Summary of Estimated Useful Lives (Detail)	12 Months Ended
	Dec. 31, 2011 Year
Building and Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, minimum useful life	20
Property, plant and equipment, maximum useful life	40
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, minimum useful life	3
Property, plant and equipment, maximum useful life	7
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, minimum useful life	3
Property, plant and equipment, maximum useful life	10