XML 36 R24.htm IDEA: XBRL DOCUMENT
v3.8.0.1

ACCRUED FINAL CAPPING, CLOSURE AND POST CLOSURE (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2017
Asset Retirement Obligation Disclosure [Abstract] |
Summary of Changes to Accrued Capping, Closure and Post-Closure Liabilities | A summary of the changes to accrued final capping, closure and post-closure liabilities follows:
| Nine Months Ended September 30,
| 2017 |  | 2016
Beginning balance | $ | 44,207 |  |  | $ | 41,041 |
Obligations incurred | 2,187 |  |  | 1,828 |
Revisions in estimates (1) | 9,598 |  |  | (56 | )
Accretion expense | 3,164 |  |  | 2,688 |
Obligations settled (2) | (586 | ) |  | (601 | )
Ending balance | $ | 58,570 |  |  | $ | 44,900 |
(1) | Relates to changes in estimates and assumptions concerning anticipated waste flow, cost and timing of future final capping, closure and post-closure activities at certain landfills, including the Town of Southbridge, Massachusetts ("Town") Landfill ("Southbridge Landfill"). See Note 7, Commitments and Contingencies and Note 10, Other Items and Charges for disclosure regarding the matter.
(2) | Includes amounts that are being processed through accounts payable as a part of our disbursements cycle.

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration