Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2011 Year
Building and Building Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment minimum estimated useful lives	15
Property, plant and equipment maximum estimated useful lives	30
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment minimum estimated useful lives	3
Property, plant and equipment maximum estimated useful lives	30
Land Use Rights
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful lives	30