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CLOSURE AND POST-CLOSURE LIABILITIES - Changes in Post-Closure Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Changes to post-closure liabilities
Balance at the beginning of the period	$ 129,788	$ 118,600
Liabilities assumed in acquisitions		11,421
Measurement period adjustments from prior period acquisitions	420
New asset retirement obligations	3,839	2,118
Accretion	10,565	9,558
Changes in estimates recorded to consolidated statement of operations	114	(225)
Changes in estimates recorded to consolidated balance sheet	(3,504)	4,737
Environmental expenditures	(6,165)	(15,676)
Currency translation and other	271	(745)
Balance at the end of the period	135,328	129,788
Landfill Retirement Liability
Changes to post-closure liabilities
Balance at the beginning of the period	59,400	59,443
Liabilities assumed in acquisitions		0
Measurement period adjustments from prior period acquisitions	0
New asset retirement obligations	3,839	2,118
Accretion	5,013	5,069
Changes in estimates recorded to consolidated statement of operations	446	70
Changes in estimates recorded to consolidated balance sheet	(4,410)	4,335
Environmental expenditures	(4,719)	(11,210)
Currency translation and other	194	(425)
Balance at the end of the period	59,763	59,400
Non-Landfill Retirement Liability
Changes to post-closure liabilities
Balance at the beginning of the period	70,388	59,157
Liabilities assumed in acquisitions		11,421
Measurement period adjustments from prior period acquisitions	420
New asset retirement obligations	0	0
Accretion	5,552	4,489
Changes in estimates recorded to consolidated statement of operations	(332)	(295)
Changes in estimates recorded to consolidated balance sheet	906	402
Environmental expenditures	(1,446)	(4,466)
Currency translation and other	77	(320)
Balance at the end of the period	$ 75,565	$ 70,388

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- Definition

Represents the amount of change in the asset retirement obligation, during the current period for other changes in estimates recorded in the balance sheet.

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No definition available.

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- Definition

The amount of change in the asset retirement obligation, during the current period, for changes in estimates recorded in the statement of income.

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No definition available.

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Asset Retirement Obligation, Liabilities Assumed in Acquisition

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Asset Retirement Obligation, Measurement Period Adjustments From Prior Period Acquisitions

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- Definition

Asset Retirement Obligation, Payments

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- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481999/410-20-25-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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- Definition

Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481879/410-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
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- Definition

Amount of foreign currency translation gain (loss) which decreases (increases) asset retirement obligations.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
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- Definition

Amount of asset retirement obligations incurred during the period.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 410
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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