Final Capping, Closure and Post-Closure Costs (Tables)

12 Months Ended

Dec. 31, 2015

Asset Retirement Obligation Disclosure [Abstract]

Changes to Accrued Capping, Closure and Post-Closure Liabilities

The changes to accrued final capping, closure and post-closure liabilities are as follows:


	Fiscal Year Ended			Eight Months Ended			Fiscal Year Ended
	December 31, 2015			December 31, 2014			April 30, 2014
Beginning balance	$	39,829		$	44,654		$	43,170
Obligations incurred		1,798			2,169			3,621
Revisions in estimates (1)		(2,030	)		(3,378	)		(3,728	)
Accretion expense		3,370			2,275			3,967
Obligations settled (2)		(1,926	)		(5,891	)		(2,376	)

Ending balance	$	41,041		$	39,829		$	44,654

(1)

The revisions in estimates for final capping, closure and post-closure for fiscal year 2015, transition period 2014 and fiscal year 2014 consist of changes in cost estimates and the timing of final capping and closure events, as well as changes to expansion airspace and tonnage placement assumptions.

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