Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2011 Y
Buildings and improvements [Member]
Estimated useful lives of property, plant and equipment
Estimated useful lives of property, plant and equipment, Minimum	2
Estimated useful lives of property, plant and equipment, Maximum	40
Machinery and equipment [Member]
Estimated useful lives of property, plant and equipment
Estimated useful lives of property, plant and equipment, Minimum	1
Estimated useful lives of property, plant and equipment, Maximum	15