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Lease financing (Details) $ in Thousands | 4 Months Ended | 6 Months Ended | 7 Months Ended | 9 Months Ended | 11 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 30, 2019 USD ($) | Jul. 10, 2019 USD ($) | Jul. 31, 2019 USD ($) | Sep. 27, 2018 USD ($) | Nov. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | May 27, 2019 USD ($)
Capital leased assets, net amount |  |  |  |  |  | $ 798,863 | $ 992,777 |  |
Accumulated amortization |  |  |  |  |  | 72,555 | 51,956 |  |
Interest and finance costs |  |  |  |  |  | 27,251 | 26,825 | $ 12,590 |
Proceeds from Sale of Property, Plant, and Equipment |  |  |  |  |  | 56,632 | 0 | 15,153 |
Payments for bareboat leases |  |  |  |  |  | $ 623,892 | 875,037 | 86,262 |
Star Pisces | SK Shipholding S.A. |  |  |  |  |  |  |  |  |
Description of Capital leases, Term of contract |  |  |  |  |  | Bareboat charter for seven years |  |  |
Vessel purchase price obligation |  |  |  |  |  | $ 7,628 |  |  |
Proceeds from Sale of Property, Plant, and Equipment | $ 19,125 |  |  |  |  |  |  |  |
Capital leases, Date |  |  |  |  |  | April 2019 |  |  |
Star Libra | Ocean Trust Co. Ltd. |  |  |  |  |  |  |  |  |
Description of Capital leases, Term of contract |  |  |  |  |  | Bareboat charter for seven years |  |  |
Vessel purchase price obligation |  |  |  |  |  | $ 18,107 |  |  |
Proceeds from Sale of Property, Plant, and Equipment |  |  | $ 33,950 |  |  |  |  |  |
Capital leases, Date |  |  |  |  |  | July 2019 |  |  |
Star Challenger | Kyowa Sansho |  |  |  |  |  |  |  |  |
Description of Capital leases, Term of contract |  |  |  |  |  | Bareboat charter for eleven years |  |  |
Proceeds from Sale of Property, Plant, and Equipment |  | $ 15,000 |  |  |  |  |  |  |
Delphin Vessels | CMBL |  |  |  |  |  |  |  |  |
Description of Capital leases, Term of contract |  |  |  |  |  | Bareboat charter for seven years |  |  |
Sale leaseback transaction, Remaining borrowing capacity |  |  |  |  |  |  |  |  | $ 91,431
Delphin Vessels | CMBL | Minimum |  |  |  |  |  |  |  |  |
Vessel purchase price obligation |  |  |  |  |  | $ 975 |  |  |
Delphin Vessels | CMBL | Maximum |  |  |  |  |  |  |  |  |
Vessel purchase price obligation |  |  |  |  |  | 3,379 |  |  |
Delphin Scrubbers | CMBL |  |  |  |  |  |  |  |  |
Sale leaseback transaction, Remaining borrowing capacity |  |  | $ 15,000 |  |  |  |  |  |
Amount drawn down |  |  |  |  |  | $ 0 |  |  |
Idee Fixe, Roberta, Laura and Kaley | New Yangzijiang |  |  |  |  |  |  |  |  |
Description of Capital leases, Term of contract |  |  |  |  |  | Bareboat charter for eight years |  |  |
Vessel purchase price obligation |  |  |  |  |  | $ 6,000 |  |  |
Capital leased assets, Number of vessels |  |  |  |  |  | 4 |  |  |
Songa Vessels | CMBL |  |  |  |  |  |  |  |  |
Sale leaseback transaction, Remaining borrowing capacity |  |  |  |  |  | $ 180,000 |  |  |
Songa Vessels | CMBL | Minimum |  |  |  |  |  |  |  |  |
Vessel purchase price obligation |  |  |  |  |  | 2,200 |  |  |
Songa Vessels | CMBL | Maximum |  |  |  |  |  |  |  |  |
Vessel purchase price obligation |  |  |  |  |  | 8,400 |  |  |
Songa Scrubbers | CMBL |  |  |  |  |  |  |  |  |
Sale leaseback transaction, Remaining borrowing capacity |  |  |  |  |  | $ 19,600 |  |  |
Amount drawn down |  |  |  |  | $ 12,165 |  |  |  |
Star Eleni and Star Leo | CMBL |  |  |  |  |  |  |  |  |
Sale leaseback transaction, Remaining borrowing capacity |  |  |  | $ 57,346 |  |  |  |  |
Star Eleni and Star Leo | CSSC |  |  |  |  |  |  |  |  |
Extinguishment of Debt, Amount |  |  |  | $ 58,112 |  |  |  |  |
Star Eleni | CMBL |  |  |  |  |  |  |  |  |
Description of Capital leases, Term of contract |  |  |  |  |  | Bareboat charter for five years |  |  |
Vessel purchase price obligation |  |  |  |  |  | $ 18,231 |  |  |
Star Leo | CMBL |  |  |  |  |  |  |  |  |
Description of Capital leases, Term of contract |  |  |  |  |  | Bareboat charter for five years |  |  |
Vessel purchase price obligation |  |  |  |  |  | $ 20,000 |  |  |
Star Fighter | Kyowa Sansho |  |  |  |  |  |  |  |  |
Description of Capital leases, Term of contract |  |  |  |  |  | Bareboat charter for ten years |  |  |
Vessel purchase price obligation |  |  |  |  |  |  | 2,450 |  |
Sale leaseback transaction, Remaining borrowing capacity |  |  |  |  |  |  | 16,125 |  |
Bareboat lease payments |  |  |  |  |  |  |  |  |
Payments for bareboat leases |  |  |  |  |  | $ 478,807 | 113,865 | $ 20,985 |
Variable portion of payments for bareboat lease obligations |  |  |  |  |  | 3-month LIBOR rate of 1.908% |  |  |
NIBC $32,000 Facility |  |  |  |  |  |  |  |  |
Extinguishment of Debt, Amount |  |  |  |  |  | $ 11,671 |  |  |
HSH Nordbank AG $35,000 Facility |  |  |  |  |  |  |  |  |
Extinguishment of Debt, Amount |  | $ 10,874 |  |  |  |  | $ 11,958 |  |

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