Debt and Credit Arrangements (Details 3) (USD $)	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012	Dec. 25, 2011
Debt and Credit Arrangements
Weighted average interest rate for credit facility borrowings, including the impact of interest rate swaps	1.40%	1.30%	1.90%
Interest paid	$ 2,000,000	$ 967,000	$ 1,600,000
Interest rate swap
Debt and Credit Arrangements
Amount of Gain or (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	(32,000)	(72,000)	165,000
Interest rate swap liabilities	76,000
Interest expense | Interest rate swap
Debt and Credit Arrangements
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(501,000)	(150,000)	(341,000)
Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)			65,000
Portion of derivative liability that would be reclassified into earnings	$ 17,000
Portion of derivative liability that would be reclassified into earnings	12 months