Summary of Significant Accounting Policies (Details 3)	12 Months Ended
	Dec. 31, 2012 item
Goodwill and other intangible assets
Number of reporting units	1
Finite lived intangible assets
Estimated useful lives	11 years 3 months 18 days
Distribution network | Minimum
Finite lived intangible assets
Estimated useful lives	15 years
Distribution network | Maximum
Finite lived intangible assets
Estimated useful lives	20 years
Trademarks | Minimum
Finite lived intangible assets
Estimated useful lives	7 years
Trademarks | Maximum
Finite lived intangible assets
Estimated useful lives	10 years
Patents | Minimum
Finite lived intangible assets
Estimated useful lives	7 years
Patents | Maximum
Finite lived intangible assets
Estimated useful lives	20 years
Noncompete agreements
Finite lived intangible assets
Estimated useful lives	5 years