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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, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | $ (103,290) | $ 111,195 | $ (117,299) | $ 276,752
Swaptions |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (6,592) |  | (2,993) |
Collars |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | 11 | 4,790 | (66) | 14,265
Puts |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income |  | 3,012 |  | 9,719
Calls |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | 152 | 529 | 329 | 1,040
Basis Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (5,828) | 9,304 | (6,693) | (8,668)
Commodity | Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (91,195) | 93,567 | (107,730) | 260,319
Freight | Commodity | Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | $ 162 | $ (7) | $ (146) | $ 77

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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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