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SEGMENT REPORTING - Summary of Revenues Attributable to Services Provided by Company (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue from External Customer [Line Items]
Revenues	$ 187,459	$ 165,649	$ 351,123	$ 313,104
Collection
Revenue from External Customer [Line Items]
Revenues	92,066	74,564	175,145	141,039
Disposal
Revenue from External Customer [Line Items]
Revenues	48,139	47,246	84,194	87,480
Power generation
Revenue from External Customer [Line Items]
Revenues	711	1,295	1,847	3,094
Processing
Revenue from External Customer [Line Items]
Revenues	1,908	2,347	2,786	3,768
Solid waste operations
Revenue from External Customer [Line Items]
Revenues	142,824	125,452	263,972	235,381
Organics
Revenue from External Customer [Line Items]
Revenues	14,905	14,647	28,501	26,847
Customer solutions
Revenue from External Customer [Line Items]
Revenues	19,216	15,950	37,370	31,119
Recycling
Revenue from External Customer [Line Items]
Revenues	$ 10,514	$ 9,600	$ 21,280	$ 19,757

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+ 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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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