Accrued Final Capping, Closure and Post Closure

3 Months Ended

Mar. 31, 2016

Asset Retirement Obligation Disclosure [Abstract]

Accrued Final Capping, Closure and Post Closure

4.	ACCRUED FINAL CAPPING, CLOSURE AND POST CLOSURE

Accrued final capping, closure and post-closure costs include the current and non-current portion of costs associated with obligations for final capping, closure and post-closure of our landfills. We estimate our future final capping, closure and post-closure costs in order to determine the final capping, closure and post-closure expense per ton of waste placed into each landfill. The anticipated timeframe for paying these costs varies based on the remaining useful life of each landfill, as well as the duration of the post-closure monitoring period. The changes to accrued final capping, closure and post-closure liabilities are as follows:


	Three Months Ended March 31,
	2016			2015
Beginning balance	$	41,041		$	39,829
Obligations incurred		526			441
Accretion expense		886			828
Obligations settled (1)		(198	)		(504	)

Ending balance	$	42,255		$	40,594

(1)	Includes amounts that are being processed through accounts payable as a part of our disbursement cycle.