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v3.19.1

Vessels, Net, detail (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) item | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Vessel Cost |  |  |
Beginning Balance | $ 1,211,869 | $ 1,324,800 |
Transfer from Advances for vessels | 60,482 | 67,504 |
Disposal |  | (20,630) |
Impairment loss |  | (159,805) |
Ending Balance | 1,272,351 | 1,211,869 | $ 1,324,800
Accumulated Depreciation |  |  |
Beginning Balance | (268,993) | (286,081) |
Impairment loss |  | 68,512 |
Depreciation | (48,067) | (51,424) | (49,485)
Ending Balance | (317,060) | (268,993) | (286,081)
Net Book Value |  |  |
Beginning Balance | 942,876 | 1,038,719 |
Transfer from Advances for vessels | 60,482 | 67,504 |
Disposal |  | (20,630) |
Impairment loss |  | (91,293) |
Depreciation | (48,067) | (51,424) | (49,485)
Ending Balance | $ 955,291 | $ 942,876 | $ 1,038,719
Number of vessels provided as collateral | item | 39 |  |
Vessels provided as collateral | $ 914,804 |  |

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- Definition The aggregate amount of write-downs for impairments, reprezenting the difference between the gross book value and fair value less cost to sell, recognized during the period for property, plant and equipment for abandonment, exchange or sale. + References No definition available. + Details
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- Definition The carrying amount, as of the date of the latest financial statement presented, of vessels that are pledged as collateral to secure the related debt obligations. + References No definition available. + Details
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