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v3.21.1

Transactions with Related Parties (Details Narrative) | 6 Months Ended | 7 Months Ended | 12 Months Ended |  |
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Jul. 06, 2018 USD ($) shares | Jun. 28, 2018 shares | Aug. 03, 2018 shares | Dec. 31, 2020 USD ($) | Dec. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 21, 2016 USD ($) | Dec. 21, 2016 EUR (€) | Dec. 31, 2012 USD ($) | Dec. 31, 2012 EUR (€) | May 31, 2020 USD ($) | Dec. 31, 2014
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage expenses |  |  |  | $ 200,058,000 |  | $ 222,962,000 | $ 121,596,000 |  |  |  |  |  |
Due to Related Parties, Current |  |  |  | 1,439,000 |  | 4,017,000 |  |  |  |  |  |  |
General and Administrative Expense |  |  |  | 31,881,000 |  | 34,819,000 | 33,972,000 |  |  |  |  |  |
Management fees |  |  |  | 18,405,000 |  | 17,500,000 | 11,321,000 |  |  |  |  |  |
Cash portion of the consideration |  |  |  | 72,059,000 |  | 347,140,000 | 328,634,000 |  |  |  |  |  |
Charter-in expense |  |  |  | $ 32,055,000 |  | 126,813,000 | 92,896,000 |  |  |  |  |  |
Augustea Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels acquired |  |  | 16 |  |  |  |  |  |  |  |  |  |
Number of shares issued as part of the final consideration | shares | shares |  |  | 10,277,335 |  |  |  |  |  |  |  |  |  |
Songa Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels acquired | 15 |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued as part of the final consideration | shares | shares | 13,725,000 |  |  |  |  |  |  |  |  |  |  |  |
Cash portion of the consideration | $ 144,550,000 |  |  |  |  |  |  |  |  |  |  |  |
OCC Vessels [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels acquired |  | 3 |  |  |  |  |  |  |  |  |  |  |
Number of shares issued as part of the final consideration | shares | shares |  | 3,304,735 |  |  |  |  |  |  |  |  |  |  |
Oaktree Capital Management L.P. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  | 3 |  |  |  |  |  |  |  |  |
Voting percentage |  |  |  | 33.00% |  |  |  |  |  |  |  |  |
Euro Member Countries, Euro |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Rate, Translation |  |  |  | 1.23 |  |  |  |  |  |  |  |  |
Interchart [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  |  |  |  | 33.00%
Voyage expenses |  |  |  | $ 3,780,000 |  | 3,850,000 | 3,400,000 |  |  |  |  |  |
Due from Related Parties |  |  |  | 3,000 |  |  |  |  |  |  |  |  |
Interchart [Member] | Services Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly lump sum fee |  |  |  |  |  |  | 275,000 |  |  |  |  |  |
Interchart [Member] | New Services Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly lump sum fee |  |  |  |  |  | 325,000 |  |  |  |  |  |  |
Interchart [Member] | Services Agreement Renewal [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly lump sum fee |  |  |  | 315,000 |  |  |  |  |  |  |  |  |
Management [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Consultancy fees |  |  |  | 539,000 |  |  |  |  |  |  |  |  |
Due to Related Parties, Current |  |  |  | 252,000 |  | 246,000 |  |  |  |  |  |  |
Management [Member] | Attendance Of Meetings [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Consultancy fees |  |  |  | 179,000 |  | 179,000 | 159,000 |  |  |  |  |  |
Management [Member] | Consulting Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Consultancy fees |  |  |  | 598,000 |  | 655,000 | 534,000 |  |  |  |  |  |
Combine Marine Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Rent expense per month |  |  |  |  |  |  |  |  |  | $ 3,100 |  |  |
Combine Marine Ltd [Member] | Euro Member Countries, Euro |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Rent expense per month | € |  |  |  |  |  |  |  |  |  |  | € 2,500 |  |
Alma Properties [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Rent expense per month |  |  |  |  |  |  |  | $ 400 |  |  |  |  |
Lessee, Operating Lease, Term of Contract |  |  |  |  |  |  |  | 6 years | 6 years |  |  |  |
Operating Lease, Expense |  |  |  | 40,000 |  | 39,000 | 41,000 |  |  |  |  |  |
