Basis of Presentation - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2016 Segment
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Operating segments	4
Eastern Region [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Operating segments	1
Western Region [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Operating segments	1
Recycling [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Operating segments	1
Other [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Operating segments	1