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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, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | $ (34,591) | $ (88,426) | $ (151,890) | $ 188,326
Swaptions |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | 7,093 | (7,602) | 4,100 | (7,602)
Collars |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (3,965) | 956 | (4,031) | 15,221
Puts |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | 0 | (73) | 0 | 9,646
Calls |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | 197 | 104 | 526 | 1,144
Basis Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (2,350) | 6,113 | (9,043) | (2,554)
Commodity | Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | (35,868) | (87,861) | (143,598) | 172,457
Freight | Commodity | Swaps |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative Fair Value (Loss) Income | $ 302 | $ (63) | $ 156 | $ 14

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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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