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SEGMENT REPORTING - Summary of Revenues Attributable to Services Provided by Company (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue from External Customer [Line Items]
Revenues	$ 198,547	$ 172,832	$ 549,670	$ 485,936
Collection
Revenue from External Customer [Line Items]
Revenues	98,966	79,611	274,111	220,650
Disposal
Revenue from External Customer [Line Items]
Revenues	50,552	48,737	134,746	136,217
Power generation
Revenue from External Customer [Line Items]
Revenues	808	920	2,655	4,014
Processing
Revenue from External Customer [Line Items]
Revenues	2,640	2,079	5,426	5,847
Solid waste operations
Revenue from External Customer [Line Items]
Revenues	152,966	131,347	416,938	366,728
Organics
Revenue from External Customer [Line Items]
Revenues	14,166	13,413	42,668	40,259
Customer solutions
Revenue from External Customer [Line Items]
Revenues	20,689	17,195	58,058	48,315
Recycling
Revenue from External Customer [Line Items]
Revenues	$ 10,726	$ 10,877	$ 32,006	$ 30,634

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No definition available.

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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
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-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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