Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment
Land	$ 27,184	$ 21,913
Buildings and improvements	220,563	185,175
Manufacturing equipment	350,664	298,529
Canisters and cylinders	107,108	90,790
Molds	75,482	72,089
Office furniture and equipment	157,770	142,818
Construction in progress	63,197	69,437
Total property, plant and equipment	1,001,968	880,751
Less accumulated depreciation	522,424	461,222
Property, plant and equipment, net	$ 479,544	$ 419,529	$ 359,523
Minimum | Building and Building Improvements
Property, Plant and Equipment
Estimated useful lives in years	5 years	5 years
Minimum | Manufacturing Equipment
Property, Plant and Equipment
Estimated useful lives in years	5 years	5 years
Minimum | Canisters and cylinders
Property, Plant and Equipment
Estimated useful lives in years	3 years	3 years
Minimum | Molds
Property, Plant and Equipment
Estimated useful lives in years	3 years	3 years
Minimum | Office Furniture and Equipment
Property, Plant and Equipment
Estimated useful lives in years	3 years	3 years
Maximum | Building and Building Improvements
Property, Plant and Equipment
Estimated useful lives in years	35 years	35 years
Maximum | Manufacturing Equipment
Property, Plant and Equipment
Estimated useful lives in years	10 years	10 years
Maximum | Canisters and cylinders
Property, Plant and Equipment
Estimated useful lives in years	12 years	12 years
Maximum | Molds
Property, Plant and Equipment
Estimated useful lives in years	5 years	5 years
Maximum | Office Furniture and Equipment
Property, Plant and Equipment
Estimated useful lives in years	8 years	8 years