Description of Business and Summary of Significant Accounting Policies - Depreciation of Property, Plant and Equipment, Including Capital Leases is Provided Using Straight-Line Method Over Estimated Useful Life of Asset (Detail)	12 Months Ended
	Dec. 31, 2017
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	45 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	2 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years
Capital Lease [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	Life of lease