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Landfill Accounting (Reconciliation of Final Capping, Closure and Post-Closure Liability Balance) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Landfill Accounting [Abstract]
Final capping, closure and post-closure liability at the beginning of the period	$ 251,782
Liabilities incurred	11,263
Accretion expense associated with landfill obligations	7,063	$ 6,386
Closure payments	(334)
Assumption of closure liabilities from acquisitions	8,707
Foreign currency translation adjustment	1,614
Final capping, closure and post-closure liability at the end of the period	$ 280,095

X

- 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

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-Publisher FASB
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-Topic 410
-SubTopic 20
-Section 50
-Paragraph 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

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-Name Accounting Standards Codification
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-SubTopic 20
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No definition available.

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- Definition

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

+ References

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-Publisher FASB
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Amount of asset retirement obligations incurred during the period.

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- Definition

Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.

+ References

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Asset retirement obligation assumption of closure liabilities from acquisitions.

+ References

No definition available.

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