Property, Plant and Equipment, Net (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,487,786	$ 3,037,361
Accumulated depreciation	(1,997,914)	(1,880,409)
Property, plant and equipment, net	1,489,872	1,156,952
Depreciation expense	150,500	129,800	$ 129,000
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	74,268	48,468
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	445,178	365,406
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,833,214	2,505,459
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 135,126	$ 118,028