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Credit Facility (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended 9 Months Ended 0 Months Ended
Mar. 21, 2012
Sep. 27, 2013
Revolving Line Of Credit Facility [Member]
Feb. 21, 2012
Revolving Line Of Credit Facility [Member]
Sep. 27, 2013
Term Loan [Member]
Feb. 21, 2012
Term Loan [Member]
Sep. 27, 2013
Revolving Line Of Credit Facility And Term Loan [Member]
Aug. 27, 2013
Revolving Line Of Credit Facility And Term Loan [Member]
Sep. 27, 2013
LIBOR Rate [Member]
Sep. 27, 2013
Base Rate [Member]
Oct. 30, 2013
Subsequent Event [Member]
Term Loan [Member]
Line of Credit Facility [Line Items]                    
Borrowing capacity under credit facility     $ 20.0   $ 30.0          
Credit facility amount outstanding   0   15.0            
Term of debt       5 years   5 years        
Stock repurchase cost of tender offer net of fees and expenses related to tender offer 55.0                  
Additional borrowing capacity             17.0      
Maturity date       Aug. 27, 2018   Aug. 27, 2018        
Additional amount drawn on loan                   7.0
Outstanding balance                   $ 22.0
Margin percentage base rate               1.50% 1.00%