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Derivative Instruments and Hedging Activities - Effect of Gain (Loss) on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | $ (32,512) | $ (27,442) | $ (52,488)
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | 18,793 | 12,590 | 13,634
Total realized and unrealized losses on derivative instruments | (13,719) | (14,852) | (38,854)
Interest Rate Swap Agreements |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | (8,296) | (13,898) | (53,921)
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (7,878) | 33,700 | 17,005
Interest rate swap agreement terminations |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | 0 | (13,681) | (610)
Foreign currency forward contracts |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | (147) | 0 | 667
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (200) | 0 | 3,925
Stock Purchase Warrants |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | (25,559) | 0 | 0
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | 26,900 | (21,053) | (6,421)
Time-charter Swap Agreement |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | 0 | 0 | 1,106
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | 0 | 0 | (875)
Forward freight agreements |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | 1,490 | 137 | 270
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | $ (29) | $ (57) | $ 0

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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 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=109980867&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=109980867&loc=SL5624171-113959 + Details
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