Derivative Financial Instruments (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Derivative Financial Instruments [Abstract]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	$ (2,500,000)	$ 4,100,000
Notional amount of receive-variable/pay-fixed interest rate swaps	250,000,000
Interest rate swaps, higher remaining maturity range	August 2017
Net AOCI balance	(50,800,000)	2,800,000
Derivative Liabilities Non current	$ (55,064,000)	$ (39,174,000)