Property, Plant and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment

PROPERTY, PLANT AND EQUIPMENT

Property, plant, and equipment at December 31, 2017 and 2016 consists of the following:

(In thousands)	2017		2016		Estimated useful lives in years
Land	$	16,795	$	15,903
Buildings and improvements	174,615		155,769		5-35
Manufacturing equipment	274,723		248,201		5-10
Canisters and cylinders	77,325		65,100		3-12
Molds	80,198		76,782		3-5
Office furniture and equipment	121,345		107,194		3-8
Construction in progress	42,288		40,136
	787,289		709,085
Less accumulated depreciation	427,766		387,523
	$	359,523	$	321,562

The table below sets forth the depreciation expense for the years ended December 31, 2017, 2016 and 2015:

(In thousands)	2017		2016		2015
Depreciation expense	$	58,208	$	55,623	$	54,305