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Derivative Instruments and Hedging Activities - Effect of Gain (Loss) on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Realized (losses) gains relating to |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | $ (4,597) | $ (5,153) | $ (31,941) | $ (12,200)
Unrealized gains (losses) relating to |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | 4,416 | 3,682 | 35,692 | (20,204)
Realized and unrealized gains (losses) on derivative instruments | (181) | (1,471) | 3,751 | (32,404)
Interest rate swap agreements |  |  |  |
Realized (losses) gains relating to |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | (4,238) | (5,349) | (13,509) | (11,905)
Unrealized gains (losses) relating to |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | 4,336 | 3,956 | 35,915 | (20,107)
Foreign currency forward contracts |  |  |  |
Realized (losses) gains relating to |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | 0 | 379 | 0 | 138
Unrealized gains (losses) relating to |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (56) | (53) | (56) | 202
Forward freight agreements |  |  |  |
Realized (losses) gains relating to |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | (359) | (183) | (420) | (433)
Unrealized gains (losses) relating to |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | $ 136 | $ (221) | $ (167) | $ (299)

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- Definition Derivative instruments not designated as hedging instruments realized gain (loss) net. + References No definition available. + Details
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- Definition Derivative instruments not designated as hedging instruments unrealized gain loss net. + References No definition available. + Details
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- Definition Realized losses gains. + References No definition available. + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 + Details
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