Alma Properties [Member] | Euro Member Countries, Euro |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Rent expense per month | € |  |  |  |  |  |  |  |  | € 300 |  |  |  |
Oceanbulk Maritime and its affiliates [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Due from Related Parties |  |  |  | 426,000 |  | 327,000 |  |  |  |  |  |  |
General and Administrative Expense |  |  |  | $ 268,000 |  | 324,000 | 322,000 |  |  |  |  |  |
Oaktree Shareholder Agreement [Member] | Oaktree Capital Management L.P. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  | 9 |  |  |  |  |  |  |  |  |
Oaktree Shareholder Agreement [Member] | Beneficial ownership of 40% ore more [Member] | Oaktree Capital Management L.P. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  | 4 |  |  |  |  |  |  |  |  |
Oaktree Shareholder Agreement [Member] | Beneficial Ownershio of 25% or more but less than 40% [Member] | Oaktree Capital Management L.P. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  | 3 |  |  |  |  |  |  |  |  |
Oaktree Shareholder Agreement [Member] | Beneficial Ownership of 15% or more but less than 25% [Member] | Oaktree Capital Management L.P. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  | 2 |  |  |  |  |  |  |  |  |
Oaktree Shareholder Agreement [Member] | Beneficial ownership of 5% or more but less than 15% [Member] | Oaktree Capital Management L.P. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of directors |  |  |  | 1 |  |  |  |  |  |  |  |  |
Augustea Technoservices Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Voyage expenses |  |  |  | $ 95,000 |  | 0 | 0 |  |  |  |  |  |
Due to Related Parties, Current |  |  |  | 1,187,000 |  | 2,879,000 |  |  |  |  |  |  |
Management fees |  |  |  | 6,588,000 |  | 6,564,000 | 2,309,000 |  |  |  |  |  |
Songa Shipmanagement Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Management fees |  |  |  | 0 |  | 32,000 | 376,000 |  |  |  |  |  |
Sydelle [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Due to Related Parties, Current |  |  |  | (0) |  | 19,000 |  |  |  |  |  |  |
Charter-in expense |  |  |  | 540,000 |  | 5,505,000 | 0 |  |  |  |  |  |
Sydelle [Member] | Profit Sharing Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Due to Related Parties, Current |  |  |  |  |  |  | 302,000 |  |  |  |  |  |
Voyage revenues |  |  |  | 0 |  | 0 | (875,000) |  |  |  |  |  |
Starocean [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Due from Related Parties |  |  |  | $ 34,000 |  | 41,000 |  |  |  |  |  |  |
Ownership percentage |  |  |  | 25.00% |  |  |  |  |  |  |  |  |
Equity method investment |  |  |  | $ 128,000 |  | 123,000 |  |  |  |  |  |  |
Starocean [Member] | Held By Local Entrepreneurs [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  | 75.00% |  |  |  |  |  |  |  |  |
AOM [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Due from Related Parties |  |  |  | $ 0 |  | 195,000 |  |  |  |  |  |  |
Charter-in expense |  |  |  | 5,442,000 |  | 2,589,000 |  |  |  |  |  |  |
Coromel Maritime Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Due from Related Parties |  |  |  | 1,000 |  |  |  |  |  |  |  |  |
Due to Related Parties, Current |  |  |  | (0) |  | 873,000 |  |  |  |  |  |  |
Charter-in expense |  |  |  | 249,000 |  | 5,723,000 | 0 |  |  |  |  |  |
Eagle Bulk [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Charter-in expense |  |  |  | $ 0 |  | $ 1,908,000 | $ 0 |  |  |  |  |  |
Eagle Bulk [Member] | First Vessel [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Charter hire daily rate |  |  |  |  |  | $16.3 |  |  |  |  |  |  |
Operating Lease, Weighted Average Remaining Lease Term |  |  |  |  |  | 2 months |  |  |  |  |  |  |
Eagle Bulk [Member] | Second Vessel [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Charter hire daily rate |  |  |  |  |  | $15.8 |  |  |  |  |  |  |
Operating Lease, Weighted Average Remaining Lease Term |  |  |  |  |  | 2 months |  |  |  |  |  |  |
Piraeus Bank S. A. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  | $ 50,350,000 |
CCL Pool [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  | 25.00% |  |  |  |  |  |  |  |
Debt Conversion, Converted Instrument, Amount |  |  |  |  | $ 125,000 |  |  |  |  |  |  |  |

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