Property, Plant and Equipment

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment

Property, Plant and Equipment

3. Property, Plant and Equipment

	December 31
	2015			2014
Land and improvements	$	32,522		$	26,209
Buildings	67,841			68,046
Machinery, equipment and customer capital	458,975			466,223
Computer hardware and software	41,850			27,158
Furniture and vehicles	10,534			8,570
Construction-in-progress	32,141			29,194
	643,863			625,400
Less accumulated depreciation	(332,844		)	(334,814		)
Net	$	311,019		$	290,586

Depreciation expense for the years ended December 31, 2015, 2014, and 2013  totaled $33.7 million, $28.2 million, and $26.8 million, respectively.