Amendment Description Amendment Flag Current Fiscal Year End Date Document Fiscal Period Focus Document Fiscal Year Focus Document Period End Date Document Type Entity Central Index Key Entity Common Stock Shares Outstanding Entity Current Reporting Status Entity Filer Category Entity Incorporation Date Of Incorporation Date of Incorporation Enity Registrant Name Entity Voluntary Filers Entity Well Known Seasoned Issuer Legal Entity [Axis] Carrying value as of the balance sheet date of obligations incurred through that date and payable for general and administrative expenses. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued General And Administrative Expenses General and administrative expenses Carrying value as of the balance sheet date of obligations incurred through that date and payable for loan interest and financing fees. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Loan Interest And Financing Fees Loan interest and financing fees Carrying value as of the balance sheet date of obligations incurred through that date and payable for operating and voyage expenses. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Operating And Voyage Expenses Vessel Operating and voyage expenses Carrying value as of the balance sheet date of obligations incurred through that date and payable for other professional fees, excluding legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued Professional Fees Other Current Other professional fees Additional Financing [Member] Additional financing The additional cash outflow associated with the acquisition of property, plant and equipment. Additional Payments To Acquire Property Plant And Equipment Additional payments to acquire property plant and equipment Commission payable by the shipowner to the charterer, expressed as a percentage of the freight or hire. Address Commission Percentage Address commission Commission payable by the shipowner to the charterer. Address Commission Address commission Advances For Vessels Acquisitions [Abstract] Tabular disclosure for advances paid to yard and capitalized expenses for the acquisition of vessels. Advances For Vessels Acquisitions [Table Text Block] Advances for Vessels Acquisitions This entire disclosure for advances paid to yards and capitalized expenses for acquisition of vessels. Advances For Vessels Acquisitions [Text Block] Advances for Vessels Acquisitions The cash outflow associated with the acquisition of vessels, bareboats, etc. Advances For Vessels Under Capital Leases Bareboat capital leases - upfront hire & handling fees Advances for vessels under construction and acquisition of vessels and other assets Amami [Member] Amami The first amendment / supplemental agreement. Amendment 1 [Member] First Amendment The second amendment / supplemental agreement. Amendment 2 [Member] Second Amendment The amortization of the asset arising from the market value of the time charter assumed from a vessel acquisition. Amortization Of Fair Value Of Above Market Acquired Time Charter Amortization Amortization of fair value of above market acquired time charters (Note 7) Amortization Amortization of fair value of above market acquired time charters (Note 7) The amount received for each tranche under the credit facility Amount Per Tranche Under Credit Facility Amount of each tranche Angelo Gordon Excel Investors [Member] Angelo, Gordon Excel investors Angelo Gordon Investor [Member] Angelo Gordon investors The annual consulting fees according to contract terms. Annual Consulting Fees Carrying value as of the balance sheet date of obligations incurred through that date and payable for accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Audit Fees Audit fees Bareboat Capital Leases [Member] Bareboat capital leases - upfront hire & handling fees Bareboat Commitments Charter Hire [Member] Bareboat commitments charter hire Big Bang [Member] Big Bang Big Fish [Member] Big Fish Bnp Facility [Member] The "BNP Facility" The commission charged by brokers, as a percentage of the agreed price. Brokerage Commission Percentage Brokerage commission The bunker contracts derivatives. Bunker Contracts [Member] Bunker Contracts Bunker Derivatives Carrying amount as of the balance sheet date of bunker's inventory. Bunker Inventory Current Bunkers Fair value per share, transferred. Business Acquisition Fair Value Per Share Transferred Fair value per share transferred CEO Incentive Award [Member] CEO Incentive Award Ceo Cfo [Member] CEO and CFO Chief Executive Officer First Installment [Member] First Installment CEO The company Combine Marine Ltd. Combine