XML 81 R65.htm IDEA: XBRL DOCUMENT v3.19.1

Fair Value of Financial Instruments and Derivative Instruments Interest Rate Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Notional amount	$ 0	$ 71,309
Marindou | Interest Rate Swap
Derivative [Line Items]
Fixed interest rate	1.60%
Notional amount	$ 0	18,109
Petra | Interest Rate Swap
Derivative [Line Items]
Fixed interest rate	0.98%
Notional amount	$ 0	14,000
Pemer | Interest Rate Swap
Derivative [Line Items]
Fixed interest rate	0.9475%
Notional amount	$ 0	14,000
Avstes | Interest Rate Swap
Derivative [Line Items]
Fixed interest rate	1.35%
Notional amount	$ 0	14,000
Shikoku | Interest Rate Swap
Derivative [Line Items]
Fixed interest rate	1.25%
Notional amount	$ 0	$ 11,200

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=sb_MarindouMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=sb_PetraMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=sb_PemerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=sb_AvstesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=sb_ShikokuMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: