v2.4.0.6
Document And Entity Information
6 Months Ended
Jun. 30, 2013
Jul. 31, 2013
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2  
Trading Symbol GLDD  
Entity Registrant Name Great Lakes Dredge & Dock CORP  
Entity Central Index Key 0001372020  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   59,472,566