COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments under Non-Cancellable Operating Leases

Future minimum rental payments under non-cancellable operating leases, which include landfill operating leases, are as follows:

Estimated Future Minimum Lease Payments as of December 31, 2016
2017	$	18,269
2018	16,270
2019	15,228
2020	12,407
2021	9,173
Thereafter	53,186
Total minimum lease payments	$	124,533

Schedule of Environmental Liability Associated with Potsdam

A summary of the changes to the environmental remediation liability associated with the Potsdam environmental remediation liability follows:

	Fiscal Year Ended December 31,
	2016			2015
Beginning balance	$	5,221		$	5,142
Accretion expense	—			79
Payments	(255		)	—
Revisions in estimates (1)	900			—
Ending balance	$	5,866		$	5,221

(1) The revisions in estimates is due to changes to our estimated costs to complete the remediation. See Note 15, Other Items and Charges for disclosure over environmental remediation charges.

Schedule of Total Expected Environmental Remediation Payments for Succeeding Year

The total expected environmental remediation payments, in today’s dollars, for each of the five succeeding fiscal years and the aggregate amount thereafter are as follows:

Estimated Future Environmental Remediation Payments as of December 31, 2016
2017	$	120
2018	2,892
2019	1,386
2020	51
2021	33
Thereafter	993
Total	$	5,475

Reconciliation of Expected Aggregate Non-inflated, Undiscounted Environmental Remediation Liability to Amount Recognized in Statement of Financial Position

A reconciliation of the expected aggregate non-inflated, undiscounted environmental remediation liability to the amount recognized in the statement of financial position is as follows:

Undiscounted liability	$	5,475
Plus inflation, net	391
Liability balance - December 31, 2016	$	5,866