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Derivative Activities - Effects of Derivatives on Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Derivative [Line Items] |  |
Derivative Fair Value Income (Loss) | $ 165,557 | $ 86,908
Collars |  |
Derivative [Line Items] |  |
Derivative Fair Value Income (Loss) | 9,475 | 0
Puts |  |
Derivative [Line Items] |  |
Derivative Fair Value Income (Loss) | 6,707 | 0
Calls |  |
Derivative [Line Items] |  |
Derivative Fair Value Income (Loss) | 510 | 0
Basis Swaps |  |
Derivative [Line Items] |  |
Derivative Fair Value Income (Loss) | (17,972) | 7,275
Commodity | Swaps |  |
Derivative [Line Items] |  |
Derivative Fair Value Income (Loss) | 166,752 | 79,644
Freight | Swaps |  |
Derivative [Line Items] |  |
Derivative Fair Value Income (Loss) | $ 85 | $ (11)

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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=64837297&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=64837297&loc=SL5624171-113959 + Details
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