Marine Ltd [Member] Combine Marine Ltd (c) Combine Marine Ltd. Company's commercial claims. Commercial Claim 1 [Member] Commercial Claim Company's commercial claims. Commercial Claim [Member] Commercial Claim Several commercial claims CommisionsOnAcquisitionOfAssets Commisions on acquisitions of assets. Commisions On Acquisition Of Assets Commision fee for newbuilding vessels (d) Commisions on sale of assets. Sale related costs Commisions On Sale Of Assets Commission on sale of vessel Common Stock 1 [Member] Common Stock Common stock represents the most subordinated ownership interest in a corporation. Common Stock Parentheticals Member Common Stock Company And Subsidiaries Directors Officers And Employees [Member] Directors, Officers and Employees of the Company and its subsidiaries Companys Directors Mr Softeland Mr Schmitz [Member] Mr Softeland and Mr Schmitz Disclosure of accounting policy for revenue recognition on contracts, the timing of revenue recognition, and the bases for determining the amount of revenue recognized. Contracts Revenue Recognition [Policy Text Block] Revenue from Contracts with Customers Amount of contractual obligation for the construction of newbuilding vessels. Contractual Obligation Due Total The bank Credit Agricole Corporate and Investment Bank. Credit Agricole Corporate And Investment Bank [Member] Credit Agricole Corporate and Investment Bank (Loan agreement dated January 20, 2011) Credit Agricole Corporate and Investment Bank $70,000 facility The fee rate charged daily, persuant to the management agreement. Daily Management Fee Daily fixed management fee The percentage points added to the reference rate to compute the variable rate on the debt instrument. Debt Instrument Basis Spread On Variable Rate 2 Loan interest rate margin The cash inflow for the change associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities. Decrease In Restricted Cash1 Decrease in restricted cash The date the vessel was delivered to the Company. Delivery Date Of Vessel Date Delivered to Star Bulk Expected Delivery Date DeutscheBank [Member] Deutsche Bank, $39,000 facility Dioriga Facility [Member] The "Dioriga Facility" Document And Entity Information [Abstract] The element refers to the effective date of management agreement. Effective Date of Management Agreement Equity Incentive Plan 2013 [Member] Equity Incentive Plan 2013 Equity Incentive Plan 2014 [Member] Equity Incentive Plan 2014 Excel Vessel Bridge Facility [Member] Excel Vessel Bridge Facility Excel Vessels Capesize [Member] Excel vessels capesize Excel Vessels Handymax [Member] Excel vessels Handymax Excel Vessels Kamsarmax [Member] Excel vessels Kamsarmax Excel Vessels [Member] Excel vessels Excel Vessels Panamax [Member] Excel vessels Panamax Executive Officers [Member] Executive Officers Fair Value Of Above Market Acquired Time Charters [Abstract] The entire disclosure for the asset or liability arising from the market value of the time charter assumed from a vessel acquisition or redelivery upon a time charter agreement termination. Fair Value Of Above Market Acquired Time Charters [Text Block] Fair Value of Above Market Acquired Time Charters The asset arising from the market value of the time charter contract assumed from a vessel acquisition. Balance Balance Fair Value Of Above Market Acquired Time Charter Fair value of above market acquired time charter (Note 7) Total Balance First Installment [Member] First Installment Fix Forward Floating Interest Rate For Liability [Member] Fix forward 50% of floating interest rate for HSH Nordbank AG $35,000 facility Flat fee charged per each newbuilding vessel, as commission fee relative to the negotiations with the shipyards on the construction of the Company's contracted newbuilding vessels. Flat Fee Per Vessel Flat fee per vessel The former Chief Executive Officer of the company. Former Ceo [Member] Former CEO Former Director [Member] Company's former Director This element represents the gain arising from insurance claims. Gain from insurance claim Gain from insurance claim (Note 10) Gain On Time Charter Agreement Termination [Abstract] The gross daily charter rate. Gross Daily Charter Rate Gross daily charter rate HSH Nordbank AG 35K [Member] HSH Nordbank AG (Loan agreement dated December 24, 2013) HSH Nordbank AG $35,000 facility Amount of fees related to handling fees at acquisition of property, plant and equipment. Handling Fees Held In Escrow Heron Vessels [Member] Held in escrow for Heron vessels Heron Vessels [Member] Heron vessels Hsh Nordbank Ag2 [Member] HSH Nordbank AG $35,000 