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GOODWILL AND INTANGIBLE ASSETS - Schedule of Activity and Balances Related to Goodwill by Reporting Segment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 118,976 $ 119,170
Acquisitions 923  
Other   (194)
Goodwill, ending balance 119,899 118,976
Eastern    
Goodwill [Roll Forward]    
Goodwill, beginning balance 17,429 17,429
Acquisitions 0  
Other   0
Goodwill, ending balance 17,429 17,429
Western    
Goodwill [Roll Forward]    
Goodwill, beginning balance 87,503 87,697
Acquisitions 923  
Other   (194)
Goodwill, ending balance 88,426 87,503
Recycling    
Goodwill [Roll Forward]    
Goodwill, beginning balance 12,315 12,315
Acquisitions 0  
Other   0
Goodwill, ending balance 12,315 12,315
Other    
Goodwill [Roll Forward]    
Goodwill, beginning balance 1,729 1,729
Acquisitions 0  
Other   0
Goodwill, ending balance $ 1,729 $ 1,729