XML 17 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2024
Jan. 31, 2025
Jun. 28, 2024
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 000-23211    
Entity Registrant Name CASELLA WASTE SYSTEMS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 03-0338873    
Entity Address, Address Line One 25 Greens Hill Lane    
Entity Address, City or Town Rutland    
Entity Address, State or Province VT    
Entity Address, Postal Zip Code 05701    
City Area Code (802    
Local Phone Number 775-0325    
Title of 12(b) Security Class A common stock, $0.01 par value per share    
Trading Symbol CWST    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Emerging Growth Company false    
Entity Small Business false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 5.6
Documents Incorporated by Reference Part III of this Annual Report on Form 10-K incorporates by reference information from the definitive Proxy Statement for the registrant’s 2025 Annual Meeting of Stockholders or a Form10-K/A to be filed with the Securities and Exchange Commission not later than 120 days after the registrant’s fiscal year ended December 31, 2024    
Entity Central Index Key 0000911177    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Class A Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   62,370,275  
Class B Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   988,200