Property Plant Equipment and Mineral Rights and Reserves (Details 1)	12 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2010 years
Building and improvements [Member]
Range of useful lives to depreciate plant and equipment
Range of useful lives to depreciate plant and equipment, minimum	3
Range of useful lives to depreciate plant and equipment, maximum		50
Machinery and equipment [Member]
Range of useful lives to depreciate plant and equipment
Range of useful lives to depreciate plant and equipment, minimum	1
Range of useful lives to depreciate plant and equipment, maximum		25