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RELATED PARTY TRANSACTIONS (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Apr. 30, 1994
Lease
Related Party Transaction [Line Items]        
Total services purchased $ 3,421 $ 3,377 $ 4,024  
Outstanding accounts payable 32 30    
Number of leases | Lease       2
Total expense charged to operations under lease agreement 349 360 371  
Accrued costs associated with post-closure obligations 73,075 62,290 44,207  
Landfills        
Related Party Transaction [Line Items]        
Landfill post-closure cost 14 27 10  
Accrued costs associated with post-closure obligations 48 60    
CCI        
Related Party Transaction [Line Items]        
Revenue from related party 156 $ 237 $ 307  
Related Party        
Related Party Transaction [Line Items]        
Leases monthly payments $ 28