XML 95 R80.htm IDEA: XBRL DOCUMENT
v3.21.1

Fair Value Measurements and Hedging - Derivative instruments effect on statement of operations (Table) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Gain/(loss) on interest rate swaps, net |  |  |
Unrealized gain/(loss) after de-designation of accounting hedging relationship (April 1, 2015) | $ (0) | $ (0) | $ 140
Realized gain/(loss) after de-designation of accounting hedging relationship (April 1, 2015) | (0) | (0) | (141)
Write-off of unrealized losses related to forecasted transactions which are no longer considered probable reclassified from other comprehensive income/(loss) | (0) | (0) | 708
Total Gain/(loss) on interest rate swaps, net | 0 | 0 | 707
Interest and finance costs |  |  |
Reclassification adjustments of interest rate swap loss/(gain) transferred to Interest and finance costs from Other comprehensive income/(loss) (Note 9) | (848) | (0) | 3
Total Gain/(loss) recognized | (848) | (0) | 3
Gain/(loss) on forward freight agreements and bunker swaps, net |  |  |
Total Gain/(loss) recognized | 16,156 | 4,411 | (447)
Forward Freight Agreements [Member] |  |  |
Gain/(loss) on forward freight agreements and bunker swaps, net |  |  |
Realized gain/(loss) on forward freight agreements and freight options | (5,995) | 6,043 | (599)
Unrealized gain/(loss) on forward freight agreements and freight options | (430) | (321) | 520
Bunker Swaps [Member] |  |  |
Gain/(loss) on forward freight agreements and bunker swaps, net |  |  |
Realized gain/(loss) on bunker swaps | 20,856 | (1,386) | 1,491
Unrealized gain/(loss) on bunker swaps | 1,725 | 75 | (1,859)
Forward Freight And Bunker Swaps [Member] |  |  |
Gain/(loss) on forward freight agreements and bunker swaps, net |  |  |
Total Gain/(loss) recognized | $ 16,156 | $ 4,411 | $ (447)

X
- Definition The aggregate net effect in earnings due to derivatives. + References No definition available. + Details
Name: | sblk_GainLossOnDerivativeInstrumentsAggregateNetEffectInEarnings
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) included in earnings for the period from the settlement of interest rate derivatives not designated as hedging instruments. + References No definition available. + Details
Name: | sblk_InterestRateDerivativeGainLossRealizedInEarningsNet
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The realized gain / (loss) of bunker swaps agreements, held at each balance sheet date, that was included in earnings for the period. + References No definition available. + Details
Name: | sblk_RealizedGainLossOnBunkerSwaps
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The realized gain / (loss) of forward freight agreements, held at each balance sheet date, that was included in earnings for the period. + References No definition available. + Details
Name: | sblk_RealizedGainLossOnForwardFreightAgreements
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The net change in the difference between the fair value, of bunker swaps, held at each balance sheet date, that was included in earnings for the period. + References No definition available. + Details
Name: | sblk_UnrealizedGainLossOnBunkerSwaps
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net change in the difference between the fair value, of forward freight agreements, held at each balance sheet date, that was included in earnings for the period. + References No definition available. + Details
Name: | sblk_UnrealizedGainLossOnForwardFreightAgreements
Namespace Prefix: | sblk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DerivativeGainLossOnDerivativeNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
Name: | us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
Name: | us-gaap_GainLossOnDerivativeInstrumentsNetPretax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of net gain (loss) reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
Name: | us-gaap_GainLossOnDiscontinuationOfCashFlowHedgeDueToForecastedTransactionProbableOfNotOccurringNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) included in earnings for the period from the increase (decrease) in fair value of interest rate derivatives not designated as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
Name: | us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InterestAndDebtExpenseAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
Name: | us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=sblk_ForwardFreightAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=sblk_BunkerSwapsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=sblk_ForwardFreightAndBunkerSwapsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |