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Vessels and Other Fixed Assets, Net (Details) $ in Thousands |  |  | 1 Months Ended | 2 Months Ended | 3 Months Ended | 5 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 08, 2015 USD ($) | Aug. 19, 2014 USD ($) shares | Feb. 09, 2015 | Feb. 04, 2015 | Jan. 21, 2015 | Mar. 12, 2015 | Feb. 27, 2015 USD ($) | Mar. 07, 2014 | Feb. 13, 2014 | Apr. 07, 2015 | Apr. 02, 2015 USD ($) | Mar. 31, 2015 USD ($) | Mar. 25, 2015 | Jun. 04, 2015 | May. 28, 2015 USD ($) | May. 27, 2015 USD ($) | Jun. 30, 2015 USD ($) shares | Jun. 26, 2015 | Jun. 23, 2015 | Jun. 17, 2015 | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($) | Jan. 24, 2014 USD ($)
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire property plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 317,538 |  |  |  | $ 74,267 |  |
Loss on sale of vessel |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,389 |  |  |  | 0 |  |
Vessel impairment loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,829 |  |  |  | $ 0 |  |
Star Vega |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  | Feb. 13, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 98,681 |  |  |  |  |  |
Star Sirius |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  | Mar. 07, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 98,681 |  |  |  |  |  |
Star Sirius and Star Vega |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracted sale / purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 60,000
Gross daily charter rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15 |  |  |  |  |  |
Brokerage commission |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.25% |  |  |  |  |  |
Indomitable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date | Jan. 08, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 182,476 |  |  |  |  |  |
Payments to acquire property plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 34,942 |
Honey Badger and Wolverine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  | Feb. 27, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Honey Badger |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 61,297 |  |  |  |  |  |
Payments to acquire property plant and equipment |  |  |  |  |  |  | $ 19,422 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Wolverine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 61,297 |  |  |  |  |  |
Payments to acquire property plant and equipment |  |  |  |  |  |  | 19,422 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Idee Fixe |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  |  |  |  | Mar. 25, 2015 |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 63,458 |  |  |  |  |  |
Roberta |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  |  |  | Mar. 31, 2015 |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 63,426 |  |  |  |  |  |
Laura |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  | Apr. 07, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 63,399 |  |  |  |  |  |
Kaley |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Jun. 26, 2015 |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 63,283 |  |  |  |  |  |
Gargantua |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  |  | Apr. 02, 2015 |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 209,529 |  |  |  |  |  |
Payments to acquire property plant and equipment |  |  |  |  |  |  |  |  |  |  | $ 37,682 |  |  |  |  |  |  |  |  |  |  |  |
Deep Blue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | May 27, 2015 |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 182,608 |  |  |  |  |  |
Payments to acquire property plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 34,982 |  |  |  |  |  |  |
Star Nina, Star Nicole, Star Claudia, Star Monisha, Rodon and Star Jennifer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares to acquire vessels | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,257,887 |  |  |  |  |  |
Payments to acquire property plant and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 39,475 |  |  |  |  |  |
Star Julia |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  | Feb. 04, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Star Tatianna |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  | Feb. 09, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rodon |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  | Mar. 12, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Star Monika |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  | Apr. 07, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |
Assets held for sale - impairment loss |  |  |  |  |  |  |  |  |  |  |  | $ 1,080 |  |  |  |  |  |  |  |  |  |  |
Star Kim |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  | Jan. 21, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Star Big |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  |  |  |  |  | Jun. 04, 2015 |  |  |  |  |  |  |  |  |
Star Christianna |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Jun. 23, 2015 |  |  |  |
Star Mega |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Jun. 17, 2015 |  |  |
Maiden Voyage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 58,722 |  |  |  | 58,722 |  |
Vessel impairment loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,282 |  |  |  |  |  |  |  |
New Yangzijiang Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DWT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 64,000 |  |  |  |  |  |
Number of vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |
Vessel purchase price obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000 |  |  |  |  |  |
Interest and finance costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 872 |  |  |  |  |  |
Vessels and other fixed assets, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 123,210 |  |  |  |  |  |
Accumulated amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 842 |  |  |  |  |  |
BNP $32,480 Facility | Indomitable |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn down | $ 32,480 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sinosure Facility | Honey Badger and Wolverine |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn down |  |  |  |  |  |  | $ 38,162 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
DNB-SEB-CEXIM $227,500 Facility | Gargantua |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn down |  |  |  |  |  |  |  |  |  |  | $ 32,400 |  |  |  |  |  |  |  |  |  |  |  |
DVB $31,000 Deep Blue Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn down |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28,680 |  |  |  |  |  |  |
DVB $31,000 Deep Blue Facility | Deep Blue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount drawn down |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 28,680 |  |  |  |  |  |  |
Excel Vessel CiT Facility | Star Julia, Star Tatianna, Star Monika and Star Kim |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayments of lines of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 18,181 |  |  |  |  |  |
Impairment charge, Fair value adjustment portion | Maiden Voyage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel impairment loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,411 |  |  |  |  |  |  |  |
Definite Agreements with Excel Maritime Carriers Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels Acquired |  | 34 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares to acquire vessels | shares |  | 29,917,312 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,257,887 |  |  |  |  |  |
Payments to acquire property plant and equipment |  | $ 288,391 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financed by New Yangzijiang owner | New Yangzijiang Vessels |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessels [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equipment on lease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,680 |  |  |  |  |  |

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