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BUSINESS COMBINATIONS - Summary of Purchase Price Paid for Acquisitions (Detail) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Purchase Price:      
Cash used in acquisitions, net of cash acquired $ 73,963 $ 153,112  
Allocated as follows:      
Excess purchase price allocated to goodwill 272,442   $ 232,860
Waste Collection Acquisitions      
Purchase Price:      
Cash used in acquisitions, net of cash acquired 72,731 150,364  
Other non-cash consideration 1,220 0  
Holdbacks to sellers and contingent consideration 4,112 4,865  
Total consideration 78,063 155,229  
Allocated as follows:      
Current assets 7,599 7,260  
Land 3,141 803  
Finance lease right-of-use-assets 0 31,467  
Buildings and improvements 8,566 8,468  
Machinery and equipment 10,296 42,458  
Operating lease right-of-use assets 405 6,500  
Other non-current assets 40 0  
Current liabilities (3,721) (5,952)  
Other long-term liabilities (123) 0  
Financing lease liabilities, less current portion 0 (10,535)  
Operating lease liabilities, less current portion (282) 0  
Fair value of assets acquired and liabilities assumed 39,372 122,228  
Excess purchase price allocated to goodwill 38,691 33,001  
Waste Collection Acquisitions | Trade Names      
Allocated as follows:      
Intangible assets: 0 8,350  
Waste Collection Acquisitions | Covenants not-to-compete      
Allocated as follows:      
Intangible assets: 2,034 3,069  
Waste Collection Acquisitions | Customer Relationships      
Allocated as follows:      
Intangible assets: $ 11,417 $ 30,340