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Above market acquired charters (Details Narrative) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Above Market Acquired Charters      
Amortization $ 11,696 $ 14,380 $ 14,380
Carrying amount $ 34,579 $ 46,275 $ 60,655