Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment at December 31, 2020 and 2019 consists of the following:

(In thousands)	2020		2019		Estimated useful lives in years
Land	$	23,901	$	27,184
Buildings and improvements	238,586		220,563		5-35
Manufacturing equipment	365,511		350,664		5-10
Canisters and cylinders	120,113		107,108		3-12
Molds	76,283		75,482		3-5
Office furniture and equipment	165,950		157,770		3-8
Construction in progress	109,280		63,197
Total property, plant and equipment	1,099,624		1,001,968
Less accumulated depreciation	574,257		522,424
Property, plant and equipment, net	$	525,367	$	479,544

Depreciation Expense

The table below sets forth the depreciation expense for the years ended December 31, 2020, 2019 and 2018:

(In thousands)	2020		2019		2018
Depreciation expense	$	83,430	$	74,975	$	65,116