XML 47 R31.htm IDEA: XBRL DOCUMENT
v3.19.1

Advances for Vessels (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Advances For Assets Acquisition And Assets Under Construction |
Advances for Vessel Acquisition and Vessels under Construction | Advances for vessels are comprised of the following:
Balance, January 1, 2017 | $ | 13,007 |
Additions for advances, including capitalized expenses and interest | 58,150 |
Transferred to vessel cost (refer to Note 4) | (67,504 | )
Balance, December 31, 2017 | 3,653 |
Additions for advances, including capitalized expenses and interest | 65,425 |
Transferred to vessel cost (refer to Note 4) | (60,482 | )
Balance, December 31, 2018 | $ | 8,596 |

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

X
- Definition Tabular disclosure of the gross amounts of long-lived assets under construction that includes construction costs, advances paid for vessels acquisition and vessels under construction, including capitalized expenses and interest, that have not been completed and delivered and not ready to be placed into service and transfers to vessels cost of vessels acquisitions and vessels under construction that have been completed and delivered and placed into service during the reporting period. + References No definition available. + Details
Name: | sb_AdvancesForVesselAcquisitionAndVesslsUnderConstructionTableTextBlock
Namespace Prefix: | sb_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration