Description of the Business and Summary of Significant Accounting Policies (Details 2)	12 Months Ended
	Dec. 31, 2012 Y
Machinery and equipment
Estimated useful lives of the assets
Useful Life, Minimum (in years)	3
Useful Life, Maximum (in years)	15
Transportation equipment
Estimated useful lives of the assets
Useful Life, Minimum (in years)	3
Useful Life, Maximum (in years)	8
Furniture and fixtures
Estimated useful lives of the assets
Useful Life, Minimum (in years)	5
Useful Life, Maximum (in years)	10
Buildings and improvements
Estimated useful lives of the assets
Useful Life, Minimum (in years)	15
Useful Life, Maximum (in years)	40