Debt (Details) (USD $) In Millions, unless otherwise specified			12 Months Ended	9 Months Ended
	Sep. 29, 2012	Dec. 31, 2011	Dec. 31, 2011 Credit Facility, Wells Fargo Bank [Member]	Sep. 29, 2012 Amended Credit Facility, Wells Fargo Bank [Member]	Apr. 23, 2012 Amended Credit Facility, Wells Fargo Bank [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity					$ 20.0
Maturity date of the credit facility			Jul. 01, 2012
Amended maturity date of the credit facility				Apr. 23, 2015
Maximum borrowing capacity					50.0
Adjusted LIBO Rate basis (in hundredths)				1.25%
Adjusted Base Rate - Daily One-Month LIBO Rate basis (in hundredths)				1.50%
Available remaining borrowing capacity			20.0	20.0
Outstanding letters of credit			0	0
Capital Lease Obligations [Abstract]
Outstanding capital lease obligations	0.1	0.3
Capital lease obligations included in other current liabilities	0.1	0.2
Capital lease obligations included in other long-term liabilities	$ 0	$ 0.1