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OTHER ITEMS AND CHARGES - Charges Associated with Closure of Southbridge Landfill (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Site Contingency [Line Items]      
Project development charge $ 0 $ 311 $ 0
Gain (loss) on contract termination   2,100  
Landfill closure project charge 74 16,179 63,526
Southbridge Landfill closure charge, net 2,709 8,054 65,183
Southbridge Landfill      
Site Contingency [Line Items]      
Asset impairment charge 0 0 47,999
Project development charge 0 0 9,149
Environmental remediation charge 0 0 6,379
Gain (loss) on contract termination 0 8,724 0
Landfill closure project charge 0 6,012 0
Charlton settlement charge 0 1,216 0
Legal and transaction costs 2,709 2,102 1,656
Recovery on insurance settlement 0 (10,000) 0
Southbridge Landfill closure charge, net $ 2,709 $ 8,054 $ 65,183