PROPERTY, PLANT AND EQUIPMENT

12 Months Ended

Dec. 31, 2016

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT

A summary of property, plant and equipment is as follows:

	December 31,
	2016			2015
Land	$	24,517		$	24,161
Landfills	570,464			536,577
Landfill operating lease contracts	133,239			125,991
Buildings and improvements	143,036			140,046
Machinery and equipment	132,748			131,384
Rolling stock	133,840			139,557
Containers	97,744			94,302
	1,235,588			1,192,018
Less: accumulated depreciation and amortization	(837,122		)	(789,766		)
	$	398,466		$	402,252

Depreciation expense for fiscal year 2016, fiscal year 2015, transition period 2014 and fiscal year 2014 was $33,186, $33,168, $21,599 and $33,094, respectively. Landfill amortization expense for fiscal year 2016, fiscal year 2015, transition period 2014 and fiscal year 2014 was $26,529, $26,969, $17,912 and $24,689, respectively. Depletion expense on landfill operating lease contracts for fiscal year 2016, fiscal year 2015, transition period 2014 and fiscal year 2014 was $9,295, $9,428, $7,799 and $9,948, respectively, and was recorded in cost of operations.