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Revenues Revenues, Text details (Details) | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) vessel
Disaggregation of Revenue [Line Items] |
Number of vessels on long-term contracts | vessel | 3
Period after charter, available to purchase | 7 years
Purchase price | $ 39,000
Purchase price commission | 1.00%
Annual decrease in purchase price | $ 1,500
Minimum |
Disaggregation of Revenue [Line Items] |
Term of charter contract | 1 month
Term of charter contract, long-term | 10 years
Remaining term of charter contracts | 2 years
Charter contract renewal term | 1 month
Maximum |
Disaggregation of Revenue [Line Items] |
Term of charter contract | 6 months
Term of charter contract, long-term | 20 years
Remaining term of charter contracts | 12 years
Charter contract renewal term | 12 months

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- Definition Disposition Of Assets, Annual Decrease In Price + References No definition available. + Details
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- Definition Disposition Of Assets, Purchase Price Commission + References No definition available. + Details
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Namespace Prefix: | sb_
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Balance Type: | na
Period Type: | duration

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- Definition Disposition of Assets, Purchase Price + References No definition available. + Details
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- Definition Number Of Vessels On Long-term Contracts + References No definition available. + Details
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- Definition Time Charter And Voyage, Term Of Charter Contract + References No definition available. + Details
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Namespace Prefix: | sb_
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Balance Type: | na
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- Definition Time Charter And Voyage, Term Of Charter Contract, Long-term + References No definition available. + Details
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- Definition Time Charter And Voyage, Term Of Charter Contract, Renewal Term + References No definition available. + Details
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- Definition Time Charter and Voyage, Term of Charter Contract, Remaining Term + References No definition available. + Details
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- Definition Vessel, Period After Charter, Available To Purchase + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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