) | $ (14,009) | $ 226,681 | $ (51,192) | $ 213,350
Swaptions |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative Fair Value (Loss) Income |  |  |  |  |  |  |  |  | 333 | (6,556) | 6,534
Collars |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative Fair Value (Loss) Income |  |  |  |  |  |  |  |  | (3,903) | 17,583 | 18,132
Basis Swaps |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative Fair Value (Loss) Income |  |  |  |  |  |  |  |  | 6,661 | (1,104) | (4,647)
Puts |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative Fair Value (Loss) Income |  |  |  |  |  |  |  |  | 0 | 0 | 10,929
Calls |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative Fair Value (Loss) Income |  |  |  |  |  |  |  |  | (349) | (2,653) | 987
Commodity | Swaps |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative Fair Value (Loss) Income |  |  |  |  |  |  |  |  | 219,968 | (57,950) | 181,095
Freight | Swaps |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative Fair Value (Loss) Income |  |  |  |  |  |  |  |  | $ 3,971 | $ (512) | $ 320

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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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