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Lease Commitments (Details) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($)
Capital leased assets, Number of vessels | 27 |
Proceeds from Sale of Property, Plant, and Equipment | $ 20,026 | $ 0
Interest and finance costs | 14,652 | 8,905
Depreciation | 59,781 | 43,243
OCC vessels |  |
Capital lease obligations incurred | $ 65,250 |
SK Shipholding S.A. | Star Pisces |  |
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 |
Ocean Trust Co. Ltd. | Star Libra |  |
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 |
Kyowa Sansho Co. Ltd. | Star Challenger |  |
Description of Capital leases, Term of contract | Bareboat charter for eleven years |
Proceeds from Sale of Property, Plant, and Equipment | $ 15,000 |
NIBC $32,000 Facility |  |
Extinguishment of Debt, Amount | 11,671 |
HSH Nordbank AG $35,000 Facility |  |
Extinguishment of Debt, Amount | 10,874 |
Vessels under bareboat leases |  |
Capital leased assets, gross amount | 783,634 |
Capital leased assets, Accumulated depreciation | 51,481 |
Depreciation | 12,688 | $ 7,319
Capital lease, early prepayment fee | 1,399 |
Write off of Deferred Debt Issuance Cost | $ 25 |

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