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BUSINESS COMBINATIONS - Summary of Purchase Price Paid for Acquisitions (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Purchase Price:      
Cash used in acquisitions, net of cash acquired $ 49,757 $ 4,568  
Allocated as follows:      
Excess purchase price allocated to goodwill 258,414   $ 232,860
Waste Collection Acquisitions      
Purchase Price:      
Cash used in acquisitions, net of cash acquired 49,747 3,465  
Holdbacks 3,707 385  
Total consideration 53,454 3,850  
Allocated as follows:      
Current assets 7,584 0  
Land 1,940 0  
Buildings and improvements 5,078 0  
Equipment 6,655 1,254  
Operating lease right-of-use assets 405 0  
Current liabilities (3,573) (76)  
Operating lease liabilities, less current portion (282) 0  
Fair value of assets acquired and liabilities assumed 28,787 2,463  
Excess purchase price allocated to goodwill 24,667 1,387  
Waste Collection Acquisitions | Covenants not-to-compete      
Allocated as follows:      
Intangible assets: 1,343 331  
Waste Collection Acquisitions | Customer Relationships      
Allocated as follows:      
Intangible assets: $ 9,637 $ 954