Credit Facility (Details Textuals) (USD $)	3 Months Ended		9 Months Ended
	Sep. 24, 2013	Sep. 25, 2012	Sep. 24, 2013	Sep. 25, 2012	Dec. 25, 2012
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 250,000,000		$ 250,000,000
Line of Credit Facility, Expiration Date			Nov. 30, 2017
Line of Credit Facility, Amount Outstanding	0		0		0
Commitment fees incurred	100,000	100,000	200,000	300,000
Accrued interest to the commitment fees	$ 100,000		$ 100,000		$ 100,000
Line of Credit Facility, Covenant Compliance			all