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Long-term Debt - Information Per Loan (Details) (USD $) In Thousands, unless otherwise specified | 60 Months Ended |  |  | 28 Months Ended |  |  | 23 Months Ended |  |  | 18 Months Ended |  |  |  |  |  | 15 Months Ended |  | 15 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 Commerzbank AG $120,000 facility | Dec. 31, 2011 Commerzbank AG $120,000 facility | Dec. 27, 2007 Commerzbank AG $120,000 facility | Dec. 31, 2012 Commerzbank AG $26,000 facility | Dec. 31, 2011 Commerzbank AG $26,000 facility | Sep. 03, 2010 Commerzbank AG $26,000 facility | Dec. 31, 2012 Credit Agricole Corporate and Investment Bank | Dec. 31, 2011 Credit Agricole Corporate and Investment Bank | Jan. 20, 2011 Credit Agricole Corporate and Investment Bank | Dec. 31, 2012 ABN Amro Bank N.V. | Dec. 31, 2011 ABN Amro Bank N.V. | Jul. 21, 2011 ABN Amro Bank N.V. | Dec. 31, 2012 HSH Nordbank AG | Dec. 31, 2011 HSH Nordbank AG | Oct. 03, 2011 HSH Nordbank AG | Dec. 31, 2012 HSH Nordbank AG - Supramax tranche | Oct. 03, 2011 HSH Nordbank AG - Supramax tranche | Dec. 31, 2012 HSH Nordbank AG - Capesize tranche | Oct. 03, 2011 HSH Nordbank AG - Capesize tranche
Long term debt [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan amount |  |  | $ 120,000 |  |  | $ 26,000 |  |  | $ 70,000 |  |  | $ 31,000 |  |  | $ 64,500 |  | $ 48,500 |  | $ 16,000
Vessels provided as security | Star Gamma, Star Delta, Star Epsilon, Star Zeta and Star Theta |  |  | Star Aurora |  |  | Star Borealis and Star Polaris |  |  | Star Big and Star Mega |  |  |  |  |  |  |  |  |
Loan reference interest rate | LIBOR |  |  | LIBOR |  |  | LIBOR |  |  | LIBOR |  |  |  |  |  | LIBOR or cost of funds (whichever is greater) |  | LIBOR or cost of funds (whichever is greater) |
Loan interest rate margin |  |  | 0.8% to 1.25% |  |  | 2.6% |  |  | 2.7% |  |  | 2.9% |  |  |  |  | 2.75% |  | 3%
Outstanding borrowings | $ 71,386 | $ 84,000 |  | $ 17,064 | $ 21,250 |  | $ 62,849 | $ 66,790 |  | $ 24,000 | $ 29,600 |  | $ 48,815 | $ 64,500 |  |  |  |  |

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- Definition The percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number APB14-1 -Paragraph 31 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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- Definition Discussion of whether the debt instrument is secured or unsecured, and, if secured, a description of the collateral and guarantees required or provided. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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