Restructuring Charges (Details 1) (USD $)	3 Months Ended	9 Months Ended				9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012 June 2012 Plan [Member]	Mar. 31, 2012 June 2012 Plan [Member]	Sep. 30, 2012 April 2011 Plan [Member]	Dec. 31, 2010 April 2011 Plan [Member]
Restructuring reserve activity
Restructuring liability at beginning							$ 0
Restructuring and restructuring-related charges, excluding asset impairments and write-offs	245,000	3,384,000	694,000	2,600,000		700,000
Cost paid				2,300,000		700,000
Restructuring liability at ending				$ 300,000		$ 0	$ 0