Summary of Significant Accounting Policies - Summary of Plant and Equipment Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2016
Buildings and Improvements | Minimum
Property, Plant and Equipment [Line Items]
Period of assets which are depreciated on straight line basis over their useful lives	20 years
Buildings and Improvements | Maximum
Property, Plant and Equipment [Line Items]
Period of assets which are depreciated on straight line basis over their useful lives	40 years
Machinery and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Period of assets which are depreciated on straight line basis over their useful lives	5 years
Machinery and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Period of assets which are depreciated on straight line basis over their useful lives	12 years
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Period of assets which are depreciated on straight line basis over their useful lives	Life of Lease