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Future Minimum Time Charter Revenue, textual (Details) | 12 Months Ended
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Dec. 31, 2016
Future Minimum Time Charter Revenue |
Estimated Offhire Days | 12 days

X
- Definition The estimated number of offhire days taken into consideration in arriving at the minimum future charter revenue. + References No definition available. + Details
Name: | sb_EstimatedOffhireDays
Namespace Prefix: | sb_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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