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Insider Trading Arrangements
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2023
Trading Arrangements, by Individual    
Material Terms of Trading Arrangement  
Name (Title)Action Taken (Date of Action)Type of Trading ArrangementNature of Trading ArrangementDuration of Trading ArrangementAggregate Number of Securities
John W. Casella
(Chairman of the Board of Directors, Chief Executive Officer and Secretary)
Adoption (08/22/2023)
Durable Rule 10b5-1 trading arrangement for sell-to-cover transactions relating to certain equity awards that have or may be grantedSaleUntil final settlement of any covered RSU or PSU
Indeterminable(1)
Edmond "Ned" R. Coletta
(President and Chief Financial Officer)
Adoption (08/02/2023)
Durable Rule 10b5-1 trading arrangement for sell-to-cover transactions relating to certain equity awards that have or may be grantedSaleUntil final settlement of any covered RSU or PSU
Indeterminable(1)
Shelley E. Sayward
(Senior Vice President and General Counsel)
Adoption (08/02/2023)
Durable Rule 10b5-1 trading arrangement for sell-to-cover transactions relating to certain equity awards that have or may be grantedSaleUntil final settlement of any covered RSU or PSU
Indeterminable(1)
Sean M. Steves
(Senior Vice President and Chief Operating Officer of Solid Waste Operations)
Adoption (08/02/2023)
Durable Rule 10b5-1 trading arrangement for sell-to-cover transactions relating to certain equity awards that have or may be granted
SaleUntil final settlement of any covered RSU or PSU
Indeterminable(1)
Kevin J. Drohan
(Vice President and Chief Accounting Officer)
Adoption (08/02/2023)
Durable Rule 10b5-1 trading arrangement for sell-to-cover transactions relating to certain equity awards that have or may be granted
SaleUntil final settlement of any covered RSU or PSU
Indeterminable(1)
Paul J. Ligon
(Senior Vice President Sustainable Growth)
Adoption (08/02/2023)
Durable Rule 10b5-1 trading arrangement for sell-to-cover transactions relating to certain equity awards that have or may be granted
SaleUntil final settlement of any covered RSU or PSU
Indeterminable(1)
Douglas R. Casella
(Vice Chairman)
Adoption (08/20/2023)
Durable Rule 10b5-1 trading arrangement for sell-to-cover transactions relating to certain equity awards that have or may be granted
SaleUntil final settlement of any covered RSU or PSU
Indeterminable(1)
Non-Rule 10b5-1 Arrangement Adopted false  
Rule 10b5-1 Arrangement Terminated false  
Non-Rule 10b5-1 Arrangement Terminated false  
John W. Casella [Member]    
Trading Arrangements, by Individual    
Name John W. Casella  
Title Chairman of the Board of Directors, Chief Executive Officer and Secretary  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date 08/22/2023  
Edmond "Ned" R. Coletta [Member]    
Trading Arrangements, by Individual    
Name Edmond "Ned" R. Coletta  
Title President and Chief Financial Officer  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date 08/02/2023  
Shelley E. Sayward [Member]    
Trading Arrangements, by Individual    
Name Shelley E. Sayward  
Title Senior Vice President and General Counsel  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date 08/02/2023  
Sean M. Steves [Member]    
Trading Arrangements, by Individual    
Name Sean M. Steves  
Title Senior Vice President and Chief Operating Officer of Solid Waste Operations  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date 08/02/2023  
Kevin J. Drohan [Member]    
Trading Arrangements, by Individual    
Name Kevin J. Drohan  
Title Vice President and Chief Accounting Officer  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date 08/02/2023  
Paul J. Ligon [Member]    
Trading Arrangements, by Individual    
Name Paul J. Ligon  
Title Senior Vice President Sustainable Growth  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date 08/02/2023  
Douglas R. Casella [Member]    
Trading Arrangements, by Individual    
Name Douglas R. Casella  
Title Vice Chairman  
Rule 10b5-1 Arrangement Adopted true  
Adoption Date 08/20/2023