XML 89 R76.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Dividends, textual (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) item $ / shares
Series B cumulative redeemable perpetual preferred shares |
Class of Stock [Line Items] |
Preferred Stock Dividends Per Share Cash Paid Quarterly | $ / shares | $ 0.5
Number Of Quarters Of Dividend Payments | item | 4
Dividends paid preferred shares | $ | $ 3,049
Series C cumulative redeemable perpetual preferred shares |
Class of Stock [Line Items] |
Preferred Stock Dividends Per Share Cash Paid Quarterly | $ / shares | $ 0.5
Number Of Quarters Of Dividend Payments | item | 4
Dividends paid preferred shares | $ | $ 4,600
Series D cumulative redeemable perpetual preferred shares |
Class of Stock [Line Items] |
Preferred Stock Dividends Per Share Cash Paid Quarterly | $ / shares | $ 0.5
Number Of Quarters Of Dividend Payments | item | 4
Dividends paid preferred shares | $ | $ 6,400

X
- Definition Number of quarters during the current period on which the company declared and paid dividends. + References No definition available. + Details
Name: | sb_NumberOfQuartersOfDividendPayments
Namespace Prefix: | sb_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Dividends paid quarterly for each share of preferred stock outstanding. + References No definition available. + Details
Name: | sb_PreferredStockDividendsPerShareCashPaidQuarterly
Namespace Prefix: | sb_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
Name: | us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesCPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesDPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |