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Advances for vessels under construction and acquisition of vessels (Tables)
12 Months Ended
Dec. 31, 2019
Advances for vessels under construction and acquisition of vessels [Abstract]  
Advances for vessels under construction and acquisition of vessels

Balance, December 31, 2017 $          48,574
- Additions         129,749
- OCC Vessels shares acquisition            42,962
- Capitalized interest               1,753
- Transfers to Vessel cost       (163,138)
Balance, December 31, 2018            59,900
- Additions            96,671
- Capitalized interest               1,018
- Transfers to Vessel cost       (157,589)
Balance, December 31, 2019                    -