XML 15 R1.htm IDEA: XBRL DOCUMENT v3.22.4
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2022
Feb. 14, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Trading Symbol GLDD    
Entity Registrant Name Great Lakes Dredge & Dock Corporation    
Entity Central Index Key 0001372020    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Address, Address Line One 9811 Katy Freeway, Suite 1200    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity File Number 001-33225    
Entity Tax Identification Number 20-5336063    
City Area Code 346    
Local Phone Number 359-1010    
Entity Address, Postal Zip Code 77024    
Entity Interactive Data Current Yes    
Title of 12(b) Security Common Stock, (Par Value $0.0001)    
Security Exchange Name NASDAQ    
Entity Incorporation, State or Country Code DE    
Document Annual Report true    
Document Transition Report false    
Entity Common Stock, Shares Outstanding   66,187,623  
Entity Public Float     $ 848,574,365
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Auditor Firm ID 34    
Auditor Name Deloitte & Touche LLP    
Auditor Location Chicago, Illinois    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

 

Part of 10-K

 

Documents Incorporated by Reference

Part III

 

Portions of the Proxy Statement to be filed with the Securities and Exchange Commission in connection with the 2023 Annual Meeting of Stockholders.