Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2012
Building and improvements [Member] | Minimum [Member]
Estimated Useful Life Of Property Plant And Equipment [Abstract]
Estimated useful lives of property, plant and equipment	2
Building and improvements [Member] | Maximum [Member]
Estimated Useful Life Of Property Plant And Equipment [Abstract]
Estimated useful lives of property, plant and equipment	40
Computer software and equipment [Member] | Minimum [Member]
Estimated Useful Life Of Property Plant And Equipment [Abstract]
Estimated useful lives of property, plant and equipment	1
Computer software and equipment [Member] | Maximum [Member]
Estimated Useful Life Of Property Plant And Equipment [Abstract]
Estimated useful lives of property, plant and equipment	5
Other machinery and equipment [Member] | Minimum [Member]
Estimated Useful Life Of Property Plant And Equipment [Abstract]
Estimated useful lives of property, plant and equipment	3
Other machinery and equipment [Member] | Maximum [Member]
Estimated Useful Life Of Property Plant And Equipment [Abstract]
Estimated useful lives of property, plant and equipment	10