Derivative Financial Instruments (Details 3) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss)
Loss Reclassified from Accumulated OCI into Income (Effective Portion), included in rent and interest expense during period		$ 900,000
Reclassification of interest rate swap losses included in accumulated other comprehensive loss into earnings in the next 12 months	500,000
Cash flow hedges | Interest rate swaps
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during period	611,000	(956,000)	(424,000)
Cash flow hedges | Interest rate swaps | Rent expenses
Derivative Instruments, Gain (Loss)
Loss Reclassified from Accumulated OCI into Income (Effective Portion), included in rent and interest expense during period		(2,197,000)	(2,237,000)
Cash flow hedges | Interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss)
Loss Reclassified from Accumulated OCI into Income (Effective Portion), included in rent and interest expense during period	$ (560,000)	$ (98,000)