Summary of Significant Accounting Policies (Details 2)	12 Months Ended
	Dec. 31, 2012
Patents [Member] | Maximum [Member]
Weighted-average remaining amortization period in years	17 years
Patents [Member] | Minimum [Member]
Weighted-average remaining amortization period in years	5 years
Customer Contracts [Member]
Weighted-average remaining amortization period in years	5 years
Copyrights [Member]
Weighted-average remaining amortization period in years	5 years
Software [Member]
Weighted-average remaining amortization period in years	7 years
Brand Names [Member]
Weighted-average remaining amortization period in years	10 years