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Future Minimum Time Charter Revenue, textual (Details)	12 Months Ended
	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