facility The bank HSH Nordbank AG. Hsh Nordbank Ag [Member] HSH Nordbank AG (Loan agreement dated October 3, 2011) HSH Nordbank AG $35,000 facility Hull 1338 [Member] Hull 1338 HN 1338 (tbn Star Aries) Hull 1339 [Member] Hull 1339 HN 1339 (tbn Star Taurus) Hull 1342 [Member] Hull 1342 HN 1342 (tbn Star Gemini) Hull 1343 [Member] Hull 1343 HN 1343 (tbn Star Leo) Hull 1371 Financed By Sws Owner [Member] Hull 1371 Financed By SWS Owner Hull 1372 Financed By Sws Owner [Member] Hull 1372 Financed By SWS Owner Hull 5040 Hull 5043 [Member] Hull 5040 and Hull 5043 Hull 5040 [Member] Hull 5040 HN 5040 (tbn Star Aquarius) Hull 5043 [Member] Hull 5043 HN 5043 (tbn Star Pisces) Company's hull and machinery claim. Hull And Machinery Claim [Member] Hull and Machinery Claim Hull NE 196 [Member] Hull NE 196 HN NE 196 (tbn Star Antares) Hull NE 197 [Member] Hull NE 197 HN NE 197 (Star Lutas) Hull NE 198 [Member] Hull NE 198 HN NE 198 (tbn Star Poseidon) Hull No 1371 And Hull No 1372 [Member] Hull 1371 and Hull 1372 Hull No 1371 [Member] Hull 1371 HN 1371 (tbn Star Virgo) Hull No 1372 [Member] Hull 1372 HN 1372 (tbn Star Libra) The maximum amount of Protection and Indemnity (P&I) insurance coverage for pollution, per vessel per incident. Insurance Coverage Maximum Amount Coverage for pollution The company Interchart Shipping. Interchart Shipping [Member] Interchart Shipping Inc. (a) Interchart Shipping Inc. Interest Rate Swap1 [Member] Interest Rate Swap A Interest Rate Swap2 [Member] Interest Rate Swap B Interest Rate Swaps [Member] Interest rate swaps (gain)/loss Interest Rate Swaps The total value of vested and non-vested shares issued during the period and the total amount of stock based compensation amortized. Issuance Of Vested And Non Vested Shares Amortization Stock Based Compensation Value Issuance of vested and non-vested shares and amortization of stock-based compensation, value (Note 13) Kymopolia [Member] Kymopolia Carrying value as of the balance sheet date of obligations incurred through that date and payable for legal services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Legal Fees Accrued Liabilities Legal fees Tabular disclosure of the entity's newbuildings. List Of Newbuildings [Table Text Block] List of Newbuildings Tabular disclosure of the entity's subsidiaries. List Of Subsidiaries [Table Text Block] List of Subsidiaries Tabular disclosure of vessels under commercial and technical management. List Of Vessels Under Commercial And Technical Management [Table Text Block] List of vessels under commercial and technical management by Starbulk S.A. Carrying amount as of the balance sheet date of lubricants' inventory. Lubricants Inventory Current Lubricants Madredeus [Member] Madredeus Maiden Voyage Copy [Member] Maiden Voyage The company Maiden Voyage LLC. Maiden Voyage [Member] Maiden Voyage LLC (f) Maiden Voyage LLC Managed Vessels OceanBulk Shipping [Member] Managed Vessels of Oceanbulk Shipping LLC (e) Managed Vessels of Oceanbulk Shipping LLC Management And Directors [Member] Management and Directors Marto [Member] Marto Mercurial Virgo [Member] Mercurial Virgo Nibc Facility [Member] The "NIBC Facility" Nine Newbuilding Vessels [Member] Nine Newbuilding Vessels Expenditures for compensation for non executive officers.Examples include, but not limited to, Board of Director's attendance fees. Non Executive Directors Compensation Non-executive directors compensation (b) Compensation Number of contracts for construction acquired. Number Contracts For Construction Acquired Number of contracts acquired for vessels construction The number of tranches under the credit facility Number Loan Tranches Number of tranches per loan Oaktree Excel Investors [Member] Oaktree Excel investors Oaktree [Member] Oaktree Obelix [Member] Obelix The company OceanBulk Maritime. Oceanbulk Maritime [Member] Oceanbulk Maritime S.A. (d) Oceanbulk Maritime S.A., or Oceanbulk Oceanbulk [Member] Oceanbulk Commission fee for new building vessels. Other Costs Capitalized Commission fee for new building vessels (e) Other capitalized costs (Note 3) Amount of other financing fees, which may include bank charges, commissions of FFA's and other loan expenses. Other Financing Fees Other finance fees The entire disclosure for other operational gain. Other Operational Gain Text Block Other Operational Gain The entire disclosure for other operational loss. Other Operational Loss [Text Block] Other Operational Loss Amount of extra fees related to acquisition of property, plant and equipment. Other Vessel Acquisition Costs Other expenses capitalized