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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 | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Realized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | $ (17,097) | $ (24,619) | $ (32,832) | $ (60,935)
Unrealized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (13,473) | (64,653) | (4,213) | (135,958)
Total realized and unrealized gains (losses) on derivative instruments | (30,570) | (89,272) | (37,045) | (196,893)
Interest rate swap agreements |  |  |  |
Realized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | (15,914) | (22,409) | (32,470) | (45,589)
Unrealized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (15,517) | (62,817) | (6,394) | (143,871)
Interest rate swap agreement terminations |  |  |  |
Realized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | (1,005) | 0 | (610) | (8,140)
Foreign currency forward contracts |  |  |  |
Realized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | (618) | (2,336) | (971) | (7,332)
Unrealized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | 2,808 | 1,093 | 3,648 | 15,064
Time-charter swap agreement |  |  |  |
Realized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | 360 | 126 | 1,106 | 126
Unrealized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (402) | 1,345 | (875) | 1,345
Forward freight agreements |  |  |  |
Realized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments realized (loss) gain net | 80 | 0 | 113 | 0
Unrealized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (30) | 0 | (17) | 0
Stock purchase warrants |  |  |  |
Unrealized (losses) gains relating to: |  |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | $ (332) | $ (4,274) | $ (575) | $ (8,496)

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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/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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