Fair Value Measurements Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified		12 Months Ended					12 Months Ended
	Sep. 30, 2008 Senior Notes, 6.20% [Member]	Dec. 30, 2012 Senior Notes, 6.20% [Member] Interest Rate Swap [Member]	Jan. 01, 2012 Senior Notes, 6.20% [Member] Interest Rate Swap [Member]	Jan. 02, 2011 Senior Notes, 6.20% [Member] Interest Rate Swap [Member]	Apr. 04, 2010 Senior Notes, 6.20% [Member] Interest Rate Swap [Member]	Sep. 30, 2008 Senior Notes, 6.25% [Member]	Jan. 02, 2011 Senior Notes, 6.25% [Member] Interest Rate Swap [Member]	Jul. 04, 2010 Senior Notes, 6.25% [Member] Interest Rate Swap [Member]	Jan. 03, 2010 Senior Notes [Member] Interest Rate Swap [Member]	Dec. 30, 2012 Swap [Member] Fair Value, Inputs, Level 2 [Member] Estimate of Fair Value, Fair Value Disclosure [Member]		Jan. 01, 2012 Swap [Member] Fair Value, Inputs, Level 2 [Member] Estimate of Fair Value, Fair Value Disclosure [Member]		Dec. 30, 2012 Swap [Member] Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]		Jan. 01, 2012 Swap [Member] Fair Value, Inputs, Level 2 [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member]
Derivatives, Fair Value [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.20%					6.25%
Notional amount of interest rate swaps					$ 39,000			$ 175,000	$ 361,000
Gain on Cancellation of Interest Rate Swaps							1,875
Interest Rate Derivative Assets, at Fair Value										8,169	[1]	11,695	[1]	8,169	[1]	11,695	[1]
Interest income on interest rate swaps		$ 5,510	$ 5,611	$ 7,880

[1] The fair values were based on information provided by the bank counterparties that is model-driven and where inputs were observable or where significant value drivers were observable.