XML 90 R30.htm IDEA: XBRL DOCUMENT
v3.20.1

Vessels, Net (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Property, Plant and Equipment [Abstract] |
Schedule of Vessels, Net | Vessels, net are comprised of the following:
|  | Vessel Cost |  | Accumulated Depreciation |  | Net Book Value
Balance, January 1, 2018 |  | $ | 1,211,869 |  |  | $ | (268,993 | ) |  | $ | 942,876 |
Transfer from Advances for vessels |  | 60,482 |  |  | — |  |  | 60,482 |
Depreciation expense |  | — |  |  | (48,067 | ) |  | (48,067 | )
Balance, December 31, 2018 |  | $ | 1,272,351 |  |  | $ | (317,060 | ) |  | $ | 955,291 |
Transfer from Advances for vessels |  | 39,725 |  |  | — |  |  | 39,725 |
Depreciation expense |  | — |  |  | (50,310 | ) |  | (50,310 | )
Balance, December 31, 2019 |  | $ | 1,312,076 |  |  | $ | (367,370 | ) |  | $ | 944,706 |

X
- Definition Tabular disclosure of the rollforward of the value of long-lived, physical assets that are used in the normal conduct of business and not intended for resale. + References No definition available. + Details
Name: | sb_ScheduleOfVesselsNetTableTextBlock
Namespace Prefix: | sb_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration