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Document And Entity Information
 6 Months Ended
Jun. 30, 2013
Document And Entity Information [Abstract]  
Document Type 6-K
Document Period End Date Jun. 30, 2013
Amendment Flag false
Enity Registrant Name Star Bulk Carriers Corp.
Entity Central Index Key 0001386716
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Current Fiscal Year End Date --12-31
Entity Filer Category Accelerated Filer
Entity Well Known Seasoned Issuer No
Entity Common Stock Shares Outstanding 5,412,810
Document Fiscal Year Focus 2013
Document Fiscal Period Focus Q2