Derivative Financial Instruments (Balance Sheet Location) (Details) (USD $)										12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010	Dec. 31, 2011 Interest Rate Swap [Member] Accounts Payable and Accrued Expenses [Member]	Jan. 01, 2011 Interest Rate Swap [Member] Accounts Payable and Accrued Expenses [Member]	Jan. 02, 2010 Interest Rate Swap [Member] Accounts Payable and Accrued Expenses [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Other Long-term Liabilities [Member]	Jan. 01, 2011 Interest Rate Swap [Member] Other Long-term Liabilities [Member]	Jan. 02, 2010 Interest Rate Swap [Member] Other Long-term Liabilities [Member]	Dec. 31, 2011 Diesel Fuel Swap [Member]	Dec. 31, 2011 Diesel Fuel Swap [Member] Accounts Payable and Accrued Expenses [Member]	Jan. 01, 2011 Diesel Fuel Swap [Member] Accounts Payable and Accrued Expenses [Member]	Jan. 02, 2010 Diesel Fuel Swap [Member] Accounts Payable and Accrued Expenses [Member]	Dec. 31, 2011 Diesel Fuel Swap [Member] Prepaid Expenses and Other Current Assets [Member]	Jan. 01, 2011 Diesel Fuel Swap [Member] Prepaid Expenses and Other Current Assets [Member]	Jan. 02, 2010 Diesel Fuel Swap [Member] Prepaid Expenses and Other Current Assets [Member]	Dec. 31, 2011 Cash Flow Hedging [Member] Interest Rate Swap [Member]
Notional Amount of Derivatives [Abstract]
Notional Amount of Derivatives																	$ 50,000,000
Diesel Fuel Risk [Abstract]
Expected Hedging Percentage Of Diesel Fuel Requirements For Next Twelve Months										50.00%
Price Risk Cash Flow Hedges [Abstract]
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months										100,000
Derivative, Fair Value, Net [Abstract]
Derivative, Fair Value, Net	$ (91,000)	$ (630,000)	$ (2,548,000)	$ 0	$ (907,000)	$ (1,922,000)	$ 0	$ 0	$ (626,000)		$ (256,000)	$ 0	$ 0	$ 165,000	$ 277,000	$ 0