XML 76 R62.htm IDEA: XBRL DOCUMENT v3.8.0.1
GOODWILL AND INTANGIBLE ASSETS - Schedule of Activity and Balances Related to Goodwill by Reporting Segment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 119,899 $ 118,976
Acquisitions 2,706 923
Goodwill, ending balance 122,605 119,899
Eastern    
Goodwill [Roll Forward]    
Goodwill, beginning balance 17,429 17,429
Acquisitions 1,763 0
Goodwill, ending balance 19,192 17,429
Western    
Goodwill [Roll Forward]    
Goodwill, beginning balance 88,426 87,503
Acquisitions 943 923
Goodwill, ending balance 89,369 88,426
Recycling    
Goodwill [Roll Forward]    
Goodwill, beginning balance 12,315 12,315
Acquisitions 0 0
Goodwill, ending balance 12,315 12,315
Other    
Goodwill [Roll Forward]    
Goodwill, beginning balance 1,729 1,729
Acquisitions 0 0
Goodwill, ending balance $ 1,729 $ 1,729