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Preferred, Common Stock and Additional Paid in Capital - Share Re-purchase Plan (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended | 29 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2012 | Aug. 10, 2011 | Feb. 23, 2010
Payments For Repurchase Of Equity [Abstract] |  |  |  |
Share repurchase plan - authorized amount |  |  | $ 3,000 us-gaap_StockRepurchaseProgramAuthorizedAmount1 | $ 30,000 us-gaap_StockRepurchaseProgramAuthorizedAmount1
Share repurchase plan - remaining authorized amount | 2,140 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 | 2,140 us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 |  |
Repurchase of common shares | 861 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue |  |  |
Reinstatement Of Share Repurchase Plan |  |  |  |
Payments For Repurchase Of Equity [Abstract] |  |  |  |
Share repurchase program - maximum share price |  | $ 19.5 sblk_StockRepurchaseProgramMaximumSharePrice / us-gaap_ShareRepurchaseProgramAxis = sblk_ReinstatementShareRepurchasePlanMember |  |
Treasury Stock |  |  |  |
Payments For Repurchase Of Equity [Abstract] |  |  |  |
Share repurchase plan - shares repurchased and cancelled | 61,730 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_ShareRepurchaseProgramAxis = us-gaap_TreasuryStockMember |  |  |
Repurchase of common shares | 860 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_ShareRepurchaseProgramAxis = us-gaap_TreasuryStockMember |  |  |
Common Stock |  |  |  |
Payments For Repurchase Of Equity [Abstract] |  |  |  |
Share repurchase plan - shares repurchased and cancelled | 61,730 us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Repurchase of common shares | $ 1 us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |

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- Definition The maximum purchase price per share which has been authorized under the share repurchase plan. + References No definition available. + Details
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- Details
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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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- Details
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- Details
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- Details
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