Financial Instruments (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands	Oct. 02, 2011	Jan. 02, 2011
Carrying value and estimated fair value of financial instruments
Interest rate swap derivative assets	$ 8,337	$ 5,131
Restricted investments	40,952	11,910
Fixed income securities	1,915	1,791
Quoted Prices in Active Markets (Level 1) [Member]
Carrying value and estimated fair value of financial instruments
Interest rate swap derivative assets	0	0
Restricted investments	7,454	6,168
Fixed income securities	0	0
Significant Other Observable Inputs (Level 2) [Member]
Carrying value and estimated fair value of financial instruments
Interest rate swap derivative assets	8,337	5,131
Restricted investments	33,498	5,742
Fixed income securities	1,915	1,791
Significant Unobservable Inputs (Level 3) [Member]
Carrying value and estimated fair value of financial instruments
Interest rate swap derivative assets	0	0
Restricted investments	0	0
Fixed income securities	$ 0	$ 0

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investment securities as of the balance sheet date which may include marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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