Derivatives (Summary of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012		Dec. 31, 2011	Dec. 25, 2010
Derivative [Line Items]
Other Comprehensive Income (Loss), Amortization of Unrealized Losses on Dedesignated Derivatives, before Taxes	$ 467		$ 150	$ 0
Derivative, Cash Received on Non-Hedged Instrument	285
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	0		0	(300)
Effective April 1, 2003 through April 1, 2013 [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	5,102	[1]
Fixed Interest Rate	4.54%
Effective July 11, 2010 through May 11, 2013 [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	25,000
Fixed Interest Rate	1.42%
Effective October 3, 2011 through September 1, 2016 [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	10,000
Fixed Interest Rate	1.33%
Effective March 1, 2013 through September 1, 2016 [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	10,000
Fixed Interest Rate	1.62%
Effective June 1, 2013 through September 1, 2016 [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional Amount	5,000
Fixed Interest Rate	1.70%
Dedesignated Hedge [Member]
Derivative [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)			779
Other Comprehensive Income (Loss), Amortization of Unrealized Losses on Dedesignated Derivatives, before Taxes	467		150
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Fixed Interest Rate				2.38%
Notional Amount of Interest Rate Derivatives				25,000
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments				$ 300

[1] Interest rate swap has an amortizing notional amount.