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