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v3.20.1

Transactions with Related Parties - Additional Information (Details) | 2 Months Ended | 6 Months Ended | 7 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2019 USD ($) | Aug. 31, 2019 USD ($) | Jul. 06, 2018 USD ($) shares | Jun. 28, 2018 shares | Aug. 03, 2018 shares | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 21, 2016 USD ($) | Dec. 21, 2016 EUR (€) | Dec. 31, 2012 USD ($) | Dec. 31, 2012 EUR (€)
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Rent expense |  |  |  |  |  | $ 126,813,000 | $ 92,896,000 | $ 5,325,000 |  |  |  |
Cash portion of the consideration |  |  |  |  |  | 347,140,000 | 328,634,000 | 143,684,000 |  |  |  |
Outstanding payable |  |  |  |  |  | $ 4,017,000 | 1,649,000 |  |  |  |  |
Charter - in period |  |  |  |  |  | 2 years 2 months 1 day |  |  |  |  |  |
Combine Marine Ltd |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Rent expense per month |  |  |  |  |  |  |  |  |  |  | $ 2,800 |
Rent expense |  |  |  |  |  | $ 35,000 | 37,000 | 35,000 |  |  |  |
Alma Properties |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Leasing agreements, Office space, Term of contract |  |  |  |  |  |  |  |  | 6 years | 6 years |  |
Rent expense per month |  |  |  |  |  |  |  |  | $ 300 |  |  |
Rent expense |  |  |  |  |  | $ 4,000 | 4,000 | $ 4,000 |  |  |  |
StarOcean Manning Philippines Inc. |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  | 25.00% |  |  |  |  |  |
Equity method investment (included in Other Current Assets) |  |  |  |  |  | $ 123,000 | $ 50,000 |  |  |  |  |
Eagle Bulk |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of time charter agreements |  |  |  |  |  | 2 |  |  |  |  |  |
Number of charter-in vessels |  |  |  |  |  | 2 |  |  |  |  |  |
Euro |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Exchange rate EUR/USD |  |  |  |  |  | 1.12 |  |  |  |  |  |
Euro | Combine Marine Ltd |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Rent expense per month | € |  |  |  |  |  |  |  |  |  |  |  | € 2,500
Euro | Alma Properties |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Rent expense per month | € |  |  |  |  |  |  |  |  |  | € 300 |  |
Oaktree |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  |  |  | 4 |  |  |  |  |  |
Voting percentage |  |  |  |  |  | 33.00% |  |  |  |  |  |
Oaktree | Oaktree Shareholders Agreement |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  |  |  | 9 |  |  |  |  |  |
Oaktree | Oaktree Shareholders Agreement | Beneficial Ownership of 40% or more |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  |  |  | 4 |  |  |  |  |  |
Oaktree | Oaktree Shareholders Agreement | Beneficial Ownership of 25% or more but less than 40% |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  |  |  | 3 |  |  |  |  |  |
Oaktree | Oaktree Shareholders Agreement | Beneficial Ownership of 15% or more but less than 25% |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  |  |  | 2 |  |  |  |  |  |
Oaktree | Oaktree Shareholders Agreement | Beneficial Ownership of 5% or more but less than 15% |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  |  |  | 1 |  |  |  |  |  |
Augustea Vessels |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels acquired |  |  |  |  | 16 |  |  |  |  |  |  |
Number of shares issued as part of the final consideration | shares |  |  |  |  | 10,277,335 |  |  |  |  |  |  |
Songa Vessels |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels acquired |  |  | 15 |  |  |  |  |  |  |  |  |
Number of shares issued as part of the final consideration | shares |  |  | 13,725,000 |  |  |  |  |  |  |  |  |
Songa Vessels | Financed by China Merchants Bank Leasing |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash portion of the consideration |  |  | $ 144,550,000 |  |  |  |  |  |  |  |  |
OCC vessels |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of vessels acquired |  |  |  | 3 |  |  |  |  |  |  |  |
Number of shares issued as part of the final consideration | shares |  |  |  | 3,304,735 |  |  |  |  |  |  |  |
First vessel | Eagle Bulk |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Charter - in period |  | 2 months |  |  |  |  |  |  |  |  |  |
Charter hire daily rate |  | $ 16,300 |  |  |  |  |  |  |  |  |  |
Second vessel | Eagle Bulk |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Charter - in period | 2 months |  |  |  |  |  |  |  |  |  |  |
Charter hire daily rate | $ 15,800 |  |  |  |  |  |  |  |  |  |  |

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