Derivatives (Derivatives - Fair Value and Designation) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Dec. 29, 2012
Not Designated as Hedging Instrument [Member] | Interest Rate Swaption [Member] | Other Assets [Member]
Derivative Asset, Fair Value, Net [Abstract]
Interest rate swaptions	$ 0	$ 0
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative Liability, Fair Value, Net [Abstract]
Interest rate swaps	934	1,086
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Accrued Liabilities [Member]
Derivative Liability, Fair Value, Net [Abstract]
Interest rate swaps	362	439
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Liabilities [Member]
Derivative Liability, Fair Value, Net [Abstract]
Interest rate swaps	$ 572	$ 647