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FAIR VALUE OF FINANCIAL INSTRUMENTS - Recurring Fair Value Measurements (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2023
Dec. 31, 2022
Assets:      
Restricted investment securities - landfill closure $ 4,658 $ 4,658 $ 1,900
Liabilities:      
Derivative Asset, Statement Of Financial Position Extensible Enumeration, Not Disclosed Flag   Interest rate swaps Interest rate swaps
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Assets:      
Interest rate swaps 0 $ 0 $ 0
Total assets 1,928 1,928 1,900
Liabilities:      
Interest rate swaps 0 0  
Contingent consideration - acquisition     0
Total 0 0  
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Landfill      
Assets:      
Restricted investment securities - landfill closure 1,928 1,928 1,900
Recurring | Significant Other Observable Inputs (Level 2)      
Assets:      
Interest rate swaps 16,357 16,357 11,806
Total assets 16,357 16,357 11,806
Liabilities:      
Interest rate swaps 1,886 1,886  
Contingent consideration - acquisition     0
Total 1,886 1,886  
Recurring | Significant Other Observable Inputs (Level 2) | Landfill      
Assets:      
Restricted investment securities - landfill closure 0 0 0
Recurring | Significant Unobservable Inputs (Level 3)      
Assets:      
Interest rate swaps 0 0 0
Total assets 0 0 0
Liabilities:      
Interest rate swaps 0 0  
Contingent consideration - acquisition     965
Total 0 0  
Contingent consideration, decrease for reversal of contingency 376 965  
Recurring | Significant Unobservable Inputs (Level 3) | Landfill      
Assets:      
Restricted investment securities - landfill closure $ 0 $ 0 $ 0