XML 88 R72.htm IDEA: XBRL DOCUMENT
v3.19.1

Dividends, textual (Details) ¥ / shares in Units, $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 JPY (¥) dividend ¥ / shares | Dec. 31, 2018 USD ($) dividend $ / shares | Dec. 31, 2017 USD ($) dividend $ / shares
Class of Stock [Line Items] |  |  |
Preferred stock dividend, final portion (in USD per share) | $ / shares |  | $ 0.11667 |
Series B Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Number of quarters, dividend payments | dividend | 4 | 4 | 4
Preferred stock dividends, cash paid quarterly (per share) | $ / shares |  | $ 0.5 | $ 0.5
Payments of ordinary dividends, preferred stock and preference stock |  | $ 234 | $ 1,316
Series C Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Payments of ordinary dividends, preferred stock and preference stock |  | 4,600 | 4,600
Series D Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Payments of ordinary dividends, preferred stock and preference stock |  | $ 6,400 | $ 6,400
Quarterly Dividend One | Pinewood | Series A Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock dividends, cash paid quarterly (per share) | (per share) | ¥ 32,981.64 | $ 298.52 |
Quarterly Dividend Two | Pinewood | Series A Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock dividends, cash paid quarterly (per share) | (per share) | ¥ 137,923.25 | $ 1,231.37 |
Payments of ordinary dividends, preferred stock and preference stock | ¥ 17,090,489.00 | $ 153 |
Quarterly Dividend Three | Pinewood | Series A Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock, per share, dividends declared (per share) | (per share) | ¥ 137,923.25 | $ 1,226.52 |
Dividends | ¥ 13,792,325.00 | $ 123 |

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 Preferred Stock Dividend, Final Portion (in USD per share) + References No definition available. + Details
Name: | sb_PreferredStockDividendFinalPortioninUSDpershare
Namespace Prefix: | sb_
Data Type: | num:perShareItemType
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 paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
Name: | us-gaap_Dividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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=98514028&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of preferred stock outstanding. + References No definition available. + Details
Name: | us-gaap_PreferredStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
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: |

X
- Details
Name: | us-gaap_DividendsAxis=sb_QuarterlyDividendOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=sb_PinewoodMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_DividendsAxis=sb_QuarterlyDividendTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=sb_QuarterlyDividendThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |