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Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Voyage and vessel $ 48,526 $ 23,922
Corporate accruals 463 1,587
Interest and dividends 2,610 6,678
Payroll and benefits (note 16f) 8,136 8,669
Accrued liabilities $ 59,735 $ 40,856