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SEGMENT REPORTING - Summary of Revenues Attributable to Services Provided by Company (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenue from External Customer [Line Items]
Revenues	$ 163,664	$ 147,455
Collection
Revenue from External Customer [Line Items]
Revenues	83,080	66,475
Disposal
Revenue from External Customer [Line Items]
Revenues	36,054	40,234
Power generation
Revenue from External Customer [Line Items]
Revenues	1,136	1,799
Processing
Revenue from External Customer [Line Items]
Revenues	878	1,420
Solid waste operations
Revenue from External Customer [Line Items]
Revenues	121,148	109,928
Organics
Revenue from External Customer [Line Items]
Revenues	13,596	12,200
Customer solutions
Revenue from External Customer [Line Items]
Revenues	18,154	15,170
Recycling
Revenue from External Customer [Line Items]
Revenues	$ 10,766	$ 10,157

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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