Pantagruel [Member] Pantagruel Pappas Shareholders [Member] Pappas shareholders and Millennia Holdings The payments made by related parties on behalf of reporting entity. Office setup expenses - Oceanbulk Maritime S.A. (d) Payments By Related Parties On Behalf Of Reporting Entity Office setup expenses - Oceanbulk (e) Office setup expenses Shares used for payments of postemployment benefits (such as severance pay and health insurance benefits) recognised during the period. Postemployment benefits are benefits paid to employees after employment but before retirement. Payments For Postemployment Benefits Shares Severance payments,common shares Peloreus 2 [Member] Peloreus Peloreus Financed By Existing Cash [Member] Peloreus- Financed by existing cash Peloreus Financed By Loan Facility [Member] Peloreus - Financed by Deutsche Bank AG loan facility Pendulum [Member] Pendulum The percentage of future proceeds sold to a third party related to the settlement of certain of the commercial claims. Percentage Of Future Proceeds Sold Percentage of future proceeds sold Previous Manning Agent [Member] Rebate from Company's previous manning agent Product Shipping Trading [Member] Product Shipping & Trading S.A. (f) Product Shipping & Trading S.A Primarily represents commissions incurred in the period based upon the sale by related parties of the entity's goods or services, and fees for sales assistance or product enhancements performed by related parties (such as a distributor or value added reseller). Related Parties Commissions Fees Commissions - related parties (Note 3) Renewal Consulting Agreement [Member] Renewal Consulting Agreements The amount of monthly rent. Rent Expense Per Month Rent expense per month The amount received from selling a percentage of interest in future proceeds, related to recovery of commercial claims. Sale Of Future Claims Proceeds Sale of future claims proceeds Second Installment [Member] Second Installment Serenity I [Member] Serenity I Annual lump fee payable to Interchart, as part of the Services Agreement for brokering and commercial services. Services Agreement Annual Lump Fee Remuneration Annual lump sum fee The fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedGrantDateFairValue Grant Date Fair Value The number of equity-based payment instruments that has vested during the reporting period. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Vested In Period Number of shares vested Number of shares vested during the period Shipbuilding Contracts Agreed Extra Costs [Member] Shipbuliding contracts & agreed extra costs The vessel Star Aplha. Star Alpha [Member] Star Alpha (ex A Duckling) Star Alpha (ex A Duckling) - Disposed The vessel Star Aurora. Star Aurora [Member] Star Aurora The vessel Star Beta. Star Beta [Member] Star Beta (ex B Duckling) Star Beta (ex B Duckling) - Disposed Star Big And Star Mega [Member] Star Big and Star Mega The vessel Star Big. Star Big [Member] Star Big Star Big (ex-Big Fish) Star Borealis And Star Polaris [Member] Star Borealis and Star Polaris The vessel Star Borealis. Star Borealis [Member] Star Borealis Star Challenger 1 [Member] Star Challenger The vessel Star Challenger. Star Challenger [Member] Star Challenger The vessel Star Cosmo. Star Cosmo [Member] Star Cosmo The vessel Star Delta. Star Delta [Member] Star Delta (ex F Duckling) Star Delta Star Epsilon And Star Kappa 1 [Member] Star Epsilon And Star Kappa The vessels Star Epsilon and Star Kappa Star Epsilon And Star Kappa [Member] Star Epsilon And Star Kappa (chartered by Ishar Overseas) The vessel Star Epsilon. Star Epsilon [Member] Star Epsilon (ex G Duckling) Star Epsilon Star Fighter 1 [Member] Star Fighter The vessel Star Fighter. Star Fighter [Member] Star Fighter The vessel Star Gamma. Star Gamma [Member] Star Gamma (ex C Duckling) Star Gamma The vessel Star Kappa. Star Kappa [Member] Star Kappa (ex E Duckling) Star Kappa The vessel Star Mega. Star Mega [Member] Star Mega Star Mega (ex-Megalodon) The vessel Star Omicron. Star Omicron [Member] Star Omicron The vessel Star Polaris. Star Polaris [Member] Star Polaris The vessel Star Sigma. Star Sigma [Member] Star Sigma Star Sigma - Disposed Star Sirius2 [Member] Star Sirius StarSiriusStarVega2[Member] Star Sirius and Star Vega Star Sirius Star Vega [Member] Star Sirius and Star Vega The vessel Star Theta. Star Theta [Member] Star Theta (ex J Duckling) Star Theta Star Vega2 [Member] Star Vega The vessel Star Ypsilon. Star Ypsilon [Member] Star Ypsilon Star Ypsilon - Disposed The vessel Star Zeta. Star Zeta [Member] Star Zeta (ex I Duckling) Star Zeta