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Interest and Finance Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Borrowing costs [abstract]    
Interest expense (recovery) $ 16,879  
Interest expense (recovery)   $ (678)
Finance fees 2,500 2,293
Accretion expense (Note 17) 9,903 6,524
Interest and finance expense $ 29,282 $ 8,139