Credit Facility (Narrative) (Details) (USD $)	12 Months Ended					12 Months Ended
	Dec. 27, 2013	Oct. 15, 2013	Dec. 28, 2012	Mar. 21, 2012	Feb. 21, 2012	Dec. 27, 2013 Base Rate [Member]	Dec. 27, 2013 London Interbank Offered Rate (LIBOR) [Member]	Dec. 27, 2013 Revolving line of credit facility [Member]	Dec. 28, 2012 Revolving line of credit facility [Member]	Feb. 21, 2012 Revolving line of credit facility [Member]	Dec. 27, 2013 Term Loan [Member]	Dec. 28, 2012 Term Loan [Member]	Feb. 21, 2012 Term Loan [Member]	Aug. 27, 2013 Revolving Line Of Credit Facility And Term Loan [Member]
Line of Credit Facility [Line Items]
Borrowing capacity under credit facility										$ 20,000,000			$ 30,000,000
Credit facility amount outstanding									0			25,000,000
Outstanding balance								0			19,000,000
Interest rate per annum	1.67%
Margin percentage base rate						1.50%	0.75%
Issuance costs					600,000
Prepaid mandatory principal amortization	7,000,000
Additional amount drawn on loan	4,000,000
Mandatory principal amortization	0
Stock repurchase cost of tender offer net of fees and expenses related to tender offer	7,170,000	6,900,000	55,587,000	55,000,000
Additional borrowing capacity														$ 17,000,000